AC drive system has become the mainstream electronic control system of large mining dump trucks. This article analyzes the electric drive constitution, motor structure, PWM technology of 830E truck, the frequency speed system of truck, and illustrates the advantages and features of PWM inverter system.%交流电传动系统已成为大型矿用自卸卡车的主流电控系统，从830E卡车电传动组成、电机结构、PWM技术进行分析，对矿用卡车的变频系统进行分析，说明PWM变频系统的优点和特点。
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