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Zero voltage zero current switch DC-DC converter

A zero-voltage, zero-current, DC-DC technology, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and output power conversion devices, can solve the problem of large voltage and current stress of switch tubes and large circulating energy , Auxiliary tube can not achieve soft switching and other problems, to achieve the effect of reducing switching loss and eliminating overlap phenomenon

Inactive Publication Date: 2009-06-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many new circuit topologies, there are still some shortcomings, such as the large voltage and current stress of the switching tube, the soft switching of the auxiliary tube, the four zeros of the main switching tube, and the existence of large circulating energy.

Method used

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  • Zero voltage zero current switch DC-DC converter
  • Zero voltage zero current switch DC-DC converter
  • Zero voltage zero current switch DC-DC converter

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Embodiment Construction

[0015] The present invention relates to a zero-voltage zero-current transfer DC-DC converter, including a step-up DC-DC converter composed of a main switch tube (S1), a power diode (D) and an energy storage inductor (Lf). An auxiliary resonant network 1 controlled by an auxiliary switching tube (S2) and an auxiliary resonant network 2 controlled by a second auxiliary switching tube (S3) are characterized in that: the positive pole of the power supply is connected to the main switching tube ( The collector of S1), one end of the first capacitor (C1), the collector of the second auxiliary switch tube (S3), the same-named end of the first inductor (L1), the non-identical end of the second inductor (L2), and the power diode The positive end of (D); the emitter of the main switching tube (S1), the other end of the first capacitor (C1) is connected to the negative end of the power supply; the emitter of the second auxiliary switching tube (S3) is connected to the fourth inductance ( ...

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Abstract

A transfer DC-DC inverter of zero-voltage and zero-current type is prepared as forming booting DC-DC inverter by master switch tube A, power diode D and energy storage inductance L, realizing zero-voltage and zero-current on-off state of master switch tube A and realizing zero-current soft switch of auxiliary switch tubes B and C by utilizing auxiliary switch tube B to control auxiliary resonant network A and utilizing auxiliary switch tube C to control auxiliary resonant network B.

Description

technical field [0001] The invention relates to a zero-voltage zero-current transfer DC-DC converter, in particular to a soft-switching PWM converter. Background technique [0002] The hard-switching PWM converter is widely used for its simple topology, simple control method, constant operating frequency and good output regulation characteristics. In high-voltage and high-power applications, power devices are subjected to high voltage and current stress, large switching losses, and electromagnetic interference caused by voltage spikes and current surges may affect the normal operation of the converter. In the traditional design, it is usually necessary to use a large-capacity switching device supplemented by a snubber circuit, and it is difficult to increase the switching frequency. In order to solve these problems, many soft switching technologies have been proposed at home and abroad in recent years, such as resonant switching technology, zero switching technology and zer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
Inventor 林国庆
Owner FUZHOU UNIV
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