One-way thyristor full condition monitor

A monitor and full-state technology, applied in the field of control, can solve the problems of poor anti-strong magnetic interference, complicated equipment connection, etc., achieve intuitive display, solve complicated wire connections, and be suitable for online monitoring

Active Publication Date: 2019-02-01
田红卫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the working state of the silicon controlled rectifier can only be monitored through computer serial communication. The disadvantage is that the resistance to strong magnetic interference is poor, and the monitoring circuit is powered by wires, and the equipment connection is complicated.
At present, there is no real applicable unidirectional thyristor full state monitor

Method used

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  • One-way thyristor full condition monitor

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Embodiment Construction

[0012] The present invention will be further described below using the accompanying drawings and examples.

[0013] refer to figure 1, the unidirectional thyristor full-state monitor of the present invention includes: a conduction angle indicating circuit 1, a power supply circuit 2, a power switching circuit 3, a high-frequency signal generating circuit 4, and a unidirectional thyristor working state detection and alarm circuit 5. The overheat detection circuit 6 is electrically connected to the infrared alarm circuit 7 . The conduction angle indicating circuit 1 includes a diode D0, a resistor R0 electrically connected to a magnetoelectric DC voltmeter V0. The unidirectional conductivity of the diode D0 ensures that only the forward voltage of the one-way thyristor, that is, when the anode A potential of the one-way thyristor is higher than the cathode K potential, can be applied to the magnetoelectric DC voltmeter through the resistance R0. Magnetoelectric DC voltmeter ha...

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Abstract

The invention provides a unidirectional thyristor full state monitor, which is characterized in that the monitor comprises a conduction angle indication circuit, a power supply circuit , a power supply switching circuit, a high-frequency signal generation circuit, a unidirectional thyristor working state detection and alarm circuit, an overheat detection circuit and an infrared alarm circuit. The advantages are that during the period when a unidirectional thyristor bears a reverse voltage, power is input on the spot automatically without complex wires, so that the unidirectional thyristor full state monitor is especially suitable for large number of middle / large-power electric power conversion devices; and by outputting a high-frequency signal to the two ends of the unidirectional thyristor to enable power supply transformer coils connected to cathode and anode of the unidirectional thyristor to generate enough inductive reactance under a uncharged state, working current of the monitor is greatly reduced, and the monitor is allowed to realize miniaturization, and can carry out full state detection on the unidirectional thyristor, so that the monitor makes full state monitoring of a large number of unidirectional thyristors in the middle / large-power electric power conversion devices practicable and feasible.

Description

technical field [0001] The invention relates to the field of control, and is a one-way thyristor full-state monitor. Background technique [0002] In the prior art, the working state of the silicon controlled rectifier can only be monitored through computer serial communication. The disadvantages are that the resistance to strong magnetic interference is poor, and the monitoring circuit is powered by wires, and the equipment connection is complicated. The prior art is really just a routine overheating detection for the Triac. Since the number of one-way thyristors used in medium and high-power power conversion equipment is dozens or even hundreds, in most cases, in order to reduce equipment wiring, the independent overheat detection of each one-way thyristor is cancelled. , the one-way thyristor is basically in a non-detection state. At present, there is no really applicable one-way thyristor full state monitor. Contents of the invention [0003] The purpose of the pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/26
CPCG01R31/2637
Inventor 田红卫
Owner 田红卫
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