CN87208809U

CN87208809U - Energy-saving ac contactor

Info

Publication number: CN87208809U
Application number: CN 87208809
Authority: CN
Inventors: 郝绍伟; 赵国江
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-06-04
Filing date: 1987-06-04
Publication date: 1988-08-10

Abstract

The utility model discloses an energy-saving AC contactor (relay), and the still iron core and the attraction magnet coil of the energy-saving AC contactor are fixed on a base. A moving arm, a moving contact, a permanent magnet and a soft iron core are connected together to from a moving part which is supported on the base by a return spring. The current direction of the attraction magnet coil is altered after the attraction magnet coil being electrified, and two magnetic fields with different directions can be produced. The magnetic fields mutually attract or repel the magnetic field of the permanent magnet, which makes the contactor attracted and switched off. The contactor is charged instantly in the process of switching over and does not consume electricity and produce heat and noise in load running.

Description

Energy-saving AC contactor

The utility model is the uncharged A.C. contactor that is in operation, and also is applicable to relay.

The A.C. contactor of current use is when sucking coil is switched on, the contactor adhesive, and the sucking coil outage discharges.A.C. contactor is in service charged all the time in the energising of Be Controlled electrical equipment, and it has not only consumed electric energy but also produce heat and electromagnetic noise, has shortened useful life.

The purpose of this utility model provides a kind of energy-saving alternating current contactor, and it is only switched on when Shun of load circuit closure or disconnection, and not power consumption when load running.

Energy-saving alternating current contactor has some groups of main contacts, auxiliary contact, (often opening each one group at least of auxiliary contact and normally closed auxiliary contact);

Fixed contact, static iron core, attraction solenoid are fixed on the pedestal.

Lever arm, moving contact, permanent magnet, soft iron core are associated in and constitute movable part together, and it is supported on the pedestal by return spring.Change and attract solenoid electrical current direction, can produce the D.C. magnetic field of two kinds of different directions, the magnetic field interaction of D.C. magnetic field and permanent magnet promptly attracts or repels, soft iron core is strengthened their interaction force, under this effect, make contactor adhesive or release, contactor is only switched on during Shun in handoff procedure, and adhesive keeps attracting state by permanent magnet to the suction of the iron core that attracts solenoid.It after the release support maintenance off-state by return spring.Therefore the contactor no power that is in operation is in operation and does not produce heat and noise, the useful life of the A.C. contactor that not only economized on electricity but also prolonged.

Describe the structure and the working condition of the specific embodiment that proposes according to principle of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is a kind of energy-saving alternating current contactor structure principle chart.Lever arm 1, buffer spring 3, moving contact 4, annular permanent magnnet 7, protruding truncated cone-shaped soft iron core 6 are solidified as a whole, and form dynamic component movable up and down.

Fixed contact 5, mountain font iron core 9, attraction solenoid 2, pedestal sidewall 10 are fixed on the pedestal 11.

Return spring 8 is supported on dynamic component on the pedestal 11.

When starting, press starting switch 17, alternating current is by rectifier diode 16 rectifications, normally closed auxiliary contact 14 through attracting solenoid 2 and this contactor constitutes the starting current loop, attract solenoid 2 to inhale mutually with permanent magnet 7, make the contactor adhesive with the D.C. magnetic field that on mountain font iron core 9, forms.Because the effect of soft iron core, make the interaction reinforcement that attracts D.C. magnetic field that solenoid 2 produces and the magnetic field of permanent magnet.After the adhesive, lean on the suction of the iron core 9 of 7 pairs of belt coils 2 of permanent magnet to keep adhesive.Under attracting state, the normally closed auxiliary contact of this contactor 14 disconnects, and the starting current loop is blocked, and has both made by starting switch 17 again, attracts solenoid also not have again electric current to pass through.

During shutdown; press stop botton 15; often open auxiliary contact 13 be in operation be the place closure state; alternating current is by auxiliary contact 13; rectifier diode 12 rectifications; through sucking coil 2 and stop botton 15; form shutdown circuit; on mountain font iron core 9 and attract to form on the solenoid 2 D.C. magnetic field opposite during with startup; repel each other with permanent magnet 7, contactor discharges, under the support of return spring 8; movable part returns to the origin-location, contactor is remained on lose the state of putting.

When power failure occurring operating a switch suddenly, the suction because of between permanent magnet 7 and the mountain font iron core 9 can not make contactor lose at once and put, and at this moment stop botton (with lock) can be locked, and form shutdown circuit this moment, and during incoming call, it will shut down automatically.

Energy-saving alternating current contactor has the effect of general A.C. contactor, can insert various types of circuit, is the thermal protection circuit connection as Fig. 2, and 18,19 is the normally-closed contact and the normally opened contact of hot protective relay.

Claims

1, a kind of energy-saving alternating current contactor, it main contact is arranged and have one group of normally closed auxiliary contact 14 at least and one group often open auxiliary contact 13; Fixed contact 5, attraction solenoid 2, static iron core 9 are fixed on the pedestal, it is characterized in that lever arm 1, moving contact 4, soft iron core 6, permanent magnet 7 are associated in together, constitute dynamic component, are supported on the pedestal by return spring 8;

Start-up circuit is by starting switch 17, and rectifier diode 16, solenoid 2, normally closed auxiliary contact 14 are formed;

Shutdown circuit is formed by often opening auxiliary contact 13, rectifier diode 13, solenoid 2 and stop botton 15 with lock.

2, contactor according to claim 1 is characterized in that permanent magnet 7 is annular, and soft iron core 9 is protruding truncated cone-shaped.