Abstract– In this paper, a detailed analysis of the zerovoltage and zero-current-switching (ZVZCS) full-bridge PWM converters is performed. The differences of the zero-voltage-switching (ZVS) operation between the conventional ZVS full-bridge PWM converters and the ZVZCS full-bridge PWM converters are analyzed in depth. Circuit parameters that affect the soft-switching conditions are examined a...

The conventional high-frequency phase-shifted zerovoltage-switching (ZVS) full-bridge dc/dc converter has a disadvantage, in that a circulating current flows through transformer and switching devices during the freewheeling interval. Due to this circulating current, rms current stress, conduction losses of the transformer and switching devices are increased. To alleviate this problem, this pape...

In this paper, a new interleaved buck converter with soft-switching is investigated. The condition, zero voltage current switching (ZVZCS) of IGBTs during turn-on obtained the help cell that includes active and passive devices incorporated in (IBC). presence reduces losses improves overall efficiency. achieved ZVZCS turn on operations, while operated under both light heavy loads. principles ope...

A single-stage power-factor-corrected pulsewidth modulation converter with extended load power range is presented. The topology is based on a zero-voltage zero-currentswitched full-bridge (ZVZCS-FB) inverter. Steady-state analysis of the topology shows that by operating the LC load filter in discontinuous mode, the dc-link voltage remains bounded and independent of the load level. Therefore, th...

A novel ZVZCS isolated dual series-resonant active-clamp dc–dc converter is proposed to obtain high efficiency. The proposed converter employs an active-clamp technique, while a series-resonant scheme controls the output voltage with the complementary pulse width modulation controller. The active-clamp circuit serves to recycle the energy stored in the leakage inductance or the magnetizing indu...

A new zero-voltage and zero-current-switching (ZVZCS) full-bridge (FB) pulsewidth modulation (PWM) converter is proposed to improve the performance of the previously presented ZVZCS FB PWM converters. By adding a secondary active clamp and controlling the clamp switch moderately, ZVS (for leading-leg switches) and ZCS (for lagging-leg switches) are achieved without adding any lossy components o...

This paper presents the design and simulation of the zero voltage zero current switched non isolated dcdc boost converter. Many applications powered by batteries need high performance, high step up dc-dc converters. When the converter switches are turned on and off at high frequency to meet dynamic and steady state requirements, the losses add on in the converter. When current through the switc...

A novel zero-voltage and zero-current-switching (ZVZCS) full-bridge pulsewidth modulation converter is presented to simplify the circuits of the previously presented ZVSCS converters. A simple auxiliary circuit, which consists of one small capacitor and two small diodes, is added in the secondary to provides ZVZCS conditions to primary switches, as well as to clamp secondary rectifier voltage. ...

The design and analysis of a compact flyback AC to DC power supply is described and simulation results are presented. Of particular interest is merging two interleaved power converters such that the main switch in one converter behaves as the clamp switch of the other while ripple cancellation is accomplished. Also, PFC and ZVZCS are achieved with no extra components. Using these approaches, th...

An interleaved zero-voltage zero-current switching (ZVZCS) high step-up DC-DC converter is proposed for modern photovoltaic power generation systems. The can achieve voltage conversion gain without operating under extreme duty cycles. be readily adjusted by selecting different numbers of the diode-capacitor multiplier (DCM) cells in circuit at design stage. Moreover, with passive snubber conver...