Patent application number | Description | Published |
20130279213 | POWER REGENERATION APPARATUS AND POWER CONVERSION APPARATUS - A power regeneration apparatus includes a power conversion unit, an AC reactor, a voltage detecting unit, a phase detecting unit, a drive control unit for controlling the power conversion unit based on a phase detection value, and a reactive current component detecting unit. The phase detecting unit detects the phase of the AC power supply. The reactive current component detecting unit detects a reactive current component of a current. The drive control unit includes a phase correction section. The phase correction section corrects the phase detection value based on the reactive current component. | 10-24-2013 |
20130279214 | POWER REGENERATIVE CONVERTER AND POWER CONVERSION APPARATUS - A power regenerative converter includes: a power conversion unit configured to convert AC power supplied from an AC power supply into DC power and convert DC power into AC power to be supplied as regenerative electric power to the AC power supply supply; an LCL filter including a reactor unit having a plurality of reactors connected in series between the power conversion unit and the AC power supply, and capacitors each having one end connected to a series connection point of the reactors in the reactor unit; a drive control unit for controlling the power conversion unit based on an AC voltage command; and a voltage command compensation unit for calculating a compensation value in accordance with a capacitor voltage being a voltage at the series connection point of the reactors and adding the compensation value to the AC voltage command input to the drive control unit. | 10-24-2013 |
20140125261 | CONTROLLER OF AC MOTOR - A controller of an AC motor includes a d-axis voltage command section to generate a d-axis voltage command on a d axis of a d-q coordinate system. A d-axis non-interactive control section removes, from the d-axis voltage command, an interference component resulting from a current on a q axis of the system. A first current deviation arithmetic section obtains a deviation between a current command on the q axis and the current on the q axis flowing through the AC motor. A q-axis integral control section outputs an integral value of the deviation. A q-axis voltage command section generates a q-axis voltage command based on the deviation. A constant output control section outputs a correction voltage command based on the integral value. A d-axis voltage command correction section subtracts the correction voltage command from the d-axis voltage command after non-interactive control to correct the d-axis voltage command. | 05-08-2014 |
20150115864 | MOTOR CONTROL APPARATUS AND METHOD FOR CONTROLLING MOTOR - A motor control apparatus includes a voltage regulator to execute a voltage increase mode to increase a voltage applied to an induction motor from a lower limit of a first range over time. A frequency regulator executes a frequency decrease mode to decrease a frequency of the voltage from an upper limit of a second range over time. When a current through the motor exceeds a first threshold in the voltage increase mode, a mode changer changes the mode to the frequency decrease mode. When the current through the motor becomes smaller than a second threshold in the frequency decrease mode, the mode changer changes the mode to the voltage increase mode to control the motor to change from a free running state to a state in which the voltage and the frequency satisfy a relationship. A determinator determines whether the voltage and the frequency satisfy the relationship. | 04-30-2015 |
20150115865 | MOTOR CONTROL APPARATUS AND METHOD FOR CONTROLLING MOTOR - A motor control apparatus includes a voltage regulator to execute a voltage increase mode to increase a voltage applied to an induction motor from a lower limit of a first range over time. A frequency regulator executes a frequency decrease mode to decrease a frequency of the voltage from an upper limit of a second range over time. The frequency regulator limits decrease of the frequency when a bus voltage of a bus exceeds a first threshold in the frequency decrease mode. The bus supplies DC power to an inverter to drive the motor. A mode changer alternatively changes the voltage increase mode and the frequency decrease mode to control the motor to change from a free running state to a state in which the voltage and the frequency satisfy a relationship. The determinator determines whether the voltage and the frequency satisfy the relationship. | 04-30-2015 |
Patent application number | Description | Published |
20090140688 | Inverter Device - This invention provides an inverter device that can detect a step-out state of an AC motor by a simple process without depending on a rotation speed of the AC motor and also surely hold an abnormal state in the step-out state of the AC motor. The inverter device | 06-04-2009 |
20100079103 | ALTERNATING-CURRENT MOTOR CONTROL APPARATUS - An alternating-current motor control apparatus includes a stator frequency computing unit configured to compute a stator frequency of a motor magnetic flux; a torque error computing unit configured to compute a torque error by using the motor magnetic flux, an estimated current, and a motor current; and a speed estimator configured to estimate a speed of the alternating-current motor by using the stator frequency and the torque error. The speed estimator includes a proportional controller configured to reduce the torque error to zero, and an adaptive filter configured to eliminate a high-frequency component of the torque error. | 04-01-2010 |
20100085006 | CONTROL DEVICE FOR INDUCTION MOTOR - A control device includes a slip calculator that calculates a first slip frequency of an induction motor, a current detector that detects motor current that passes through the induction motor, an adder that calculates a primary frequency by adding a speed command and a second slip frequency that are given, a command voltage generation unit that generates first command voltage from the primary frequency, a voltage error observer unit that estimates a command voltage error from the first command voltage and the motor current, a slip correction unit that calculates a slip correction amount from the command voltage error, an adder that calculates the second slip frequency by adding the first slip frequency and the slip correction amount, and a voltage error correction unit that corrects the first command voltage using the command voltage error and outputs second command voltage. | 04-08-2010 |
20140049202 | MOTOR CONTROL APPARATUS AND MOTOR CONTROL METHOD - A motor control apparatus according to the embodiment includes a rotational position estimating unit, a change amount estimating unit, and an inductance estimating unit. The rotational position estimating unit estimates a rotational position of a rotor from a motor parameter including a q-axis inductance of a motor on a basis of an output current to the motor and a voltage reference. The change amount estimating unit estimates a change amount of an output torque with respect to a current phase change of the motor corresponding to a high frequency signal whose frequency is higher than a drive frequency of the motor. The inductance estimating unit estimates an inductance value that obtains a maximum torque on a basis of the change amount as the q-axis inductance. | 02-20-2014 |
20140292237 | MOTOR CONTROL APPARATUS AND MAGNETIC-POLE POSITION ESTIMATING METHOD - A motor control apparatus according to an embodiment includes a power conversion unit and a control unit. The power conversion unit supplies power to a motor having salient pole characteristic. The control unit performs proportional-integral control on the deviation between a current reference and a current flowing into the motor to generate a voltage reference, and controls the power conversion unit on the basis of the voltage reference. The control unit estimates the magnetic-pole position of a rotor of the motor on the basis of a high-frequency current flowing into the motor by controlling the power conversion unit, and corrects the estimated magnetic-pole position on the basis of an integrated value of the proportional-integral control. | 10-02-2014 |
20140346984 | MAGNETIC POLE POSITION ESTIMATING APPARATUS FOR ELECTRIC MOTOR, CONTROLLING APPARATUS FOR ELECTRIC MOTOR, AND MAGNETIC POLE POSITION ESTIMATING METHOD FOR ELECTRIC MOTOR - A controlling apparatus for an electric motor according to an embodiment includes a superposed component generator, an inverter, a current detector, and a magnetic pole position estimator. The superposed component generator generates, at a predetermined cycle, a superposed voltage reference of which vector is shifted by 90 degrees with respect to that of a superposed voltage reference previously generated, in a coordinate system that is set to a stator of the electric motor. The inverter outputs a driving voltage that is based on a driving voltage reference superposed with the superposed voltage reference to the electric motor. The current detector detects currents flowing into respective phases of the electric motor, and outputs the detected currents. The magnetic pole position estimator detects the magnetic pole position of the electric motor based on an amount of change in the detected currents at the predetermined cycle. | 11-27-2014 |
Patent application number | Description | Published |
20080213164 | Method for producing hydrogen peroxide - The present invention provides a method for producing hydrogen peroxide, comprising the steps of: alternately reducing and oxidizing a working solution containing anthraquinone compounds as a reaction medium, wherein a mixture of alkyl-substituted anthraquinones and alkyl-substituted tetrahydroanthraquinones in a molar ratio of from 2:1 to 8:1 is used as the anthraquinone compounds in the working solution, in the reduction step all of the tetrahydroanthraquinones and some or all of the anthraquinones in the working solution are reduced; and keeping the content of alkyl-substituted anthrahydroquinones in the working solution after the reduction step and before the oxidation step higher than the content of alkyl-substituted tetrahydroanthrahydroquinones, wherein ethylanthraquinone and ethyltetrahydroanthraquinone are used as anthraquinone compounds in the working solution in a total proportion of both of from 10 to 45 mol % of all of the anthraquinone compounds in the working solution. | 09-04-2008 |
20090018013 | Method for producing regeneration catalyst for working solution usable for hydrogen peroxide production - The present invention is directed to a method for producing a regeneration catalyst for a working solution usable for producing hydrogen peroxide by an anthraquinone method, wherein active alumina is treated with a 20% by weight to saturated aqueous solution of a magnesium salt, treated with ammonia and then burned; and is also directed to a regeneration catalyst produced by the method. | 01-15-2009 |
20090169469 | Process for Hydrogen Peroxide Production Including Step for Regeneration of Working Solution - Provided is a provides a method for producing hydrogen peroxide, comprising a step of reducing and then oxidizing a working solution containing an organic solvent, anthraquinone having an alkyl substituent, and tetrahydroanthraquinone having an alkyl substituent to produce hydrogen peroxide; and a working solution regeneration step of removing an inert substance, generated as a sub product by the production of hydrogen peroxide, from the working solution and re-circulating the working solution deprived of the inert substance back into the step of producing hydrogen peroxide; wherein the working solution regeneration step includes i) a first distillation step of recovering the organic solvent by distillation performed at an atmospheric or a lower pressure; and ii) a second distillation step of, following the first distillation step, recovering the anthraquinone and the tetrahydroanthraquinone by distillation performed at a still lower pressure at 200° C. or higher for a residence time of 1 hour or longer. | 07-02-2009 |
Patent application number | Description | Published |
20080212137 | IMAGE FORMING DEVICE AND CONTROL METHOD THEREFOR - An image forming device includes a control unit configured to control by sorting common setting information valid among a plurality of devices and specific setting information valid for a specific device, an internal storage device configured to store setting data that includes a pair of setting data of identification information indicating a type of setting item and setting values, an external storage device controller configured to control to input and output the setting data with a detachable external storage device, and a selective-write device configured to select and write the setting data read from the external storage device based on the predetermined criteria. | 09-04-2008 |
20080259393 | IMAGE FORMING APPARATUS AND RECORDING MEDIUM - An image forming apparatus, including a plurality of applications each including a reception unit configured to receive print data, a determination unit configured to analyze the print data received by the reception unit to determine the data format thereof, and a print control unit configured to print an image of print data having a specific data format. The print data analyzed by the determination unit is sent to the print control unit when the data format is determined to be equivalent to the specific data format, or another reception unit when the data format is determined to be different from the specific data format. | 10-23-2008 |
20090190164 | Method and apparatus for forming image - In an image forming apparatus, a setting management unit acquires at least one of first setting data and second setting data. The first setting data is information that specifies data to be included in the identification image from among the identification data and the second setting data is information that specifies a position of the identification image. An output control unit outputs (e.g., prints) output data including the identification image that is created based on at least one of the first setting data and the second setting data that is acquired by the setting management unit. | 07-30-2009 |
20090296161 | Image forming apparatus, print processing method, and recording medium - An image forming apparatus to print an image on a recording medium based on print data. The image forming apparatus includes a storing unit to store the print data, an image processing unit to perform image processing on image data included in the print data; a printing operation specification unit to specify implementation of a printing operation; a marking unit to embed marking data in the image data, a marking printing operation specification unit to specify implementation of a marking printing operation, a printing operation implementation unit to implement the printing operation or the marking printing operation, a print data determination unit to determine whether or not the print data includes a setting for the marking printing operation, and a printing operation change unit to change a printing operation performed by the printing operation implementation unit. | 12-03-2009 |
20090310182 | METHOD AND APPARATUS FOR FORMING IMAGE AND RECORDING MEDIUM - One or more among a PC document receive filter, a FAX document receive filter, a read filter, and a readout filter create a report on each of the corresponding functions in a format common to the functions. A report filter changes a format of the created report as desired by the user. Therefore, when a setting for a report output process is changed, it is not necessary to change the setting with respect to each of the functions. Thus, it is possible to reduce development man-hours for the report output process. | 12-17-2009 |
20110007353 | IMAGE FORMING APPARATUS AND COMPUTER READABLE MEDIUM - A disclosed image forming apparatus includes a filter detection part that detects the filter when the external medium is connected; a filter identification information obtaining part that obtains filter identification information that identifies a filter set by a user from filter setting information when print data subject to printing is received, wherein the filter setting information regarding the filter is added to the print data; a first output part that outputs the print data to the filter via the input/output interface, in accordance with the filter identification information; an input part that inputs the print data on which a predetermined process has been carried out by the filter via the input/output interface; and a second output part that outputs the print data on which the predetermined process has been carried out by the filter to a page description language module. | 01-13-2011 |
Patent application number | Description | Published |
20120147396 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND COMPUTER PROGRAM PRODUCT - An image forming apparatus includes a printer engine, a storage unit, a print data interpreting unit, and a print control unit. The print data interpreting unit interprets print data and identifies both a first job type and a second job type. The first job type specifies any one of a special print job using special toner and a normal job using normal toner, and the second job type specifies a print function to be used. The print control unit makes a decision to permit or prohibit accumulation of print data in view of security based on the first job type and the second job type, accumulates the print data in the storage unit when the decision to permit the accumulation of the print data is made, and prohibits the accumulation of the print data when the decision to prohibits the accumulation of the print data is made. | 06-14-2012 |
20130010319 | IMAGE FORMING SYSTEM, OUTPUT MANAGEMENT METHOD, AND PROGRAM PRODUCT - An image forming system includes an image forming apparatus and an output management server. The output management server includes a receiving unit to receive an output data, an analysis unit to analyze the output data and determine a PDL required for outputting the output data, a management unit to determine whether the PDL is available, and a transmitting unit to transmit the output data and an executable file of the PDL to the designated image forming apparatus, when the PDL is determined as available. The image forming apparatus includes a receiving unit to receive the output data and the executable file of the PDL, a control unit to activate the executable file of the PDL and develop the output data, an output unit to output the output data, and a deleting unit to delete the executable file of the PDL, after the outputting of the output data is completed. | 01-10-2013 |
20130107288 | IMAGE FORMING APPARATUS, IMAGE FORMING SYSTEM, IMAGE DATA PROCESSING METHOD, PROGRAM, AND STORAGE MEDIUM | 05-02-2013 |
Patent application number | Description | Published |
20090108117 | Seat belt retractor - A seat belt retractor including a spool for winding up a seat belt; and a locking mechanism having a locking member that rotates together with the spool in the normal state, but is prevented from rotating in a belt withdrawing direction in the event of an emergency, generating a rotational difference relative to the spool. The spool further including an energy absorbing pin that is disposed on the spool and the locking member to limit the load applied to the seat belt when the rotational difference is generated between the spool and the locking member. The energy absorbing pin has a shaft portion that is fitted in a hole of the spool and a head portion that is in contact with the locking member. The head portion comprises a curved contact surface to be in contact with the locking member. | 04-30-2009 |
20110140501 | SEAT BELT RETRACTOR AND SEAT BELT APPARATUS INCLUDING THE SAME - To allow a seat belt retractor to be easily assembled and to be made compact while effectively operating a pretensioner and an energy absorbing mechanism. A plurality of balls | 06-16-2011 |
20110140502 | SEAT BELT RETRACTOR AND SEAT BELT APPARATUS INCLUDING THE SAME - To effectively operate a pretensioner using a plurality of balls and an energy absorption mechanism, to simplify the structure of an exhaust passage in the pretensioner, and to facilitate the working process of the exhaust passage. A pretensioner | 06-16-2011 |
20120248847 | SEAT BELT RETRACTOR AND SEAT BELT APPARATUS INCLUDING THE SAME - [Object] To provide a retractor that is manufacturable at a much lower cost by making a pretensioner operate more effectively, by minimizing the length of a pipe so that a weight reduction is realized effectively, and by easing the restriction for the shape of a guide member. [Solution] A pipe | 10-04-2012 |