This paper proposes the process to predict and analyze the conducted electromagnetic interference (EMI) emission using the impedance mismatch approach. Five steps of this process are introduced and analyzed. The impedance mismatch criterion is proposed based on current and voltage waveforms in time domain. The impedance mismatch fixtures and EMI measured results show how the relationship of imp...

This paper explores the design of a Class-E amplifier with finite DC-feed inductance using three tuning methods. Furthermore, this work quantifies impacts process (referred to in as effect) on main figures merit (FoMs) amplifier. The goals were guarantee two conditions: zero voltage and derivative switching (i.e., soft-switching tuning). To best authors’ knowledge, systematic methods have not b...

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...

To improve the energy quality, most of the renewable energy systems include an energy storage element charged by the bidirectional DC-DC converter. This paper proposes the bidirectional DC-DC converter which employs the two bridge configuration resonant class-E converters on the both sides of the isolating transformer. The low side converter is controlled as step up and the high side converter ...

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...

This article proposes a new Zero-Voltage Switching (ZVS) high step-up DC/DC converter based on built-in transformer for renewable energy applications. The proposed topology utilizes Three-Winding Built-In Transformer (TWBT) to increase the voltage gain, but unlike most coupled-inductor-based DC-DC converters, output voltages can be obtained under lower magnetic turns ratio. In this circuit, wit...

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...

A new configuration for modular isolated bidirectional dc-dc converters is presented. The proposed converter has interesting features such as fewer switching devices, bidirectional power flow, and low switching losses. The simple modular structure, high frequency operation, zero voltage switching (ZVS) capability, and fewer switching devices make the extended configuration of the proposed conve...