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公开(公告)号：US11616461B2
公开(公告)日：2023-03-28
申请号：US17475221
申请日：2021-09-14
发明人： Hiroshi Ota , Hirofumi Omote
摘要： A motor control device according to an embodiment comprises a first signal generator, a second signal generator, a main controller, and a driver. The first signal generator is configured to generate, based on a clock signal indicating a stepping drive cycle of a motor, a first control signal. The second signal generator is configured to generate, based on a command phase indicating a target phase of a rotor of the motor, a second control signal. The main controller is configured to control the first signal generator and the second signal generator to output at least one of the first control signal and the second control signal. The driver is configured to drive the motor based on at least one of the first control signal and the second control signal.
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公开(公告)号：US11611292B2
公开(公告)日：2023-03-21
申请号：US17421918
申请日：2019-08-19
申请人： Hitachi Astemo, Ltd.
发明人： Shigehisa Aoyagi , Toshiyuki Ajima , Kotaro Shiino
摘要： An object of the present invention is to provide a power conversion device including a plurality of inverter circuits connected in parallel to a load, the power conversion device being capable of performing control with a smaller number of microcomputers, having high reliability, and being advantageous for miniaturization and cost reduction. Provided are: a plurality of inverter circuits connected in parallel to a load; a microcomputer which controls the plurality of inverter circuits; a plurality of signal selection units which select a drive signal of each of the plurality of inverter circuits; and a first transmission path and a second transmission path which are connected in parallel between the microcomputer and the plurality of signal selection units and transmit the drive signal of each of the plurality of inverter circuits from the microcomputer to each of the plurality of signal selection units. Each of the plurality of signal selection units selects any one of a first drive signal transmitted from the first transmission path and a second drive signal transmitted from the second transmission path.
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公开(公告)号：US11527979B2
公开(公告)日：2022-12-13
申请号：US17107246
申请日：2020-11-30
申请人： ABB Schweiz AG
摘要： A method of controlling a 3n-phase electrical machine (7) by means of n power converters (3a, 3b) each being controlled by a respective controller, and each power converter (3a, 3b) being configured to power a respective set of three phases of the electrical machine (7), wherein the method for each controller comprises: a) obtaining measured currents (ia,1, ib,1, ic,1, ia,2, ib,2, ic,2) of the set of three phases of the electrical machine (7) controlled by the controller, b) estimating all currents ({circumflex over (ι)}dq, 2, {circumflex over (ι)}dq, 1) of all the other sets of three phases of the electrical machine (7), which are controlled by the other controllers, c) transforming the measured currents (ia,1, ib,1, ic,1, ia,2, ib,2, ic,2) and all the estimated currents ({circumflex over (ι)}dq,2, {circumflex over (ι)}dq,1) using vector space decomposition, VSD, to obtain a set of VSD currents, and d) controlling the corresponding power converter based on the VSD currents.
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公开(公告)号：US11290047B2
公开(公告)日：2022-03-29
申请号：US16337415
申请日：2018-08-31
发明人： Zhuliang Xia , Wei Liu , Xingkun Qin , Huizhong Zhang , Zhantu Liao , Xiaokun Zhao
摘要： The present disclosure relates to a DC bus discharge control method, including that: an active discharge instruction is received; a motor current signal is acquired according to the active discharge instruction; the motor current signal is converted into a current signal in a stator coordinate system; a voltage control signal in the stator coordinate system is output based on the current signal in the stator coordinate system and a random current reference instruction of a preset stator coordinate system; and the voltage control signal in the stator coordinate system is converted into a three-phase voltage control signal, and a working state of a switching device is controlled according to the three-phase voltage control signal.
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公开(公告)号：US11187377B2
公开(公告)日：2021-11-30
申请号：US16192438
申请日：2018-11-15
申请人： Taylor Tools
发明人： Keith Papulski , Thomas P. Karnowka
摘要： An overload control device for use with a floor machine having an electric motor is disclosed. The overload control device can include a power input and a power output connectable to the electric motor. The device can include a load detector, a current sensor operative to sense a current value supplied to the motor via the power output, and a cutoff relay interconnecting the power input and the power output. The cutoff relay being operative to supply power from the power input to the power output when activated, and interrupt power when deactivated. A controller receives a load present indication from the load detector and activates the cutoff relay if a load is present. The controller receives a current value from the current sensor, determines if the current value is greater than a threshold value, and deactivates the cutoff relay when the current value is greater than the threshold value.
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公开(公告)号：US11028723B1
公开(公告)日：2021-06-08
申请号：US16691435
申请日：2019-11-21
摘要： A system includes a gas turbine engine, a generator coupled with the gas turbine engine, and controller circuitry. The generator may be rotatable by the gas turbine engine to generate electric power on a load bus. The controller circuitry may control the load bus to manage an output torque of the gas turbine engine in accordance with a load demand present on the generator. The controller circuitry may dynamically alternate supply of electric power from the load bus to a first load and a second load to maintain operational transient parameters of the gas turbine engine within a predetermined range.
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公开(公告)号：US20210156274A1
公开(公告)日：2021-05-27
申请号：US16691435
申请日：2019-11-21
摘要： A system includes a gas turbine engine, a generator coupled with the gas turbine engine, and controller circuitry. The generator may be rotatable by the gas turbine engine to generate electric power on a load bus. The controller circuitry may control the load bus to manage an output torque of the gas turbine engine in accordance with a load demand present on the generator. The controller circuitry may dynamically alternate supply of electric power from the load bus to a first load and a second load to maintain operational transient parameters of the gas turbine engine within a predetermined range.
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公开(公告)号：US10913444B2
公开(公告)日：2021-02-09
申请号：US16141583
申请日：2018-09-25
申请人： Deere & Company
发明人： Guozhen Zhou , Long Wu , Kent D. Wanner , Sean West
摘要： An improved power system architecture for a hybrid electric vehicle includes a power control unit including a motor inverter, a generator inverter, and a DC-to-DC converter, and vehicle power management (VPM) circuitry directly connected to each of the motor inverter, generator inverter, and DC-to-DC converter. In this arrangement, communication timing is greatly reduced, thereby allowing for feedforward control of the motor inverter, generator inverter, and DC-to-DC converter. The feedforward control enables the VPM circuitry to predict current influx or draw by a motor and determine the corresponding currents to provide to or from the generator and battery prior to or simultaneously with the actual current influx or draw by the motor. This improves vehicle dynamics and responsiveness, as well as enables complete recapture of braking currents and eliminates the need for a brake chopper resistor, thereby improving overall vehicle efficiency.
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公开(公告)号：US10826419B2
公开(公告)日：2020-11-03
申请号：US16088027
申请日：2017-03-15
申请人： NTN CORPORATION
发明人： Masaji Haneda
摘要： A brake device for an AC generator, whose speed can be flexibly controlled, and can function properly even when functions of the control unit are lost.
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公开(公告)号：US10804831B2
公开(公告)日：2020-10-13
申请号：US16254327
申请日：2019-01-22
申请人： DENSO CORPORATION
发明人： Naoto Kobayashi
摘要： In a magnetic flux variation estimator of a control apparatus, a command voltage corrector corrects d- and q-axis command voltages to reduce a deviation between each of the d- and q-axis command voltages and a corresponding actual voltage to be applied to a rotary electric machine, thus outputting a corrected d-axis command voltage and a corrected q-axis command voltage. A standard voltage calculator calculates, based on an electrical angular velocity of the rotary electric machine and a current flowing in the rotary electric machine, a d-axis standard voltage and a q-axis standard voltage to be applied to the rotary electric machine while the rotary electric machine is in a predetermined standard state. An estimator estimates a magnetic flux variation as a function of the corrected d-axis command voltage, the corrected q-axis command voltage, and the q-axis standard voltage.
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