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

A kind of control method of series resonant converter

A technology of series resonance and control method, which is applied in the conversion equipment with intermediate conversion to AC, AC power input is converted into DC power output, DC power input is converted into DC power output, etc. It can solve the problem of difficult loop control and series resonance. The converter voltage is unstable and the output voltage gain is not monotonic, so as to solve the problems of non-monotonic gain, improve loop stability and expand the output range

Active Publication Date: 2016-02-24
ZTE CORP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The object of the present invention is to provide a control method for a series resonant converter, which solves the problem of voltage instability of the series resonant converter under low-voltage light load or no-load conditions, effectively expands the output range, and solves the problem of Due to the problem that the output voltage gain is not monotonous when adjusting the duty cycle, the loop is difficult to control

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
  • A kind of control method of series resonant converter
  • A kind of control method of series resonant converter
  • A kind of control method of series resonant converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040]In order to describe the technical content, structural features, objectives and effects of the present invention in detail, further descriptions will be made below in conjunction with the embodiments and accompanying drawings.

[0041] The control method of the present invention is applicable to series resonant conversion circuits, specifically including: LC series resonant conversion circuit (SRC), series parallel resonant conversion circuit (SPRC) and LLC series resonant conversion circuit; the circuit topology can be half bridge, full bridge, etc.

[0042] Control method of the present invention is as follows:

[0043] The feedback signal is obtained by collecting the analog output signal of the series resonant converter, and the operating frequency of the series resonant converter is changed according to the feedback signal; the control mode of the series resonant converter is selected according to the state of the load. When the load is light-loaded or no-loaded, Th...

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 control method of a series resonant converter. The method obtains a feedback signal by collecting an analog output signal of the series resonant converter, and changes the operating frequency of the series resonant converter according to the feedback signal; and when the series resonant converter When the load is light-loaded or no-loaded, it adopts a hybrid control mode combining frequency modulation width modulation and fixed width frequency modulation. Ring control to switch. The present invention adopts the mixed control mode when the load is light-loaded or no-loaded and realizes the switching between the mixed control mode and the frequency modulation control mode through the hysteresis control, thereby solving the problem of the voltage of the series resonant converter under the low-voltage light-loaded or no-loaded state. The problem of instability effectively expands the output range, and at the same time solves the problem that the output voltage gain is not monotonous and the loop is difficult to control when the duty cycle is adjusted.

Description

technical field [0001] The invention relates to a resonant power conversion technology, in particular to a control method for a series resonant converter. Background technique [0002] With the development of power conversion technology, high efficiency and high power density has become an important development trend. The resonant converter has been widely used and paid attention to in the application of switching power supply technology due to its advantages of soft switching, high efficiency, high operating frequency and small size. As one of the simple circuit topologies, the series resonant converter can not only meet the high frequency requirements, but also achieve high conversion efficiency, and has been widely adopted in the industry. [0003] Take the LLC (abbreviation of Lr, Lm, Cr, which respectively represent the resonant inductance, excitation inductance and resonant capacitor in the resonant parameters) series resonant converter as an example. The voltage on ...

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): H02M3/28H02M1/00
CPCH02M7/523H02M3/33507H02M3/33576Y02B70/10Y02P80/10H02M1/0032H02M1/0058H02M3/33571H02M3/01H02M1/0003
Inventor 刘溪川鲍胜华陈洲
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