CN201117590Y

CN201117590Y - Constant magnetism holding alternating current contactor

Info

Publication number: CN201117590Y
Application number: CNU2007200450846U
Authority: CN
Inventors: 何兆龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-07
Filing date: 2007-11-07
Publication date: 2008-09-17
Anticipated expiration: 2017-11-07

Abstract

The utility model discloses a permanent magnetic latching AC contactor which includes a support, an upper iron core, lower iron cores, electromagnetic pull-in coils, bucking coils, a permanent magnetic body, a base, a reverse spring and a capacitance releaser. The upper iron core is fixed on the support and the lower iron core is arranged under the upper iron core. Two lower iron cores are arranged. The permanent magnetic body is arranged in the middle and is fixed on the base. The reverse spring is arranged between the base and the support. The bucking coil and the electromagnetic pull-in coil are sleeved on the two end surfaces of the lower iron cores. The bucking coil is connected with the capacitance releaser. The lower iron cores are the pole shores of the electromagnetic pull-in coil. The permanent magnetic latching AC contactor reduces the quantity of the bucking coils and the electromagnetic pull-in coils which are sleeved on the end surfaces of the lower iron cores, is provided with all functions of the present integrated noiseless AC contactor with tiny energy consumption and lowers the production cost.

Description

Constant-magnet remaining AC contactor

Technical field

The utility model relates to a kind of A.C. contactor.

Background technology

Existing A.C. contactor, because it adopts U type or E sections core to power up the start of magnetic zygonema circle, fixed contact contact power, 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 along with the difference of the big low capacity of A.C. contactor, its pull-in winding power consumption from several watts (VA) to several hectowatts (VA), so just there is the electric energy of several hundred million degree (during KVA/) every year in the whole nation by invisible slatterning, and noise and thermal pollution environment are arranged.Chinese patent ZL200420025887.1 proposes integrated non-noise AC contactor with very-low energy consumption, and its structure is that upper core is arranged, and upper core is fixed in the support, is lower core below upper core, and described lower core is two, the middle permanent magnet of placing; On four end face bodies of lower core, be with bucking coil and electromagnetism pull-in winding, bucking coil connects capacitor discharger, lower core is the pole shoe of permanent magnet, lower core is fixed on the base, between base and support the bounce-back spring is arranged, and has saved a large amount of electric energy, realize noiseless, heat operation, environment purification, but bucking coil and electromagnetism pull-in winding consumptive material are many, the cost height.

Summary of the invention

The purpose of this utility model is the defective at above-mentioned existence, proposes a kind of constant-magnet remaining AC contactor, and its structure is simpler, and related mould is changed seldom, is more conducive to a large amount of productions, and bucking coil and electromagnetism pull-in winding consumption are few, and cost is low.

Technical solution of the present utility model: constant-magnet remaining AC contactor, comprise support, upper core, lower core, the electromagnetism pull-in winding, bucking coil, permanent magnet, base, bounce-back spring and capacitor discharger, described upper core is fixed in the support, lower core is arranged on the below of upper core, described lower core is two, the centre is provided with permanent magnet, and be fixed on the base, be provided with the bounce-back spring between described base and support, be with bucking coil and electromagnetism pull-in winding on two end face bodies of described lower core, bucking coil connects capacitor discharger, and described lower core is the pole shoe of permanent magnet.

Described capacitor discharger, it comprises the bridge rectifier of being made up of diode D1-D4, current-limiting resistance R1, diode D5, capacitor C 1, controllable silicon BG1, the negative terminal of diode D2 in the bridge rectifier is connected in series with current-limiting resistance R1, diode D5, capacitor C 1, the negative electrode of the negative terminal of capacitor C 1 and controllable silicon BG1 joins, and the anode of controllable silicon BG1 connects bucking coil; The negative terminal of diode D5 in the capacitor discharger (7) and the anode of the diode D6 in the closed loop self-checking circuit join the negative terminal of the diode D6 in the closed loop self-checking circuit and bucking coil, switch DJ _1-1, resistance R 9, controllable silicon BG3 the trigger electrode serial connection; The anode of controllable silicon BG1 in the capacitor discharger and the controllable silicon BG2 anode in the insurance circuit join, insurance circuit is made up of diode D7, resistance R 8, controllable silicon BG2, mains switch TA, the anode of mains switch TA normal opened contact and diode D7, resistance R 8 are joined, the trigger electrode of the other end of resistance R 8 and controllable silicon BG2 joins, and the negative terminal of diode D7 connects bucking coil.

Advantage of the present utility model: reduced the bucking coil that is with on the lower core end face body and the consumption of electromagnetism pull-in winding, and possessed the repertoire of existing integrated non-noise AC contactor with very-low energy consumption, reduced production cost.

Description of drawings

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

Accompanying drawing 2 is electrical schematic diagrams of the present utility model.

In the accompanying drawing 1 is support, the 2nd, upper core, the 3rd, lower core, the 4th, pull-in winding, the 5th, bucking coil, the 6th, permanent magnet, the 7th, capacitor discharger, the 8th, base, the 9th, bounce-back spring.

Embodiment

Contrast Fig. 1, upper core 2 is arranged, upper core 2 is fixed on supports to be lower core 3 on 1 below upper core 2, it is divided into two, place permanent magnet 6 in the middle of it, be with bucking coil 5 and electromagnetism pull-in winding 4 on two end face bodies of lower core 3, bucking coil 5 connects capacitor discharger 7, and lower core 3 is pole shoes of permanent magnet 6, lower core 3 is fixed on the base 8, and

base

8 and 1 of support have bounce-back spring 9.

Contrast Fig. 2, described capacitor discharger 7, it comprises the bridge rectifier of being made up of diode D1-D4, current-limiting resistance R1, diode D5, capacitor C 1, controllable silicon BG1, the negative terminal of diode D2 in the bridge rectifier is connected in series with current-limiting resistance R1, diode D5, capacitor C 1, the negative electrode of the negative terminal of capacitor C 1 and controllable silicon BG1 joins, and the anode of controllable silicon BG1 connects bucking coil 5; The negative terminal of diode D5 in the capacitor discharger 7 and the anode of the diode D6 in the closed loop self-checking circuit join the negative terminal of the diode D6 in the closed loop self-checking circuit and bucking coil 5, switch DJ _1-1, resistance R 9, controllable silicon BG3 the trigger electrode serial connection; The anode of controllable silicon BG1 in the capacitor discharger 7 and the controllable silicon BG2 anode in the insurance circuit join, insurance circuit is made up of diode D7, resistance R 8, controllable silicon BG2, mains switch TA, the anode of mains switch TA normal opened contact and diode D7, resistance R 8 are joined, the trigger electrode of the other end of resistance R 8 and controllable silicon BG2 joins, and the negative terminal of diode D7 connects bucking coil 5.

The course of work:

The closed loop self-checking circuit, through being to hold the peak voltage of setting up on the C1 to be about 1.3 times of supply voltage behind the bridge rectifier, this voltage is added to the anode of controllable silicon BG1, BG2 by bucking coil 5.And by switch CJ _1-1The normally closed contact trigger voltage of resistance R 9 of feeding as controllable silicon BG3; When if capacitor discharger 7 and bucking coil 5 have fault not have direct voltage output, make supply voltage can not make its conducting even press knob down switch QA through the anode that pull-in winding 4 is added to controllable silicon BG3, A.C. contactor can't start, the operation principle of Here it is closed loop self-checking circuit.A.C. contactor could start when relevant elements such as bucking coil 5 are working properly only at capacitor discharger 7, otherwise will refuse starting, and this just effectively guarantees to discharge reliably.

Insurance circuit, insurance circuit is made up of the normal opened contact of diode D7, resistance R 8, controllable silicon BG2, mains switch TA, just in case A.C. contactor is when capacitor discharger 7 breaks down in the process of normally starting and can not instant-free.When discharging, needs need only by putting in place mains switch TA, normal opened contact is connected, supply voltage is delivered to controllable silicon BG2 anode through diode D7 and bucking coil 5, supplies with controllable silicon BG2 trigger electrode trigger voltage by diode R8 simultaneously, makes its conducting that A.C. contactor is discharged.

Normal release, press down mains switch TA (breaking), diode D1-D4 dead electricity does not have commutating voltage output, dead electricity on the capacitor C 2, controllable silicon BG1 obtains trigger voltage and conducting by resistance R 6 simultaneously, and capacitor C1 is just by bucking coil 5 discharges, its discharging current produces and the identical magnetic field of permanent magnet 6 polarity, according to principle of same-sex repulsion, pole shoe top loss of excitation and discharging, A.C. contactor quits work.

No matter the utility model amount of capacity continuous operation 1 year, power consumption less than 4 kilowatts/time 4 the degree, energy-saving effect is considerable, noiseless during work, the security reliability height, long service life simple in structurely is suitable for a large amount of productions, reduce the bucking coil that is with on the lower core end face body and the consumption of electromagnetism pull-in winding, reduced production cost.

Claims

1, constant-magnet remaining AC contactor, comprise support (1), upper core (2), lower core (3), electromagnetism pull-in winding (4), bucking coil (5), permanent magnet (6), base (8), bounce-back spring (9) and capacitor discharger (7), described upper core (2) is fixed in the support (1), lower core (3) is arranged on the below of upper core (2), described lower core (3) is two, the centre is provided with permanent magnet (6), and be fixed on the base (8), be provided with bounce-back spring (9) between described base (8) and support (1), it is characterized in that being with bucking coil (5) and electromagnetism pull-in winding (4) on two end face bodies of described lower core (3), bucking coil (5) connects capacitor discharger (7), and described lower core (3) is the pole shoe of permanent magnet (6).

2, constant-magnet remaining AC contactor according to claim 1, it is characterized in that: described capacitor discharger (7), it comprises the bridge rectifier of being made up of diode D1-D4, current-limiting resistance R1, diode D5, capacitor C 1, controllable silicon BG1, the negative terminal of diode D2 in the bridge rectifier is connected in series with current-limiting resistance R1, diode D5, capacitor C 1, the negative electrode of the negative terminal of capacitor C 1 and controllable silicon BG1 joins, and the anode of controllable silicon BG1 connects bucking coil (5); The negative terminal of diode D5 in the capacitor discharger (7) and the anode of the diode D6 in the closed loop self-checking circuit join, the negative terminal of the diode D6 in the closed loop self-checking circuit and bucking coil (5), switch DJ _1-1, resistance R 9, controllable silicon BG3 the trigger electrode serial connection; The anode of controllable silicon BG1 in the capacitor discharger (7) and the controllable silicon BG2 anode in the insurance circuit join, insurance circuit is made up of diode D7, resistance R 8, controllable silicon BG2, mains switch TA, the anode of mains switch TA normal opened contact and diode D7, resistance R 8 are joined, the trigger electrode of the other end of resistance R 8 and controllable silicon BG2 joins, and the negative terminal of diode D7 connects bucking coil (5).