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Parallel resonant converter and power supply

A technology of resonant converter and resonant inductor, which is applied in the direction of instruments, DC power input conversion to DC power output, electrical components, etc., and can solve the problems of uneven current of two-way resonant converters

Pending Publication Date: 2020-12-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a parallel resonant converter and a power supply to solve the problem of uneven current in two-way resonant converters in the prior art

Method used

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  • Parallel resonant converter and power supply
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  • Parallel resonant converter and power supply

Examples

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example 1

[0040]1. The topological structure of the resonant converter is: two-way asymmetric half-bridge resonant converter topology;

[0041]2. The resonant inductance shared by the two resonant converters, the excitation inductance of the two transformers, and the primary and secondary windings of the two transformers are magnetically integrated into a pair of magnetic cores to form the first transformer T;

[0042]image 3 It is a schematic diagram of the equivalent circuit of the parallel resonant converter of Example 1 of the embodiment of the present invention, which is the best example of the embodiment of the present invention, such asimage 3 As shown, in Example 1, it is a parallel connection of two asymmetric half-bridge resonant converters, including the first switching devices S1 and S2, the first rectifying devices S10 and S20, and the second switching devices S3, S4, the second rectifier devices S30, S40, the resonant capacitor Cr shared by the two resonant converters, the resonant in...

example 2

[0049]1. The topological structure of the resonant converter is: two-way asymmetric half-bridge resonant converter topology;

[0050]2. The excitation inductance of the two transformers and the primary and secondary windings of the two transformers are magnetically integrated into one pair of magnetic cores to form the first transformer T;

[0051]Figure 4 It is a schematic diagram of the equivalent circuit of the parallel resonant converter of Example 2 of the embodiment of the present invention, such asFigure 4 The parallel resonant converter shown is a parallel connection of two asymmetric half-bridge resonant converters, including the first switching devices S1 and S2, the first rectifying devices S10 and S20, and the second switching devices S3, S4, the second rectifier device S30, S40, the resonant capacitor Cr shared by the two resonant converters and the resonant inductor Lr shared by the two resonant converters, the excitation inductances Lm1, Lm2 of the two transformers and the ...

example 3

[0053]1. The topological structure of the resonant converter is: two-way asymmetric half-bridge resonant converter topology;

[0054]2. The excitation inductance of the two transformers and the primary and secondary windings of the two transformers are magnetically integrated into one pair of magnetic cores to form the first transformer T;

[0055]3. The resonance inductance is the leakage inductance of the transformer T.

[0056]Figure 5 It is a schematic diagram of the equivalent circuit of the parallel resonant converter of Example 3 of the embodiment of the present invention, such asFigure 5 The parallel resonant converter shown is a parallel connection of two asymmetric half-bridge resonant converters, including the first switching devices S1 and S2, the first rectifying devices S10 and S20, and the second switching devices S3, S4, the second rectifier device S30, S40, the resonant capacitor Cr shared by the two resonant converters, the excitation inductances Lm1, Lm2 of the two transfo...

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Abstract

The invention discloses a parallel resonant converter and a power supply. The parallel resonant converter comprises at least two paths of parallel resonant converters, and the at least two paths of parallel resonant converters share a resonant capacitor and a resonant inductor. According to the invention, a problem that current sharing does not exist in the parallel resonant converter in the priorart is solved so that natural current sharing is realized between the two resonant converters.

Description

Technical field[0001]The invention relates to the field of power electronics, in particular to a parallel resonant converter and power supply.Background technique[0002]In the field of power electronics technology, especially DC / DC converters, such asfigure 1 The shown parallel resonant converter is used for high-power output occasions, which can make the distribution of power hot spots more uniform, which is beneficial to the heat dissipation design of the power supply. However, in actual mass-produced products, such asfigure 1 Resonant inductance L shownr1, Lr2And resonant capacitor Cr1, Cr2There is a tolerance in the parameters of, which will cause the voltage gains of the two resonant converters to be inconsistent, which directly leads to the output current Io1And Io2Inconsistent, there may even be only one resonant converter with output current, which will cause the power device to burn out in severe cases.[0003]At present, the commonly used solutions to solve the current sharin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/3353H02M3/335Y02B70/10
Inventor 胡永辉
Owner ZTE CORP
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