CN2033943U

CN2033943U - Discharger without electric arc

Info

Publication number: CN2033943U
Application number: CN 88211900
Authority: CN
Inventors: 于兴根
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-06-14
Filing date: 1988-06-14
Publication date: 1989-03-08

Abstract

The utility model discloses a discharger without electric arc which is fit to be used to open and close alternating current by an electromagnetic relay. The utility model is formed by that a discharger without electric arc composed of a bidirectional thyristor, a transformer, a rectifier and a capacitor is increased in the circuit of an electromagnetic relay, the bidirectional thyristor is guided before the electromagnetic relay is closed, the electromagnetic relay is released before the bidirectional thyristor is closed, and the electromagnetic relay can open and close the alternating current without arc is realized.

Description

Discharger without electric arc

The utility model relates to a kind of no arc discharge device of electromagnetic relay break-make alternating current.

The normally open contact of existing electromagnetic relay arc discharge can occur when " leading to " " breaking " alternating current, though adopted arc control device, blow-out coil to limit and quicken arc extinction, electric arc still can make the contact burn and influence its useful life.Though solid-state relay break-make alternating current does not have electric arc, leakage current is big, and contact resistance is big, and the serviceability temperature scope is narrow, and overload capacity is poor.

The utility model provides a kind of no arc discharge device, does not have arc discharge when making the normally open contact break-make alternating current of electromagnetic relay, and leakage current is little during use, and overload capacity is big, and the life-span is long.

The utility model such as following mode are finished: primary feeds specified alternating current then at alternating current of secondary generation, be converted into direct current through rectification circuit and capacitor again; The G best T of the solenoid of electromagnetic relay and bidirectional triode thyristor ₁Series connection back energising in parallel between the utmost point with capacitor, its current value is the rated current of solenoid, also is about 4-7 times of bidirectional triode thyristor control utmost point G trigger current; The conducting of about 10 microseconds of bidirectional triode thyristor elder generation, closed after about 200 microseconds of electromagnetic relay contact.When the primary electric current turn-offs, electric energy original stored on the capacitor is just by loop time-delay discharge, when time-delay discharges into the electromagnetic relay release current, also is about 2～4 times of bidirectional triode thyristor control utmost point G trigger current, after time-delay discharges into the electromagnetic relay normally open contact and discharges.At this moment electric current is a not trigger current of bidirectional triode thyristor control utmost point G, realization is switched on closed behind the contact of magnetic relay by the bidirectional triode thyristor guide, discharge earlier the make and break process that turn-offs behind the bidirectional triode thyristor by electromagnetic relay, do not have arc discharge when making the normally open contact of electromagnetic relay " lead to " " breaking " alternating current.

Below in conjunction with accompanying drawing the utility model is set forth.

Fig. 1 is to use the example of single phase alternating current (A.C.) electromagnetic relay of the present utility model.

Fig. 2 is the utility model basic circuit diagram.

With reference to Fig. 1, Fig. 2, in the box that constitutes by insulation crust 5 and metallic plate 17, by dress electromagnetic relay 19, transformer 6, transformer 6 primary electrical connect binding post 1,2; Often open auxiliary contact 8 binding posts 3,4 in parallel; Transformer 6 secondary electrical connect rectifier 7 inputs, rectifier output end shunt capacitor 16; The T of binding post 12,14 normally open contacts 9 in parallel, bidirectional triode thyristor 15 ₁, T ₂The utmost point, the absorption circuit of forming by capacitor 11 series resistances 10; The G best T of the solenoid 13 of electromagnetic relay 19 and bidirectional triode thyristor 15 ₁Between the utmost point series connection back and capacitor 16 in parallel, form closed series circuit; The control utmost point G trigger current of bidirectional triode thyristor 15 is negative poles, also can is that anodal, the best is the negative pole trigger current.When inserting binding post 14, the load other end and terminal 12, load 18 feeds AC power, the specified ac supply signal of binding post 1,2 break-makes, can make the alternating current in the normally open contact 9 no electric arc break-make loads 18, a plurality of a kind of alternating current electromagnetic relays that arc discharge device is worked simultaneously, can be constituted corresponding heterogeneous no arc discharge device that do not have of the present utility model.

Claims

1, the electromagnetic relay of break-make alternating current.Particularly a kind of electromagnetic relay 19 is in conjunction with a kind of no arc discharge device: the RC that is connected into by solenoid 13, resistance 10 and the capacitor 11 of bidirectional triode thyristor 15, capacitor 16, rectifier 7, transformer 6, electromagnetic relay 19 absorbs circuit and forms, and it is characterized in that the solenoid 13 of electromagnetic relay 19 and the G best T of bidirectional triode thyristor 15 ₁Between the utmost point series connection back and capacitor 16 in parallel, form closed series circuit.

2, device according to claim 1, the control utmost point G trigger current that it is characterized in that bidirectional triode thyristor 15 are negative poles, also can are that anodal, the best is the negative pole trigger current.

3, device according to claim 1 is characterized in that a plurality of a kind of alternating current electromagnetic relays that arc discharge device is worked simultaneously, can be constituted corresponding heterogeneous no arc discharge device that do not have of the present utility model.