十二相同步电动机对交-交变频调速系统谐波的改善

Improvement on Harmonic Status of the Variable Speed System with Cycloconverter-fed 12 Phase Synchronous Motor

在给出十二相交-交变频器输出谐波电压的基础上,对交-交变频十二相同步电动机调速系统四"Y"综合d,q电压谐波进行了推导,结果表明,四"Y"d,q电压谐波可以互相抵消,使得d轴和谐波电压为零、q轴和谐波电压中仅含有幅值很小的少数次谐波,进一步对电流谐波、电磁转矩谐波的分析证明这种电压谐波抵消作用对改善交-交变频十二相同步电动机的谐波特性具有良好的效果.仿真和试验结果验证了理论推导的正确性.

On the basis of achieving 12-phase cycloconverter output harmonic voltage, the four ＂Y＂ integrated.voltage harmonics of the variable speed system with cycloconverter fed 12 phase synchronous motor are derived which denotes the voltage harmonics of four ＂Y＂ windings that can be bucked each other and make the axis harmonic voltage zero, the axis one only have much less harmonics with little amplitude. A further analysis on current harmonics and electromagnetic torque harmonic proves the good effect of this voltage harmonics bucking action on improving the harmonic character of variable speed system with cycloconverter fed 12-phase synchronous motor. The simulating and experimental results validate the correctness of theoretic analysis.