公开(公告)号：EP3992020A1

公开(公告)日：2022-05-04

申请号：EP20835108.0

申请日：2020-06-18

Applicant: BYD Company Limited

Inventor： XU, Luhui ,  DU, Zhiyong ,  WAN, Jiawei ,  LI, Caiwen

IPC: B60L53/22 ,  B60L53/24 ,  H02J7/02 ,  H02J7/00

Abstract: An energy conversion apparatus, a power system, and a vehicle are provided. The energy conversion apparatus includes a motor coil (11) and a bridge arm converter (12). The bridge arm converter (12) is connected to an external battery (200) and an external charging port (10). The motor coil (11) is connected to the external charging port (10), and the motor coil (11) includes a plurality of phase windings, each phase winding includes N coil units, first ends of the N coil units of each phase winding are connected together and then connected to a corresponding phase bridge arm of the plurality of phase bridge arms, and second ends of coil units in each phase winding are connected to second ends of corresponding coil units in other phase windings and then selectively connected to the charging port (10).

公开(公告)号：EP2473863B1

公开(公告)日：2015-10-14

申请号：EP10811297.0

申请日：2010-08-29

Applicant: BYD Company Limited

Inventor： TANG, Xiaohua ,  DU, Zhiyong ,  ZHOU, Yongzhuang ,  XIA, Cong ,  CHENG, Lipin ,  MA, Hui

IPC: G01R31/34 ,  G01R19/145 ,  H02H3/13 ,  H02H7/09 ,  G01R31/02 ,  H02P6/12

CPC classification number: H02H7/09 ,  G01R31/026 ,  G01R31/343 ,  H02P29/0243

公开(公告)号：EP4342716A1

公开(公告)日：2024-03-27

申请号：EP22875050.1

申请日：2022-09-29

Applicant: BYD Company Limited

Inventor： XU, Luhui ,  XU, Xiangshuai ,  REN, Shaopeng ,  DU, Zhiyong

IPC: B60L15/20 ,  B60L58/27 ,  B60H1/14

Abstract: A method and an apparatus for controlling heating of an electric drive system of a vehicle, a heating system, and a vehicle are provided. The electric drive system includes a motor controller and a motor. The method includes: determining that a vehicle is in a travelling state; obtaining a rotational speed value and a torque control value of the motor and obtaining a carrier instruction value of the motor controller in response to a heating instruction; obtaining a first current instruction value based on the rotational speed value and the torque control value, and obtaining a second current instruction value based on the torque control value and the first current instruction value; adjusting a control signal of the motor controller based on at least one of the second current instruction value and a second carrier frequency; and controlling the motor to operate based on the adjusted control signal, so that the electric drive system generates heat.

公开(公告)号：EP4116721A1

公开(公告)日：2023-01-11

申请号：EP20922644.8

申请日：2020-08-24

Applicant: BYD Company Limited

Inventor： YU, Yilong ,  XU, Luhui ,  DU, Zhiyong ,  QI, Axi ,  YANG, Guangming

IPC: G01R31/34

Abstract: A device and a system for diagnosing a motor parameter are provided. The device includes a master chip, an excitation conditioning circuitry, a motor resolver unit, and a sine and cosine conditioning circuitry. The master chip includes a first analog-to-digital converter, a second analog-to-digital converter, a first processing unit, and a monitoring core.

公开(公告)号：EP4113772A1

公开(公告)日：2023-01-04

申请号：EP21771816.2

申请日：2021-03-17

Applicant: BYD Company Limited

Inventor： XU, Luhui ,  YU, Yilong ,  DU, Zhiyong ,  QI, Axi ,  YANG, Guangming

IPC: H02H7/08

Abstract: A motor control system and a vehicle. The motor control system (1) includes a main control unit (10), a power supply unit (20), and a driving unit (30). The main control unit (10) is configured to: obtain sampling data of a motor and a power supply signal from the driving unit (30), generate a motor control signal according to the sampling data, and output a safety enable signal when determining that motor drive is abnormal according to the sampling data or when determining that power supply to the driving unit (30) is abnormal according to the power supply signal. The power supply unit (20) is configured to: supply power to the main control unit (10), monitor a state of the main control unit (10), and output a safety cut-off signal when the power supply unit (20) or the main control unit (10) is abnormal. The driving unit (30) is configured to: drive the motor according to the motor control signal, and switch to a safe path when receiving any one of the safety enable signal or the safety cut-off signal.

公开(公告)号：EP2901546A1

公开(公告)日：2015-08-05

申请号：EP13842927.9

申请日：2013-09-23

Applicant: BYD Company Limited

Inventor： LUO, Hui ,  DU, Zhiyong ,  ZHOU, Xuguang ,  ZHANG, Xinxin ,  CHEN, Xing ,  YANG, Taotao ,  CHENG, Lipin

IPC: H02P6/00

CPC classification number: H02P6/12 ,  H02P6/34 ,  H02P29/0241

Abstract: A method for checking an out-of-step of a synchronous motor includes detecting three-phase currents of the synchronous motor; determining whether a relationship between the three-phase currents satisfies a preset requirement; and if no, determining that the synchronous motor is out of step. It is determined that the synchronous motor is out of step when amplitudes of each current of the three-phase currents are not equal or when the phase difference between the three-phase currents is not 120°.