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Magnetic integrated resonant converter

A technology of integrating resonant converters and converters, which is applied in the fields of LLC resonant converters, resonant converters, DC/DC converters and switching power supplies, can solve the problem that the conversion power/magnet weight ratio cannot reach the maximum value and the magnetic energy conversion efficiency Can not be fully utilized, the industrialized mass production winding process is complicated, etc., to achieve the effect of simple manufacturing process, classic characteristics, and small harmonic components

Inactive Publication Date: 2014-04-30
陶顺祝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A traditional LLC series resonant converter such as figure 1 As shown, the LC parallel resonant converter such as figure 2 As shown, the three-phase resonant converter such as image 3 As shown, the resonant circuit is designed with an independent inductance Lr. The resonant circuit includes a resonant inductance Lr connected in series at one end of the primary winding of the main transformer. The traditional resonant circuit adopts the design scheme of connecting the inductance and the resonant transformer in series, and there are three defects; 1. The volume of the two components is large; 2. In the process of electric energy-magnetic energy-electric energy conversion, the conversion efficiency of magnetic energy cannot be fully utilized; 3. The two independent magnetic circuit systems of the resonant inductor Lr and the main transformer T need to design
[0003] In the literature with the patent number ZL200710192354.0, a pair of oppositely arranged EE cores, part of the primary winding and all the secondary windings are wound on the central column, and the other part of the primary winding is wound on the side column. There are two windings, and the industrial mass production winding process is complex
[0004] In the literature of "ArkadiyKats, Gregory Ivensky, SamBen-Yakov" "Application of interated magnetics in resonant converters" "IEEE-APEC,1997:925-930", the combination of two magnetic cores can solve the problem of large volume; but , the resonant inductor Lr and the main transformer T are two independent magnetic circuit systems, and the conversion efficiency of the magnetic circuit system, that is, the conversion power / magnet weight ratio cannot reach the maximum value

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specific Embodiment 1

[0040] refer to Figure 9 , is using Figure 6 The integrated magnetic parts are applied to series resonant converters, and the resonant converters include switching circuits, resonant circuits, and integrated magnetic parts;

[0041] The switch circuit is a half-bridge chopper, which is composed of a switch tube Q1 and a switch tube Q2 connected in series. The input terminal of the chopper is connected to the DC voltage source Vin, and the output terminal of the chopper is connected to the input terminal of the resonant circuit. The oscillator chops the DC power into an AC square wave and outputs it to the resonant circuit. The resonant circuit converts the AC square wave voltage into a sinusoidal current waveform. The resonant converter includes a resonant circuit and a main transformer. The resonant circuit adopts an LLC series resonant topology, including magnetic integration. The equivalent resonant inductance Lr of the component and the resonant capacitor Cr are connect...

specific Embodiment 2

[0046] refer to Figure 10 , is using Figure 4 The integrated magnetic parts are used in parallel resonant converters, and the resonant converters include switching circuits, resonant circuits, and integrated magnetic parts.

[0047] The switch circuit is a single-ended switch circuit. The switch circuit is composed of a switch tube Q2. The output terminal of the switch circuit is connected to the input terminal of the resonant circuit. The switch circuit chops the direct current into an AC square wave and outputs it to the resonant circuit. The wave voltage is converted into a sinusoidal current waveform. The resonant converter includes a resonant circuit and a main transformer. The resonant circuit adopts an LC parallel resonant topology, including the equivalent inductance Lr of the magnetic integrated component and the resonant capacitor Cr. The equivalent of the resonant capacitor Cr and the magnetic integrated component The inductors are connected in parallel to form a...

specific Embodiment 3

[0052] refer to Figure 11 , is using Figure 8 The integrated magnetic parts of the company are used in three-phase series resonant converters, and three-phase DC / DC converters include three-phase switching circuits, resonant circuits, and magnetic integration components.

[0053] In the embodiment of the present invention, the switch circuit is a three-phase half-bridge chopper, and may also be set as a full-bridge chopper;

[0054] In the embodiment of the present invention, the resonant circuit is a series resonant circuit, and the resonant circuit includes the equivalent resonant inductance Lr and resonant capacitors Cra, Crb, and Crc of the magnetic integrated assembly; the resonant circuit converts the square wave input voltage of the switch circuit into a sinusoidal AC current.

[0055] In the embodiment of the present invention, the bridge arms of the three switching circuits are respectively connected in parallel with the input DC bus; the three switching circuits a...

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Abstract

A magnetic integrated resonant converter comprises a resonant circuit and an integrated magnetic assembly. The output end of the resonant circuit is coupled with primary windings of the integrated magnetic assembly. The magnetic integrated resonant converter is characterized in that the integrated magnetic assembly serves as a magnetic integrated transformer; the integrated magnetic assembly comprises a pair of magnetic cores oppositely arranged, each magnetic column is provided with no less than three magnetic columns, the primary windings and secondary windings wind the magnetic cores, all the secondary windings wind the center magnetic columns, and all the primary windings wind the center magnetic columns and the edge columns. According to the resonant converter with the integrated magnetic assembly adopted, the conversion efficiency of the magnetic assembly of the converter is the maximum, and in the industrial mass production process, the manufacturing process of the resonant converter is simple.

Description

Technical field: [0001] The invention belongs to the technical field of power electronics and relates to a resonant converter, in particular to an LLC resonant converter, a DC / DC converter and a switching power supply. technical background: [0002] A traditional LLC series resonant converter such as figure 1 As shown, the LC parallel resonant converter as figure 2 As shown, the three-phase resonant converter such as image 3 As shown, the resonant circuit is designed with an independent inductance Lr, and the resonant circuit includes a resonant inductance Lr connected in series at one end of the primary winding of the main transformer. The traditional resonant circuit adopts the design scheme of inductance and resonant transformer connected in series, and there are three defects; 1. The volume of the two components is large; 2. In the process of electric energy-magnetic energy-electric energy conversion, the conversion efficiency of magnetic energy cannot be fully utili...

Claims

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Application Information

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IPC IPC(8): H02M3/28H01F27/30
Inventor 陶顺祝
Owner 陶顺祝