A modified two-level three-phase quasi-soft-switching inverter

Author

Yusheng Liu ; Weimin Wu ; Blaabjerg, Frede ; Chung, Henry Shu-Hung

Author_Institution

Dept. of Electr. Eng., Shanghai Maritime Univ. Shanghai, Shanghai, China

fYear

2014

fDate

16-20 March 2014

Firstpage

261

Lastpage

267

Abstract

A traditional Voltage Source Inverter (VSI) has higher efficiency than a Current Voltage Source (CSI) due to the less conduction power loss. However, the reverse recovery of the free-wheeling diode limits the efficiency improvement for the silicon devices based hard-switching VSI. The traditional quasi-soft-switching inverter can alternate between VSI and CSI by using a proper control scheme and thereby reduce the power losses caused by the reverse recovery of the free-wheeling diode. Nevertheless, slightly extra conduction power loss of the auxiliary switch is also introduced. In order to reduce the extra conduction power loss and the voltage stress across the DC-link capacitor, a modified two-level three-phase quasi-soft-switching inverter is proposed by using a SiC MOSFET instead of an IGBT. The principle of the modified two-level three-phase quasi-soft-switching inverter is analyzed in detail. And the performance is verified through simulations and experiments on a 5 kW/380 V three-phase prototype.

Keywords

elemental semiconductors; invertors; power MOSFET; semiconductor diodes; DC-link capacitor; extra conduction power loss reduction; free-wheeling diode reverse recovery; modified two-level three-phase quasi-soft-switching inverter; power 5 kW; silicon carbide MOSFET; silicon device based hard-switching VSI; voltage 380 V; voltage source inverter; voltage stress reduction; Equivalent circuits; Inductors; Inverters; Power generation; Switches; Zero current switching; Zero voltage switching; CSI; Efficiency; Operation principle; Quasi-Soft-Switching Inverter; Shoot-through; VSI;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE

Conference_Location

Fort Worth, TX

Type

conf

DOI

10.1109/APEC.2014.6803319

Filename

6803319