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Direct current power source with small size and large power and low wave fluctuation

A DC power supply and high power technology, applied in the field of power supply, can solve problems such as difficult to eliminate ripples and affect the performance of measuring instruments

Inactive Publication Date: 2013-06-19
XIAN SHIQIANG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high-frequency switching characteristics, switching power supplies will generate ripples that are difficult to eliminate, which will affect the performance of measuring instruments that require low-ripple voltage supply

Method used

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  • Direct current power source with small size and large power and low wave fluctuation
  • Direct current power source with small size and large power and low wave fluctuation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0013] As shown in Figure 1, a DC power supply with small size, high power and low ripple, it at least includes: switching power supply 2, linear power supply 4, the input terminal 1 of the switching power supply 2 is connected to the original AC power, and the switching power supply 2 The DC output terminal 3 is electrically connected to the input terminal of the linear power supply 4. Firstly, the switching power supply 2 generates a 7V DC voltage that needs to be output. The voltage is added to the input end of the linear power supply 4. The linear power supply 4 outputs 3V to 5V. The linear power supply 4 has the characteristics of low ripple and constant voltage. The voltage difference of the linear power supply 4 is very small, and the adjustment voltage is only 2 to 4V, so the overall efficiency will not be affected.

Embodiment ２

[0015] As shown in Figure 1, a DC power supply with small size, high power and low ripple also includes: switching power supply 2, linear power supply 4, the input terminal 1 of the switching power supply 2 is connected to the original AC power, and the switching power supply 2 The DC output terminal 3 is electrically connected to the input terminal of the linear power supply 4. First, the switching power supply 2 generates a 15V DC voltage to be output, and the DC voltage generated by the switching power supply 2 is then applied to the input terminal of the linear power supply 4. Terminal 5 is the output voltage of 12V, the adjustment voltage of linear power supply 4 is very small, the adjustment voltage is only 2 to 4V, so the overall efficiency will not be affected.

Embodiment ３

[0017] As shown in Figure 2, a DC power supply with small size, high power and low ripple also includes: switching power supply 2, linear power supply 4, the input terminal 1 of the switching power supply 2 is connected to the original AC power, and the switching power supply 2 The DC output terminal 3 is electrically connected to the input terminal of the linear power supply 4. Firstly, the switching power supply 2 generates a 15V DC voltage to be output, and the DC voltage generated by the switching power supply 2 is added to the input terminal of the linear power supply 4. The linear power supply 4 is a constant The current source, the 300mA constant current output by the linear output terminal 5 of the linear power supply 4, is added to the load 6, and the load 6 is a load that needs constant current power supply, such as a high-power LED.

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PUM

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Abstract

The invention relates to a power source, in particular to a direct current power source with small size, large power and low wave fluctuation. The direct current power source with the small size, the large power and the low wave fluctuation is characterized by at least comprising a switching power source 2 and a linear power source 4. An input end 1 of the switching power source 2 is electrically connected with an alternating current power source. A direct current output end 3 of the switching power source 2 is electrically connected with an input end of the linear power source 4.

Description

technical field [0001] The invention relates to a power supply, in particular to a DC power supply with small volume, high power and low ripple. Background technique [0002] Switching power supply has the advantages of small size and high efficiency, and has been widely used in the power supply of electronic equipment. Its appearance has changed the traditional linear power supply that needs to rely on bulky transformers to convert 220V AC into the required DC voltage. However, due to its high-frequency switching characteristics, switching power supplies will generate ripples that are difficult to eliminate, which will affect the performance of measuring instruments that require low-ripple voltage supplies. Contents of the invention [0003] The object of the present invention is to provide a DC power supply with small volume, high power and low ripple. [0004] The purpose of the present invention is achieved in this way, a DC power supply with small volume, high power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/04H02M1/14
Inventor 张世强
Owner XIAN SHIQIANG ELECTRONICS TECH