Conducted EMI reduction of PWM inverter for AC motor drive systems

Issue title: ICMIT'03

Article type: Research Article

Authors: Kim, Lee-Hun^a | Yu, Jae-Sung^a | Lee, Won-Cheol^a | Won, Chung-Yuen^a | Hahm, Nyon-Kun^b | Kim, Gyu-Sik^c

Affiliations: [a] School of Information & Computer Engineering, SungKyunKwan University, Suwon, 440-746, Korea | [b] IN-TECH FA Co., Ltd | [c] The University of Seoul, Korea

Abstract: Much attention has been given to EMI problems generated in variable speed AC drive systems. Zero switching states of PWM inverter generate large common mode voltage. This paper focuses on the voltage modulation in order to mitigate common mode voltage. It shows that the common mode voltage can be reduced much more by choosing the PWM switching method in which each carrier wave is 120 degrees out of phase. To demonstrate the practical significance of our results, we presented some simulation and experimental results.

Keywords: EMI, common mode voltage, voltage modulation method, carrier wave

DOI: 10.3233/JAE-2006-803

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 24, no. 3-4, pp. 195-207, 2006