变频运行的谐波分析

The Analysis of Harmonic in Variable Frequency Operation

通过对变频器运行的谐波分析，说明了直接输出型多重化变频器可以减小某些次数的谐波，但要根除特定次数的谐波，还需要通过变压器或电机耦合技术。

By use of Fourier analyais of harmonic in inverter operation, the output harmonic component ofdirect in parallel with multiple inverter is decreased. To eliminate certain harmonic, multial inverter combi-nation with polyphase electric machine or transformer should be adopted.