摘要
介绍了SHE(selectedharmonicelimination)PWM控制技术用于交流传动机车的优越性 ,求出了变量个数给定后SHEPWM数学模型的多组解 ,研究了这些解的电机谐波电流抑制特性。在实验中 ,用SHEPWM消除了逆变器输出电压的 34种低次谐波。
The advantages of the selected harmonic elimination (SHE) PWM technique for ac traction drives are described, which include the mitigation of the electromagnetic interference and a notable reduction in the size of the dc link filters. Using the Newton Raphson method, the nonlinear SHE equations have been solved up to 35 degrees of freedom and the multiple solutions have been obtained. These multiple solutions are then evaluated by a performance index which reflects the ratio of the harmonic current to the fundamental current in the motor. The evaluation shows that among the multiple solutions there exists an optimal solution which results in the minimum harmonic current. In the experiment as many as 34 kinds of the lower order harmonics have been eliminated by the SHEPWM technique from the output voltages of the inverter.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2001年第9期47-52,共6页
Proceedings of the CSEE
基金
浙江省自然科学基金资助项目 ( 5 0 0 12 3)
关键词
牵引逆变器
最优脉宽调制
交流传动机车
电磁兼容性
铁路
electric inverters for railroad traction
optimal pulsewidth modulation
ac traction drives
high power motion control systems
