Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Alternating current-direct current (AC-DC) converter and frequency converter

A technology of AC and DC converters, which is applied in the field of frequency converters, can solve the problems of high cost and achieve the effects of low cost, improved power factor, and guaranteed power factor

Inactive Publication Date: 2013-11-13
SIEMENS AG
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rectifier consists of a three-phase IGBT bridge and a three-phase inductor, and a complex control algorithm is required to generate the IGBT drive signal, so the cost is very high

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
  • Alternating current-direct current (AC-DC) converter and frequency converter
  • Alternating current-direct current (AC-DC) converter and frequency converter
  • Alternating current-direct current (AC-DC) converter and frequency converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Aiming at the problems existing in the prior art, the present invention proposes a brand-new AC-DC converter structure, which can not only improve the power factor, but also has the function of energy recovery, and the cost is low.

[0032] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] Figure 5 It is a structural schematic diagram of a frequency converter with the AC-DC converter of the present invention. Such as Figure 5 As shown, the frequency converter is mainly composed of three parts: an AC-DC converter, a capacitor and an IGBT-based frequency converter. The functions of the capacitor and the IGBT-based frequency converter are the sam...

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 present invention discloses an AC-DC converter comprising: a three-phase thyristor based converter, a simplified insulated gate bipolar transistor (IGBT) based full-bridge converter, and an inductor connected between them; in the driving mode, the three-phase thyristor based converter works as an AC-DC rectifier, and the simplified IGBT based full-bridge converter works as a boost chopper circuit, and controls the inductor to suppress the current harmonic of the power supply network, so as to increase the power factor; in the regeneration braking mode, the three- phase thyristor based converter feeds the regenerated energy back to the power supply system for energy recovery. The present invention also discloses an inverter. Use of said solution of the present invention can not only increase the power factor, but can also achieve energy recovery at a lower cost.

Description

technical field [0001] The invention relates to electronic circuit technology, in particular to an AC-DC converter and a frequency converter including the AC-DC converter. Background technique [0002] At present, variable frequency speed regulation motor drives (frequency converters) have been widely used in various industrial fields, mainly for precise speed control or energy saving. Due to the simple structure and low cost, in most frequency converters, a diode bridge rectifier is used to convert an alternating current (AC, Alternating Current) to a direct current (DC, direct current). figure 1 It is a structural schematic diagram of an existing frequency converter in common use. Such as figure 1 As shown, a diode bridge rectifier is used to process the conversion from AC to DC, and a frequency converter based on an insulated gate bipolar transistor (IGBT, Insulated Gate Bipolar Transisitor) is used to process the conversion from DC to AC. [0003] However, diode bridg...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12H02M5/44
CPCH02M2001/007H02M7/757H02M1/007
Inventor 姚吉隆吴学智赵研峰克晶宋英华
Owner SIEMENS AG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com