CN2148383Y

CN2148383Y - Electronic non-arcing controller for contactor

Info

Publication number: CN2148383Y
Application number: CN 93201863
Authority: CN
Inventors: 徐正敏; 狄瑞琴
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-03
Filing date: 1993-02-03
Publication date: 1993-12-01
Anticipated expiration: 2003-02-03

Abstract

The utility model relates to an electronic non-arcing controller for the contactor, which is a device enabling the contactor not to arc in the contact head when being switched on and off. The electronic non-arcing controller for the contactor comprises three controlled silicon and a contact loop, and is provided with a protective circuit for the controlled silicon forming a three phase triggering loop. The electronic non-arcing controller for the contactor is provided with three pairs of lead-out wires transversely connected to both ends of three static contacts between the load and the moving contact of the contactor. The generated trigger signal can trigger the controlled silicon to be conducted instantly. When the contactor is switched on, the controlled silicon is conducted earlier than the contact head; when the contactor is switched off, the controlled silicon can be switched off later than the contact head. Thus, the utility model does not arc, extends the service life of the contact head, and prevents various inconvenience caused by arcing.

Description

Electronic non-arcing controller for contactor

The electronics that the utility model relates to a kind of contactor does not have the arc controller, is a kind of controller that makes contactor contact when " opening " or " pass " not produce electric arc.

Contactor is a kind of magnetic switch, and when " opening " and " pass ", contact inevitably can produce electric arc.Voltage is higher, and the big more then electric arc of electric current is also big more.The electric arc harm that is produced is very big, not only can burn out contact, can cause fire when having inflammable thing to coexist a Room, causes serious accident, and life and property are incurred loss.Can produce level to the instrument of automatic control in addition and disturb, influence the normal detection of instrument.In existing technology, there are all kinds of arc-extinguish chambers to stop electric arc, but can not fundamentally prevent the generation of electric arc.

The purpose of this utility model is: the electronics that designs a kind of contactor does not have the arc controller, makes the moment of contactor when " opening " or " pass " not produce electric arc.

Scheme of the present utility model is as follows: SCR1, SCR2, three bidirectional triode thyristors of SCR3 and circuits for triggering IC1 form three-phase triggering loop and have three pairs of lead-in wires; be connected across the two ends of three pairs of fixed contacts of contactor respectively, three-phase triggering loop is established the protection loop and is used to prevent that controllable silicon is breakdown.This three bidirectional triode thyristors and the three-phase triggering loop of triggering the loop composition, the signal of telecommunication that the three-phase triggering signal that produces " is opened " or exported when " pass " when contactor can trigger controllable silicon in the moment conducting, because the controllable silicon ON time contacts conducting early than the contact, can be early than the contact conducting when " opening ".The signal that circuits for triggering send when " pass " can be kept at short notice, can turn-off when being later than the contact disconnection.So can make the contact not produce electric arc.A complete set of circuit need only add three and protect fusible links and three to prevent that controllable silicon from being got final product by the piezo-resistance that back electromotive force punctures except that three bidirectional triode thyristors and circuits for triggering module.The The whole control circuit is simple, and cost is low, and is easy to use, " opens " at contactor, prevents effectively when " breaking " that electric arc from producing.The utility model can be made module and the supporting use of contactor, also can make the arc-extinguish chamber form.Be applicable to all contact switches.

The drawings and Examples explanation:

Fig. 1 is a composition diagram of the present utility model.Fig. 2 is for making the module outline drawing.Fig. 3 is the connection layout of the utility model and peripheral switch and load.

The end of bidirectional triode thyristor SCR1, SCR2, SCR3 all is connected in series a fusible link RL1, RL2, RL3, and the other end is that the T1 end of SCR1-3 all connects triggering loop IC1.Three silicon controlled two ends each and meet piezo-resistance R1, a R2, R3; Trigger loop IC1 and use the CD9201 module.RL1, RL2, RL3 are overcurrent protection, and R1, R2, R3 can prevent that the back electromotive force that inductive load produces from making bidirectional triode thyristor breakdown when turn-offing.No arc controller has three pairs of lead-in wires, is respectively A-D, B-E, C-F.From drawing first pair of lead-in wire with the A end of the fusible link RL1 of SCR1 serial connection and the T1 end of SCR1, the common point D of IC1, R1.Draw second pair of line from B end and T1, the IC1 of SCR2, the common point E of R2, draw the 3rd pair of lead-in wire from common point F with the C end of the RL3 of SCR3 serial connection and SCR3, IC1, R3 with the fusible link RL2 of SCR2 serial connection.

Only drawing three pairs of lead-in wires when making module gets final product (as shown in the figure).

Trigger loop IC1 and can use, also can use auxiliary contact control to trigger from triggering loop (as CD9201), if the control of this auxiliary contact trigger make cross-over connection controllable silicon when switch early than the contact conducting, when turn-offing, be later than the contact and turn-off and get final product.

When being connected with load, three pairs of lead-in wires of made module SCRCD9201 are connected across the two ends of three fixed contact CJK1, CJK2, CJK3 respectively, and load is a motor among Fig. 3, and CJK4, CJ, K1, K2 are the starting switch of motor M.

Claims

1; the electronics of contactor does not have the arc controller; it is characterized in that above-mentioned no arc controller is by three bidirectional triode thyristor loops with trigger loop IC1 and form; above-mentioned three bidirectional triode thyristor SCR1; SCR2; the two ends of SCR3 are connected in series three fusible link RL1 that are used for overcurrent protection respectively; RL2; RL3; the two ends of above-mentioned three bidirectional triode thyristors respectively and meet piezo-resistance R1; R2; R3; one end is SCR1; SCR2; the T1 end of SCR3 all is connected with triggering loop IC1; above-mentioned no arc controller has three pairs of lead-in wires; respectively from the A end of RL1 and the T1 end of SCR1; IC1; the common point D of R1; the B end of RL2 and the T1 end of SCR2; IC1; the common point E of R2; the C end of RL3 and the T1 end of SCR3; IC1; the common point F of R3 draws; be respectively: A-D; B-E; C-F, three pairs of lead-in wires are connected across three fixed contact CJK1 respectively; CJK2; the two ends of CJK3.

2, the electronics of contactor according to claim 1 does not have the arc controller, it is characterized in that above-mentioned triggering loop can be for triggering loop (CD9201) certainly.

3, contactor electronics according to claim 1 does not have the arc controller, it is characterized in that above-mentioned triggering loop can for the control controllable silicon when switch leaves early than the contact conducting, be later than the auxiliary contact that turn-off the contact during shutoff and form.