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Non-isolated high-current adjustable DC (Direct-Current) stabilized-voltage power supply

A DC stabilized power supply, non-isolated technology, applied in the direction of converting DC power input to DC power output, electrical components, adjusting electrical variables, etc., can solve the problem of low conversion efficiency of DC power supply and difficulty in making high-current DC stabilized voltage Problems such as large power loss of power supply and adjustment tube

Inactive Publication Date: 2013-09-25
黄宇嵩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the adjustment tubes in high-power series adjustable regulated power supplies mostly used high-power NPN transistors or high-power PNP transistors. The main defect is that the power loss of the adjustment tubes is very large, resulting in low conversion efficiency of the DC power supply, which is not easy Make high current DC stabilized power supply

Method used

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  • Non-isolated high-current adjustable DC (Direct-Current) stabilized-voltage power supply

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Embodiment Construction

[0021] According to attached figure 1 The non-isolated high-current adjustable DC regulated power supply circuit shown in the working principle diagram and accompanying drawings, and according to the connection relationship between the components in each part of the circuit described in the summary of the invention, and the components described in the implementation mode The present invention can be realized by implementing the technical parameter requirements and the main points of circuit fabrication. The related technologies of the present invention will be further described below in conjunction with the embodiments.

[0022] Component selection

[0023] Components should be suitable for working under high temperature environmental conditions. The selection of components requires stable and reliable operation. Try to select components with wide temperature adaptability and high temperature resistance. The parameters of power components should be more than 3 times the worki...

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Abstract

The invention discloses a non-isolated high-current adjustable DC (Direct-Current) stabilized-voltage power supply which is characterized by comprising a 8.6-30V power supply, an L-shaped power supply filter circuit, a DC / DC converter, a voltage sampling and outputting voltage adjusting circuit, a power output circuit and a protective circuit; the DC / DC converter is composed of a current mode pulse width modulation integrated circuit IC 1, a resistor R2, a capacitor C2 and a capacitor C3; the current mode pulse width modulation integrated circuit IC 1 is UC3843; the power output circuit and the protective circuit are composed of a power output tube BG2, a resistor R5, a resistor R6, a freewheel diode D1, an inductor L, a resistor R8 and a resistor R7; the power output tube BG2 is an enhanced N-channel high-power field-effect tube which is IRFZ22. The non-isolated high-current adjustable DC stabilized-voltage power supply disclosed by the invention is capable of outputting high current; the output voltage is adjustable; furthermore, the DC stabilized-voltage conversion efficiency and the working reliability are greatly increased.

Description

technical field [0001] The invention belongs to the technical field of switching power supplies, and relates to a non-isolated high-current adjustable DC stabilized power supply. Background technique [0002] High-power adjustable DC regulated power supply is a necessary DC power supply device for electronic circuit designers or laboratories. In the past, the adjustment tubes in high-power series adjustable regulated power supplies mostly used high-power NPN transistors or high-power PNP transistors. The main defect is that the power loss of the adjustment tubes is very large, resulting in low conversion efficiency of the DC power supply, which is not easy Make high current DC regulated power supply. [0003] In order to solve or make up for the shortcomings of these high-power adjustable DC regulated power supplies on the market, the present invention uses the current mode pulse width modulation integrated circuit UC3843 to produce a high-power adjustable DC regulated powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
Inventor 黄宇嵩
Owner 黄宇嵩
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