| CPC B60L 53/22 (2019.02) [H02P 27/06 (2013.01); B60L 2210/40 (2013.01); H02J 2310/48 (2020.01)] | 19 Claims |
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1. A motor drive system, configured to drive a motor that uses a power battery pack as a power supply, wherein the power battery pack comprises at least two battery modules that are independent of each other, the motor drive system comprising a vehicle control unit, a primary controller, at least two secondary controllers, at least two direct current-alternating current (DC-AC) circuits, and the battery modules correspond to the DC-AC circuits;
each battery module is connected to an input end of one of the DC-AC circuits, and an output end of each DC-AC circuit is connected to a corresponding winding of the motor;
the DC-AC circuit is configured to convert a direct current provided by the corresponding battery module into an alternating current to drive the corresponding winding of the motor;
each one of the DC-AC circuits corresponds to one secondary controller; and
when it is determined that a battery module is faulty, the vehicle control unit is configured to use the primary controller to send a disable instruction to the secondary controller corresponding to the faulty battery module so that the secondary controller receiving the disable instruction controls a corresponding one of the DC-AC circuits to stop working.
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