An improved zero-voltage-transition technique in a single-phase power factor correction circuit

Abstract

This paper presents an improved Zero-Voltage-Transition Technique (ZVT-Technique) in a single-phase active power factor correction circuit based on a dc-dc boost converter topology and operated in a continuous-inductor-current mode with fixed-switching frequency control. An additional circuit for reducing the turn-off switching loss of the auxiliary switching circuit was applied. Experimental work was carried out with a circuit operated at 220 V rms input voltage, 400 V dc output voltage, 500 W output power and 40 kHz switching frequency. The test results showed that the efficiency was improved from 95 to 97%t with the proposed circuitry, while the power factor was constant.

Plan and analysis of synchronous buck converter for UPS application

“…This in-turn increases the efficiency of the converter by 5% or high [5]. Many switching techniques were discussed but very few were implemented for high power applications [6][7][8][9]. ZVS switching technique, a method of soft switching has given better performance [10][11][12].…”

A Novel Soft-Switching Synchronous Buck Converter for Portable Applications

“…So in this paper, we have optimized the efficiency of the synchronous buck converter by eliminating switching losses using soft-switching technique. The voltage-mode softswitching method that has attracted most interest in recent years is the zero-voltage transition [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. This is because of its low additional conduction losses and because its operation is closest to the PWM converters.…”