This paper analyzed the Neutral Point Excursion method(NPEM)of PWM control with Cascaded Multi-cell Multi-Level Inverter.
本文介绍了级联多单元高压变频器使用中点漂移法解决单元故障时提高输出电压的方法。
Based on this, the thesis also researches PWM control methods of multi-level inverter and introduces the carrier PWM method of three-level inverter in detail.
在此基础上，研究了多电平逆变器的各种PWM控制方法，并对三电平逆变器的载波pwm方法进行了详细介绍。
The topology and modulation method of high-power inverter is introduced. Described the implementation principle of multi-level inverter with cascaded H bridge based on 2-level control technique.
论文首先对多电平逆变器发展前景进行概述，介绍了大功率逆变器的拓扑结构及调制方法。
USS protocol used for communication between PLC and inverter can compensate for the lack of hardware interface converter and could realize multi-level reversible speed.
利用USS协议实现PLC与变频器之间的通信可以弥补变频器硬件接口的不足，能够实现多级正反转调速。
USS protocol used for communication between PLC and inverter can compensate for the lack of hardware interface converter and could realize multi-level reversible speed.
利用USS协议实现PLC与变频器之间的通信可以弥补变频器硬件接口的不足，能够实现多级正反转调速。
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