Composite active clamped 3-phase A.C-D.C power factor correction transformer

A composite active clamp, three-phase AC technology, applied in the field of composite active clamp three-phase power factor correction converters, can solve the problems of large switching loss of devices, limit operating frequency, reduce circuit efficiency, etc., to improve power The effect of density, increasing operating frequency, and improving circuit efficiency

Active Publication Date: 2005-01-12
ZHEJIANG UNIV
View PDF0 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This three-phase AC-DC power factor correction converter can realize input current power factor correction, but the circuit works in a hard switching state, there is a problem of reverse recovery of the diode, and the switching loss of the device is large, which limits the increase of the operating frequency and reduces the The circuit efficiency is improved and there is a large electromagnetic interference

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
  • Composite active clamped 3-phase A.C-D.C power factor correction transformer
  • Composite active clamped 3-phase A.C-D.C power factor correction transformer
  • Composite active clamped 3-phase A.C-D.C power factor correction transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] refer to figure 2 , the composite active clamping three-phase AC-DC power factor correction converter of the present invention comprises a three-phase bridge arm composed of six anti-parallel fully-controlled main switches S1-S6 with diodes connected to the power supply and each phase bridge respectively The input inductance LA~LC between the midpoints of the arms and the output capacitor Co connected to the output terminal of the three-phase bridge arm are characterized in that the six main switches S1-S6 of the three-phase bridge arm are connected in parallel with capacitors C1-C6, as shown in the figure. In the three-phase bridge arm, the positive bus bar of the three-phase bridge arm and the positive terminal of the output capacitor Co are connected to the resonant inductance Lr, and the circuit connected in series by the auxiliary switch S7 with a diode connected in antiparallel and the clamping capacitor Cc is connected across the two ends of the resonant inductan...

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 converter includes six pieces of three phase bridge arm including full controlled main switch with diode connected in inverted parallel, input inductance connected between power source and middle point of each phase bridge arm, and output capacitance connected to output end of three phase bridge arm. Characters are that capacitance is connected to six main switches respectively. Resonant inductance is connected to DC bus of three-phase bridge arm and output capacitance. Cascaded circuit of auxiliary switch and clamping capacitance is cross-connected on two ends of resonant inductance. Two ends of the auxiliary switch are connected to diode in inverted parallel as well as connected to capacitance. Features of the converter are simple structure, restraining backward recovery of diode connected in inverted parallel, realization of soft switch and high efficiency of circuit.

Description

technical field [0001] The invention relates to an AC-DC converter, especially a composite active clamp three-phase power factor correction converter. Background technique [0002] The current three-phase AC-DC power factor correction converter such as figure 1 As shown, it includes a three-phase bridge arm composed of six anti-parallel fully-controlled main switches S1~S6 with diodes, respectively connected to the input inductors LA~LC between the power supply and the midpoint of each phase bridge arm and connected to the three The output capacitor Co at the output of the phase arm. This three-phase AC-DC power factor correction converter can realize input current power factor correction, but the circuit works in a hard switching state, there is a problem of reverse recovery of the diode, and the switching loss of the device is large, which limits the increase of the operating frequency and reduces the The circuit efficiency is improved and there is a large electromagneti...

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 Applications(China)
IPC IPC(8): H02M1/14H02M1/42
CPCY02B70/126Y02B70/1491Y02B70/10Y02P80/10
Inventor 徐德鸿冯波徐君
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap