A single-phase resonant snubber inverter with fixed timing control for a UPS

Author

Yu, Qinghong ; Nelms, R.M.

Author_Institution

Dept. of Electr. & Comput. Eng., Auburn Univ., AL, USA

Volume

4

fYear

2003

fDate

15-19 June 2003

Firstpage

1633

Abstract

In a UPS, the output voltage of a single-phase inverter is filtered with an LC filter to provide a sinusoidal output voltage. Since this inverter has an inductive load like an inverter for a motor drive, topologies for ZVS inverters utilized for motor drives can also be applied in the UPS application. A single-phase resonant snubber inverter (RSI) for application in a UPS has been developed. Analysis of the RSI in a normalized state plane provided insight into the operation of this ZVS inverter. Based on this analysis, fixed timing control based on the direction of the current flowing through the inductor in the output filter was implemented to control the auxiliary switches in a prototype RSI. The direction of the inductor current was sensed using a secondary winding on the output filter inductor. Experimental results are provided for a 1 kW prototype RSI in a UPS.

Keywords

filters; inductors; resonant invertors; snubbers; switching convertors; timing; uninterruptible power supplies; 1 kW; LC filter; RSI; UPS; ZVS inverters; auxiliary switches; fixed timing control; inductive load; inductor current; motor drive; single-phase resonant snubber inverter; sinusoidal output voltage; Filters; Inductors; Inverters; Motor drives; Prototypes; Resonance; Snubbers; Timing; Uninterruptible power systems; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual

ISSN

0275-9306

Print_ISBN

0-7803-7754-0

Type

conf

DOI

10.1109/PESC.2003.1217702

Filename

1217702