CN2310385Y

CN2310385Y - Electricity-saving type ac contactor

Info

Publication number: CN2310385Y
Application number: CN 97236918
Authority: CN
Inventors: 陈其寿; 翟耀诚
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-27
Filing date: 1997-08-27
Publication date: 1999-03-10
Anticipated expiration: 2007-08-27

Abstract

The utility model relates to an electricity saving type AC contactor. The centre of an E-shaped iron core is provided with an electromagnetic coil, and a movable attracting plate is connected with the movable E-shaped iron core into a whole; pole shoes attract with the attracting plate, a constant magnet is arranged between the left and the right pole shoes, a bucking coil which is arranged at the upper part of each of the pole shoes is connected with a capacitance releaser. The electromagnetic attracting coil only needs to be electrified from the switching off of the AC contactor to the switching on for working of the AC contactor, and is free from the influence of the voltage fluctuation of an electric net, so that the service life of the electromagnetic attracting coil is enhanced. When the utility model is used, the contact dynamic force of a movable and a static contacts comes from the attracting force of the magnetic field of a constant magnet, so that the service lives of the movable and the static contacts can be improved. The electromagnetic attracting coil does not need to be electrified, and the utility model has the advantages of electricity saving, running without heat and sound, etc.

Description

The electricity-saving type A.C. contactor

The utility model relates to a kind of electricity-saving type A.C. contactor.

The A.C. contactor of various series, extremely be widely used in electric power system, no matter be power supply department, industrial and mining enterprises, agricultural, traffic, commercial, all use all uses in a large number of field of alternating current national defence etc., its quantity whole nation reaches several hundred million, because A.C. contactor adopts E sections core to power up the start of magnetic zygonema circle, fixed, the contact power of contact, thereby as long as A.C. contactor work, the electromagnetism pull-in winding just has electric current to pass through, it must consume certain electric energy, and with the difference of the big low capacity of A.C. contactor, its pull-in winding consumes energy from tens watts (VA) to several hectowatts (VA), so just there is the electric energy of hundreds of hundred million degree (KVA) every year in the whole nation by invisible slatterning, and can produce noise and thermal pollution environment.

The purpose of this utility model is the defective at above-mentioned existence, proposes a kind of electricity-saving type A.C. contactor.

Technical solution of the present utility model:

Include E sections core 1, be provided with solenoid 2 in the centre of E sections core, movable suction disc 3 fuses with movable E sections core 7, pole shoe 4 holds suction disc 3, establish permanent magnet 5 in the centre of left and right pole shoe 4, be provided with bucking coil 6 on the top of pole shoe 4, bucking coil 6 connects capacitor discharger 9.

Advantage of the present utility model:

(1), this A.C. contactor connects the working electromagnet pull-in winding and only needs the moment energising from being disconnected to, and is not subjected to the influence of electric guiding principle voltage fluctuation, improved electromagnetism pull-in winding useful life.

(2), during this A.C. contactor operate as normal, the contact power of moving, fixed, contact, suction from permanent magnet magnetic field, this tries hard to keep and holds weighing apparatus and help improving the life-span moving, fixed, the contact surely, the electromagnetism pull-in winding need not be switched on simultaneously, therefore save a large amount of electric energy, realized no hot silent running, environment purification.

(3), reduce inductive loads in a large number in the electric guiding principle, thereby improved the power factor of the electric guiding principle of powering.

(4), this A.C. contactor except that above-listed characteristics, also possess the over-all properties of existing A.C. contactor, and compact conformation, long service life etc.

Accompanying drawing 1 is a structural representation of the present utility model.

Accompanying drawing 2 is electric former existing figure of releasing capacitor of the present utility model.

Among the figure 1 is E core, the 2nd, and solenoid, the 3rd, suction disc, the 4th, pole shoe, the 5th, permanent magnet, the 6th, bucking coil, the 7th, movable E sections, the 8th, A.C. contactor, the 9th, capacitor discharger, QA are the logical switches of power supply, TA is that power supply disconnects pass, CJ _O1Be the A.C. contactor solenoid, Jc ₂Be the auxiliary relay coil, JC ₃It is bucking coil.A.C. contactor solenoid voltage is 380V, only needs will receive the on line reconfiguration of B phase to center line when solenoid voltage is 220V.

Below in conjunction with accompanying drawing operation principle of the present utility model is described:

Press knob down switch QA (power supply is logical), solenoid 2 (CJ _O1) instantaneous energising produces suction and drive suction disc 3 and move downward by pole shoe 4 and suck; Release button switch QA A.C. contactor enters operating state, realizes no energy consumption silent running; By electrical schematic diagram as can be known, CJ _O1Energising, mains switch K ₁Connect CJ _O1-1Auxiliary contact by often open become normally closed, diode D ₁-D ₄Rectification, rectified current is by auxiliary relay coil Jc ₂To capacitor C ₁Charging, Jc simultaneously ₂Adhesive makes contact JC _2-1Open by normally closed often becoming.

Press down switch TA (power supply is disconnected) diode D ₁-D ₄Dead electricity does not have rectified current output, auxiliary relay Jc ₂Reset contact Jc _2-1Return to normally closedly by often opening, make capacitor C ₁Connect capacitor C with bucking coil 6 ₁Just by bucking coil JC ₃Discharge, its discharging current produces and permanent magnet 5 opposite polarity magnetic fields, makes pole shoe 4 top losss of excitation, and suction disc 3 is released, K switch ₁Disconnect the work of A.C. contactor stop.

Chain control: this A.C. contactor possesses normally closed, and the input interface of normal opened contact is for the usefulness of chain control.

Claims

1, electricity-saving type A.C. contactor, include E sections core (1), be provided with solenoid (2) in the centre of E sections core (1), it is characterized in that movable suction disc (3) and movable E sections core (7) fuse, pole shoe (4) holds suction disc (3), establish permanent magnet (5) in the centre of left and right pole shoe (4), be provided with bucking coil (6) on the top of pole shoe (4), bucking coil (6) connects capacitor discharger (9).

2, electricity-saving type A.C. contactor according to claim 1 is characterized in that capacitor discharger (9) is by bridge rectifier, auxiliary relay coil Jc ₂, capacitor C ₁Form the diode D in the bridge rectifier ₁Anode connect mains switch TA, QA, diode D ₁, D ₂Negative terminal connect the auxiliary relay line and scratch Jc ₂An end, auxiliary relay coil Jc ₂The other end and diode D ₃, D ₄Anode between be connected in series capacitor C ₁, diode D ₄Negative terminal succeed electrical equipment CJ _O1Contact CJ _O1-1.