Topological magnetic integrated converter suitable for LLC resonance series

A resonant converter, the technology of the converter is applied in the conversion equipment with intermediate conversion to AC, DC power input is converted to DC power output, instruments, etc. and other problems, to achieve the effect of reducing volume, easy leakage inductance, and improving power density

Inactive Publication Date: 2008-09-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires a magnetic conductor, and there are leakage inductances on both the primary and secondary sides of the transformer, which will affect the performance of the converter
Arkadiy Kats, Gregory Ivensky, Sam Ben-Yakov, "Application of Interated Magnetics in Resonant Converters", IEEE-APEC, 1997pp.925-930 provides another way to obtain multiple magnetic circuits, which has been successfully applied in resonant converters , the two magnetic cores A and B are used in combination, the primary w

Method used

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  • Topological magnetic integrated converter suitable for LLC resonance series
  • Topological magnetic integrated converter suitable for LLC resonance series
  • Topological magnetic integrated converter suitable for LLC resonance series

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Embodiment 1 of the present invention

[0033]Referring to FIG. 6 , it is a schematic diagram of applying the integrated magnetic device of FIG. 2 to a half-bridge LLC resonant converter. Including the DC power supply, the primary side circuit of the LLC resonant converter, the secondary side rectifier filter circuit and the EE integrated magnetic component, it integrates the transformer and the resonant inductor in the traditional LLC resonant converter to obtain the integrated magnetic component. The core material can be selected from various ferromagnetic materials such as ferrite, microcrystalline, ultra-microcrystalline, permalloy, etc. In addition, by customizing the magnetic core, the distance between the two windings bypassed by the primary side can be reduced, and the magnetic column where the winding is located can be reduced. It can be changed flexibly, and the winding can be realized by using flat winding or wound winding.

[0034] The half-bridge LLC reson...

Example Embodiment

[0035] Embodiment 2 of the present invention

[0036] Referring to FIG. 7 , it is a schematic diagram of applying the integrated magnetic component of FIG. 2 to a full-bridge LLC resonant converter. Among them, the primary winding (N p ) The current inflow point is the same name terminal, which is connected to the negative terminal of the resonant capacitor, and the outflow point is connected to the main power switch tube Q 1 The source and Q 2 The connection point of the drain, the two terminals of the secondary winding are connected to the midpoint of the full-bridge rectifier, and the outflow point is connected to the main power switch tube Q 1 The source and Q 2 The connection point of the drain, and the two terminals of the secondary winding are connected to the midpoint of the full-bridge rectifier.

Example Embodiment

[0037] Embodiment 3 of the present invention

[0038] Referring to FIG. 8 , it is a schematic diagram of applying the integrated magnetic component of FIG. 2 to a composite full-bridge three-level LLC resonant converter. Among them, the primary winding (N p ) The current inflow point is the same name terminal, which is connected to the negative terminal of the resonant capacitor, and the outflow point is connected to the main power switch tube Q 5 The source and Q 6 The connection point of the drain, and the two terminals of the secondary winding are connected to the midpoint of the full-bridge rectifier.

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Abstract

According to the defect that the magnetic member of the existing LLC resonant converter has a larger volume, the invention provides a magnetic integrated converter suitable for LLC resonant series topology, pertaining to the direct current converter. The converter designs the transformer and inductances in the original circuit of the converter into an integrated magnetic member, the converter not only can decrease the volume of the magnetic members, but also allows the leakage inductance to be easy to control, wherein the leakage inductance are centralized at primary side. The converter includes a direct-current power supply, an LLC resonant transformer, a primary circuit and a secondary rectification circuit, the converter uses the integrated magnetic member as a magnetic integrated converter, wherein, the integrated magnetic member includes a couple of relative setup EE iron cores, the iron cores are respectively winded with a primary winding and a secondary winding, part of the primary winding and entire secondary winding are winded at the middle pole, the other part of the primary winding are winded at the left side pole or right side pole; the input end of the primary winding is connected to the primary circuit, the output end of the secondary winding is connected to the secondary rectification circuit.

Description

1. Technical field [0001] The topological magnetic integrated converter suitable for LLC resonant series of the present invention belongs to a direct current converter of an electric energy conversion device. 2. Background technology [0002] With the development of modern power electronics technology and the birth of high-frequency switching devices, switching power supplies are developing in the direction of high frequency, integration and modularization. Facts have proved that increasing the switching frequency can reduce the size of the device, improve the power density and reliability of the equipment, and reduce the switching noise. Because the resonant converter can achieve soft switching, effectively reduce the switching loss, and further increase the frequency, it has been widely valued and studied in the field of high-frequency power conversion. The LLC resonant converter is to add the LLC resonant network to the converter, so that the switching tube can realize Z...

Claims

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Application Information

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IPC IPC(8): H02M3/28H02M3/325
Inventor 陈乾宏吴扣林金科阮新波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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