Bidirectional DC Converter with Frequency Control: Analysis and Implementation

Abstract

In this paper, a direct current (dc) converter with the abilities of bidirectional power transfer and soft switching characteristics is studied and implemented. The circuit schematic of the developed dc converter is built by a half-bridge converter and a center-tapped rectifier with synchronous rectifier. Under forward power transfer, a half-bridge circuit is controlled to regulate the low-voltage side at a stable value. For backward power transfer, a center-tapped rectifier with synchronous rectifier is regulated to control the high-voltage side at the desired voltage value, and the half-bridge circuit is operated as a voltage doubler rectifier. Active power devices are operated at zero-voltage switching using a series resonant technique on the high-voltage side with frequency modulation and inductive load operation. The practicability of the developed converter is established from experiments with a laboratory prototype circuit.

Analysis and Implementation of a Phase-Shift Pulse-Width Modulation Converter with Auxiliary Winding Turns

“…Full-bridge or half-bridge converters with phase-shift pulse-width modulation (PS-PWM) on the secondary side have been discussed in [8][9][10][11] to realize soft switching and wide voltage operation. Series resonant converters or PS-PWM converters with wide voltage operation have been proposed in [12][13][14][15][16][17][18][19]. However, the input or output voltage range proposed in circuit topologies [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] is less than 4:1, i.e.…”

Investigations on Performance Enhancement Measures of the Bidirectional Converter in PV–Wind Interconnected Microgrid System

“…Bidirectional converters are mostly designed to aid in a higher voltage conversion ratio and low switching noise [37]. They can work effectively with the aid of pulse width modulation (PWM) and offer a higher rate of voltage ratio conversion and better current balancing capacity [38]. However, the converter control topology for the bidirectional converter must properly be selected in order to reduce the level of total harmonic distortion [39].…”