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Constant current symmetrical trigger-type driving power supply for power system fault detecting device

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

Inactive Publication Date: 2015-08-26
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 symmetrical trigger drive power supply for power system fault detection devices

Method used

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  • Constant current symmetrical trigger-type driving power supply for power system fault detecting device
  • Constant current symmetrical trigger-type driving power supply for power system fault detecting device

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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 main quartz crystal oscillator circuit and a secondary quartz crystal oscillator circuit connected with the nonlinear trigger circuit, and a diode rectifier connected in series It is composed of a power logic voltage regulator circuit between U and the non-linear trigger circuit. In order to achieve the purpose 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 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 desired effect, the constant c...

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Abstract

The invention discloses a symmetric transmission type driving power source for a power system fault detecting device. The symmetric transmission type driving power source is characterized by mainly comprising a diode rectifier U, a nonlinear trigger circuit, a main quartz crystal oscillator circuit, an auxiliary quartz crystal oscillator circuit and a power logic voltage stabilizing circuit; the nonlinear trigger circuit is connected with the diode rectifier U, the main quartz crystal oscillator circuit and the auxiliary quartz crystal oscillator circuit are connected with the nonlinear trigger circuit, and the power logic voltage stabilizing circuit is arranged between the diode rectifier U and the nonlinear trigger circuit in a serial connection manner; the power logic voltage stabilizing circuit comprises a power amplifier P1, an AND-NOT gate IC1, an AND-NOT gate IC2, an AND-NOT gate IC3, an AND-NOT gate IC4, an N (negative) pole and the like, and the N pole is connected with an output end of the power amplifier P1. The symmetric transmission type driving power source has the advantages that the power logic voltage stabilizing circuit and the nonlinear trigger circuit are creatively combined with each other, accordingly, circuit structures can be greatly simplified, radio frequency interference of the circuits and external radio frequency interference can be reduced, and the manufacturing cost and the maintaining cost can be greatly lowered.

Description

technical field [0001] The invention relates to a switching stabilized voltage power supply, in particular to a constant current symmetrical 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...

Claims

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Application Information

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