a new output structure for class e power amplifier (pa) is proposed in this paper. a series lc resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. this resonator causes low impedance at the second harmonic. the output circuit is designed to shape the switch voltage of the class e amplifier and lower the voltage stress of the transistor. t...

High efficiency DC-DC converters with high-voltage gain have been researched due to increasing demands. A soft-switching single-ended primary inductor converter (SEPIC) is presented in this work. An auxiliary switch and a clamp capacitor are presented in this project. A coupled inductor and an auxiliary inductor are utilized to obtain ripple-free input current and achieve zero voltage-switching...

The purpose of this paper is to introduce a new family of zero-voltage switching (ZVS) pulse-width modulation (PWM) active-clamping dc-to-dc boost converters. This technique presents ZVS commutation without additional voltage stress and a significant increase in the circulating reactive energy throughout the converters. So, the efficiency and the power density become advantages when compared to...

In this paper is introduced a new family of DC-DC PWM converters using a true Zero Current and Zero Voltage Transition (ZCZVT) commutation cell. The soft-switching technique utilized provides Zero Current Switching (ZCS) and Zero Voltage Switching (ZVS) simultaneously, at both turn-on and turn-off of the main switch and ZVS for the main diode. The family of ZCZVT PWM converters is obtained from...

This paper presents implementations of a nonisolated, high voltage gain DC-DC converter. High voltage gain is achieved due to inclusion of resonance and transformer in the circuit. The performance of this converter is compared with two similar topologies namely coupled inductor-switched capacitor step-up converter and coupled inductor step-up converter. The proposed prototype is designed using ...

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...

In this paper, a soft-switching single-ended-primary-inductance converter (SEPIC) with multi-output sources is proposed. The proposed SEPIC has the following advantages: (1) The conversion efficiency can be increased. To incorporate a soft-switching cell with a flyback-type, the power switches can achieve zero-voltage-switching (ZVS) and zero-current-switching (ZCS) features under turn-on trans...

As the demand for the telecom/server power is growing exponentially, the need for higher power density increases each year. Increasing power density relies on less component counts, smaller reactive component size, and/or better system efficiency. Higher switching frequency leads to the smaller reactive and filter component size. Better efficiency, which reduces the heat sink or paralleled devi...

This paper proposes a load-independent inverse class-E zero-voltage switching (ZVS) inverter. The proposed inverter achieves the constant output current and ZVS at any load resistance without control. waveforms design equations of are shown. Besides, wireless-power-transfer system was implemented using designed WPT kept voltage against variations, which denoted effectiveness validities analytic...

This paper presents a novel high step-down DC-DC converter based on switched-capacitor resonant topology. It is presented in 48/8 V version, which was verified by simulations and experiments. The most notable features specific to this are an almost non-iductive design relatively low voltage stress across switching devices. proposed topology allows for zero-current-switching (ZCS) zero-voltage-s...