为解决水泵三相AC 660 V电机在DC 750~1 250 V下的供电及起动问题,通过开展电机驱动系统设计研究,形成了以两电平主电路结构、电压空间矢量脉冲宽度调制技术和电压/频率恒定控制策略为基础的水泵电机逆变变频控制方案。在方案中针对较宽输入直流电压范围下的输出交流电压控制技术进行了攻关并取得了突破,形成了相应关键技术解决方案。通过水泵负载试验,全面验证了该方案的有效性和可行性。

Since the power system was varying from DC 750 to 1 250 V, a power conversion system was designed to solve the power supply to a 660 V AC three-phase pump motor. In the system, a two-level frequency conversion inverter was adopted which was based on space vector pulse width modulation and V/F control. During the research, a key technology was developed which focuses on the DC input, varying in a wide range, converting into the AC output and the solution was proposed. This solution was verified by load experiments and proved to be effective and reliable.

TM 301.2