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

Bridgeless power factor correction (PFC) circuit

A circuit and bridge arm technology, applied in the field of bridgeless PFC circuits, can solve the problems of low conversion efficiency and low power density of bridgeless PFC circuits, and achieve the effect of improving power conversion efficiency and power density, high power density and small size

Inactive Publication Date: 2018-08-14
ZTE CORP
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a bridgeless PFC circuit to solve the problem of low conversion efficiency and power density of the bridgeless PFC circuit in the prior art

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
  • Bridgeless power factor correction (PFC) circuit
  • Bridgeless power factor correction (PFC) circuit
  • Bridgeless power factor correction (PFC) circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] An embodiment of the present invention provides a bridgeless PFC circuit, including:

[0024] AC power supply, step-up inductance, autotransformer, at least two groups of switch bridge arms, bus capacitor; each group of switch bridge arms includes a bridge arm midpoint and at least two bridge arm endpoints; the autotransformer includes at least two one output end of the boost inductor; one end of the step-up inductor is connected to the AC power supply, and the other end is connected to the input end of the autotransformer; each output end of the autotransformer is connected to the bridge of one group of switch bridge arms; The midpoints of the arms are connected, and the bridge arm endpoints of each group of...

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 a bridgeless power factor correction (PFC) circuit, relates to the technical field of power electronics and is used for solving the problems of relatively low conversion efficiency and power density of the bridgeless PFC in the prior art. The circuit comprises an AC power supply, a boost inductor, a self-coupling transformer, at least two groups of switch bridge arms and abus capacitor, wherein each group of switch bridge arm comprises a bridge arm middle point and at least two bridge arm end points, the self-coupling transformer comprises at least two output ends, oneend of the boost inductor is connected with the AC power supply, the other end of the boost inductor is connected with an input end of the self-coupling transformer, each output end of the self-coupling transformer is connected with the bridge arm middle point of one of the two groups of switch bridge arms, and the bridge arm end points of each group of switch bridge arm are connected with different end points of the bus capacitor.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a bridgeless PFC circuit. Background technique [0002] In the field of power electronic AC rectification technology, especially power factor correction, the currently popular topology of the AC-DC converter is bridgeless PFC (Power Factor Correction, power factor correction). The industry has derived various improved bridgeless PFC topologies from the traditional bridgeless PFC topology. However, the inductance ripple current of the boost inductor in the existing interleaved parallel bridgeless PFC circuit is large, and the inductor volume is large; at the same time, the current flowing through the switch The effective value of the current of the tube is large, and the conversion efficiency of the circuit is low. Therefore, the existing bridgeless PFC circuit has low conversion efficiency and low power density. Contents of the invention [0003] The technical probl...

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): H02M1/42H02M1/15
CPCH02M1/15H02M1/4233H02M1/42Y02B70/10
Inventor 胡永辉
Owner ZTE CORP
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