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Digital type direct-current test power source

A DC test and digital technology, applied in the direction of converting AC power input to DC power output, converting DC power input to DC power output, energy industry, etc., can solve the problems of small output power and large volume, and achieve improved efficiency, The effect of small size and light weight

Inactive Publication Date: 2015-01-07
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention develops a portable digital DC test power supply by itself, which solves the problems of small output power and large volume of the test power supply in the prior art

Method used

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  • Digital type direct-current test power source

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Embodiment

[0020] like figure 1 As shown, the box is equipped with a filter circuit, a rectifier circuit, a PFC circuit and a full-bridge phase-shifting resonant circuit; AC power is input to the filter circuit through the input terminal of the box body, and the filter circuit is filtered and then input to the rectifier circuit, and the rectifier circuit is converted into high-voltage DC after rectification. ;High-voltage DC input PFC circuit, PFC circuit converts high-voltage DC into 380V regulated DC; 380V regulated DC voltage is input to the full-bridge phase-shifting resonant circuit, and the full-bridge phase-shifting resonant circuit adjusts the pulse width of the transformer working in high-frequency state Duty cycle output DC regulated power supply; the secondary of the transformer is rectified and filtered and then output to the outside of the box.

[0021] The AC input adopts a phase-controlled soft switch and a double-channel full-bridge conversion circuit.

[0022] The PFC c...

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Abstract

The invention relates to a digital type direct-current test power source. A filtering circuit, a rectifying circuit, a PFC circuit and a full-bridge phase shift resonance circuit are arranged in a box body. Alternating current is input a filtering circuit through an input terminal of the box body. The alternating current is input into the rectifying circuit after being filtered by the filtering circuit. The alternating current is converted into high-voltage direct current after being rectified by the rectifying circuit. The high-voltage direct current is input the PFC circuit. The high-voltage direct current is converted into 380 V stable-voltage direct current by the PFC circuit. The voltage of the 380 V stable-voltage direct current is input into the full-bridge phase shift resonance circuit. The full-bridge phase shift resonance circuit adjusts the pulse width duty ratio of a transformer working at a high frequency state and outputs direct-current stable-voltage power. The direct-current stable-voltage power is rectified and filtered by the secondary level of the transformer and then output to the outside of the box body. Alternating-current 220 V power input is adopted, the output voltage ranges from 20 V to 250 V and is adjustable, the rated output current is 10 A, and the rated output power is 2.5 KW. The digital type direct-current test power source is small in size, light in weight and convenient to operate, and input wiring and output wiring of devices are easy.

Description

technical field [0001] The present invention relates to an electrical test power supply, in particular to a digital DC test power supply, which provides a special test power supply for the whole group test of a DC rated voltage 220V protection device, and provides overvoltage and undervoltage power supplies for debugging the inverter power supply of the protection device. It can also provide a temporary DC debugging power supply for the production and construction site, and belongs to the technical field of electrical testing. Background technique [0002] According to the design requirements, the test power panel for testing is no longer installed in the substation, and the "Inspection Regulations for Relay Protection and Power Grid Safety Automatic Take the test power supply"; it is also required that "for the outlet relay in the operation box, the inspection of the action voltage range should be carried out, and its value should be between 55%-70% of the rated voltage. Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36H02M7/162H02M1/10H02H7/10H02H3/06
CPCH02H7/10H02M1/32H02M3/33592Y02P80/10
Inventor 苏红
Owner STATE GRID CORP OF CHINA
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