Suppression of high frequency leakage current in PWM Inverter-Fed Induction Motor Drives using Active Common Mode Voltage Damper

능동형 커먼 모드 전압 감쇄기를 통한 유도 전동기의 고주파 누설전류 억제

This paper propose a "Active common-mode voltage damper circuit" that capable of a suppression of a common-mode voltage produced in the PWM VSI. The four level half-bridge PWM inverter circuit and common-mode transformer are incorporated into the "Active common-mode voltage damper" the design method of which is presented Effect of "Active common-mode voltage damper" in this paper verifies a propriety and effectiveness in 2.2[kW] induction motor drive using IGBT inverter. Experimental results show that "common-mode voltage damper" makes contributions to reducing a high frequency leakage current and common-mode voltage.leakage current and common-mode voltage.