Adjustable transformer ratio-based wide-input LLC resonant converter and regulation and control method

A resonant converter and transformer technology, which is applied in the direction of converting DC power input to DC power output, output power conversion devices, instruments, etc., can solve the problem of efficiency reduction filter inductance, system instability, LLC filter efficiency and stability improvement and other issues, to achieve the effect of improving efficiency and stability, and high converter efficiency

Active Publication Date: 2016-11-16
SHANGHAI JIAO TONG UNIV
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the input voltage changes in a large range, it is necessary to adjust the switching frequency to deviate from the resonance point, which will lead to a decrease in the performance and efficiency of the LLC resonant converter, and will cause the gain sensitivity of the converter, resulting in system insta

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
  • Adjustable transformer ratio-based wide-input LLC resonant converter and regulation and control method
  • Adjustable transformer ratio-based wide-input LLC resonant converter and regulation and control method
  • Adjustable transformer ratio-based wide-input LLC resonant converter and regulation and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0024] Such as figure 1 As shown, the topology of the wide-input LLC resonant converter based on the adjustable transformer ratio provided by the present invention is composed of a full-bridge inverter link, a resonant cavity, a transformer with taps on the secondary side, and an uncontrolled full-bridge rectifier link. Among them: resonant inductance L r 90μH, magnetizing inductance L m 270μH, resonant capacitance C r 30nF, output capacitance is 1000μF, resonance frequency f r It is...

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 provides an adjustable transformer ratio-based wide-input LLC resonant converter and a regulation and control method. The adjustable transformer ratio-based wide-input LLC resonant converter comprises an inversion module, a resonance module, a transformer and a rectification module, wherein after an input voltage passes through the inversion module and the resonance module in sequence, the input voltage is subjected to voltage reduction through the transformer; then a stable direct current voltage is output through the rectification module, and taps are arranged on the secondary side of the transformer and are used for adjusting the transformer ratio according to the magnitude of the input voltage. By adoption of the LLC resonant converter designed in the invention, a relatively small switching frequency variation range can be maintained, and can be basically stabilized between 0.8fr and fr (which is illustrated in the specification); and meanwhile, the stable output voltage can be guaranteed in a relatively wide input voltage range, so that the efficiency and the stability of the LLC resonant converter are improved.

Description

Technical field [0001] The invention relates to the field of electrical engineering, in particular to a wide-input LLC resonant converter based on an adjustable transformer ratio and a control method. Background technique [0002] LLC resonant converter has the advantages of high efficiency and high power density, and is widely used in DC-DC converter applications. The LLC resonant converter can achieve zero voltage turn-on (ZVS) of the primary side switch (ZVS) and zero current turn-off (ZCS) of the secondary side switch within the entire operating range. Its parasitic components include the junction capacitance of semiconductor devices and the leakage of transformers. Both inductance and magnetizing inductance can be used to achieve ZVS, which makes LLC resonant converters have high operating efficiency. The loss caused by the most important lossy magnetic element of LLC resonant converter, LLC resonant converter usually uses variable frequency modulation (VF) technology, that...

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): H02M3/338
CPCH02M3/3381H02M3/3385Y02B70/10Y02P80/10
Inventor 李文宇王志新
Owner SHANGHAI JIAO TONG 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