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Energies 2017, 10(4), 530; doi:10.3390/en10040530

Design and Evaluation of an Efficient Three-Phase Four-Leg Voltage Source Inverter with Reduced IGBTs

1
Shenzhen Research Institute, City University of Hong Kong, Nanshan District, Shenzhen 518057, China
2
School of Energy and Environment, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China
3
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
*
Author to whom correspondence should be addressed.
Academic Editor: José Gabriel Oliveira Pinto
Received: 4 January 2017 / Revised: 3 April 2017 / Accepted: 10 April 2017 / Published: 13 April 2017
(This article belongs to the Special Issue Power Electronics and Power Quality)
View Full-Text   |   Download PDF [3697 KB, uploaded 15 April 2017]   |  

Abstract

This paper presents a new three-phase four-leg voltage source inverter (VSI), which achieves a high cost effectiveness for mega-watt level system applications. The proposed four-leg inverter adopts the integrated topology with thyristors and insulated-gate bipolar transistors (IGBTs), which aims to reduce the number of IGBTs. In order to handle the zero sequence current, a neutral leg via incorporating IGBTs is artfully integrated with the regular phase legs. Furthermore, the modelling principles are elaborated and analyzed, which emphasizes switching states and voltage vectors in six segments based on the states of thyristors. Finally, by using the carrier-based pulse width modulation (PWM) method, the closed-loop current control of the proposed inverter is verified by both simulation and experimentation. View Full-Text
Keywords: power inverter; voltage source inverter; four-leg inverter; cost-effectiveness; current control; pulse width modulation power inverter; voltage source inverter; four-leg inverter; cost-effectiveness; current control; pulse width modulation
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Luo, Y.; Liu, C.; Yu, F.; Lee, C.H. Design and Evaluation of an Efficient Three-Phase Four-Leg Voltage Source Inverter with Reduced IGBTs. Energies 2017, 10, 530.

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