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Trigger circuit for great power controlled silicon industrial frequency AC switch

A power frequency AC and trigger circuit technology, which is applied in the direction of electronic switches, electrical components, pulse technology, etc., can solve the problems of interfering with the normal operation of other circuits, and achieve the effect of not being easy to interfere, the circuit is simple, and the circuit is adjustable

Inactive Publication Date: 2010-05-12
天津华翔电气集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a strong magnetic field causes the surrounding conductors to generate voltage, and the surrounding conductor loops to generate current, thereby interfering with the normal operation of other circuits

Method used

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  • Trigger circuit for great power controlled silicon industrial frequency AC switch
  • Trigger circuit for great power controlled silicon industrial frequency AC switch

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Embodiment Construction

[0013] Below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure and features provided by the present invention are described in detail as follows:

[0014] see figure 1 , a trigger circuit for high-power thyristor power frequency AC switch, characterized in that: the circuit includes three parts;

[0015] The first part is the switching circuit part; including the first resistor R1, the second diode D2, the second resistor R2, the first diode D1, the first capacitor C1, the triode BG, the third resistor R3, and the first inverter U1A, the third diode D3;

[0016] The second part is the pulse oscillation circuit part; including the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the fourth diode D4, the fifth diode D5, the second capacitor C2, and the second inverter U1B , the third inverter U1C;

[0017] The third part is the output drive circuit part; including the fourth inverter U1D, the fifth...

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PUM

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Abstract

The invention relates to a trigger circuit used in high power SCR industrial frequency ac switch which is characterized by a switching circuit comprises resistances R1, R2, R3, diodes D1,D2,D3, capacitance C1, triode BG and a reverser U1A. The pulse osc which comprises resistances R4, R5, R6, diodes D4, D5, capacitance C2, reversers UIB, UIC is transited by D3. The pulse osc connects the driving circuit composed by reversers UID, UIE, UIF, resistances R7, R8, R9. The three circuits outputs parallely at the same time to trigger the SCR. The circuit is simple, reasonably designed and is more simplified in use and operation. The invention which is of low cost and low energy consumption and is not easy to interrupt other circuits or be interrupted by other circuits can be adjusted, has a stable and reliable performance and a wide scope of application.

Description

technical field [0001] The invention relates to a switch control circuit, in particular to a trigger circuit for a high-power thyristor power frequency AC switch. Background technique [0002] At present, when using high-power silicon controlled rectifiers, the pulse sent by the single chip microcomputer is often used as the trigger signal source of the silicon controlled silicon. However, the single-chip microcomputer is easily disturbed by electromagnetic interference sources or other reasons to cause it to crash or stop working, causing the thyristor not to be triggered, or to stop during the triggering process. In this way, not only the thyristor cannot work normally, but also the equipment controlled by the thyristor cannot operate normally. In particular, some devices require the thyristor to be turned on for a short time during the working process, for example, it is turned on for 200 milliseconds and then turned off. At this time, if the single-chip microcomputer i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/725H03K17/00
Inventor 韩永清张乃彦顾耀兴杨勇张耀军史慧龙
Owner 天津华翔电气集团股份有限公司