XU Zheng1, JIN Li jun1, LIN Xiu jian2, Yang lin2, Zhang Sheng meng2

(1. College of Electronics and Infomution Engineering, Tongji University, Shanghai 201804, China;

2. Zhejiang guanhua Electric Co., Ltd., Yueqing 325606, China)

 

Abstract: Aiming at the over voltage phenomenon at motor terminal in long distance PWM driving system, the theory of output reactor suppressing over voltage was researched, inductance of output reactor, cable length and load impendence characteristics was chosen as orthogonal test factors, and a mathematical model of the over voltage peak was constructed through orthogonal test design. The formula of inductance of output reactor was proposed based on the model. The results indicate that the over voltage can be effectively suppressed by output reactor designed through the formula, the error between simulation in PSPICE and design requirement is 1.5%. The work can provide theoretical support for the design of output reactor.

Key words: PWM pulse; long cable; output reactor; over voltage; orthogonal test design;