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

Voltage stabilization and current sharing control method of three-phase interleaved parallel LLC resonant converter

A resonant converter and control method technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., can solve the problems of device parameter error, uneven load distribution, and uneven current.

Active Publication Date: 2017-06-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and propose a three-phase interleaved parallel LLC resonant converter voltage stabilization and current sharing control method for stabilizing the output voltage of the three-phase parallel LLC resonant converter without changing the circuit hardware structure Under the premise of multi-phase parallel connection, it can solve the problem of uneven current caused by its own device parameter error or uneven load distribution, and can also improve the dynamic stability of the system

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
  • Voltage stabilization and current sharing control method of three-phase interleaved parallel LLC resonant converter
  • Voltage stabilization and current sharing control method of three-phase interleaved parallel LLC resonant converter
  • Voltage stabilization and current sharing control method of three-phase interleaved parallel LLC resonant converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented.

[0033] The control method of the present invention is suitable for series resonant conversion circuits, specifically including: parallel connection of LC series resonant conversion circuits (SRC), parallel connection of series-parallel resonant conversion circuits (SPRC) and parallel connection of LLC series resonant conversion circuits, the main topology of the circuit can be half bridge, full bridge, etc.

[0034] Table 1 Ripple rate of output capacitor ripple in each phase

[0035]

[0036] Io represents the output current, Imi represents that there are i modules connec...

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 voltage stabilization and current sharing charge control method of a three-phase interleaved parallel LLC resonant converter. The control method of the converter is achieved mainly by adopting a voltage-type PFM (pulse width frequency modulation) control method and a control method combining with formula (shown in the description) control, and formula (shown in the description) control is compensated by introducing a formula (shown in the description) zero-returning controller, the influence of nonuniform electric current caused by errors of an electromagnetic device is eliminated, output current ripples are reduced, the service life of the converter is prolonged, the conversion efficiency and dynamic stability of a resonant transformation circuit system can be improved, and the voltage stabilization and current sharing charge control method has an important application significance.

Description

technical field [0001] The present invention relates to the technical field of power electronics, and more specifically, to a control method for voltage stabilization and current sharing of a three-phase interleaved parallel LLC resonant converter. Background technique [0002] LLC (abbreviation of Lr, Lm, Cr, where Lr is resonant inductance, Lm excitation inductance, Cr is resonant capacitor) resonant converter has high switching frequency, small turn-off loss, high efficiency, light weight, small size, low electromagnetic interference It has the advantages of low noise and small switching stress, so it has been widely used. Although the converter has many advantages, there are still some deficiencies, especially in applications where the output current reaches tens or hundreds of amps and the power level reaches tens or even hundreds of kilowatts. This LLC topology has obvious defects and cannot meet the The needs of practical applications are mainly reflected in: (1) In ...

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): H02M3/335
CPCH02M3/33569H02M1/0006H02M1/007Y02B70/10
Inventor 冯兴田万满满马文忠刘勇王晓陶媛媛
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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