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为了改善和提高电动汽车电气驱动系统的性能 ,提出了一种用于电动汽车的高频交流功率驱动系统。该系统由高频谐振逆变器、高频变压器和高频交流脉冲密度调制变频器组成。高频谐振逆变器将电池组的直流电压逆变为 2 0kHz的高频交流信号 ,由高频变压器分配给系统的各个部分 ,采用零电压开关技术的高频交流脉冲密度调制变频器作为变频电源驱动电机 ,推动车辆行驶。研究表明 ,本文提出的高频交流功率驱动系统可以满足电动汽车不同的功率要求 ,具有噪音低、效率高、体积小、重量轻、能量密度高和动态响应快等优点
In order to improve and improve the performance of electric vehicle electric drive system, a high frequency AC power drive system for electric vehicle is proposed. The system consists of high frequency resonant inverter, high frequency transformer and high frequency AC pulse density modulation converter. High-frequency resonant inverter battery DC voltage inverter into 20kHz high-frequency AC signal from the high-frequency transformer assigned to the various parts of the system, using zero-voltage switching technology, high-frequency AC pulse density modulation converter as a variable frequency Power drives the motor to propel the vehicle. The research shows that the high frequency AC power drive system proposed in this paper can meet the different power requirements of electric vehicles with the advantages of low noise, high efficiency, small size, light weight, high energy density and fast dynamic response