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Multi-phase alternating resonant converter

A resonant converter, multi-phase interleaving technology, applied in instruments, converting DC power input to DC power output, adjusting electrical variables, etc., can solve problems such as reducing output ripple current, reducing system efficiency, and difficult to achieve current sharing , to reduce the output ripple current, achieve current sharing, and achieve the effect of simple structure

Inactive Publication Date: 2012-11-21
ZTE CORP
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AI Technical Summary

Problems solved by technology

However, the coupling of the resonant inductor needs to be under the condition that the voltage phase difference is an integer multiple of 180°, which can only be satisfied by a two-phase system, and the two-phase system cannot improve the output current ripple, and the circulating current between the coupled inductors will also be reduced. overall system efficiency
[0008] It can be seen that the existing three interleaved parallel structures, due to their own shortcomings, are difficult to simultaneously ensure the realization of current sharing between the phases, reduce the output ripple current and improve the conversion efficiency of the resonant conversion circuit system

Method used

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Embodiment Construction

[0032] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] refer to Figure 4 and Figure 5 , an embodiment of a multi-phase interleaved resonant converter of the present invention is proposed. In this embodiment, the multi-phase interleaved resonant converter is composed of at least two unit resonant circuits, wherein each unit resonant circuit includes an inverter circuit 110, a resonant circuit 120, a transformer 130, and a rectifier circuit 140, wherein the inverter circuit 110 uses For generating a square wave, it is connected with the input voltage, the input port of the resonant circuit 120 is connected with the inverter circuit 110, the output port of the resonant circuit 120 is connected in parallel with the primary side of the transformer 130, and the secondary side of the transformer 130 is connected with the rectifier circuit 140. The secondary side of th...

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Abstract

The invention discloses a multi-phase alternating resonant converter. The multi-phase alternating resonant converter comprises at least two unit resonant circuits, wherein each unit resonant circuit comprises an inverter circuit, a resonant circuit, a transformer and a rectifying circuit; the inverter circuit is used for generating square waves and is connected with input voltage; an input port of the resonant circuit is connected with the inverter circuit; an output port of the resonant circuit is connected with the primary side of the transformer in parallel; the secondary side of the transformer is connected with the rectifying circuit; the secondary side of the transformer in one unit resonant circuit is connected with the secondary side of the transformers of other unit resonant circuits in a star-shaped manner. The invention provides the multi-phase alternating resonant converter which is formed by connecting at least two unit resonant circuits in parallel, so that the flow equalization of the multi-phase power conversion unit is achieved, the output ripple current is reduced, and the conversion efficiency of the resonant conversion circuit system is improved.

Description

technical field [0001] The invention relates to the field of resonant converters, in particular to a multi-phase interleaved resonant converter. Background technique [0002] In order to meet the requirements of high efficiency and high power density, resonant converters are widely used in DC-DC converters. The relationship between the ripple current on the output capacitor and the output load current is: [0003] i c _ rms = I o π 2 - 8 8 [0004] Among them, ic_rms is the effective value of the ripple current of the output capacitor, and Io is the output load current. It can be seen that the larger the load current, the larger the ripple current of the output capacitor. In order to reduce the output ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/338H02M1/12
CPCY02B70/1433Y02B70/10Y02P80/10
Inventor 范杰
Owner ZTE CORP
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