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公开(公告)号：US11290036B2
公开(公告)日：2022-03-29
申请号：US16975610
申请日：2019-01-17
IPC分类号： H02P29/024 , H02P6/12 , H02P6/16
摘要： An applied voltage decision unit 510 performs in parallel, a process of determining three-phase AC commands V1u* to V1w* of a voltage applied to a motor by an inverter based on a position, of a rotor of a motor, detected by a position sensor with an output A, and a process of determining three-phase AC commands V2u* to V2w* of the voltage applied to the motor by the inverter based on a neutral point voltage VN of the motor. A PWM modulator 507 alternately outputs a PWM signal according to the three-phase AC commands V1u* to V1w* and a PWM signal according to the three-phase AC commands V2u* to V2w* to the inverter. A control device determines whether or not the position sensor with the output A has failed by comparing the position, of the rotor, detected by the position sensor with the output A with a position, of the rotor, estimated from a neutral point voltage VN of the motor.
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公开(公告)号：US11283368B2
公开(公告)日：2022-03-22
申请号：US17057382
申请日：2019-05-14
发明人： Kenta Yamabe , Yoshihiro Tawada , Tomoya Katsukura
IPC分类号： H02M7/493 , H02P29/024 , H02M1/12 , H02M1/32 , H02P27/06
摘要： An open phase detection system for a power conversion system includes a phase difference abnormality detection unit, an amplitude difference abnormality detection unit, and an open phase determination unit. The phase difference abnormality detection unit outputs a phase difference abnormality signal when an absolute value of a phase difference between a current flowing through a reactor and a current flowing through a capacitor is equal to or smaller than a phase threshold value. The amplitude difference abnormality detection unit outputs an amplitude difference abnormality signal when an absolute value of a value based on an amplitude difference between the current flowing through the reactor and the current flowing through the capacitor is equal to or smaller than an amplitude threshold value. The open phase determination unit outputs an open phase signal when receiving inputs of both the phase difference abnormality signal and amplitude difference abnormality signal.
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公开(公告)号：US20220082624A1
公开(公告)日：2022-03-17
申请号：US17398703
申请日：2021-08-10
IPC分类号： G01R31/34 , H02P29/024
摘要： A method for operating a separately excited electric motor, which includes a rotor and a stator, includes the following: determining an electrical characteristic variable of the rotor and an electrical characteristic variable of the stator, calculating an initial setpoint voltage value for the stator based on a setpoint current value, a measured current value, and the determined electrical characteristic variables of the rotor and the stator, checking, based on the calculated initial setpoint voltage value, whether there is an electrical fault, in particular a shorted coil, at the rotor, and providing a fault message and/or disconnecting the electric motor if a fault has been identified.
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公开(公告)号：US11260829B2
公开(公告)日：2022-03-01
申请号：US16482536
申请日：2018-01-31
申请人： DENSO CORPORATION
发明人： Yuta Doi
摘要： A wiper motor control circuit carries out control in which a driving circuit generates, and supplies to a wiper motor, a voltage that eliminates deviation between a target speed and an actual speed of an output shaft. In a case in which a state in which the deviation between the target speed and the actual speed is greater than or equal to a predetermined threshold value continues for a predetermined time or more, the wiper motor control circuit carries out control that lowers the target speed and in which the driving circuit generates, and supplies to the wiper motor, a voltage that eliminates deviation between the lowered target speed and the actual speed of the output shaft.
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公开(公告)号：US20220060136A1
公开(公告)日：2022-02-24
申请号：US17298751
申请日：2019-11-22
申请人： Nidec Corporation
发明人： Kaori NABESHI , Takashi KITAMURA
IPC分类号： H02P29/024 , H02P27/06
摘要： A power converter converts power from a power source into power to be supplied to a motor having n-phase (n is an integer of 3 or larger) windings. The power converter includes an inverter including switches connected to the windings, a controller to control operation of each of the switches, and a failure detector to detect a sign of failure in a drive system ranging from the power source to the motor. When a sign of failure is detected by the failure detector, the controller is configured or programmed to check presence or absence of a failure in the drive system while supplying power to the motor by causing the inverter to perform a failure operation.
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86.发明授权公开(公告)号：US11251740B2
公开(公告)日：2022-02-15
申请号：US16021563
申请日：2018-06-28
申请人： DENSO CORPORATION
发明人： Takashi Suzuki , Daisuke Kobayashi , Masaya Taki
IPC分类号： H02P29/024 , H02P27/12 , B62D5/04 , H02P21/22 , H02P25/22
摘要： A current sensor state determination device determines that an abnormality is caused in a current sensor when a sum of phase currents based on current detection values from each of the current sensors in three phases is greater than a first determination value, and determines that no abnormality is caused in the current sensor when the sum of phase currents is equal to or less than the first determination value. The state determination device determines that the current sensor is normal when it is determined that (i) no abnormality is caused in a preset electric angle range equal to or less than one electric-angle cycle of the rotating electric machine and (ii) a value of an electric current flowing in the rotating electric machine in a rotating coordinates system calculated based on the current detection value is equal to or greater than a second determination value.
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公开(公告)号：US11251739B2
公开(公告)日：2022-02-15
申请号：US16876643
申请日：2020-05-18
IPC分类号： H02P1/00 , H02P29/024 , H02P27/08 , B60L15/20 , B60L53/20 , H02M7/5387
摘要： A vehicle driving device includes an inverter which drives a motor. The inverter includes: a three-phase bridge circuit including a plurality of switching elements; a three-phase short circuit which short-circuits three phases of the motor via the three-phase bridge circuit; and a control circuit. The control circuit includes: a microprocessor which drives the three-phase bridge circuit; a malfunction notification circuit which outputs a malfunction notification signal when the microprocessor is malfunctioning; and a latch circuit which holds the malfunction notification signal outputted from the malfunction notification circuit. The control circuit outputs a three-phase short-circuit drive signal which drives the three-phase short circuit, based on the malfunction notification signal held by the latch circuit.
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公开(公告)号：US11251727B2
公开(公告)日：2022-02-15
申请号：US16961780
申请日：2018-04-27
摘要： The electric motor control device includes a rotation angle correction amount calculation unit that, based on a rotation angle signal for an alternating current electric motor output from an angle sensor and a current detection signal for the alternating current electric motor output from a detector, calculates a rotation angle correction amount to correct a rotation angle error between the rotation angle signal and a magnetic pole position of the alternating current electric motor, wherein the rotation angle correction amount calculation unit, based on a current detection signal when a short circuit is caused between winding terminals of the alternating current electric motor, calculates at least either one rotation angle correction amount of a direct current component rotation angle correction amount and an alternating current component rotation angle correction amount.
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公开(公告)号：US11248966B2
公开(公告)日：2022-02-15
申请号：US16437371
申请日：2019-06-11
申请人： ROLLS-ROYCE plc
发明人： Mohamed H. M. Sathik , Rejeki Simanjorang , Chandana J. Gajanayake , Sundararajan Prasanth , Amit K. Gupta
摘要： A system, method and machine-readable instructions for monitoring a power electronics device. The system involves a semiconductor device, at least one sensor and a processor. The processor is configured to monitor a junction temperature of the semiconductor device by determining from the at least one sensor an on-state resistance of the semiconductor device and calculating the junction temperature of the semiconductor device according to a relationship between the on-state resistance of the semiconductor device and the junction temperature of the semiconductor device. The processor may apply an ageing coefficient to the on-state resistance.
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90.发明授权公开(公告)号：US11237021B2
公开(公告)日：2022-02-01
申请号：US16085668
申请日：2016-04-28
发明人： Tatsuya Mori , Isao Kezobo , Munenori Yamamoto , Akira Furukawa
IPC分类号： G01D5/244 , H02P29/024 , G01R31/42 , G01R35/00 , H02P27/06
摘要： Provided are a failure determination device and method for a rotating machine control device, which are capable of detecting failure of a sensor configured to detect a rotational position of a rotating machine while the rotating machine is in operation. A rotation angle estimator calculates a rotation angle estimation value. A relationship between the rotation angle estimation value (θest), and a first angle detection value (θ1) and a second angle detection value (θ2), which are obtained from output signals of angle sensors configured to detect a rotational position of a rotating machine, is monitored while the rotating machine is in operation. In this manner, failure of the angle sensors, which are configured to detect the rotational position of the rotating machine, can be always detected even while the rotating machine is in operation.
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