Multi-phase rectifier device capable of single-phase power supply

Abstract

The invention discloses a multi-phase rectification topological structure capable of single-phase power supply. The advantage of multi-phase rectification is obvious higher than that of single-phase rectification, the difficulty lies in that a new idea is found out to generate a plurality of vector points from two vector points by a phase-shift device, so that a multi-phase power system is expanded, the ripple after multi-phase bridge rectification is substantially reduced, the voltage stability is remarkably improved, the voltage numerical value is also improved compared with single-phase rectification, and a universal technology of upgrading and upshifting a single-phase rectifier becomes and can be used for substituting the single-phase rectifier in a traditional widely-used electronicproduct such as a rectification power supply in a computer power supply, a television, a washing machine, a frequency-variable air conditioner, a power driver in an LED lamp, a rectifier in a communication device, a charger, a new energy automobile charging pile, a power battery charger and an electrical train.

Description

technical field [0001] The invention belongs to the technical field of electrical conversion, and relates to an electronic rectifier device of a specific grade for single-phase AC power input and DC power output. Background technique [0002] In electronic equipment of various power levels, the single-phase alternating current provided by the grid must pass through a rectifier to obtain direct current as an energy supply. However, the average DC output voltage of a single-phase rectifier is lower than that of a single-phase rectifier. At the same time, the single-phase rectifier obtains direct current with high AC ripple, which must be filtered by a large-capacity electrolytic capacitor to filter out the AC ripple. For stable direct current, a large-capacity electrolytic capacitor is usually required to achieve the predetermined filtering effect, and the filtering loss is large and the power supply efficiency is low. Large-capacity capacitor filtering will also reduce the p...

AI Technical Summary

Problems solved by technology

This kind of rectifying power supply through a common rectifier tube conducting in one direction is widely used, but it is a power supply device with poor performance.

In addition, the DC output voltage of this rectifier has no voltage fine-tuning capability, because there is no simpler rectifier power supply device with better performance

Although the performance of the pulse width modulation rectifier is very good, it must use a switching rectifier, the cost is too high, and the economy is not ideal, which limits its popularization and application

Images