Patent application number | Description | Published |
20140112611 | ROBUST MODULATOR CIRCUITS USING LATERAL DOPING JUNCTIONS - Disclosed herein are methods, structures, and devices that compensates for modulator loss and modulation inefficiencies introduced by mask misalignments in opposite oriented pn type junction modulators. More specifically, Mach-Zehnder type optical modulators are disclosed wherein both arms in the MZI modulator are arranged in a push-pull configuration and configured to experience pn type junctions of two orientations wherein both arms further configured to experience the same length of waveguide with a pn type junction of each orientation. | 04-24-2014 |
20140360013 | INTEGRATION OF ELECTRONIC CHIPS ONTO A PHOTONIC CHIP - Methods, structures, apparatus, devices, and materials to facilitate the integration of electronic integrated circuits (chips) including drivers, amplifiers, microcontrollers, etc., onto/into photonic integrated circuits (chips) using recessed windows exhibiting controlled depths onto/into the photonic chip. The electronic chips are positioned into the recessed windows and electrical connections between the electronic chips and the photonic chip are achieved by flip-chip techniques with predefined traces at a bottom of the recessed windows or direct wire bonding. Advantageously, this integration may be performed on a wafer level for large-volume productions. | 12-11-2014 |
20150063747 | FIBER ASSEMBLY FOR FACET OPTICAL COUPLING - Disclosed are structures and methods for facet optical coupling of optical fibers to photonic integrated circuits. | 03-05-2015 |
20150063769 | SLAB-MODE AND POLARIZATION CLEAN-UP IN SILICON PHOTONICS - Disclosed are structures and methods directed to waveguide structures exhibiting improved device performance including improved attenuation of scattered light and/or transverse magnetic modes. In an illustrative embodiment according to the present disclosure, a rib waveguide structure including a rib overlying a slab waveguide (or superimposed thereon) is constructed wherein the slab waveguide is heavily doped at a distance from the rib which has a very low overlap with rib guided modes. Advantageously, such doping may be of the P-type or of the N-type, and dopants could be any of a number of known ones including—but not limited to—boron, phosphorous, etc.—or others that increase optical propagation loss. As may be appreciated, the doped regions advantageously absorb scattered light which substantially improves the structure's performance. | 03-05-2015 |
Patent application number | Description | Published |
20110049078 | Coupler Draft Gear, Double-Side Operating Coupler and Lower Lockpin Rotation Shaft Assembly - A lower lockpin rotation shaft assembly includes a lower lockpin rotation shaft body, an outer end portion thereof having a first coupler lifting bar hole, an intermediate portion thereof having a connecting key; and a lower lockpin rotation shaft bush, an outer end portion of the lower lockpin rotation shaft bush having a second coupler lifting bar hole, and an inner end portion of the lower lockpin rotation shaft bush being operatively connected to an inner end portion of the lower lockpin rotation shaft body. Further, the present invention further provides a double-side operating coupler and a coupler draft gear having the above lower lockpin rotation shaft assembly. The coupler draft gear further includes two coupler lifting bars and two coupler lifting bar seats. Each of the coupler lifting bars is inserted in a keyhole-shaped through hole of corresponding coupler lifting bar seat, and the coupler lifting bar has a restrained segment at a fitted portion of the coupler lifting bar with the coupler lifting bar seat. Coupler heads of the two coupler lifting bar are inserted through the keyhole-shaped through holes of the two coupler lifting bar seats and then coupled with the first coupler lifting bar hole and the second coupler lifting bar hole of the double-side operating coupler. There is a gap between the restrained segment of each coupler lifting bar and walls of the rectangular hole of the keyhole-shaped through hole. | 03-03-2011 |
20110073555 | Coupler and Anti-Creep Mechanism For The Same - An anti-creep mechanism for coupler includes a lower lockpin rod, a coupler shank and a rotation shaft. The rotation shaft is disposed in an elongate mounting hole of the lower lockpin rod and a circular mounting hole of the coupler shank so that the lower lockpin rod and the coupler shank are hinged together. A boss is axially disposed on an upper surface of the rotation shaft, and a groove is axially provided in a wall of the mounting hole of the coupler shank above the rotation shaft to receive the boss of the rotation shaft. The rotation shaft is axially movable relative to the lower lockpin rod and the coupler shank and has two operating positions. When the rotation shaft is moved to the first operating position, an inner end portion of the boss is positioned in the elongate mounting hole of the lower lockpin rod, and a top wall of this elongate mounting hole abuts against the boss. If this lower lockpin rod is rotated in a coupler unlocking direction, the anti-creep bulge of the lower lockpin rod abuts against the anti-creep surface of the coupler shank. When the rotation shaft is moved to the second operating position, the boss is positioned in the groove of the mounting hole of the coupler shank, and the top wall of this elongate mounting hole abuts against an outer circumferential surface of the rotation shaft. The anti-creep mechanism for coupler of the present invention has a reliable dual anti-unlocking performance for coupler. Besides, the present invention further discloses a coupler. | 03-31-2011 |
Patent application number | Description | Published |
20090098460 | NEGATIVE PLATE FOR LITHIUM ION BATTERIES AND A METHOD OF PREPARING THE SAME - In one aspect, a negative plate for a battery comprises a negative current collector coated with a negative active material. The negative current collector comprises a conductive non-woven fabric. In another aspect, a method for preparing a negative plate for a battery comprises coating a negative active material onto a negative current collector. The negative current collector comprises a conductive non-woven fabric. In yet another aspect, a battery comprises a negative plate. The negative plate comprises a negative current collector coated with a negative active material. The negative current collector comprises a conductive non-woven fabric. | 04-16-2009 |
20090108808 | Battery Protection Mechanism - The present invention teaches methods and systems for detecting internal battery abnormalities during charging and discharging states. The embodiments of the invention includes a circuit for determining charging and/or discharging state of the battery, a circuit for sampling the battery voltage at sequential time points, a circuit for measuring the decline of the voltage, a counter for counting T | 04-30-2009 |
20090220858 | Composite Compound With Mixed Crystalline Structure - Described is a composite lithium compound having a mixed crystalline structure. Such compound was formed by heating a lithium compound and a metal compound together. The resulting mixed metal crystal exhibits superior electrical property and is a better cathode material for lithium secondary batteries. | 09-03-2009 |
20090286153 | PLATE ASSEMBLY, CORE AND LITHIUM ION BATTERY - Disclosed are a plate assembly for a battery, a core and a lithium ion battery. The plate assembly comprises a plate, a conductive terminal and a membrane bag, the plate is encapsulated in the membrane bag, an encapsulation line is formed when the membrane bag is encapsulated, and the conductive terminal is disposed at one end of the plate and protruded out of the membrane bag, wherein the encapsulation line has at least two loops around the periphery of the plate. The core comprises the plate assembly of the present invention. The lithium ion battery comprises the core of the present invention. Since the membrane bag included in the plate assembly of the present invention is encapsulated by at least two loops of encapsulation line around the periphery of the plate, the membrane bag can be encapsulated tightly, which can prevent effectively the membrane bag from being cracked, and prevent the short circuit from being occurred due to the contact of the positive and negative plates, and thereby effectively improves the mechanical impact resistance of the battery. | 11-19-2009 |
20090317702 | Stacked-Type Lithium Ion Battery - A stacked-type lithium ion battery, comprising a core, a battery shell, and a cover plate; said core is placed in the battery shell, said cover plate is coupled to the battery shell in a sealed manner; said core comprises a plurality of layers of positive plates, negative plates, and membranes that are stacked together with each other, and the membrane is between the positive plate and the negative plate; wherein at least two membranes are in a 5-175° included angle between their tensile directions. Since the tensile directions of the membranes are different, the overall tensile strengths of the battery in all tensile directions are essentially same; therefore, the phenomenon of short circuit in the battery resulted from membrane rupture in lower tensile strength directions can be prevented, and the battery safety performance is greatly enhanced. | 12-24-2009 |
20110126904 | BACKPLANE FOR SOLAR CELL AND SOLAR CELL HAVING THE SAME - A solar cell and a backplane for a solar cell, where the backplane comprises a metal substrate having first and second opposing major surfaces, and an insulating layer on at least one major surface of the metal substrate. The insulating layer comprises a resin selected from the group consisting of phenolic resins, epoxy resins, amino resins, and combinations thereof. | 06-02-2011 |
Patent application number | Description | Published |
20100223365 | METHOD FOR CONTROLLING PROXY BINDING OF A MOBILE NODE - A method for controlling proxy binding of a mobile node in a network that supports network-based mobility management, wherein the mobile node includes at least one network interface that is employed for attaching to the network via an access router, wherein a mobile node's binding for a network interface is initiated by a binding request, is characterized in that the mobile node's binding for a new network interface is qualified as a preliminary binding, which is not employed for downlink data transmission, and that the mobile node's preliminary binding is activated, after the mobile node's new network interface has been configured. | 09-02-2010 |
20110149899 | METHOD FOR COMMUNICATION BETWEEN NODES IN A WIRELESS NETWORK - A method for communication between nodes in a wireless network, in particular in a wireless ad hoc or mesh network, wherein multiple wireless channels with different frequency bands are provided and wherein the nodes are enabled to operate on the different channels is characterized in that each the node has assigned a home channel where it usually resides, wherein a node that leaves its home channel and switches to another of the multiple channels—temporary operating channel—provides information about the temporary operating channel on the node's home channel. | 06-23-2011 |
20120008527 | METHOD FOR SUPPORTING ROUTING DECISIONS IN A WIRELESS MESH NETWORK AND WIRELESS MESH NETWORK - A method for supporting routing decisions in a wireless mesh network, wherein the network ( | 01-12-2012 |
20120134342 | METHOD FOR COORDINATION OF WIRELESS TRANSCEIVERS OF A NETWORK NODE AND NETWORK NODE - A method for coordination of wireless transceivers of a network node, in particular for application in communication nodes of a vehicular network, wherein the network node is equipped with one or more wireless transceivers that are capable of simultaneously generating and/or receiving electromagnetic signals on different electromagnetic channels, the electromagnetic signals being potentially able to interfere with each other, is characterized in the steps of, for each pending packet transmission on a particular of the electromagnetic channels, checking the presence of ongoing and/or scheduled activity on one or more of the other of the electromagnetic channels, and deferring the pending packet transmission in case ongoing and/or scheduled activity is detected on one or more of the other of the electromagnetic channels, at least until the detected ongoing and/or scheduled activity on one or more of the other of the electromagnetic channels is completed. Furthermore, a corresponding network node is disclosed. | 05-31-2012 |
20120184321 | METHOD FOR PERFORMING COMMUNICATION IN A SELF-ORGANIZED WIRELESS NETWORK - A method for performing communication in a self-organized wireless network, in particular a vehicular network, preferably based on the IEEE 802.11 MAC protocol, wherein the network includes a plurality of network nodes each being equipped with a communication system, wherein the communication systems generate periodic messages that are transmitted via a dedicated wireless communication channel, wherein each of the communication systems employs specific transmission parameters—message interval and transmit power—for transmitting the periodic messages, is characterized in that a reliability threshold for a maximum admissible load of the communication channel is defined, and that each network node, taking into consideration information on network nodes in its surrounding, establishes a relation between the message interval and the transmit power—interval-power-relation—such that the reliability threshold is not exceeded, wherein each network node applies its established interval-power-relation to adjust transmit power and/or message interval of its outgoing periodic messages. | 07-19-2012 |
20120188964 | METHOD FOR ENABLING MULTI-CHANNEL SIGNALING IN A COMMUNICATION NETWORK - A method for enabling multi-channel signaling in a communication network, including a multitude of communication nodes, wherein the communication among the communication nodes is performed by sending and receiving messages on communication channels including a control channel and at least one service channel, is characterized in that communication nodes embed information related to communication channel usage in messages sent on one of the communication channels, in particular the control channel, wherein the information indicates to others of the communication nodes a communication channel, in particular a service channel, intended to be employed for a specific service and/or application by the communication node having sent the respective message, and wherein communication nodes that receive a message including information related to communication channel usage forward the information by embedding the information in any of their own messages to be sent on a communication channel, in particular on the control channel. | 07-26-2012 |
20140153454 | METHOD FOR RESOURCE MANAGEMENT IN A CELLULAR COMMUNICATION NETWORK AND RESOURCE MANAGEMENT SYSTEM - A method for resource management in a cellular communication network, wherein the network includes at least one base station per cell for a plurality of cells that operates in TDD (Time Division Duplex) transmission mode, wherein the base stations implement a respective UL/DL configuration mode in which frames are composed of a specific sequence of downlink DL, uplink UL and special S subframes, is characterized in that the base stations are operated such that neighboring base stations with adjacent and/or overlapping coverage areas employ different UL/DL configuration modes, wherein interference between neighboring base stations is taken account of by implementing power control on a subframe basis. Furthermore, a resource management system for use in a cellular communication network is described. | 06-05-2014 |
Patent application number | Description | Published |
20100035785 | AQUEOUS CLEANING COMPOSITION CONTAINING COPPER-SPECIFIC CORROSION INHIBITOR FOR CLEANING INORGANIC RESIDUES ON SEMICONDUCTOR SUBSTRATE - A semiconductor wafer cleaning formulation, including 1-35% wt. fluoride source, 20-60% wt. organic amine(s), 0.1-40% wt. nitrogenous component, e.g., a nitrogen-containing carboxylic acid or an imine, 20-50% wt. water, and 0-21% wt. metal chelating agent(s). The formulations are useful to remove residue from wafers following a resist plasma ashing step, such as inorganic residue from semiconductor wafers containing delicate copper interconnecting structures. | 02-11-2010 |
20130072411 | AQUEOUS CLEANING COMPOSITION CONTAINING COPPER-SPECIFIC CORROSION INHIBITOR FOR CLEANING INORGANIC RESIDUES ON SEMICONDUCTOR SUBSTRATE - A semiconductor wafer cleaning formulation, including 1-35% wt. fluoride source, 20-60% wt. organic amine(s), 0.1-40% wt. nitrogenous component, e.g., a nitrogen-containing carboxylic acid or an imine, 20-50% wt. water, and 0-21% wt. metal chelating agent(s). The formulations are useful to remove residue from wafers following a resist plasma ashing step, such as inorganic residue from semiconductor wafers containing delicate copper interconnecting structures. | 03-21-2013 |
20130206168 | APPARATUSES AND METHODS FOR SCRUBBING SUBSTRATES - One aspect of the present invention includes an apparatus for scrubbing substrates such as a roller scrubber. According to one embodiment, the apparatus comprises a scrubbing medium having an axial bore and a mandrel having a section disposed through the axial bore of the scrubbing medium. The mandrel is configured so that it exerts an adjustable axial compression on the scrubbing medium. According to another embodiment, the apparatus comprises a roller scrubber. The roller scrubber comprises a scrubbing medium comprising a plurality of discrete disks having a center hole. The disks are disposed side by side so that the center holes form an axial bore in the scrubbing medium. The combined outer edges of the plurality of disks form a scrubbing surface of the roller scrubber. | 08-15-2013 |
20130260657 | Methods and Systems for Centrifugal Casting of Polymer Polish Pads and Polishing Pads Made by the Methods - A method for making a polishing pad includes rotating a cylinder about a central axis. The cylinder encloses in an interior space a polymer precursor. The method also includes forming the polishing pad from at least some of a polymer formed after the polymer precursor has cured. The rotating of the cylinder may be continued until the polymer has cured. The method may include forming at least two distinct layers in the polishing pad by casting and curing sequentially at least two different polymer precursors. A system for manufacturing a polishing pad includes a centrifugal caster adapted to rotate. A polishing pad made by a method is provided. | 10-03-2013 |
20140078681 | LATCH MECHANISM FOR COMMUNICATIONS MODULE - In an example embodiment, a module latch mechanism includes a follower and a driver. The follower is configured to be slidingly positioned relative to a housing and to facilitate selective engagement of the housing with a host device. The follower includes a retaining member configured to retain a resilient member in at least one direction such that the resilient member urges the follower towards a first position relative to the housing. The driver is configured to be rotatingly positioned relative to the housing. The driver includes a cam configured to urge the follower towards a second position relative to the housing as the driver is rotated from a latched position to an unlatched position. | 03-20-2014 |
20140287663 | Multilayer Polishing Pads Made by the Methods for Centrifugal Casting of Polymer Polish Pads - A method for making a multilayer polishing pad includes rotating a cylinder about a central axis. The cylinder encloses in an interior space a single polymer mixture that phase separates under centrifugal force. The method also includes forming the polishing pad from at least some of a polymer formed after the polymer mixture has reacted. The method includes forming at least two distinct layers in the polishing pad by casting and gelling sequentially at least two different polymers. | 09-25-2014 |
Patent application number | Description | Published |
20130283266 | Remediating Resource Overload - A method, an apparatus and an article of manufacture for remediating overload in an over-committed computing environment. The method includes measuring resource usage of each of multiple virtual machines on each of at least one hypervisor in a computing environment, upon detection of a resource overload on one of the at least one hypervisor, determining at least one operation that is to be taken for at least one of the multiple virtual machines on the hypervisor to remediate resource overload while increasing values of running virtual machines, and sending a command to the hypervisor to issue the at least one operation. | 10-24-2013 |
20140136692 | DIAGNOSING DISTRIBUTED APPLICATIONS USING APPLICATION LOGS AND REQUEST PROCESSING PATHS - A system for supporting a distributed application includes a plurality of servers, where each of the plurality of servers includes a thread that processes a request received by the distributed application and a monitoring agent that constructs a transaction path for the request and annotates the transaction path in accordance with a writing action to a log of the distributed application to produce an annotated transaction path. In another embodiment, a system for monitoring a distributed application for errors includes a processor and a computer readable storage medium that stores instructions which, when executed, cause the processor to perform operations including constructing a transaction path for each request received by the distributed application, detecting a writing action to a log of the distributed application, and annotating the transaction path in accordance with the writing action to produce an annotated transaction path. | 05-15-2014 |
20140136896 | DIAGNOSING DISTRIBUTED APPLICATIONS USING APPLICATION LOGS AND REQUEST PROCESSING PATHS - A method for monitoring a distributed application for errors includes constructing a transaction path for each request received by the distributed application, detecting a writing action to a log of the distributed application, and annotating the transaction path in accordance with the writing action to produce an annotated transaction path. In another embodiment, a method for building a knowledge base for use in diagnosing an error occurring in a distributed application includes executing the distributed application on a replica of a production server that supports the distributed application, constructing a transaction path for a request received by the distributed application, wherein the transaction path traverses the replica, injecting a fault into the transaction path, detecting a writing action to a log of the distributed application, wherein the writing action is a response to the fault, and storing an association between the fault and the writing action. | 05-15-2014 |
20140172405 | EVALUATING DISTRIBUTED APPLICATION PERFORMANCE IN A NEW ENVIRONMENT - A method for evaluating the performance of an application when migrated from a first environment in which the application is currently executing to a different second environment includes generating a configuration file using data obtained from the application executing in the first environment, installing the configuration file in a virtual machine residing in the second environment, launching the application in the virtual machine after the installing, and obtaining a metric indicative of the performance from the virtual machine. | 06-19-2014 |
20140172406 | EVALUATING DISTRIBUTED APPLICATION PERFORMANCE IN A NEW ENVIRONMENT - Evaluating the performance of an application when migrated from a first environment in which the application is currently executing to a different second environment includes generating a configuration file using data obtained from the application executing in the first environment, installing the configuration file in a virtual machine residing in the second environment, launching the application in the virtual machine after the installing, and obtaining a metric indicative of the performance from the virtual machine. | 06-19-2014 |
Patent application number | Description | Published |
20090276546 | TECHNIQUES FOR DETECTION AND SERIAL COMMUNICATION FOR A NON-USB SERIAL INTERFACE OVER USB CONNECTOR - According to an example embodiment, an apparatus may include a non-Universal Serial Bus (non-USB) serial interface, a USB connector, a first protection circuit connected between a first data connection of the non-USB serial interface and a first data connection of the USB connector, a second protection circuit connected between a second data connection of the non-USB serial interface and a second data connection of the USB connector, a processor, and a detection circuit connected to the second data connection of the USB connector, the detection circuit configured to output a signal to the processor indicating an attachment or connection of a second non-USB serial interface to the USB connector. | 11-05-2009 |
20110268020 | COMMUNICATING WITH TWO NODES WITH OVERLAPPING FRAMES - According to an example embodiment, a wireless node may determine that a first reserved retransmission frame overlaps with a second reserved transmission frame and a second reserved retransmission frame and that the second reserved transmission frame overlaps with a first reserved transmission frame and the first reserved retransmission frame. The first reserved transmission frame and the first reserved retransmission frame may be reserved for wireless communication with a first master node, and the second reserved transmission frame and the second reserved retransmission frame are reserved for wireless communication with a second master node. The wireless node may also process and acknowledge data received from the first master node during the first reserved transmission frame based on the determining, ignore data sent by the second master node during the second reserved transmission frame based on the determining, and process and acknowledge data received from the second master node during the second reserved retransmission frame based on the determining. | 11-03-2011 |
20120104994 | SINK CURRENT ADAPTATION BASED ON POWER SUPPLY DETECTION - Techniques are provided for selecting a charge current to be sunk by a mobile electronic device. A charging device is received at a connector of the mobile electronic device. The charging device is configured to supply a charge current to a rechargeable battery of the mobile electronic device. One or more data signals is/are received from the charging device at an interface circuit of the mobile electronic device on one or more data signal lines through the connector. One or more control signals are applied to the interface circuit to enable data signal values to be generated for the data signal(s) based on the control signal(s) and a type of the charging device. The data signal values are mapped to a maximum charge current for the rechargeable battery. The charge current supplied by the charging device to the rechargeable battery is limited to the selected maximum charge current. | 05-03-2012 |
20130165044 | Bluetooth Low Energy Module Systems and Methods - Disclosed are various embodiments of Bluetooth low energy (BLE) modules and methods implemented therein. An embodiment of the disclosure can obtain in a BLE module an advertiser packet transmitted by a BLE advertiser. An advertiser cache can be checked to determine whether the advertiser cache in the BLE module contains an entry associated with an advertiser address from the advertiser packet. The BLE module can determine whether a payload value of the advertiser packet has changed relative to a previous advertiser packet associated with the advertiser address. The BLE module can then suppress forwarding of the packet to a host processor and/or on-board processor executing firmware. The BLE module can also suppress sending a scan request packet back to the BLE advertiser. | 06-27-2013 |
20130308611 | COMMUNICATING WITH TWO NODES WITH OVERLAPPING FRAMES - A first wireless node may determine that a first reserved retransmission frame overlaps with a second reserved transmission frame and a second reserved retransmission frame and that the second reserved transmission frame overlaps with a first reserved transmission frame and the first reserved retransmission frame. The first reserved transmission frame and the first reserved retransmission frame may be reserved for wireless communication with a first master node, and the second reserved transmission frame and the second reserved retransmission frame are reserved for wireless communication with a second master node. The wireless node may also process and acknowledge data received from the first master node during the first reserved transmission frame based on the determining, ignore data sent by the second master node during the second reserved transmission frame based on the determining, and process and acknowledge data received from the second master node during the second reserved retransmission frame. | 11-21-2013 |
Patent application number | Description | Published |
20120212162 | METHOD AND SYSTEM FOR CONTROLLING AN ELECTRIC MOTOR WITH COMPENSATION FOR TIME DELAY IN POSITION DETERMINATION - A sensor detects position data for a rotor of the motor at a first time. A data processor receives the detected position data associated with a first time delay. A sensing circuit senses an analog current at the motor during a second time delay. An analog-to-digital converter converts the analog current to a digital current data during a third time delay. The fourth time delay is detected between actual current reading instant and position reading instant in a data processor. The digital phase current data is transformed into measured direct and quadrature axes control current data based on synchronization or temporal alignment of the position data with the actual measured analog phase current at the starting time by compensating the position data by a sum of the second time delay, the third time delay and the fourth time delay, where the first time delay is subtracted from the sum. | 08-23-2012 |
20120212167 | METHOD AND SYSTEM FOR CONTROLLING AN ELECTRIC MOTOR WITH VARIABLE SWITCHING FREQUENCY AT VARIABLE OPERATING SPEEDS - A data processor establishes a first range of rotational speeds of a rotor of the motor from a first lower limit to a first higher limit and a second range of rotational speeds from a second lower limit to a second higher limit. A hysteresis band or a rotational range of speeds is established such that during operation in the first range the first higher limit is adjusted (e.g., raised by a first amount to be greater than the second lower limit). A sensor detects or measures a rotational speed of a rotor of the motor. The data processor determines whether the measured rotational speed falls within the first range or the second range, as adjusted by the hysteresis band, to identify a selected speed range. A switching frequency of a pulse-width modulation signal is varied in accordance with the selected speed range. | 08-23-2012 |
20120212169 | METHOD AND SYSTEM CONTROLLING AN ELECTRICAL MOTOR WITH TEMPERATURE COMPENSATION - A temperature estimation module estimates a change in temperature of the magnets associated with the rotor of the motor based on an operational magnetic flux strength that is compared to a reference magnetic flux strength determined at a known ambient temperature and for a predetermined operating range of the motor The temperature estimation module or the system establishes a relationship between the estimated change in the temperature and a magnetic torque component of a target output torque of the motor consistent with the predetermined operating range. The current adjustment module or the system adjusts a command (e.g., quadrature-axis current command) for the motor to compensate for shaft torque variation associated with the estimated change in the temperature in conformance with the established relationship. | 08-23-2012 |
20120217908 | METHOD AND SYSTEM FOR CONTROLLING AN ELECTRIC MOTOR AT OR NEAR STALL CONDITIONS - A data processor determines whether a composite torque command is larger than a preset torque threshold for a time interval. The composite torque command is convertible into a direct-axis current command and a quadrature-axis current command. The data processor determines whether a rotor speed of the motor is less than a preset speed threshold for the time interval. The data processor, the current adjustment module, or the current shaping module adjusts the direct-axis current command and the quadrature-axis current command to obtain a revised direct-axis current command and revised quadrature-axis current command for the time interval if the composite torque command is larger than the preset torque threshold and if the rotor speed is less than the preset speed threshold, where the revised current commands vary by the detected rotational position of the rotor to achieve a generally constant shaft torque output. | 08-30-2012 |
20120217909 | Synchronization of Position and Current Measurements in an Electric Motor Control Application using an FPGA - A system and method for controlling an alternating current (AC) motor using a Field Programmable Gate Array (FPGA) to read the current and position measurements in an the AC motor, perform digital filtering of the position and current data, provide very precise synchronization of the measured phase current and position data, and output the data to a phase converter for control of the AC motor. | 08-30-2012 |
20120217911 | INTERIOR PERMANENT MAGNET MACHINE SYSTEMS AND METHODS FOR CONTROLLING INTERIOR PERMANENT MAGNET MACHINES - Example embodiments disclose an Interior Permanent Magnet (IPM) machine system including an IPM machine including a nominal operating direct current (dc) bus voltage, and a controller configured to detect an operating dc bus voltage of the IPM machine and to control the IPM machine based on the nominal operating dc bus voltage and the detected operating dc bus voltage. | 08-30-2012 |
20120217912 | METHOD AND SYSTEM FOR CALIBRATING ROTOR POSITION OFFSET OF AN ELECTRIC MOTOR - While enforcing a fake position in the data processing system and applying a zero direct-axis current command, positive and negative quadrature-axis current commands are applied sequentially and at approximately same magnitude to urge the rotor toward an enforced position. A processing module measures a positive quadrature-axis current aligned raw position data after application of the positive quadrature-axis current command and measures negative quadrature-axis current aligned raw position data for the rotor after application of the negative quadrature-axis command. An initial position offset calibrator or data processor determines a difference between the raw position data to determine an alignment of a true averaging axis. An initial position offset calibrator or data processor determines a raw averaging axis position data based on an average of the raw position data. An initial position offset calibrator or data processor determines a position offset based on a difference between the determined true averaging axis and the determined raw averaging axis position data. | 08-30-2012 |
20120217913 | METHOD AND SYSTEM FOR DETERMINING A POSITION OF A ROTOR OF AN ELECTRIC MOTOR WITH NOISE REDUCTION - A data storage device stores previous position readings of the rotor for a previous cycle of a pulse width modulation signal applied to the motor. A current raw position reading for the current cycle is received. A predicted position reading for a current cycle is determined based on at least one of the stored previous position readings of the previous cycle. A data processor determines whether a difference between the current raw position reading and the predicted position reading for a first mode and a second mode is within one or more preset thresholds. The data processor selects the current raw position reading as a verified reliable final position reading if a first difference for the first mode is equal to or less than a primary preset threshold or if a second difference for the second mode is equal to or less than a secondary preset threshold. | 08-30-2012 |
20120217915 | System for Calibrating an Electrical Control System - A method calibrates a current sensing instant to latch a current value from a set of current signals. A current command including a magnitude at a Gamma angle is provided to control a motor when the motor is operating in a motoring mode at a shaft speed. A matching current command including a same magnitude at a same Gamma angle is provided to control the motor when the motor is operating in a braking mode at a same shaft speed. A first actual averaging rms current magnitude of three phase currents of the motor is monitored when the motor is controlled by the current command and operating in the motoring mode. A second actual averaging rms current magnitude of the three phase currents of the motor is monitored when the motor is controlled by the matching current command and operating in the braking mode. A current sensing instant is adjusted until an observed first actual averaging rms current magnitude in the motoring mode equals an observed second actual averaging rms current magnitude in the braking mode. | 08-30-2012 |
20120217916 | Device And Method For Generating An Initial Controller Lookup Table For An IPM Machine - Embodiments of the present invention provide a device and method for generating initial operating points for controlling an interior permanent magnet (IPM) machine. The method includes loading an inductance lookup table, first calculating a maximum torque per Ampere (MTPA) trajectory for a first threshold speed based on machine parameters of the IPM machine, second calculating a truncated voltage limit ellipse with monotonically increasing torque for a first speed based on the machine parameters, if the first speed is higher than the first threshold speed, determining an operating trajectory at the first speed based on at least one of the calculated MTPA trajectory and the calculated truncated voltage limit ellipse, and generating an I | 08-30-2012 |
20120217921 | METHOD AND SYSTEM FOR EVALUATING ELECTRICAL CONNECTIONS BETWEEN AN MOTOR CONTROLLER AND MOTOR - A pair of direct d-q-axis voltage commands is associated with a monotonically varying test sequence of test rotor angular positions to determine a correct rotational direction of a rotor of the motor in response to application of the pair of direct d-q-axis voltage commands to the motor. The rotor of the motor rotates (e.g., self spins in a diagnostic mode) in response to the applied direct d-q-axis voltage commands and applied monotonically varying test sequence of test rotor angular positions. The primary positioning module or data processor determines that conductor connections between the inverter (e.g., motor controller) and the motor are correct if the calculated shaft speed sign is positive with respect to an applied monotonically varying test sequence of rotor angular positions that monotonically increases. | 08-30-2012 |
20120217923 | System for Controlling a Motor - A control system for a motor includes a current regulation controller for generating a terminal voltage command. The terminal voltage command is used for converting a supply voltage to a three phase voltage to power a motor. The control system also includes a terminal voltage command feedback module for controlling the terminal voltage command. The terminal voltage command feedback module compares the terminal voltage command to a determined voltage limit of the supply voltage and generates a d-axis current adjustment command in accordance with the comparison. The d-axis current adjustment command is used for reducing the terminal voltage command below the determined voltage limit. The control system also includes a summer coupled with the terminal voltage command feedback module. The summer adds the d-axis current adjustment command to a d-axis current command received from a lookup table. | 08-30-2012 |
20120221280 | Method And Apparatus For Characterizing An Interior Permanent Magnet Machine - One embodiment of the method includes setting up a testing architecture where the testing architecture includes a test IPM machine having an output shaft coupled to an output shaft of a secondary speed control machine. The method further includes controlling the secondary speed control machine to drive the output shaft of the test IPM machine at a first desired speed, determining a pair of desired direct and quadrature axis currents for each of a plurality of peak current magnitudes, and recording characterization data associated with each pair of desired direct and quadrature axis currents. The controlling, determining and recording steps for each of a second through nth desired speeds may be repeated. Control lookup tables for operation of an IPM machine may be generated from the characterization data. | 08-30-2012 |
20120277942 | SYSTEM AND METHOD FOR CHARGING CAPACITORS OF AN ELECTRIC VEHICLE - An electric vehicle is provided having an electric generator and a motor. A voltage bus including a DC link is configured to provide generated electrical energy to the motor. A controller may estimate the charging current to a capacitor of the voltage bus based on the current commanded from the generator and the voltage measured across the capacitor. The controller may adjust the charging rate of the capacitor based on the estimated charging current. | 11-01-2012 |
20140306637 | METHOD AND APPARATUS FOR CONTROLLING AN ALTERNATING CURRENT MACHINE - In one example embodiment, a device for controlling an alternating current (AC) machine is disclosed. The device includes a processor configured to determine a plurality of instantaneous voltages corresponding to a plurality of phase voltages of an inverter, the inverter driving the AC machine. The processor is further configured to determine an actual line-to-line voltage of the inverter based on the plurality of instantaneous voltages. The processor is further configured to determine a terminal voltage feedback for controlling the AC machine, based on the determined actual line-to-line voltage and a terminal voltage threshold. | 10-16-2014 |
20140306638 | METHODS OF DETERMINING MACHINE TERMINAL VOLTAGE AND SYSTEMS THEREOF - At least one example embodiment discloses a control device for controlling an alternating current (ac) machine. The control device includes a processor configured to select a modulation mode from a plurality of modulation modes, determine a plurality of present phase voltages corresponding to phases of an inverter based on the selected modulation mode, the determination compensating for deadtimes associated with the selected modulation mode and phases of the inverter, the inverter configured to drive the ac machine and determine an estimated terminal voltage based on the plurality of present phase voltages. | 10-16-2014 |
20150057868 | DC BUS VOLTAGE CONTROL - Provided is a method and controller for controlling a vehicle dc bus voltage. The method includes generating a parameter. The parameter is based on a reference dc bus voltage squared. The method includes controlling the vehicle dc bus voltage based on the parameter and a detected dc bus voltage. The method may also include generating another parameter based on a power demand associated with at least one of a motoring mode operation and a generating mode operation of a traction motor associated with the vehicle. The power demand is indicated in a message received via a dedicated high speed data bus. The method includes controlling the vehicle dc bus voltage based on the another parameter. | 02-26-2015 |
Patent application number | Description | Published |
20120091464 | GaN LEDs with Improved Area and Method for Making the Same - Enlightening device and method for making the same are disclosed. Individual light emitting devices such as LEDs are separated to form individual dies by process in which a first narrow trench cuts the light emitting portion of the device and a second trench cuts the substrate to which the light emitting portion is attached. The first trench can be less than 10 μm. Hence, a semiconductor area that would normally be devoted to dicing streets on the wafer is substantially reduced thereby increasing the yield of devices. The devices generated by this method can also include base members that are electrically conducting as well as heat conducting in which the base member is directly bonded to the light emitting layers thereby providing improved heat conduction. | 04-19-2012 |
20120091920 | LED Light Source with Direct AC Drive - A light source and method for operating a light source are disclosed. The present invention includes a light source and method for using the same. The light source includes a power coupler, a reconfigurable two-dimensional LED array and a controller. The power coupler is configured to receive a power potential that varies as a function of time. The LED array has a plurality of configurations of LEDs, each configuration being characterized by a minimum bias potential and a maximum bias potential. The LED array generates light when a potential between first and second power terminals is greater than the minimum bias potential. The controller varies the configuration of the array such that the power potential remains between the minimum and maximum bias potentials as the power potential varies. | 04-19-2012 |
20140054638 | LIGHT EMITTING DEVICES HAVING SHIELDED SILICON SUBSTRATES - Light emitting devices comprise a light emitting component, such as a GaN LED having active material layers supported by a Silicon substrate, which can be a growth substrate, or attached. Phosphor(s) can be disposed relative to the light emitting component to absorb a primary emission, and produce a secondary emission that can be relatively tuned or selected so that their combination produces light of a desired spectrum, such as light appearing white. The Silicon substrate has exposed sidewalls, which can be angled, with respect to planar surfaces of the substrate, and a light reflecting material, such as a diffusely reflective material coats the sidewalls. The reflective material can be opaque to the primary and secondary emissions. If other exposed portions of the Silicon substrate exist and are exposed to primary or secondary light, these other exposed portions can be coated with such light reflecting material. | 02-27-2014 |
20140167082 | GaN LEDs WITH IMPROVED AREA AND METHOD FOR MAKING THE SAME - Enlightening device and method for making the same are disclosed. Individual light emitting devices such as LEDs are separated to form individual dies by process in which a first narrow trench cuts the light emitting portion of the device and a second trench cuts the substrate to which the light emitting portion is attached. The first trench can be less than 10 μm. Hence, a semiconductor area that would normally be devoted to dicing streets on the wafer is substantially reduced thereby increasing the yield of devices. The devices generated by this method can also include base members that are electrically conducting as well as heat conducting in which the base member is directly bonded to the light emitting layers thereby providing improved heat conduction. | 06-19-2014 |
Patent application number | Description | Published |
20140071340 | MOBILE DEVICE AND OPTICAL IMAGING LENS THEREOF - The present invention provides a mobile device and an optical imaging lens thereof. The optical imaging lens comprises an aperture stop, first, second, third and fourth lens elements positioned sequentially from an object side to an image side. The first lens element with positive refracting power has a surface facing toward the object side. The second lens element with negative refracting power has a convex surface facing toward the object. The third lens element has a positive refracting power. The fourth lens element has a surface facing toward the object side with a concave portion in the vicinity of the optical axis and a surface facing toward the image side with a convex portion in the peripheral vicinity. The optical imaging lens of the present invention is capable of shortening the total length of the optical imaging lens efficiently and has good optical characteristics. | 03-13-2014 |
20140307149 | OPTICAL IMAGING LENS SET AND ELECTRONIC DEVICE COMPRISING THE SAME - An optical imaging lens set from an object side toward an image side along an optical axis in order includes: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element having an image-side surface with a convex portion in a vicinity of the optical axis, a fourth lens element having an object-side surface with a concave portion in a vicinity of the optical axis, and a fifth lens element having an object-side surface with a convex portion in a vicinity of its circular periphery. | 10-16-2014 |
20150070784 | MOBILE DEVICE AND OPTICAL IMAGING LENS THEREOF - The present invention provides a mobile device and an optical imaging lens thereof. The optical imaging lens comprises a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better image performance and the total length of the optical imaging lens is shortened. | 03-12-2015 |
Patent application number | Description | Published |
20130271067 | PORTABLE CHARGER - A portable charger includes a main body, an electrically connecting mechanism, and a charging module. The main body includes a receiving body and a support seat extending from one side of the receiving body and bent substantially perpendicularly from the receiving body. The electrically connecting mechanism includes a connecting member movably mounted on the support seat. The charging module includes a storage member received in the receiving body and at least one interface electrically connected to the storage member. The storage member is electrically connected to the connecting member. | 10-17-2013 |
20130322028 | ELECTRONIC DEVICE WITH DISPLAY PANEL - An electronic device includes a housing and a functional module received in the housing. The housing includes a bottom wall, two sidewalls extending from opposite sides of the bottom wall, and two connecting walls. Each of the connecting walls extends from an edge of each sidewall away from the bottom wall and bends towards to the other of the connecting walls. The bottom wall, the sidewalls and the connecting walls cooperatively form a receiving space having at least one opening. The functional module includes a fixing frame positioned adjacent to the bottom wall, a circuit board positioned on the fixing frame, and a display panel positioned on circuit board away from the fixing frame and electrically connected with the circuit board. The fixing frame is capable of being slidably pushed into the housing via the at least one opening together with the circuit board and the display panel. | 12-05-2013 |
20130329345 | HOUSING STRUCTURE AND ELECTRONIC DEVICE USING THE SAME - A housing structure includes a shell integrally formed in aluminum and at least one mounting member. The shell includes a bottom wall, a first end wall, a second end wall and a top wall connected to the first end wall and the second end wall. The first end wall and the second end wall extend from opposite ends of the bottom wall. The bottom wall, the first end wall, the second end wall, and the top wall cooperatively form a receiving space with at least one opening. A first installation rail and a second installation rail protrude respectively from inners wall of the first end wall and the second end wall. The at least one mounting member is connected with the first installation rail and the second installation rail to enclose the at least one opening. The disclosure also supplies an electronic device using the same. | 12-12-2013 |
Patent application number | Description | Published |
20130294209 | VOICE CONTROL OF OPTICAL DISK DRIVE - A control circuit for an optical disk drive includes a microphone, an analog-to-digital (A/D conversion) module, a control module, and a processing module configured to compare a digital representation of a spoken command from a user against the operation representation of the control module. If the processing module determines that a spoken command in the analog form, is equal to the digital signal, the control module acts on the command and controls the optical disk drive to change its status. | 11-07-2013 |
20140320026 | LIGHTING DEVICE - A lighting device includes a lighting unit, a control unit, and a brightness adjusting unit connected between the control unit and the lighting unit. The brightness adjusting unit includes an operational amplifier and a number of branch circuits parallel connected between the control unit and a positive input terminal of the operational amplifier. Each branch circuit includes a diode and a photoresistor. A reference voltage is applied to an inverting input terminal of the operational amplifier. The operational amplifier compares a voltage on the positive input terminal and the reference voltage, and output a voltage via an output terminal to the lighting unit according to a comparing result. The control unit further controls the diode to switch between a turned on state and a turned off state to adjust the sensitivity of the lighting device in response to user input. | 10-30-2014 |
20140379109 | PROTECTION CIRCUIT FOR MACHINE TOOL CONTROL CENTER - A protection circuit is coupled to a switch circuit of a machine tool for protection. The protection circuit comprises a fatigue protection unit and a misoperation protection unit. The fatigue protection unit comprises a first sensor, a first processor, a first controller, and an alarm module. The misoperation protection unit comprises a second sensor, a second processor, and a second controller. The protection circuit senses the degree of fatigue and the misoperation of people through the fatigue protection unit and the misoperation protection unit, then controls the machine tool to work or not to work to avoid accidents. | 12-25-2014 |
20150054861 | BRIGHTNESS ADJUSTING CIRCUIT FOR DISPIAY - A brightness adjusting circuit is coupled to a display. The brightness adjusting circuit includes an acquisition module, a conversion module, a control module, and a processing module. The conversion module is connected to the acquisition module. The control module is connected to the conversion module. The processing module is connected to the control module and the conversion module. The display receives brightness signals outputted from the processing module and adjusts the brightness of the display. | 02-26-2015 |