A New Soft Switching Flyback-forward Pwm Dc-dc Converter
نویسنده
چکیده
This paper presents a new soft switching flyback-forward PWM converter. The proposed circuit employs an auxiliary circuit to achieve soft switching condition for switches and also absorbs the voltage spikes caused by the leakage inductance of transformers in the converter. In the proposed converter main switch operates at ZVS and the auxiliary switch operates at ZCS. The proposed converter has some advantages such as the low output current ripple, sharing power between the magnetic elements and work at high power levels, soft switching condition in the both turn on and off switch. Soft switching condition is satisfied for both step-up (boost) and step-down (buck) in the proposed converter. Furthermore this converter has a high efficiency and low voltage stress. The converter is controlled by PWM. KeywordsZero Current Switching (ZCS), Zero Voltage Switching (ZVS), Soft Switching, and PWM.
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