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公开(公告)号：US11894786B2
公开(公告)日：2024-02-06
申请号：US17858864
申请日：2022-07-06
发明人： Xiong Zheng , Xianxi Pan , Yu Luo , Zhimin Dan
CPC分类号： H02P21/05 , H02P6/10 , H02P21/22 , H02P2207/05
摘要： This application provides a permanent-magnet synchronous machine control method and device, and a permanent-magnet synchronous machine control system. The method includes: obtaining a d-axis current id and a q-axis current iq in a permanent-magnet synchronous machine control loop at a current moment; obtaining a fifth-order harmonic current id5th and a seventh-order harmonic current id7th in the d-axis current id in the permanent-magnet synchronous machine control loop at the current moment, and a fifth-order harmonic current iq5th and a seventh-order harmonic current iq7th in the q-axis current iq in the permanent-magnet synchronous machine loop at the current moment; determining a d-axis current idk+1 at a next moment in each switch state; determining a q-axis current iqk+1 at the next moment in each switch state based on the first current idk, the second current iqk, and the second voltage in each switch state; and determining a control policy of the permanent-magnet synchronous machine.
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公开(公告)号：US11689143B2
公开(公告)日：2023-06-27
申请号：US17858862
申请日：2022-07-06
发明人： Xiong Zheng , Xianxi Pan , Zhimin Dan , Hong Wang
IPC分类号： H02P27/08 , H02M7/5395
CPC分类号： H02P27/08 , H02M7/5395 , H02K2213/03
摘要： This application provides an electric motor control method and device, a system, and an electric vehicle. The method includes: obtaining an input power and an output power of an electric motor; calculating a loss power based on the input power and the output power; determining a target d-axis current of the electric motor, where the target d-axis current is calculated by a calculation module based on the loss power, the calculation module includes a tracking differentiator, and the calculation module operates in a controller; and determining a duty ratio based on the target d-axis current and a preset q-axis current, and inputting the duty ratio into an inverter so that the inverter drives, based on the duty ratio, the electric motor to operate.
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公开(公告)号：US20230130303A1
公开(公告)日：2023-04-27
申请号：US18085490
申请日：2022-12-20
发明人： Xiaojian Huang , Zhimin Dan , Xianxi Pan , Xiyang Zuo
摘要： The embodiments of the present disclosure provide a control method, a device, a power system, and an electric vehicle. The method is applied to a motor controller of the power system. The power system further includes a power battery, a motor, and an inverter. The method includes: sending a first control signal to the inverter when a cell temperature of the power battery satisfies a preset heating condition for the power battery; where the first control signal is configured to control the inverter to convert an electricity provided by the power battery into an alternating current with a frequency changing randomly, and the alternating current with the frequency changing randomly is configured to supply power to the motor.
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公开(公告)号：US20230049854A1
公开(公告)日：2023-02-16
申请号：US17858857
申请日：2022-07-06
发明人： Xiong ZHENG , Xianxi Pan , Feilong CAl , Zhimin Dan
摘要： Embodiments of this application provide a torque obtaining method and device, a motor controller, and a readable storage medium. The torque obtaining method includes: obtaining a rotation speed of a motor; obtaining a current of the motor; obtaining a flux linkage of the motor; determining an electromagnetic torque of the motor based on the current and the flux linkage; and inputting the rotation speed and the electromagnetic torque into a preset status observer, and obtaining an observed value of an actual output torque of the motor, where the observed value is output by the status observer. The obtaining method is intended to obtain the actual output torque effectively, simply, and accurately.
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公开(公告)号：US20230411734A1
公开(公告)日：2023-12-21
申请号：US18459392
申请日：2023-08-31
发明人： Xiaojian Huang , Xianxi Pan , Zhimin Dan
IPC分类号： H01M10/657 , H01M10/615 , H01M10/42 , H01M10/625 , H01M10/63 , B60L58/27
CPC分类号： H01M10/657 , H01M10/615 , H01M10/4264 , H01M10/625 , H01M10/63 , B60L58/27 , H01M2220/20 , B60L50/64
摘要： Provided are a battery heating device and a control method and circuit therefor, and a power device. The battery heating device includes: a heating module including a first bridge arm, a second bridge arm, and an energy storage element; and a control module configured to control the first bridge arm and the second bridge arm, to form a circuit for discharging from a first battery cell to the energy storage element and a circuit for charging from the energy storage element and the first battery cell to a second battery cell, and/or to form a circuit for discharging from the second battery cell to the energy storage element and a circuit for charging from the energy storage element and the second battery cell to the first battery cell, for heating of the first battery cell and the second battery cell.
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公开(公告)号：US11418143B2
公开(公告)日：2022-08-16
申请号：US17529917
申请日：2021-11-18
发明人： Xiaojian Huang , Zhimin Dan , Xianxi Pan , Xiyang Zuo
摘要： The present application provides a control method, an apparatus, a power system, and an electric vehicle, relating to the field of electric vehicles. The method includes: obtaining a battery cell temperature of a power battery, and sending a first control signal to an inverter when the battery cell temperature meets a preset power battery heating condition, where the first control signal is configured to control the inverter to convert a current provided by the power battery into an alternating current with a randomly changing frequency, and the alternating current with a randomly changing frequency is configured to supply power to a permanent magnet motor. New frequency components may be introduced to evenly distribute originally concentrated radial electromagnetic forces to an entire stator, thereby reducing vibration noises during the heating process of the power battery.
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