A Class-E/Fodd high power amplifier (PA) using the distributed active transformer (DAT) is demonstrated at 29MHz. The DAT combines the output power from four VDMOS push-pull pairs. The zero voltage switching (ZVS) condition is investigated and modified for the Class-E/Fodd amplifier with a non-ideal output transformer. All lumped elements including the DAT and the transistor package are modeled...

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 proposes two modulation schemes for Dual Active Bridge (DAB) converters, with the aim of maximizing Zero Voltage Switching (ZVS) operation over a wide operational range. The first is ZVS-optimized constant frequency scheme, constructed based on boundary conditions ZVS operation. scheme maximizes number events across broad range and easy to implement. Additionally, variable proposed, ...

The isolated three-level DC/DC converter (ITLDC) can be used to charge electric vehicles. During the constant current charging stage, ITLDC designed realize nature zero voltage switching (ZVS). However, during is small; thus, ZVS cannot realized. This paper presents an active commutation auxiliary circuit (ACAC) for full load range ZVS. With proposed ACACs, all main switches achieve zero-voltag...

In this paper, a power supply system for hybrid renewable energy conversion is proposed, which can process PV (photovoltaic) power and wind-turbine energy simultaneously for step-down voltage and high current applications. It is a dual-input converter and mainly contains a PV energy source, a wind turbine energy source, a zero-voltage-switching (ZVS) forward converter, and a current-doubler rec...

Due to the quick development of wide bandgap power devices, density converters is expected be much higher. In order increase and efficiency dual-active-bridge (DAB) converter, especially under light load, a quasi-optimal current root-mean-square (rms) control strategy achieve All-zero-voltage switching (ZVS) proposed by taking inductor rms optimization algorithm into account in this article. Fi...

This paper proposes an inductive coupled wireless power transfer (WPT) system with class-E2 dc-dc converter along with its design procedure. The proposed WPT system can achieve high power-conversion efficiency at high frequencies because it satisfies the class-E zero-voltage switching and zero-derivative-voltage switching conditions on both the inverter and the rectifier. By using the class-E i...

In this paper, a ZVS-PWM threephase current-fed push–pull dc–dc converter is proposed. When compared to single-phase topologies, the three-phase dc–dc conversion increases the power density, uses the magnetic core of the transformer more efficiently, reduces the stress on switches, and requires smaller filters since the frequency for its design is higher. The proposed converter employs an activ...

Rev. Abstract The most recent version (C2MTM) of Silicon Carbide (SiC) devices is used in a Zero Voltage Switching (ZVS) converter application. A 1200V, 160mohm SiC MOSFET from Cree Inc. is used to design a high-frequency ZVS LLC resonant fullbridge (FB) DC/DC converter. With the outstanding advantages of SiC MOSFET, which has lower junction capacitance and low-on-state resistor compared to a s...

Abstract: Frequency drift is a serious problem in Current-Fed Wireless Power Transfer (WPT) systems. When the operating frequency is drifting from the inherent Zero Voltage Switching (ZVS) frequency of resonant network, large short currents will appear and damage the switches. In this paper, an inductance-dampening method is proposed to inhibit short currents and achieve constant-frequency oper...