Constant-current hybrid triggered driving power supply for power system fault detection devices

A fault detection and power system technology, applied in the direction of output power conversion device, electrical components, AC power input conversion to DC power output, etc., can solve the problems of electromagnetic interference of power supply, working current cannot maintain a constant value, etc., to avoid current Fluctuation, reduction in production cost and maintenance cost, wide range of use effects

Inactive Publication Date: 2015-09-02
CHENGDU CHUANGTU TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the current power supply for fault detection equipment is susceptible to electromagnetic interference, resulting in the inability to maintain a constant value of its working current, and to provide a constant current hybrid trigger driving power supply for power system fault detection devices

Method used

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  • Constant-current hybrid triggered driving power supply for power system fault detection devices
  • Constant-current hybrid triggered driving power supply for power system fault detection devices

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Embodiment

[0019] Such as figure 1 As shown, the present invention consists of a diode rectifier U, a nonlinear trigger circuit connected with the diode rectifier U, a buffer crystal oscillator circuit and a quartz crystal oscillator circuit connected with the nonlinear trigger circuit, and connected in series with the nonlinear trigger circuit The power logic voltage stabilizing circuit between the trigger circuit and the diode rectifier U is composed. In order to achieve the effect of the present invention, a constant current circuit is connected in series between the power logic voltage stabilizing circuit and the nonlinear trigger circuit.

[0020] Wherein, the described constant current circuit is the key point of the present invention, as figure 2 As shown, it includes operational amplifier P2, operational amplifier P3, field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, triode Q3, and triode Q4.

[0021] In order to achieve the expected effe...

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Abstract

The invention discloses a hybrid triggering type driving power source for a power system fault detector. The hybrid triggering type driving power source mainly comprises a diode rectifier U, a nonlinear trigger circuit connected with the diode rectifier U, a buffering crystal oscillator circuit and a quartz crystal oscillator circuit, wherein the buffering crystal oscillator circuit and the quartz crystal oscillator circuit are connected with the nonlinear trigger circuit. The hybrid triggering type driving power source is characterized in that a power logic voltage-stabilizing circuit is connected between the diode rectifier U and the nonlinear trigger circuit and mainly comprises a power amplifier P1, an NAND gate IC1, an NAND gate IC2, an NAND gate IC3, an NAND gate IC4 and a diode D2, wherein the N pole of the diode D2 is connected with the output end of the power amplifier P1 and the P pole of the diode D2 is grounded after passing through a resistor R4. According to the hybrid triggering type driving power source, the circuit structure can be greatly simplified, radio-frequency interference of the circuits and radio-frequency interference of external connection can be lowered, and the manufacturing cost and the maintenance cost are greatly lowered.

Description

technical field [0001] The invention relates to a switching stabilized voltage power supply, in particular to a constant current hybrid trigger driving power supply for a power system fault detection device. Background technique [0002] At present, with the rapid development of the power industry, the equipment that people use for power system fault detection has also developed greatly. Since the maintenance of the power system often involves voltage lines of hundreds of kilovolts or even millions of kilovolts, the maintenance lines are very long, so the power supply requirements for fault detection equipment are also very high. However, at present, the mobile power supply provided by the fault detection equipment has a relatively large defect, that is, it is susceptible to electromagnetic interference, causing its working current to be unable to maintain a constant value, thus affecting the detection effect of the fault detection equipment to a large extent. , unable to m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M1/44
CPCH02M1/14H02M7/217
Inventor 周云扬
Owner CHENGDU CHUANGTU TECH
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