CPC H02P 27/08 (2013.01) [H01M 10/4264 (2013.01); H01M 10/46 (2013.01); H02J 7/345 (2013.01); H02M 1/32 (2013.01); H02M 7/5387 (2013.01); B60R 16/03 (2013.01); H01M 2220/20 (2013.01); H02J 2207/20 (2020.01)] | 13 Claims |
1. An energy conversion apparatus, comprising:
a battery;
a motor inverter, having a first terminal and a second terminal respectively connected to a first end and a second end of the battery, and comprising an upper bridge arm and a lower bridge arm;
a first switch module including at least one first switch connected between the first terminal of the motor inverter and the first end of the battery or the second terminal of the motor inverter and the second end of the battery;
a motor winding having a first end connected to the motor inverter;
a second switch module having a first end connected to a second end of the motor winding;
a first capacitor having a first end connected to the second switch module and a second end connected to the second terminal of the motor inverter;
a second capacitor having a first end connected to the first terminal of the motor inverter and a second end connected to the second terminal of the motor inverter; and
a controller coupled to the first switch module and motor inverter and configured to control the first switch module to be off to disconnect the battery from the second capacitor and the motor inverter, and control the motor inverter to release energy stored in the first capacitor and the second capacitor when the second switch module is on by:
1) Controlling the upper bridge arm of the motor inverter to be on, so that the second capacitor charges the first capacitor;
2) Controlling the upper bridge arm to be off, and controlling the lower bridge arm of the motor inverter to be on and off alternately, so as to release energy stored in the charged first capacitor; and
repeating steps of 1) and 2) until a voltage of the second capacitor is lower than a preset voltage.
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