Unlock instant, AI-driven research and patent intelligence for your innovation.

Low-ripple single-phase rectifier

A single-phase rectification, low ripple technology, applied in the field of electrical converters, can solve the problems of large loss of electrolytic capacitors, reduced capacitance, short life, etc., to improve reliability and life, eliminate dependence, and reduce AC ripple Effect

Inactive Publication Date: 2015-02-11
SHANGHAI WIND NEW ENERGY TECH
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the loss of electrolytic capacitors is large, the life is short, the electrolyte is easy to dry out, and the capacitance will decrease with time, so that it will gradually fail. Therefore, it is urgent to develop an electronic rectifier device with low ripple and no electrolytic capacitors.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-ripple single-phase rectifier
  • Low-ripple single-phase rectifier
  • Low-ripple single-phase rectifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] figure 1 For the traditional single-phase rectifier circuit and waveform diagram. figure 1 a) is the AC voltage waveform input to the rectifier, figure 1 c) is the DC voltage waveform rectified by the rectifier, figure 1 b) is the circuit diagram of the single-phase rectifier bridge.

[0012] from figure 1 It is found from the waveform of c) that if there is no filter capacitor behind the rectifier, then from the peak (the maximum value of the half-sine wave) to the valley of zero voltage, the pulsating voltage of the AC ripple is very high, that is to say, the capacity must be sufficient Large electrolytic capacitors are used for filtering to overcome the large trough and obtain a relatively stable DC voltage output.

[0013] The idea of ​​the present invention is to phase-shift the original single-phase voltage, rectify the phase-shifted voltage and superimpose it on the original single-phase rectified voltage. Since the phase-shifted rectified voltage is located ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses several topology structures of a low-ripple single-phase rectifier. A basic structure is as follows: the rectifier employs a three-phase bridge to replace a single-phase bridge; and a phase shift circuit is additionally arranged and is connected in series with a rectification arm of an AC power line and a rectification bridge to enable added rectification output waveforms to fall at the valley positions of original single-phase rectification waveforms, such that output DC power can be enabled to employ a non-electrolytic capacitor with quite low capacitance for filtering, and the single-phase rectifier does not rely on a short-life and low-efficiency electrolytic capacitor. The low-ripple single-phase rectifier can be widely applied to all small-power single-phase rectifiers or other DC power devices relying on AC input.

Description

technical field [0001] The invention belongs to the technical field of electric current conversion, and specifically proposes an electronic rectifier device suitable for low-power single-phase AC power input and DC power output. Background technique [0002] In many low-power electronic devices, the single-phase alternating current provided by the grid must pass through a rectifier to obtain direct current. However, after single-phase rectification, the DC power with high AC ripple is obtained. It must be filtered by a large-capacity electrolytic capacitor to filter out the AC ripple and obtain a relatively stable DC power. Usually, the value of the capacitor required is relatively large. Only The set filtering effect can only be achieved by using electrolytic capacitors. However, the loss of electrolytic capacitors is large, the life is short, the electrolyte is easy to dry out, and the capacitance will decrease with time, so that it will gradually fail. Therefore, it is u...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02M7/06H02M1/12
CPCH02M7/06H02M1/126
Inventor 於岳亮於菲
Owner SHANGHAI WIND NEW ENERGY TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com