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Arc extinguishing device

A technology of arc extinguishing and devices, which is applied in the field of electricity, can solve the problems of easy burning of contacts, no arc extinguishing devices, large arc, etc., and achieve the effect of simple circuit, low driving energy consumption and small size

Active Publication Date: 2017-06-30
GUANGZHOU JINSHI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the electrical control system, mechanical switches such as relays and contactors are widely used to control the on-off of the load. Because there is no very effective arc extinguishing device, it has the disadvantage that the arc is large when the load is broken, and the contacts are easy to burn.

Method used

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Examples

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Embodiment Construction

[0024] Such as figure 2 Shown is a schematic circuit diagram of Embodiment 1 of the arc extinguishing device of the present invention, which includes a first electrode J1, a second electrode J2, a third electrode J3, a thyristor TR1, a first capacitor C1 (current limiting element), a first resistor R1, voltage stabilizing devices Z1, Z2 (two voltage stabilizing diodes are reversely connected in series, a bidirectional voltage stabilizing diode can also be used), current transformer CT1 and electronic switch (A), the first electrode J1 and the first end of the thyristor TR1 connection, the third electrode J3 is connected to the second end of the thyristor TR1, the second electrode J2 is connected to the second end of the thyristor TR1 through the current transformer CT1, the first electrode J1 and the second electrode J2 are used for the required arc extinguishing The mechanical switch SW1 is connected, the third electrode J3 is the common terminal of the current passing throu...

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Abstract

An arc extinguishing device, comprising a first electrode (J1), a second electrode (J2), a third electrode (J3), a thyristor (TR1), a current limiting element (C1), a current transformer (CT1) and an electronic switch (A); the first electrode (J1) is connected to a first end of the thyristor (TR1); the third electrode (J3) is connected to a second end of the thyristor (TR1); the second electrode is connected to a second end of the thyristor (TR1) via the current transformer (CT1); the first electrode (J1) and the second electrode (J2) are used to connect to a mechanical switch (SW1) requiring arc extinguishing; the third electrode (J3) is the common endpoint of currents passing through the thyristor (TR1) and the mechanical switch (SW1); the current transformer (CT1) detects the current passing through the mechanical switch (SW1); an output end of the current transformer (CT1) is connected to a control end of the electronic switch (A); a drive signal for driving the thyristor (TR1) to conduct is connected to a control electrode of the thyristor (TR1) by a first end or second end of the thyristor (TR1) via the current limiting element (C1, R1); and the electronic switch (A) is connected to the drive signal circuit. The above solution has a wide range of application.

Description

technical field [0001] The arc extinguishing device of the present invention belongs to the electrical field, in particular an arc extinguishing device used for arc extinguishing in mechanical switches such as contactors and relays. Background technique [0002] At present, in the electrical control system, mechanical switches such as relays and contactors are widely used to control the on-off of the load. Because there is no very effective arc extinguishing device, there is a disadvantage that the arc is large when the load is broken, and the contacts are easy to burn. Contents of the invention [0003] The object of the present invention is to invent an arc extinguishing device that can be conveniently used for arc extinguishing of mechanical switches such as relays, contactors, buttons, etc., and is small in size and low in cost. [0004] Realize that the object of the present invention is achieved by the following technical solutions: [0005] An arc extinguishing dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/30
CPCH01H9/30
Inventor 郭桥石
Owner GUANGZHOU JINSHI ELECTRONICS
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