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Wide-voltage range switching power source

A technology of switching power supply and wide voltage, which is applied in the direction of electrical components, adjusting electric variables, output power conversion devices, etc.

Inactive Publication Date: 2015-07-08
CHENGDU TIANXING ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current development of energy meters tends to be regardless of voltage level, that is, one power supply covers all voltages: 30V-456V. However, there is no DC isolated power supply with such a wide range of input voltage in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 2 As shown, the rectification circuit is a full-wave rectification circuit, the full-wave rectification circuit includes a diode D1, a diode D2, a diode D3 and a diode D4, the voltage dividing circuit includes a resistor R1 and a resistor R2, the current limiting circuit includes a resistor R3, and the drive circuit includes N-channel enhanced field effect transistor Q1, N-channel enhanced field effect transistor Q2, Zener diode D5, Zener diode D6, Zener diode D7, resistor R4 and resistor R5.

[0026] The positive pole of the diode D1 is connected to the positive pole of the diode D2, the negative pole of the diode D1 is connected to the positive pole of the diode D3, the negative pole of the diode D2 is connected to the positive pole of the diode D4, the negative pole of the diode D3 is connected to the negative pole of the diode D4, and the diode D1 is connected to the negative pole of the diode D4. The common connection point of D3 is connected to the...

Embodiment 2

[0032] Such as Figure 5 As shown, the rectification circuit is a half-wave rectification circuit, the half-wave rectification circuit includes a diode D8, the voltage divider circuit includes a resistor R1 and a resistor R2, the current limiting circuit includes a resistor R3, and the driving circuit includes an N-channel enhanced field effect transistor Q1 , N-channel enhanced field effect transistor Q2, Zener diode D5, Zener diode D6, Zener diode D7, resistor R4 and resistor R5.

[0033] The anode of the diode D8 is connected to the live wire end of the external AC power supply, the cathode of the diode D8 is respectively connected to the resistance R1, the resistance R4 and one end of the switching power supply DC, one end of the resistance R2, one end of the resistance R5, and the N-channel enhanced field The source of the effect transistor Q1, the source of the N-channel enhanced field effect transistor Q2 and the anode of the Zener diode D5 are all connected to the neut...

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PUM

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Abstract

The invention discloses a wide-voltage range switching power source. The wide-voltage range switching power source comprises a switching power source body DC, a rectifier circuit, a bleeder circuit, a current limiting circuit and a drive circuit. The first current input end of the rectifier circuit is connected with the live wire end of an external alternating current power source, the second current input end of the rectifier circuit is connected with the null line end of the external alternating current power source, the first current output end of the rectifier circuit is connected with the first current input end of the bleeder circuit and the first current input end of the drive circuit, the second current output end of the rectifier circuit is connected with the second current input end of the bleeder circuit and the second current input end of the drive circuit, the first current output end of the rectifier circuit is connected with one end of the switching power source body DC, the current output end of the drive circuit is connected with the other end of the switching power source body DC, the current output end of the bleeder circuit is connected with the current input end of the current limiting circuit, and the current output end of the current limiting circuit is connected with the third current input end of the drive circuit. The input voltage range is 20 V-500 V, the output voltage is 3.3 V-12 V, and the power reaches 10 W.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a switching power supply with a wide voltage range. Background technique [0002] The voltage level of the three-phase electric energy meter is divided into several levels: Un=57.7V or 100V or 220V or 380V. The voltage working range of each grade of energy meter is 60%Un-120%Un. The current development of energy meters tends to be regardless of voltage level, that is, one power supply covers all voltages: 30V-456V. However, there is currently no DC isolated power supply with such a wide range of input voltage in China. Contents of the invention [0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a switching power supply with a wide voltage range, the input voltage range is 20V-500V, the output voltage is 3.3V-12V, and the power is up to 10W. [0004] The purpose of the present invention is achieved by the following ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00
CPCH02M7/219
Inventor 黄茂彪杨衡
Owner CHENGDU TIANXING ELECTRIC