公开(公告)号：US20220329184A1

公开(公告)日：2022-10-13

申请号：US17764038

申请日：2020-08-18

Applicant: BYD COMPANY LIMITED

Inventor： Yubo LIAN ,  Heping LING ,  Jicheng LI ,  Hua PAN ,  Li MOU

IPC: H02P21/14 ,  B60L58/10

Abstract: A cooperative control method for an energy conversion apparatus is disclosed. The cooperative control method includes: acquiring a target heating power, a target driving power, and a target charging and discharging power; acquiring a first heating power of a motor coil according to the target charging and discharging power; acquiring a second heating power of the motor coil according to the target driving power; adjusting a first quadrature axis current and a first direct axis current to a target quadrature axis current and a target direct axis current when a difference between a sum of the first heating power and the second heating power and the target heating power is not within a preset range, to cause the difference between the sum of the first heating power and the second heating power and the target heating power to be within the preset range; and acquiring a sampling current value on each phase coil and a motor rotor position, and calculating a duty cycle of each phase bridge arm in a reversible pulse width modulation (PWM) rectifier.

公开(公告)号：US20220085746A1

公开(公告)日：2022-03-17

申请号：US17416853

申请日：2019-12-17

Applicant: BYD COMPANY LIMITED

Inventor： Yubo LIAN ,  Heping LING ,  Hua PAN ,  Feiyue XIE ,  Lijun ZHANG

IPC: H02P27/08 ,  H02P29/62 ,  H02J7/00

Abstract: The present disclosure discloses a motor drive apparatus, a method for controlling the same, a vehicle, and a readable storage medium, where the control method includes: obtaining a required heating power and a required charging power; and adjusting a current value and direction of each phase current of a three-phase motor based on the required heating power, the required charging power, and an output of the motor at a zero torque, to simultaneously control a process of charging a power battery by a power supply module, the torque of the three-phase motor at a zero output, and a three-phase inverter and the three-phase motor to heat a heat exchange medium flowing through at least one of the three-phase inverter or the three-phase motor.

公开(公告)号：US20220080858A1

公开(公告)日：2022-03-17

申请号：US17416884

申请日：2019-12-20

Applicant: BYD COMPANY LIMITED

Inventor： Yubo LIAN ,  Heping LING ,  Hua PAN ,  Yuxin ZHANG ,  Hao CHEN

IPC: B60L58/27 ,  B60L3/00

Abstract: This application provides a vehicle and a power battery heating apparatus and method thereof. In the power battery heating method, when a current temperature value of a power battery is lower than a preset temperature value, and a heating condition of the power battery meets a preset condition, a three-phase inverter is controlled to cause a three-phase alternating current motor to generate heat according to heating energy to heat a coolant flowing through the power battery. A preset quadrature-axis current that causes a torque value outputted by the motor to be an appropriate value is obtained, and a corresponding preset direct-axis current is obtained according to heating power of the power battery, to control, according to the preset direct-axis current and the preset quadrature-axis current, the three-phase inverter to adjust a phase current of the three-phase alternating current motor in the heating process, so that electromagnetic torque with a relatively small torque value is outputted at a motor shaft. The electromagnetic torque cannot cause the vehicle to move, also cannot cause a damage to parts and components of a transmission mechanism of the vehicle. It only causes the motor output shaft to output a pre-tightening force to the transmission mechanism, thereby eliminating an engagement gap and effectively avoiding jitter of the vehicle.