A Modified Equivalent Circuit for Common-Mode Current of Single-Phase Full-Bridge Inverters

Author

Zhang, Kai ; Zhou, Yunbin ; Zhang, Yonggao ; Kang, Yong

Author_Institution

Huazhong Univ. of Sci. & Technol., Wuhan

fYear

2006

fDate

6-10 Nov. 2006

Firstpage

2867

Lastpage

2872

Abstract

A modified equivalent circuit for common-mode (CM) current of single-phase full-bridge inverters is proposed. The circuit allows application of superposition theorem, and it provides more insights into the propagation mechanism of the CM noise. Simulations and experiments are conducted on an inverter test setup to validate the proposed circuit. Three operation conditions are studied: (1) with one of the two legs detached from the DC bus; (2) with that leg installed back in place but not switching; (3) with normal unipolar PWM switching of both the two legs. Based on the proposed equivalent circuit and measured parameters from the test setup, simulations with MATLAB software predicted the CM current both in time and frequency domains with reasonable precision

Keywords

PWM invertors; bridge circuits; equivalent circuits; frequency-domain analysis; switching convertors; time-domain analysis; MATLAB software; common-mode current; equivalent circuit; normal unipolar PWM switching; propagation mechanism; single-phase full-bridge inverters; superposition theorem; time-frequency domains; Circuit noise; Circuit simulation; Circuit testing; Current measurement; Equivalent circuits; Frequency measurement; Leg; Pulse width modulation; Pulse width modulation inverters; Software measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on

Conference_Location

Paris

ISSN

1553-572X

Print_ISBN

1-4244-0390-1

Type

conf

DOI

10.1109/IECON.2006.347561

Filename

4153143