Patent application number | Description | Published |
20100182038 | Setup and method for testing a permanent magnet motor - A test setup for a permanent magnet motor provides a method for identifying symmetry or asymmetry in the magnetic fields of the motor's permanent magnets. The setup comprises a test circuit that includes a fixed reference node that provides a stable reference to which the motor's common node can be compared. Observing the waveform of the voltage between the two nodes while the motor is running helps identify an imbalance in the magnetic fields of the motor's permanent magnets. | 07-22-2010 |
20110041533 | SCREW COMPRESSOR DRIVE CONTROL - An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented. | 02-24-2011 |
20120206163 | Method for Monitoring a Permanent Magnet Motor - A test setup for a permanent magnet motor provides a method for identifying symmetry or asymmetry in the magnetic fields of the motor's permanent magnets. The setup comprises a test circuit that includes a fixed reference node that provides a stable reference to which the motor's common node can be compared. Observing the waveform of the voltage between the two nodes while the motor is running helps identify an imbalance in the magnetic fields of the motor's permanent magnets. | 08-16-2012 |
20130145787 | SCREW COMPRESSOR DRIVE CONTROL - An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented. | 06-13-2013 |
20150052921 | SCREW COMPRESSOR DRIVE CONTROL - An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented. | 02-26-2015 |
Patent application number | Description | Published |
20140216081 | AXIAL THRUST CONTROL FOR ROTARY COMPRESSORS - Systems and methods are used to control operation of a rotary compressor of a refrigeration system to limit or prevent movement of rotors due to axial thrust loading resulting from rapid changes in speed of the rotors of the compressor. The operational profile of the motor is controlled to maintain acceleration torque and deceleration torque within predefined limits. The acceleration torque and deceleration torque are maintained within the predefined limits by controlling the speed of the motor, or by controlling the torque applied by the motor to the rotors during acceleration or deceleration. | 08-07-2014 |
20140222212 | DYNAMIC SIMULATED MOTOR - A controller is configured to generate control signals to control a variable frequency drive coupled with a load. A simulator receives the control signals and processes the control signals. The simulator simulates a variable frequency drive and a load by generating feedback signals based on a model and the control signals. The controller receives the feedback signals from the simulator. | 08-07-2014 |
20150311695 | VARIABLE FREQUENCY DRIVE OVERVOLTAGE PROTECTION - Overvoltage protection apparatuses, systems and methods for variable frequency motor drives are disclosed. In an exemplary embodiment, a variable frequency motor drive system including a rectifier, a DC bus electrically coupled with the rectifier, and an inverter electrically coupled with the DC bus is provided. A protection device electrically coupled with the rectifier and configured to interrupt power supply to the system based upon fault conditions is provided. A controller is provided and configured to receive information indicative of a voltage of the DC bus, process the received information to model a condition of at least one component of the variable frequency motor drive, and control the protection device to interrupt power supply to the variable frequency motor drive if the modeled condition meets a fault criterion. | 10-29-2015 |
20150318813 | REFRIGERANT COMPRESSOR DRIVES OFFERING ENHANCED ROBUSTNESS, EFFICIENCY AND RATED VOLTAGE OPERABILITY - Apparatuses, methods, and systems offering enhanced robustness, efficiency and rated voltage operability for refrigerant compressor drives are disclosed. An exemplary embodiment is a method of operating a variable frequency drive. The method includes operating the drive over a first operating range to provide at least a desired operating speed and minimize d-axis current, operating the drive over a second operating range including injecting d-axis current to provide at least the desired operating speed, operating the drive over a third operating range at a de-rated speed less than the desired operating speed. In the first operating range the drive input voltage is greater than a first value. In the second operating range the drive input voltage is lower than the first value and greater than a second value. In the third operating range the drive input voltage is lower than the second value. | 11-05-2015 |
20150323396 | VARIABLE FREQUENCY DRIVE TEMPERATURE DETERMINATION - Temperature value determination of at least one variable frequency drive component is provided. In one form, a method includes providing a variable frequency drive that includes a first component in thermal communication with a second component in thermal communication with a switching device. A temperature value of the second component is determined using a temperature value of the first component, a power loss characteristic of the drive, and a first characteristic of heat transfer between the first and second components. The method further includes sensing a temperature value of the second component and determining a temperature value for the switching device using the power loss characteristic, a second characteristic of heat transfer between the second component and the switching device, and the greater of the sensed and determined temperature values of the second component. Further embodiments, forms, features, and aspects shall become apparent from the description and drawings. | 11-12-2015 |
20150327399 | VARIABLE FREQUENCY DRIVE OPERATION TO AVOID OVERHEATING - Operation of a variable frequency in a manner configured to avoid overheating is provided. In one form, a method includes providing a variable frequency drive that includes a switching device in thermal communication with a heat sink including a thermal mass. The method further includes operating the drive in a first mode before active cooling of the heat sink is established and a second mode following the first mode. Operation of the drive in the first mode includes operating the switching device in a first switching frequency mode, and the first switching frequency mode and the thermal mass of the heat sink are selected to provide a temperature of the switching device below a predetermined threshold before active cooling of the heat sink is established. Further embodiments, forms, features, and aspects shall become apparent from the description and drawings. | 11-12-2015 |
20150330659 | HVAC ELECTRICAL SYSTEM POWER SUPPLY PACKAGING SYSTEM - Embodiments of a HVAC electrical system power supply packaging system within an ultimate enclosure are provided. The HVAC electrical system power supply packaging system provides serviceability, safety, manufacturability, and system management failure diagnostic reporting enhancements over conventional packaging systems while conforming to agency safety requirements. The embodiments disclosed herein also reduce equipment and service costs for HVAC electrical system power supply components provided within the HVAC electrical system power supply packaging system by reducing delays in servicing these components. Thus, customer uptime of the HVAC system can be increased. | 11-19-2015 |
20150333668 | VARIABLE FREQUENCY DRIVE ACTIVE HARMONIC MITIGATION CONTROLS AND DIAGNOSTICS - Variable frequency drive active harmonic mitigation controls and diagnostics are disclosed. Exemplary controls and diagnostics include operating a variable frequency drive including converting an AC input line voltage to a DC voltage, generating a motor drive signal using the DC voltage, and driving an electric motor with the motor drive signal. A harmonic mitigation signal is provided to the drive configured to at least partially mitigate harmonics during the operation of the drive. The harmonic mitigation signal is inhibited based upon presence of an error condition associated with the drive input. The inhibiting is terminated based upon the absence of the error condition. A diagnostic fault condition based upon a number of occurrences of the error condition. | 11-19-2015 |
20150357955 | MAGNET DEGRADATION AND DAMAGE CONTROLS AND DIAGNOSTICS FOR PERMANENT MAGNET MOTORS - Techniques for motor magnet degradation controls and diagnostics are disclosed. An exemplary technique determines q-axis current, d-axis current, q-axis voltage, and/or d-axis voltage of a permanent magnet motor based upon sensed current and voltage information of the motor. This information is utilized to determine flux information. The flux information is utilized in evaluating collective state conditions of a plurality of motor magnets and evaluating localized state conditions of a subset of the plurality of motor magnets. The evaluations can be used to identify degradation or damage to one or more of the magnets which may occur as a result of elevated temperature conditions, physical degradation, or chemical degradation. | 12-10-2015 |
20150377536 | CONTROLS AND OPERATION OF VARIABLE FREQUENCY DRIVES - Unique apparatuses, methods, and systems of opposing, limiting, and/or preventing undesired or un-commanded compressor rotation are disclosed. One exemplary embodiment is an HVACR system comprising a variable frequency drive configured to drive an electric motor to rotate a screw compressor or scroll compressor. A controller is configured to monitor various aspects of the system and to control the drive. When a condition indicative of potential undesired or un-commanded compressor rotation is identified, the controller commands the variable frequency drive to control the motor to limit and preferably prevent compressor rotation. One technique comprises shorting switches of the drive to a DC bus rail to allow back EMF induced current in the motor windings to be dissipated through winding resistance thus providing a damping force. Another technique comprises controlling the inverter to insert a DC current into the motor to cause the motor to align to and hold a particular position. | 12-31-2015 |
20150377537 | APPARATUSES, SYSTEMS, AND METHODS OF VARIABLE FREQUENCY DRIVE OPERATION AND CONTROL - An exemplary system includes a compressor, a condenser, an expander, and an evaporator fluidly coupled to form a vapor-compression circuit, and an electric motor configured to drive the compressor. An inverter having a plurality of switching elements is configured to provide an output voltage to the electric motor through operation of the switching elements. A waste heat recovery circuit is configured to transfer waste heat from the inverter to a load. A controller is configured provide switching commands to the switching elements of the inverter. The controller is further configured to sense a condition of the system, determine a heat production requirement based at least in part upon the system condition, and to vary the number of switching commands per unit time based at least in part upon the heat production requirement. | 12-31-2015 |
20160056750 | VARIABLE FREQUENCY DRIVE SELF-CHECK - Diagnostic and/or control methods, systems and apparatuses for variable frequency drives are disclosed. The variable frequency drive may be controlled by a controller that may conduct one or more tests or evaluations. The tests or evaluations may include determining whether a switching device in the variable frequency drive is open-circuited, short-circuited, or operating normally. The tests may include determining whether current provided at an inverter output of the variable frequency drive is within a predetermined range. An exemplary embodiment evaluates the drive for a short circuit condition, an open circuit condition, and a sensor error or failure condition, controls operation of the drive based upon these one or more evaluations, may abort operation of the drive based upon one or more evaluations, and may set a fault code indicative of the type of error encountered. | 02-25-2016 |
Patent application number | Description | Published |
20080273290 | Electrochemical Double-Layer Capacitor Using Organosilicon Electrolytes - Disclosed are supercapacitors having organosilicon electrolytes, high surface area/porous electrodes, and optionally organosilicon separators. Electrodes are formed from high surface area material (such as porous carbon nanotubes or carbon nanofibers), which has been impregnated with the electrolyte. These type devices appear particularly suitable for use in electric and hybrid electric vehicles. | 11-06-2008 |
20090088583 | Organosilicon Amine-Based Electrolytes - Disclosed are electrolytes that are organosilicon amine-based, and supercapacitors which incorporate them. These electrolytes are quaternary ammonium salts with an organosilicon moiety. They appear particularly suitable for use at high voltages in applications such as electric and hybrid electric vehicles. | 04-02-2009 |
20100029970 | Organosilicon Phosphorus-Based Electrolytes - Disclosed are electrolytes that are organosilicon phosphorus-based, and supercapacitors which incorporate them. These electrolytes are cationic salts with a phosphorous containing organosilicon moiety. They appear particularly suitable for use in applications such as electric and hybrid electric vehicles. | 02-04-2010 |
20100149726 | Organosilicon Amine-Based Electrolytes - Disclosed are electrochemical double-layer capacitors having an electrode with a substrate and an electrolyte/quaternary ammonium salt capable of penetrating the substrate. Such salts have a moiety of the following formula: | 06-17-2010 |
20110059340 | Conductive Plastic Bipolar Battery or Capacitor with Siloxane Electrolyte - The present invention includes a conductive plastic that is used as an electrode substrate in bipolar batteries. This conductive plastic has shown resistances as low as 1 ohm cm | 03-10-2011 |
20110266490 | Organosilicon Glycol-Based Electrolytes With A Hydroxy Terminus - Disclosed are hydroxy terminated alkylsilane ethers with oligoethylene oxide substituents. They are suitable for use as electrolyte solvents and particularly well suited for use with aqueous environment electrolytic capacitors. Methods for synthesizing these compounds are also disclosed. | 11-03-2011 |
20110274985 | Lithium/Carbon Monofluoride Batteries With Organosilicon Electrolytes - Disclosed are lithium/carbon monofluoride batteries suitable for long term use at highly elevated temperatures. Organosilicon electrolytes having low vapor pressure and high flash points are used, along with lithium salts and ceramic separators. Methods of using these batteries at high temperatures are also disclosed. | 11-10-2011 |
20120115041 | ELECTROCHEMICAL DEVICE HAVING ELECTROLYTE INCLUDING DISILOXANE - One example of the disiloxanes include a backbone with a first silicon and a second silicon. The first silicon is linked to a first substituent selected from a group consisting of: a first side chain that includes a cyclic carbonate moiety; a first side chain that includes a poly(alkylene oxide) moiety; and a first cross link links the disiloxane to a second siloxane and that includes a poly(alkylene oxide) moiety. In some instance, the second silicon is linked to a second substituent selected from a group consisting of: a second side chain that includes a cyclic carbonate moiety, and a second side chain that includes a poly(alkylene oxide) moiety. | 05-10-2012 |
20120135313 | ELECTROLYTE INCLUDING SILANE FOR USE IN ELECTROCHEMICAL DEVICES - The electrolyte includes one or more salts and a silane. The silane has a silicon linked to one or more first substituents that each include a poly(alkylene oxide) moiety or a cyclic carbonate moiety. The silane can be linked to four of the first substituents. Alternately, the silane can be linked to the one or more first substituents and one or more second substituents that each exclude both a poly(alkylene oxide) moiety and a cyclic carbonate moiety. | 05-31-2012 |
20140342244 | ELECTROLYTE INCLUDING SILANE FOR USE IN ELECTROCHEMICAL DEVICES - The electrolyte includes one or more salts and a silane. The silane has a silicon linked to one or more first substituents that each include a poly(alkylene oxide) moiety or a cyclic carbonate moiety. The silane can be linked to four of the first substituents. Alternately, the silane can be linked to the one or more first substituents and one or more second substituents that each exclude both a poly(alkylene oxide) moiety and a cyclic carbonate moiety. | 11-20-2014 |
20140356735 | NITRILE-SUBSTITUTED SILANES AND ELECTROLYTE COMPOSITIONS AND ELECTROCHEMICAL DEVICES CONTAINING THEM - Described herein are liquid, organosilicon compounds that including a substituent that is a cyano (—CN), cyanate (—OCN), isocyanate (—NCO), thiocyanate (—SCN) or isothiocyanate (—NCS). The organosilicon compounds are useful in electrolyte compositions and can be used in any electrochemical device where electrolytes are conventionally used. | 12-04-2014 |
20150037686 | HALOGENATED ORGANOSILICON ELECTROLYTES, METHODS OF USING THEM, AND ELECTROCHEMICAL DEVICES CONTAINING THEM - Described are electrolyte compositions having at least one salt and at least one compound selected from the group consisting of: wherein “a” is from 1 to 3; “b” is 1 or 2; 4≧“a”+“b”≧2; X is a halogen; R can be alkoxy or substituted alkoxy, among other moieties, and R | 02-05-2015 |
20150221986 | SYMMETRICAL AND UNSYMMETRICAL ORGANOSILICON MOLECULES AND ELECTROLYTE COMPOSITIONS AND ELECTROCHEMICAL DEVICES CONTAINING THEM - Described are organosilicon electrolyte compositions having improved thermostability and electrochemical properties and electrochemical devices that contain the organosilicon electrolyte compositions. | 08-06-2015 |
20150270573 | HALOGENATED ORGANOSILICON ELECTROLYTES, METHODS OF USING THEM, AND ELECTROCHEMICAL DEVICES CONTAINING THEM - Described are electrolyte compositions having at least one salt and at least one compound selected from the group consisting of: | 09-24-2015 |
Patent application number | Description | Published |
20100324310 | Catalytic Conversion of Cellulose to Liquid Hydrocarbon Fuels by Progressive Removal of Oxygen to Facilitate Separation Processes and Achieve High Selectivities - Described is a method to make liquid chemicals, such as functional intermediates, solvents, and liquid fuels from biomass-derived cellulose. The method is cascading; the product stream from an upstream reaction can be used as the feedstock in the next downstream reaction. The method includes the steps of deconstructing cellulose to yield a product mixture comprising levulinic acid and formic acid, converting the levulinic acid to γ-valerolactone, and converting the γ-valerolactone to pentanoic acid. Alternatively, the γ-valerolactone can be converted to a mixture of n-butenes. The pentanoic acid so formed can be further reacted to yield a host of valuable products. For example, the pentanoic acid can be decarboxylated yield 1-butene or ketonized to yield 5-nonanone. The 5-nonanone can be hydrodeoxygenated to yield nonane, or 5-nonanone can be reduced to yield 5-nonanol. The 5-nonanol can be dehydrated to yield nonene, which can be dimerized to yield a mixture of C | 12-23-2010 |
20120149922 | CATALYTIC CONVERSION OF CELLULOSE TO LIQUID HYDROCARBON FUELS BY PROGRESSIVE REMOVAL OF OXYGEN TO FACILITATE SEPARATION PROCESSES AND ACHIEVE HIGH SELECTIVITIES - Described is a method to make liquid chemicals. The method includes deconstructing cellulose to yield a product mixture comprising levulinic acid and formic acid, converting the levulinic acid to γ-valerolactone, and converting the γ-valerolactone to pentanoic acid. Alternatively, the γ-valerolactone can be converted to a mixture of n-butenes. The pentanoic acid can be decarboxylated yield 1-butene or ketonized to yield 5-nonanone. The 5-nonanone can be hydrodeoxygenated to yield nonane, or 5-nonanone can be reduced to yield 5-nonanol. The 5-nonanol can be dehydrated to yield nonene, which can be dimerized to yield a mixture of C | 06-14-2012 |
20140094618 | CATALYTIC CONVERSION OF CELLULOSE TO LIQUID HYDROCARBON FUELS BY PROGRESSIVE REMOVAL OF OXYGEN TO FACILITATE SEPARATION PROCESSES AND ACHIEVE HIGH SELECTIVITIES - Described is a method to make liquid chemicals. The method includes deconstructing cellulose to yield a product mixture comprising levulinic acid and formic acid, converting the levulinic acid to γ-valerolactone, and converting the γ-valerolactone to pentanoic acid. Alternatively, the γ-valerolactone can be converted to a mixture of n-butenes. The pentanoic acid can be decarboxylated yield 1-butene or ketonized to yield 5-nonanone. The 5-nonanone can be hydrodeoxygenated to yield nonane, or 5-nonanone can be reduced to yield 5-nonanol. The 5-nonanol can be dehydrated to yield nonene, which can be dimerized to yield a mixture of C | 04-03-2014 |