A DC-DC converter is designed according to the request of the electric propulsion system for a fuel cell sightseeing car. The converter adopts a simple topography full bridge circuit. The main switch transistors are driven by the module TL494, based on pulse-width modulation method. A high accuracy linear optical coupler is used to isolate analogy signal in order to guarantee the stabilization ...

This article considers the design methodology and modulation of quasi-Z-source modular multilevel converter (qZS-MMC) with half-bridge submodules (HBSMs) evaluates its performance in voltage boosting mode for medium applications. The qZS-MMC consists two qZS networks inserted between terminals dc input source dc-link an MMC, which allows generation output larger than voltage. Two schemes have b...

An adaptive controller based on multi-layer feed-forward neural network is developed for real-time voltage regulation of a class of PSFB (phase-shifted full-bridge) DC-DC converters. The controller has the unique advantages of nonlinear mapping and adaptive learning. and performs well over a wide range of input voltages and output load currents. The controller is implemented and tested in hardw...

This paper considers three pairs of circuit schemes for RF rectification. Given finite available power from RF source and load resistance, we formulate DC output power and efficiency of each scheme. Resultant formulas find that load-to-source resistance ratio R/r dominates the circuit performance. Maximum efficiency reaches 81.1% at R/r = 1 for single-diode half wave rectifiers. It also reaches...

This paper presents a single-stage ZVT full-bridge AC/DC converter for aerospace applications. The detailed operating principle and design consideration of this soft-switched converter are analyzed and described. The proposed circuit topology and control scheme are proposed to exhibit optimum performances (i.e. high power factor, high efficiency, ring-free and low EMI features). A laboratory pr...

Abstract – This paper describes a novel structure for single phase Unified Power Quality Conditioner-Distributed Generation (UPQC-DG) with direct grid connected DC-AC converter for low DC output DG systems which can be used not only for compensation of power quality problems but also for supplying of load power partly. This converter has been composed of one full-bridge inverter, one three wind...

This paper proposes a comprehensive Markov model to study the reliability performance of conventional isolated multiple-switch pulse width modulation DC-DC (IMSDC-DC) converters including full-bridge, half-bridge and push-pull topologies. The suggested helps achieve more precise outcomes with better reflection real-world operation characteristics by (i) relying on self-embedded fault tolerant c...

The paper presents a single phase transformer based inverter for nonlinear load application using PID controller. A capacitive full bridge circuit is used to provide instant current under nonlinear load conditions and thereby reducing the harmonics. A new proportional plus integral controller for inverter control is proposed to eliminate the dc current component, and steady state error under he...

A conventional high power DC power supply systems consist of a three-phase diode rectifier followed by a high frequency converter to supply loads at regulated DC voltage. These rectifiers draw significant harmonic currents from the utility, resulting in poor input power factor. In this paper, a DC power supply based on dual-bridge matrix converter (DBMC) with reduced number of switches is p...