STEP-UP/STEP-DOWN ZVZCS PWM DC–DC CONVERTER WITH ACTIVE CLAMPING

Step up dcdc converter pdf

Zvzcs Pwm Dc-dc Converter with Controlled Output Rectifier

A new zero-voltage zero-current switching (ZVZCS) full-bridge phase-shifted PWM converter with controlled output rectifier is presented in this paper. Zero-voltage turn-on and zero-current turn-off for all power switches of the inverter is achieved for full load range from no-load to short circuit by using new secondary energy recovery clamp and modified PWM control strategy. Moreover by adding...

Active-Clamping Quad-Flyback Converter

An active-clamping quad-flyback converter is proposed to achieve zero voltage switching (ZVS) for all power switches. The secondary sides of quad-flyback converter are connected in parallel to share the load current. Thus, the transformer copper losses and the conduction losses on the output diodes are reduced. Activeclamping part including one auxiliary switch and one clamp capacitor can relea...

Zvzcs Pwm Dc-dc Converter with Controlled Secondary Rectifier for Arc Welding

A zero-voltage, zero-current switching (ZVZCS) PWM DC-DC power converter with secondary active rectifier tested as a dc current source for arc welding is described in this paper. The soft switching DC-DC converter consists of high frequency inverter, high frequency power transformer and controlled output rectifier with new secondary energy recovery turn-off snubber. Circulating current in the c...

Analysis, Design and Implementation of an Improved ZVZCS-PWM Forward converter

Abstract – In this paper an Improved Zero Voltage Zero Current Pulse Width Modulation Forward converter which employs a simple resonance snubber circuit is introduced. A simple snubber circuit consists of a capacitor, an inductor and two diodes. In proposed converter, switch Q1 operates at ZCS turn-on, and ZVS turn-off conditions and all-passive semiconductor devices operate at ZVZCS turn-on an...