A Test System for Obtaining the Working State of Thyristor

Abstract

The invention discloses a test system for obtaining the working state of a thyristor, the structure of which is: the two ends of the Rogowski coil are respectively connected to the sampling resistance R through the interface. T Both ends are connected to the input terminal of the rectifier circuit through a double-core shielded wire, the output terminal of the rectifier circuit is connected to the input terminal of the amplifying circuit, the output terminal of the amplifying circuit is connected to the input terminal of the comparison circuit, and the output terminal of the comparison circuit is connected to the photoelectric The input end of the isolation circuit is connected, the output end of the photoelectric isolation circuit is connected with the input end of the logic processing circuit, the output end of the logic processing circuit is connected with the input end of the electro-optical conversion circuit, the output end of the electro-optical conversion circuit is connected with the input end of the photoelectric conversion circuit The output end of the photoelectric conversion circuit is connected with the data processor. The invention can quickly and reliably monitor the operation state of the thyristor and its components, ensure the normal operation of the thyristor, has strong anti-magnetic interference capability, simple structure, light weight, low cost and strong interchangeability.

Description

technical field [0001] The invention belongs to power electronics technology, and specifically relates to a testing system for the working state of a thyristor and its combined switch body (including a resistance-capacitance absorption module), which can conveniently detect open-circuit faults or short-circuit faults of the thyristor and its components, and transmit The status information of the thyristor is uploaded to the relevant controller to provide control instructions for related operations such as blocking the thyristor drive pulse to ensure safe and reliable operation of the thyristor. This test system is especially suitable for monitoring the fault status of thyristor rectifiers, thyristor AC valves, thyristor components, linear motor segmental power supply switching devices and uploading status information. Background technique [0002] At present, power electronics technology has developed to a very high level. High-voltage and high-power power electronic devices...

AI Technical Summary

Problems solved by technology

However, at present, there are very few commercial thyristor driver boards that monitor the entire operating status of the thyristor, or only contain some functions, such as overcurrent monitoring and / or short circuit monitoring and / or open circuit monitoring, etc.

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