Modular power supply device with reverse prevention function and reverse-prevention control circuit

A technology of control circuit and power supply device, which is applied in the direction of output power conversion device, emergency protection circuit device, control/regulation system, etc., and can solve problems such as uneven flow of diodes, lower module efficiency, and increased module radiator. Achieve the effect of improving module load adjustment rate, improving module efficiency, and simple and reliable structure

Inactive Publication Date: 2012-10-03
BEIJING DINGHAN TECH GRP CO LTD
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  • Abstract
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Problems solved by technology

This technical solution has the advantages of simple and reliable circuit structure and less components used, and is suitable for module power supplies that output small current power supplies, but in practical applications, there are the following disadvantages: 1) The high loss caused by the forward conduction voltage drop of the isolation diode, The efficiency of the module is reduced, and at the same time, the high loss brings serious thermal problems, which leads to the increase of the module radiator and the increase of the module volume; 2) The forward conduction voltage drop of the

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  • Modular power supply device with reverse prevention function and reverse-prevention control circuit
  • Modular power supply device with reverse prevention function and reverse-prevention control circuit
  • Modular power supply device with reverse prevention function and reverse-prevention control circuit

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[0032] The present invention will be further described below with reference to the drawings and embodiments. The present invention is described by taking a standardized railway signal module power supply as an example. For example, the standardized railway signal module power output specification is 24V, rated current is 75A, and peak current is 82.5A. The above-mentioned main parameters of the power supply of the railway signal module will be described in detail through specific embodiments.

[0033] image 3 It is a functional block diagram of a modular power supply device with anti-reverse function provided by specific embodiments of the present invention. Such as image 3 As shown, the modular power supply device with anti-reverse function includes a switching power supply module 301, an isolation circuit unit 302, and an anti-reverse control circuit unit 303. The switching power supply module 301 is combined with an isolation circuit unit 302 and an anti-reverse control cir...

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Abstract

The invention discloses a modular power supply device with a reverse prevention function and a reverse-prevention control circuit. An isolation circuit and a reverse-prevention control circuit are additionally arranged on an output end of the traditional switching mode power supply module, and the reverse-prevention control circuit is used for controlling the work state of the isolation circuit so as to further make the output of the switching mode power supply module controllable. By means of the technical scheme, the circuit is simple and reliable in structure, the oscillation-free smooth switching of the switching mode power supply module can be realized, the modular efficiency is increased, and the modular load regulation rate is increased.

Description

technical field [0001] The invention relates to the field of switching power supplies, in particular to a modularized power supply device with an anti-reverse function and an anti-reverse control circuit. Background technique [0002] With the intelligentization, informatization and networking of the railway transportation command system, the application scope of railway signal power supply is gradually developing towards the comprehensive centralized power supply system. At present, railway signal power supplies use standardized power modules to supply power to railway equipment. The power supply of the railway signal module adopts two-way power supply-main-standby input. After automatic switching by the AC contactor, it is filtered by electromagnetic interference, boosted and rectified by a high-frequency rectifier with parallel current sharing, and converted by high-frequency (DC / DC) to All kinds of DC power output, module power supply parallel current sharing output to ...

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Application Information

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IPC IPC(8): H02M3/156H02H7/10
Inventor 汤益锋魏学业马治国
Owner BEIJING DINGHAN TECH GRP CO LTD
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