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Resonant DC link inverter with series auxiliary circuit on DC bus(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2016年04
Page:
27-33
Research Field:
Publishing date:

Info

Title:
Resonant DC link inverter with series auxiliary circuit on DC bus
Author(s):
WANG Qiang SHAN Rui-xiang WANG Tian-shi LIU Xiao-qin SUN Hai-jun HAN Xiao-guang

( College of Information and Control Engineering,Liaoning Shihua University,Fushun 113001,China)
Keywords:
inverter soft-switching zero voltage switching resonant series
PACS:
TM 464
DOI:
10. 15938 / j. emc. 2016. 04. 004
Abstract:
A novel resonant DC link soft-switching inverter was proposed to realize a inverter which has a simple topology,an easy control strategy,high efficiency and high power density. Series auxiliary resonant unit on the DC bus was added to DC link of conventional inverter to make DC-bus voltage decrease to zero periodically,which realized zero-voltage operation of all switching devices in inverter. Furthermore,the switching device in the auxiliary resonant unit could be turned on under zero-current and turned off under zero-voltage. In addition,because only one auxiliary switch was in the auxiliary resonant unit,cost of hard-ware was lower. Commutation process of the circuit and design rule were analyzed. The mathematical mod-el for auxiliary resonant circuit loss was established and the influence of resonant parameters on the loss of auxiliary circuit was discussed. A 1 kW laboratory prototype was built. The experimental results demonstrat that soft-switching operation of all switching devices can be realized. Therefore,the soft-switching inverter presented can effectively reduce switching loss and improve efficiency.

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Last Update: 2016-06-26