Abstract: When a voltage phase of an ith-phase rectifier circuit of the three-phase rectifier circuit precedes a current phase of the ith-phase rectifier circuit by a first angle, the controller controls a switch of the ith-phase rectifier circuit to be turned on within a second angle after a voltage of the ith-phase rectifier circuit reaches a zero crossing point, where the second angle is greater than or equal to the first angle; and when the current phase of the ith-phase rectifier circuit of the three-phase rectifier circuit precedes the voltage phase of the ith-phase rectifier circuit by the first angle, the controller controls the switch of the ith-phase rectifier circuit to be turned on within a third angle before the voltage of the ith-phase rectifier circuit reaches the zero crossing point, where the third angle is greater than or equal to the first angle.

Abstract: This application relates to a motor controller applied to an electric vehicle, a microprocessor in the motor controller, and a sampling trigger method applied to the microprocessor. The sampling trigger method includes: a signal generation module generates an exciting fundamental wave signal to drive the resolver to work; a signal processing module determines an exciting symbol based on the exciting fundamental wave signal, where the exciting symbol includes alternate high-level signals and low-level signals, and the signal processing module further determines a zero crossing point signal of the exciting fundamental wave signal based on the exciting symbol; and a phase shift processing module performs phase shift processing on the zero crossing point signal to obtain a sampling trigger signal, to trigger the microprocessor to sample the resolver feedback signal. In this solution, fewer peripheral circuits of a chip are used, thereby improving a product integration degree.

Abstract: This application relates to a motor controller applied to an electric vehicle, a microprocessor in the motor controller, and a sampling trigger method applied to the microprocessor. The sampling trigger method includes: a signal generation module generates an exciting fundamental wave signal to drive the resolver to work; a signal processing module determines an exciting symbol based on the exciting fundamental wave signal, where the exciting symbol includes alternate high-level signals and low-level signals, and the signal processing module further determines a zero crossing point signal of the exciting fundamental wave signal based on the exciting symbol; and a phase shift processing module performs phase shift processing on the zero crossing point signal to obtain a sampling trigger signal, to trigger the microprocessor to sample the resolver feedback signal. In this solution, fewer peripheral circuits of a chip are used, thereby improving a product integration degree.

Abstract: A power conversion circuit includes: an AC-DC circuit, a direct current-alternating current DC-AC circuit, and a first filter capacitor. The DC-AC circuit includes: a third bridge arm, a fourth bridge arm, a first inductor, a second inductor, a first switch transistor, and a second switch transistor, a second end of the first inductor is connected to a first end of the first switch transistor, a second end of the first switch transistor is connected to the direct current bus, a first end of the second inductor is connected to a connection point of two switch transistors included by the fourth bridge arm, a second end of the second inductor is connected to a first end of the second switch transistor, and a second end of the second switch transistor is connected to the direct current bus.