Switch power supply of inverse-excitation type self-excitation converting circuit RCC

A technology for converting circuits and switching power supplies, which is applied to conversion equipment with intermediate conversion to AC, conversion of DC power input to DC power output, and conversion of AC power input to DC power output, etc., which can solve the problem of large switching loss, low efficiency, Poor reliability and other issues, to achieve the effect of reducing the turn-off loss

Active Publication Date: 2008-10-01
TEN PAO ELECTRONICS HUIZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the switching power supply using flyback self-excited conversion circuit RCC topology, the switching frequency at light load or no load is twice the

Method used

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  • Switch power supply of inverse-excitation type self-excitation converting circuit RCC
  • Switch power supply of inverse-excitation type self-excitation converting circuit RCC
  • Switch power supply of inverse-excitation type self-excitation converting circuit RCC

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Embodiment Construction

[0025] In order to facilitate the understanding of those skilled in the art, the structural principle of the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings:

[0026] see figure 1 As shown, a switching power supply of a flyback self-excited conversion circuit RCC includes an input rectification filter circuit connected to an AC power supply, a starting circuit, a switch adjustment tube, a switch tube clamp absorption circuit, a switch state controller, and a switch tube The acceleration shutdown circuit, the transformer, the feedback forming circuit of the voltage stabilization control signal, and the output rectification filter circuit, the input rectification filter circuit is connected with the switch adjustment tube and the transformer, the transformer is connected with the output rectification filter circuit, and the switch adjustment tube It is connected with the switch state controller, a swi...

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PUM

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Abstract

The present invention discloses a switch power source of an inverse-excitation type self-excitation converting circuit which comprises an input rectification wave filtering circuit which is connected with an alternating current source. The input rectification wave filtering circuit is connected with a switch adjusting tube and a transformer. The transformer is connected with an output rectification wave filtering circuit. The switch adjusting tube is connected with a switch state controller. A switching tube clamp absorbing circuit is connected between the switch adjusting tube and the transformer. A switching tube acceleration switching circuit and a feedback forming circuit of the voltage stabilizing control signal are connected between the switch state controller and the transformer. The switching frequency of the switch power source according to the invention is unlike to the conventional switch power source and will not ascend to a high value in light load. The switching frequency will not keep to ascent when the load is reduced to a certain degree and an intermittent operation mode is switched to. The main switch frequency is fundamentally sustained to the frequency before the transition point. The switch power source has the advantages of reduced switching loss, increased efficiency of the electric power source, improved working condition of the switch adjusting tube and increased reliability of the electric power source.

Description

technical field [0001] The invention relates to a non-periodic switching power supply, in particular to a switching power supply with a flyback self-excited conversion circuit RCC topology. Background technique [0002] At present, the switching power supply using the flyback self-excited conversion circuit RCC topology, the switching frequency at light load or no load is more than twice the switching frequency at full load, so the switching loss at light load is higher than that at full load When the switching loss is large, the efficiency is very low and the reliability is poor. [0003] Chinese patent No. ZL99804292.7 discloses a switching power supply, which includes a DC power supply for providing input power, for converting the DC current from the DC power supply into an AC current, and for detecting the switching power supply device An output voltage detection circuit for the output voltage of the output voltage, a photocoupler for converting an error signal from the...

Claims

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Application Information

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IPC IPC(8): H02M3/28H02M3/335H02M7/5383
Inventor 洪光椅
Owner TEN PAO ELECTRONICS HUIZHOU
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