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Bridge rectifier

Bridge rectifier

The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...

Full wave rectifier

Full wave rectifier

A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.

Voltage Doubler Circuit

Voltage Doubler Circuit

A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.

The Delta-to-Delta Circuit

The Delta-to-Delta Circuit

In a delta-delta configuration, the source and the load are connected in a delta manner, forming a closed loop that divides the network into three distinct phases. This configuration makes the phase voltages identical to line voltages. Assuming the sources are in positive sequence, the phase voltages can be expressed directly without having a neutral wire.

Half wave rectifier

Half wave rectifier

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The Delta-to-Y Circuit

The Delta-to-Y Circuit

In the delta-wye circuit, the source is delta-connected, while the load is in a wye configuration. This means that the phase voltage of the delta-connected source is equal to the line voltage of the wye-connected load. The connection between two-line currents originates from the delta-connected source. The phase difference in the balanced system allows for calculating one line current given the other, utilizing the positive sequence of phases. In the delta-wye system, the phase currents in the...

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Comparison between phase-shift full-bridge converters with noncoupled and coupled current-doubler rectifier.

Cheng-Tao Tsai¹, Jye-Chau Su², Sheng-Yu Tseng³

¹Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan.

Thescientificworldjournal

|January 2, 2014

Summary

This study compares noncoupled current-doubler rectifiers (NCDR) and coupled current-doubler rectifiers (CCDR) in phase-shift full-bridge converters. NCDR offers better duty ratio and component stress, while CCDR excels in efficiency and component count for high-step-down applications.

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Area of Science:

Electrical Engineering
Power Electronics
Converter Design

Background:

Phase-shift full-bridge converters with conventional current-doubler rectifiers face limitations in high current and high step-down voltage applications.
These limitations include extremely low duty ratios and high component stresses.

Purpose of the Study:

To propose and implement phase-shift full-bridge converters utilizing noncoupled current-doubler rectifiers (NCDR) and coupled current-doubler rectifiers (CCDR).
To analyze and compare the performance and efficiency of NCDR and CCDR in a 500 W phase-shift full-bridge converter.

Main Methods:

Experimental comparison of NCDR and CCDR in a 500 W phase-shift full-bridge converter prototype.
Analysis of key performance metrics including duty ratio, component stresses, output current ripple, component count, and efficiency.

Main Results:

The phase-shift full-bridge converter with NCDR demonstrated an optimal duty ratio, reduced component stresses, and lower output current ripple.
The CCDR exhibited fewer components and higher efficiency, particularly at full load conditions.

Conclusions:

NCDR is suitable for applications requiring optimal duty ratio and reduced component stress.
CCDR is advantageous for high step-down voltage and high efficiency applications demanding smaller size and fewer components.