Patent ID: 10608571

Abstract:
The present invention discloses an open-winding motor drive topology and a modulation method thereof. Each bridge arm includes an upper bridge arm power switching device and a lower bridge arm power switching device, an upper node of the upper bridge arm power switching device is connected to a DC bus voltage, a lower node of the lower bridge arm power switching device is connected to a power ground, and a lower node of the upper bridge arm power switching device and an upper node of the lower bridge arm power switching device are connected as an output node of the bridge arm; the output node of the first bridge arm is connected to a left node of a A-phase stator winding of the open-winding motor, the output node of the second bridge arm is connected to a right node of the A-phase stator winding and a left node of a B-phase stator winding of the open-winding motor, the output node of the third bridge arm is connected to a right node of the B-phase stator winding and a left node of a C-phase stator winding of the open-winding motor, and the output node of the fourth bridge arm is connected to a right node of the C-phase stator winding of the open-winding motor. The invention improves the power density of the drive, thereby ensuring the working performance of the motor.