Thyristor triggering pulse signal detecting circuit

Abstract

The invention relates to a thyristor triggering pulse signal detecting circuit. A voltage at a primary winding side of a pulse transformer of a thyristor triggering circuit is collected through a voltage collecting circuit, and the collected voltage is sent to a pulse processing circuit for analyzing, a thyristor circuit connected with the thyristor triggering circuit in a current voltage is judged whether to operate normally, namely whether a short circuit or an open circuit occurs or not, so that a worker can make safety protection measures in time. Through the above thyristor triggering pulse signal detecting circuit, triggering pulse signal detection does not need to be directly performed in a thyristor, but through detecting a size of the voltage at the primary winding side of the pulse transformer of the thyristor triggering circuit, the thyristor circuit is indirectly judged whether to operate normally, namely whether a triggering pulse of the thyristor circuit is normal or not.Problems that triggering energy is consumed by direct measurement, and normal work of the thyristor circuit is affected are avoided from being generated.

Description

technical field [0001] The present application relates to the field of detection circuits, in particular to a thyristor trigger pulse signal detection circuit. Background technique [0002] Thyristor (Thyristor) is a thyristor, also known as a silicon controlled rectifier. Since a thyristor can work under high voltage and high current conditions, and its working process can be controlled, it is widely used in controllable rectification, AC In electronic circuits such as voltage regulators, non-contact electronic switches, inverters and frequency converters. In a large-scale excitation system, in order to ensure the power generation safety of the entire system, it is often necessary to set up a corresponding circuit to detect the pulse signal of the thyristor rectifier bridge of the excitation system, so as to take safety protection measures when the pulse is lost or abnormal. [0003] The traditional thyristor trigger pulse signal detection method is to collect the voltage ...

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Problems solved by technology

[0004] Based on this, it is necessary to provide a thyristor trigger pulse signal detection circuit for the problem that the traditional thyristor trigger pulse signal detection method will lead to unreliable operation of the thyristor.

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