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Power converter

A technology of power converter and switching tube, which is applied in the direction of output power conversion device, DC power input conversion to DC power output, instrument, etc., which can solve the problems of large switching loss and inability to realize zero-voltage switching, and reduce switching loss Effect

Inactive Publication Date: 2012-10-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This converter uses three main inductors. When the two phases are interleaved and commutated in parallel, the current commutation is realized through the inductors, so that the zero-current switching (ZCS) of the main power switching tube can be realized, but the zero-voltage switching (ZCS) cannot be realized. ZVS), the switching loss is still large

Method used

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 Shown is the circuit diagram of the power converter of the embodiment of the present invention, which is used to provide the electric power of the power supply V1 to the load R1, including: an inductance circuit connected to the power supply V1, and used to commutate the input current of the power supply V1; two phases are interleaved and connected in parallel The boost circuit is connected in series with the inductance circuit, and is used to boost the output voltage of the inductance circuit and provide it to the load R1.

[0022] The inductance circuit includes a main inductance L1 and a reverse coupling inductance TX1, and the reverse coupling inductance TX1 is two inductances P1 and P2 with opposite phases. One end of the main inducto...

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Abstract

The invention discloses a power converter which comprises an inductive circuit and a two-phase staggered parallel booster circuit. The inductive circuit comprises a main inductor and a back-coupling inductor, the back-coupling inductor comprises a positive inductor and a reverse inductor which are opposite in phase, one end of the main inductor is connected with a power source while the other end of the main inductor is connected with an input end of the positive inductor and the reverse inductor, and the other end of the positive inductor and the other end of the reverse inductor are connected with anodes of two diodes of the two-phase staggered parallel booster circuit respectively. Current commutation is realized by the main inductor and the back-coupling inductor during commutation of the two-phase staggered parallel booster circuit, zero-current and zero-voltage on and off of a power switching tube are realized, influences of reverse recovery of the power switching tube are greatly reduced, and switching loss of the power switching tube is further reduced.

Description

technical field [0001] The invention relates to a device in the technical field of power electronics, in particular to a power converter. Background technique [0002] Traditional two-phase interleaved parallel boost converters use coupled inductors or transformers to increase the effective inductance under CCM (current conduction) by means of hard switch control. There are mainly two forms of two-phase interleaved parallel coupled inductor boost converter and two-phase interleaved parallel three-state switch boost converter. [0003] Both the two-phase interleaved parallel coupled inductor boost converter and the two-phase interleaved parallel three-state switch boost converter use PWM (pulse width modulation) control. When the main power switch is turned on, the main inductor stores energy and the load energy is output The filter capacitor is provided; when the main power switch tube is disconnected, the main inductor provides energy to the output filter capacitor and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/24
CPCY02B70/1491Y02B70/10
Inventor 付电波郭新方宏苗
Owner HUAWEI TECH CO LTD
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