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High-power adjustable DC (Direct Current) stabilized voltage power supply

A DC regulated power supply, high-power technology, applied in the direction of converting DC power input to DC power output, converting irreversible AC power input to DC power output, adjusting electrical variables, etc. Problems such as large power loss of power supply and regulating tube, and low power conversion efficiency

Inactive Publication Date: 2012-10-24
刘喆
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  • 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 power supply, and it is not easy to manufacture large-scale transistors. regulated power supply for current

Method used

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  • High-power adjustable DC (Direct Current) stabilized voltage power supply

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Embodiment Construction

[0014] According to attached figure 1 The present invention can be realized by implementing the circuit working principle diagram of the high-power adjustable DC stabilized power supply and the description of the drawings and the technical requirements of the components described below.

[0015] Selection of components and technical parameters

[0016] QZ is a full-bridge rectifier element, requiring working current ≥ 10A and working voltage ≥ 100V;

[0017] IC1 is a three-terminal adjustable shunt reference voltage source, model TL431, package type T0-92, 3 pins are reference terminal, positive terminal and negative terminal; adjustable, the working current range is 0.1 ~ 100mA;

[0018] VT1 is an enhanced N-channel high-power field effect transistor, the model is 2SK790, and the package is T0-220;

[0019] VT2 is an NPN transistor, choose 2SC9013, 3DG8050, 3DG12 and other models, and require β≥140;

[0020] Resistor R1 is RTX-1 / 4W type metal film resistor with a resistan...

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Abstract

The invention discloses a high-power adjustable DC (Direct Current) stabilized voltage power supply. The high-power adjustable DC stabilized voltage power supply is composed of a 220 V AC (Alternating Current), an AC step-down transformer, a full-bridge rectifier circuit, a sampling circuit, a sampling signal amplification and current-limiting protection circuit and a voltage division circuit, wherein an adjusting tube VT1 in the sampling signal amplification and current-limiting protection circuit adopts an enhanced N-channel high-power field-effect tube; and the selected type is 2SK790. As the adjusting tube in the former high-power serial adjustable stabilized voltage power supply almost adopts a high-power NPN type transistor or PNP type transistor, the disadvantage is that the adjusting tube is great in power consumption, thereby causing very low power conversion efficiency. By regarding a high-precision three-end adjustable branch reference voltage source TL431 as the core and adopting the enhanced N-channel high-power field-effect tube as the adjusting tube, the high-power adjustable DC stabilized voltage power supply, disclosed by the invention, not only can output a big current and adjust the outputting voltage, but also can improve conversion efficiency and reliability of the power supply greatly.

Description

technical field [0001] The invention belongs to the technical field of electronics and power supply, and relates to a high-power adjustable DC stabilized power supply. Background technique [0002] High-power adjustable DC stabilized power supply is a must-have power supply for electronic circuit designers or electronic 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 power supply, and it is not easy to manufacture large-scale transistors. Current stabilized power supply. [0003] In order to solve or make up for the shortcomings of these high-power adjustable regulated power supplies on the market, the present invention uses a high-power adjustable DC regulated power supply made of a reference voltage source, and uses a high-pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/12H02M3/156
Inventor 刘喆
Owner 刘喆
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