单元串联叠加型高压电机变频器的设计

The Design of Frequency Inverter with Overlying Series Units for High Voltage Motors

针对高压变频器对电网和用电设备产生电磁污染的问题,采用单元串联的方法,设计了一种新型拓扑结构的高压变频器.实际运行证明:新型的高压变频器通过电压矢量种类的增加,能输出谐波低的高压交流电,供给普通异步电动机做调速驱动,而且对电网产生的不良影响可以忽略.

To solve the problem that high voltage frequency inverter has pollution to electric network and electric equipments, a method of series units was adopted to design a frequency inverter having a new topological structure. Practical operation shows that the harmonics of its output alternating current may be ignored by increasing category of output voltage vector because of series unites and it can be applied in common motors for variable speed driving, also avoid pollution to electric network and other electric equipment.