中文摘要：

为了提高电机驱动系统可靠性,采用三相全控电桥H_PWM_ON_L_ON控制方式来驱动电机转动,通过反电势过零点检测方式分析三相反电动势端电压与中性点的关系,采用功率MOSFET作为开关器件,采用三个IR2101芯片驱动六个复合功率管实现精准换相。采用该驱动系统的无人机空载续航时间与采用常规H桥驱动系统相比提高了20%,该驱动系统可在-25℃的条件下依然稳定运行,响应速率提高10%。

英文摘要：

To enhance the driving system reliable. This article control the motor by three- phase fully- controlled bridge H_PWM_ON_L_ON. Use the principle of back electromotive force zero- crossing testing, the relationship between the floating phase terminal end voltage and midpoint voltage in DC link of three phases ＇ back electromotive force was analyzed. Choice power MOSFET to be the switching devices. Use three IR2101 chip to drive six composite power for realizing the change of phase. The cruising time of unmanned aircraft that using this driving system extended 20 % than the usual H- bridge system. This system can even running stable at- 25 ℃. The response rate of this system enhance 10 %.