电动轿车直流斩波器的研制

Development of DC motor choppers for electric cars

介绍了以双极型晶体管（ＢＪＴ）作主开关器件，用于电动轿车的直流斩波器。由于采用了先进的元件退饱和快速保护技术、低损耗吸收电路结构、最大限流起动控制以及过流、过压、欠压保护等措施，斩波器具有较小的体积、较高的运行效率、较快的启动性能以及高的可靠性。用在ＭＡＺＤＡ改装电动轿车上，试运行情况证明该斩波器性能优良。

This paper describes a special designed and built dc chopper for electric cars. The power switching device is bipolar junction transistor (BJT) module. Advanced techniques including fast protection against desutuaration of BJT and passive low loss snubber circuit configuration, accompanied with maximum starting current control strategy and system protections such as overcurrent, over and under voltage, ensure the chopper to have a small size, light weight, high operation efficiency, fast dynamic response, and high reliability. Test results on a modified MAZDA electric car employing the above described chopper have proved the excellent performances mentioned in this paper.