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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AI-Extracted 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...
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Method used

Adopt the embodiment example two of the integrated magnetic parts of non-standard EE type iron core, with reference to accompanying drawing 3, the column in the iron center is biased to one side column, part of the primary winding and all secondary windings are wound on the central column, and the other part The primary winding is wound on the side columns close to the center column. The center column is on the left side, and the core is not limited to EE type. In addition to the advantages of Figure 2, the magnetic core using this structure can also reduce the amount ...
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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.

Application Domain

Technology Topic

Conductor CoilConverter design +4

Image

  • 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(4)

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 resonant converter includes a DC power supply (1), a primary side circuit (2) of the LLC resonant converter, and a secondary side rectification filter circuit (4), wherein the primary side circuit (2) of the LLC resonant converter is powered by the main power The source of the tube (Q1) is connected to the drain of (Q2), the drain of the main power tube (Q1) is connected to the positive pole of the DC power supply (1), and the source of the main power tube (Q2) is connected to the DC power supply (1). The negative pole is formed by connecting one end of the resonant capacitor to the midpoint of the bridge arm; the secondary side rectification and capacitor filter circuit (4) is a diode full-bridge rectification circuit or a full-wave rectification circuit, and the specific composition is: the anode of DR1 is connected to the cathode of DR2, The anode of DR3 is connected to the cathode of DR4, DR1 is connected to the cathode of DR3, DR2 is connected to the anode of DR4, and the filter capacitor (C o ) is connected to the full-bridge rectifier circuit composed of the cathodes of DR1 and DR3; the integrated magnetic component includes a pair of oppositely arranged EE cores and primary windings (N p ), secondary winding (N s ); part of the primary winding (N p ) and all secondary windings (N s ) is wound on the central column, and the other part of the primary winding (N p ) bypass the left column (it can also be wound around the right column, or bypass the left and right columns at the same time), when the converter transmits power to the secondary side, the primary winding (N p ) current inflow point is the same name terminal, which is connected to the negative terminal of the resonant capacitor, the outflow point is connected to the negative terminal of the DC power supply (1), and the two terminals of the secondary winding are connected to the midpoint of the full-bridge rectifier. In addition, the integration method is widely applicable to resonant converters and ZVS phase-shifted full-bridge converters with small secondary side leakage inductance and primary side string inductance.

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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Description & Claims & Application Information

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