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Thermal protection circuit of thyristor

A thyristor and thermal protection technology, applied in emergency protection circuit devices, circuit devices, emergency protection devices with automatic disconnection, etc., can solve problems such as high temperature of thyristors, burning out of thyristors, accidents, etc., to save energy and reduce circuit power Consumption, improve the effect of processing speed

Inactive Publication Date: 2017-09-01
合肥联信电源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of operation, due to long-term work, the temperature of the thyristor may be too high, and the thyristor may be burned out, resulting in accidents in circuit operation.

Method used

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  • Thermal protection circuit of thyristor
  • Thermal protection circuit of thyristor

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] Such as Figure 1-2 As shown, a thyristor thermal protection circuit is provided in this embodiment, including:

[0031] Power supply circuit 1, temperature detection circuit 2, temperature signal processing circuit 3, proportional integral circuit 4, voltage comparison circuit 5 and signal drive circuit 6;

[0032] The power supply circuit 1 is electrically connected to the temperature signal processing circuit 3 and the proportional integral circuit ...

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Abstract

The invention discloses a thermal protection circuit of a thyristor. The thermal protection circuit comprises a power supply circuit, a temperature detection circuit, a temperature signal processing circuit, a proportional integral circuit, a voltage comparison circuit and a signal driving circuit. According to the technical scheme of the thermal protection circuit of the thyristor, due to the arrangement of a hardware detection circuit and a signal processing circuit, the thyristor can be timely cut off when the temperature is abnormal. Therefore, the thyristor is prevented from being burnt. The temperature abnormality processing speed is effectively improved and the processing time is reduced. A fault signal is generated timely and explicitly, and the thermal protection performance of the thyristor is greatly improved. The circuit has relatively high practical value and wide application prospect.

Description

technical field [0001] The invention relates to the technical field of thyristor protection, in particular to a thyristor thermal protection circuit. Background technique [0002] Thyristor (Thyristor) is the abbreviation of thyristor, also known as silicon controlled rectifier, previously referred to as thyristor; in 1957, General Electric Company of the United States developed the world's first thyristor product, and in 1958 it will be Its commercialization; the thyristor is a PNPN four-layer semiconductor structure, which has three poles: anode, cathode and gate; the thyristor has the characteristics of a silicon rectifier device, can work under high voltage and high current conditions, and its working process can be controlled, It is widely used in electronic circuits such as controllable rectification, AC voltage regulation, non-contact electronic switch, inverter and frequency conversion. It is a typical device for controlling large current with small current. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/04
CPCH02H5/042
Inventor 李多山
Owner 合肥联信电源有限公司
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