CPC B60L 15/08 (2013.01) [B60L 3/0092 (2013.01); B60L 50/40 (2019.02); B60L 50/66 (2019.02); H02M 1/008 (2021.05); H02M 3/1582 (2013.01); H02P 27/08 (2013.01); B60L 2210/12 (2013.01)] | 18 Claims |
1. A motor control system, comprising a positive direct current bus, a negative direct current bus, three phases of inverter bridges, a bus capacitor, an upper gate drive circuit, a lower gate drive circuit, a first power supply unit, and a second power supply unit, wherein:
the three phases of inverter bridges are connected to a motor, the positive direct current bus and the negative direct current bus are respectively connected to a positive terminal and a negative terminal of the bus capacitor, and each phase of inverter bridge comprises an upper bridge arm connected to the positive direct current bus and a lower bridge arm connected to the negative direct current bus;
the first power supply unit is connected to three upper bridge arms in the three phases of inverter bridges through the upper gate drive circuit, wherein the first power supply unit comprises a first power source conversion unit and a first power source, an input terminal of the first power source conversion unit is connected to the first power source, and an output terminal of the first power source conversion unit is connected to the upper gate drive circuit; and
the second power supply unit is connected to three lower bridge arms in the three phases of inverter bridges through the lower gate drive circuit, wherein the second power supply unit comprises a second power source conversion unit and a second power source, an input terminal of the second power source conversion unit is connected to the second power source, and an output terminal of the second power source conversion unit is connected to the lower gate drive circuit.
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