Low-power dichroic halogen lamps, usually used for display lighting, have low-voltage filament. The lightweight electronic transformer (ET), based on self-oscillating half-bridge high frequency inverter, are used to replace bulky and heavy conventional 50160 Hz step-down transformer. But their lamp current are rectangular like shape, leading to generate high electromagnetic noise and increase t...

Abstract – In this paper an Improved Zero Voltage Zero Current Pulse Width Modulation Forward converter which employs a simple resonance snubber circuit is introduced. A simple snubber circuit consists of a capacitor, an inductor and two diodes. In proposed converter, switch Q1 operates at ZCS turn-on, and ZVS turn-off conditions and all-passive semiconductor devices operate at ZVZCS turn-on an...

This paper a novel yet simple zero-voltage switching (ZVS) interleaved boost power factor correction (PFC )DC/DC converter used to charge the traction battery of an electric vehicle from the utility systems. The proposed topology consists of a passive auxiliary circuit, placed between two phases of the interleaved front-end boost DC-DC converter, provides enough current to charge and discharge ...

Dual active bridge (DAB) converters are extensively used due to the advantages of wide voltage regulation range and easy realization soft switching. Besides, concept partial power (PPCs) has been widely applied increase converter efficiency by reducing actually processed converter. Therefore, in this paper, DAB PPC combined. And a high frequency DAB-based aiming at optimization is selected out ...

This paper presents the detailed analysis of a full bridge zero current switched (FB-ZCS) PWM converter that is suitable for high-voltage and high-power DC applications. It exhibits excellent ability to incorporate parasitic parameters, zero current turn-off characteristics for all active switches and ZVS operation for all diodes on the high voltage side. Based on the features of high-voltage p...

This paper presents the analysis, design and implementation of cost effective sensorless control scheme of Brushless DC Motors (BLDCM). There are several methods proposed in BLDC motor drives to obtain optimum current and torque control with minimum torque pulsation. But while coming to industrial applications, BLDC motor voltage contains harmonics which are caused because of high speed switchi...

This paper presents the numerical design algorithm for the class-DE amplifier, taking into account optimized resonant inductor designs. The proposed design algorithm provides the element values for satisfying the class-E switching conditions. Simultaneously, the optimal inductors, which have a minimum volume for achieving the permissible power conversion efficiency, can be obtained. By carrying...

Triple active bridge (TAB) as an isolated multiport converter is a promising integrated energy system for smart grids or electric vehicles. This article aims to derive and analyze zero voltage switching (ZVS) regions of TAB, in which both losses are reduced, electromagnetic interference issues mitigated. In the proposed closed-form solution ZVS criteria, parameters such parasitic capacitance sw...

Aiming at the optimization of current stress with low voltage ratio and full ZVS, a control method combining variable duty cycle phase shift was proposed based on dual active bridge (DAB) converters DC blocking capacitors. By adding bias to capacitors, asymmetric modulation (ADM) can adjust as needed. Based theoretical analysis steady-state operation, operating modes be divided into eight modes...

This work is about the analysis of dead time variation on switching losses in a Zero Voltage Switching (ZVS) synchronous buck converter (SBC) circuit. In high frequency converter circuits, switching losses are commonly linked with high and low side switches of SBC circuit. They are activated externally by the gate driver circuit. The duty ratio, dead time and resonant inductor are the parameter...