Control method based on adaptive hybrid rectification multi-switch resonance LLC converter

A technology of hybrid rectification and control method, which is applied in the direction of converting AC power input into DC power output, output power conversion device, photovoltaic power generation, etc. Zero current conduction, violating the miniaturization design of the converter, etc., to achieve the effect of improving the power density

Pending Publication Date: 2022-04-12
HUBEI UNIV OF TECH
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in applications that require a wide output voltage (such as electric vehicle chargers, lighting power supplies, distributed power distribution, etc.), pulse frequency modulated LLC resonant converters are difficult to achieve a wide voltage regulation range because their voltage gain is limited by the switching frequency.
Also, the use of frequency modulation complicates the converter design
In particular, when the switching frequency is far away from the resonant frequency, there will be a large circulating current in the circuit, and the switching tube can

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
  • Control method based on adaptive hybrid rectification multi-switch resonance LLC converter
  • Control method based on adaptive hybrid rectification multi-switch resonance LLC converter
  • Control method based on adaptive hybrid rectification multi-switch resonance LLC converter

Examples

Experimental program
Comparison scheme
Effect test

Example

[0045] The first embodiment of the present invention is, for example,:

[0046] A five-switching dual resonance LLC resonance converter with a mixed rectified structure, characterized in that the structural primary edge inverter network (II) can operate in a variety of inverter states, up and down symmetrical resonance network (III) shared resonance inductance And the resonant capacitance, the secondary rectification network (V) can only achieve adaptive switching circuit rectification mode based on the conductive state of the primary switch tube and the secondary side assist switch, and reduce the number of components and the volume of the components. A wider output voltage gain range.

[0047] The system technical solution of the present invention is a five-switching dual resonance LLC resonance converter with a mixed rectifier structure, including: a capacitance unit (I), inverter network (II), resonant network (III), high frequency Transformer (IV), rectifier network (V), puls...

Example

[0094] The second specific implementation of the invention is, for example:

[0095] The proposed five-switch double resonant network LLC resonant converter circuit and control method of mixed rectifier structure figure 1 Indicated. Where u in For DC input power, provide a stable input voltage for the inverter network, the first input capacitor C of the capacitor unit (I) in1 With the second input capacitor C in2 In series, the input voltage is assured. First switch tube S 1 And the second switch tube S 2 The first end is connected in series, the third switch 3 And the fourth switch tube S 4 The first end is connected in series. Among them, with the third switching tube S 3 , Fourth switch tube S 4 Harmonic capacitor C which is connected in public r , Resonant inductance L r , First excitation inductance L m1 , Second excitation inductance L m2 Connected to the upper and lower symmetrical resonance network (III); the first high frequency transformer T 1 , Second high frequency tra...

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 a control method based on an adaptive hybrid rectification multi-switch resonance LLC converter. The circuit is characterized in that the structure is simple, the number of required components is small under the condition that the same wide output voltage range is achieved, and the circuit comprises a capacitor unit, an inversion network, a resonance network, a high-frequency transformer, a rectification network and a pulse signal generation unit. According to the control method, fixed-frequency asymmetric pulse width (APWM) modulation is adopted, the switching frequency is fixed and equal to the resonant frequency, the conduction duty ratio of a switching tube is changed only through a pulse signal generation unit, smooth switching of a full-bridge inverter circuit, a half-bridge inverter circuit, a full-bridge inverter circuit and a voltage doubling rectifier circuit is achieved, and then ultra-wide output voltage regulation is achieved. And meanwhile, circulating current in the circuit is small, control is simple, and the size miniaturization of the transformer is facilitated.

Description

technical field [0001] The invention belongs to the field of power electronics, in particular to a control method based on an adaptive hybrid rectification multi-switch resonant LLC converter. Background technique [0002] In recent years, with the increasingly prominent problems of energy crisis and environmental pollution, clean energy applications such as new energy vehicles, wind power generation, and photovoltaics have ushered in a period of great development. Among them, DC-DC converters with electrical isolation play an important role in the above fields. play an indispensable role. At present, high conversion efficiency and high power density are the mainstream development directions of DC-DC converters. How to meet their voltage regulation requirements, high-frequency and high-efficiency operation, and miniaturization in different applications are the main research hotspots. [0003] Among a series of DC-DC converters, the LLC resonant converter has become a resear...

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): H02M7/521H02M1/08H02M7/162H02M1/12H02M1/14
CPCY02E10/56Y02E10/76
Inventor 潘健郭泓展邵冰张恢鉴石迪宋豪杰李子修易深华
Owner HUBEI UNIV OF TECH
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