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

A Control Method of Wide Output Range llc Converter

A converter and wide output technology, which is applied in the field of control of LLC converters with a wide output range, can solve the problems of large volume and weight, unfavorable miniaturization design of LLC converters, and hindering the development of vehicle power supplies, so as to reduce the volume and weight, reducing the operating frequency range, and widening the output voltage range

Inactive Publication Date: 2019-08-30
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vehicle power supply products often use LLC circuits. The charging voltage range of conventional batteries is 230Vdc~430Vdc. Frequency modulation control is the most commonly used control method for LLC converters. In order to meet the requirements of a wide output voltage range, the operating frequency range of LLC converters is very wide. wide, and the resonant inductor and transformer in the LLC converter must be designed according to the minimum operating frequency, its volume and weight will be very large, which is not conducive to the miniaturization design of the LLC converter, and hinders the direction of high power density of the vehicle power supply development of

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 Control Method of Wide Output Range llc Converter
  • A Control Method of Wide Output Range llc Converter
  • A Control Method of Wide Output Range llc Converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings. The invention proposes a control method for a wide output range LLC converter. The topology of the LLC converter is as figure 1 shown, v in is the input DC voltage source of the LLC converter, Q 1 -Q 4 for the MOSFET, D 1 -D 4 antiparallel diode for the MOSFET, L r is the resonant inductance, C r is the resonant capacitor, T is the isolation transformer, D 1 -D 4 is the rectifier diode on the secondary side of the LLC converter, C o is the output filter capacitor of the LLC converter, R is the equivalent load resistance of the LLC converter, and its value changes with the charging state of the battery.

[0019] Such as image 3 Shown is the schematic diagram of the voltage gain curve under LLC mixed control in the present invention, wherein, M min is the minimum voltage gain of the LLC converter working in the half-bridge mode under the control mode of the ...

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 belongs to the technical field of power electronics, in particular to a control method for a wide output range LLC converter. The method adopts the control mode of flexible switching between the full bridge and the half bridge of the LLC converter, and judges the working mode of the LLC according to the demand for the output voltage of the LLC converter; when the output voltage of the LLC converter is less than that of the half bridge LLC converter When the peak output voltage of the LLC converter is higher than the peak output voltage of the LLC converter, the LLC converter operates in the half-bridge mode. When the output voltage of the LLC converter is greater than the peak output voltage of the half-bridge LLC converter, the LLC converter operates in the full-bridge mode; The switching point of the full bridge is at the peak of the gain curve of the half bridge LLC converter. The invention realizes the ability of the LLC converter to work with wide voltage gain and narrow frequency range, which is beneficial to further increase the frequency of the resonant inductor and the isolation transformer, reduces the volume and weight of the resonant inductor and the isolation transformer, and improves the power density of the LLC converter .

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a control method for an LLC converter with a wide output range. Background technique [0002] At present, LLC (Logical Link Control) converters are widely used in medium and high power AC / DC and DC / DC circuits. power products. Vehicle power supply products often use LLC circuits. The charging voltage range of conventional batteries is 230Vdc~430Vdc. Frequency modulation control is the most commonly used control method for LLC converters. In order to meet the requirements of a wide output voltage range, the operating frequency range of LLC converters is very wide. wide, and the resonant inductor and transformer in the LLC converter must be designed according to the minimum operating frequency, its volume and weight will be very large, which is not conducive to the miniaturization design of the LLC converter, and hinders the direction of high power density of...

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): H02M3/335H02M7/48
CPCH02M3/335H02M7/4807H02M7/4815Y02B70/10
Inventor 徐恒山黄永章
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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