CN202058650U

CN202058650U - Special-purpose micro-power contactor of electric shock security system

Info

Publication number: CN202058650U
Application number: CN2011200747806U
Authority: CN
Inventors: 季世顺; 张春荣
Original assignee: JIANGSU ZHONGJIN ELECRIC EQUIPMENT CO Ltd
Current assignee: JIANGSU ZHONGJIN ELECRIC EQUIPMENT CO Ltd
Priority date: 2011-03-21
Filing date: 2011-03-21
Publication date: 2011-11-30
Anticipated expiration: 2021-03-21

Abstract

The utility model discloses a protective circuit device, and specifically discloses a special-purpose micro-power contactor of an electric shock security system. The special-purpose micro-power contactor includes a contactor control module. An alternating current input part of the contactor control module is connected with an alternating current power supply via a normally open protective switch B2 which is controlled by an electric shock protector. When the contactor control module outputs the forward direction direct current, the magnetic field polarity of a magnetic coil enables an iron core to repel a permanent magnet and breaks a contact point of the contactor. When the contactor control module outputs the backward direction direct current, the magnetic field polarity of the magnetic coil enables the iron core to attract the permanent magnet and closes the contact point of the contactor. When the magnetic coil is not passed through by the current, the permanent magnet and the iron core are attracted with each other. In the operation of the electric shock security system, the special-purpose micro-power contactor of the electric shock security system not only can maintain an excellent working performance, but also can save the power resources.

Description

The little power consumption contactor of electric shocked guard system-specific

Technical field

The utility model relates to a kind of protective circuit device, the little power consumption contactor of specifically a kind of electric shocked guard system-specific.

Background technology

Along with the continuous development of China's power industry and the raising of living standards of the people, electric power is more and more important in people's production and life, for guaranteeing Electrical Safety, needs to use in a large number the electric shocked guard control system in power supply unit.The domestic matched main element A.C. contactor of electric shocked guard control system generally all is the maintenance of not cutting off the power supply after the adhesive of employing coil electricity at present, and ceaselessly power consumption for a long time causes a large amount of wastes of electric power resource.

Existing electric shocked guard control system use permanent magnet contactor, its principle as shown in Figure 1, it by be serially connected with normally closed protection switch B1 in the circuit, contactor control module, solenoid 3 ' and permanent magnet 4 ' etc. constitute.The ac input division of its contactor control module divides and connects AC power, and the direct current output of contactor control module connects solenoid, and the iron core of solenoid drives the disconnection and the closure of contactor main contacts; When the ac input division branch of contactor control module has the AC power input, its direct current output is exported DC Forward Current to solenoid, be provided with in the contactor control module simultaneously can energy storage when AC power is imported charging capacitor, when ac input division divides dc output end that charging capacitor when disconnecting with AC power can be by the contactor control module to the instantaneous reverse dc of solenoid output.The normally closed under normal conditions protection switch B1 of this electric shocked guard control system closure, the solenoid energising makes its iron core and permanent magnet adhesive, contacts of contactor 6 ' closure, and be in the hold mode of not cutting off the power supply; When supply line's short trouble takes place, by the normally closed protection switch B1 disconnection of earth leakage protector control, solenoid dead electricity; the anti-phase discharge of storage capacitor in the control module simultaneously; the direction of the winding current changes, and makes the iron core reversing and separates contacts of contactor 6 ' disconnection with permanent magnet.Adopt the contactor of this structure, the work energising because the electric shocked guard system is in the normal state the overwhelming majority time, electric power resource has been wasted in therefore ceaselessly power consumption for a long time.

Summary of the invention

The technical problems to be solved in the utility model provides and a kind ofly not only can keep the works fine performance, and the little power consumption contactor of electric shocked guard system-specific that can the conservation of power resource.

In order to solve the problems of the technologies described above, electric shocked guard of the present utility model system includes a contactor control module, the ac input division of contactor control module divides and connects AC power, the direct current output of contactor control module connects solenoid, the iron core of solenoid drives the disconnection and the closure of contacts of contactor, and coil one end is provided with permanent magnet; When the ac input division branch of contactor control module has the AC power input, its direct current output is exported DC Forward Current to solenoid, be provided with in the contactor control module simultaneously can energy storage when AC power is imported storage capacitor, when ac input division divides dc output end that storage capacitor when disconnecting with AC power can be by the contactor control module to the instantaneous reverse dc of solenoid output; The ac input division of described contactor control module divides through a protection switch B2 that often opens by earth leakage protector control and connects AC power; When contactor control module output DC Forward Current, the polarity of the magnetic field of solenoid is scolded out iron core and permanent magnet and is disconnected contacts of contactor; When contactor control module output reverse dc, the polarity of the magnetic field of solenoid makes iron core and permanent magnet adhesive and closed contacts of contactor; When the solenoid no current by the time permanent magnet and iron core can keep adhesive.

The beneficial effects of the utility model are embodied in: 1, the utility model can utilize original contactor control module; do not changing original manufacturing process, do not increasing under the condition of manufacturing cost and broken through the traditional electric shocked guard system and the mode of operation of contactor thereof; make that the circuit of solenoid and contactor control module is in the outage off position when normally moving in supply line, and only the fault that is short-circuited make earth leakage protector often open protection switch when closed contactor coil just switch on and disconnect supply line.Thereby greatly reduce the electric energy loss of electric shocked guard system when normally moving, the electric power resource of saving in supply line; 2, because the power supply of electric shocked guard system is in attracting state for a long time for contactor, legacy system adopts the electromagnetism adhesive to keep removing and also produces a large amount of heat energy when producing noise.And the utility model adopts the adhesive of permanent magnetism power to keep, and can guarantee that product is quiet, and the coil empty calory distributes; 3, traditional contactor adopts the electromagnetic force adhesive to keep, separating brake only depends on mechanical spring power, so opening velocity is slow, and be subjected to the influence of voltage ripple of power network bigger, and the utility model can adopt intellectual electronic circuit control, separating brake collection permanent magnetism power, electromagnetic force and mechanical force are finished jointly, speed up, and not influenced by voltage ripple of power network, one-time action is chatter not; 4, because divide-shut brake system (contactor solenoid) is in (outage) state of not working for a long time, the real in running order time is very short, just time moment, so the life-span of product can prolong greatly, really realizes non-maintaining; 5 in actual application, can not change the scheme and the secondary scheme of the former main circuit of traditional electric shocked guard system, makes it change that repacking is simple, speed is fast, is easy to apply.

Description of drawings

Fig. 1 is the contactor principle schematic of existing electric shocked guard system;

State principle schematic when Fig. 2 normally moves in supply line for the little power consumption contactor of the utility model electric shocked guard system-specific;

State principle schematic when Fig. 3 is short-circuited fault for the little power consumption contactor of the utility model electric shocked guard system-specific in supply line.

Embodiment

As seen from the figure; the little power consumption contactor of electric shocked guard system-specific of the present utility model comprises often opens protection switch B2, contactor control module, solenoid 3 and permanent magnet 4; often opening protection switch B2 controlled by the earth leakage protector in the system; when the normality of the normal operation of supply line, be in off-state; the contactor control module includes storage capacitor; its ac input division divides and connects AC power; the direct current output connects solenoid 3; solenoid 3 one ends are provided with permanent magnet 4, and permanent magnet 4 is in attracting state under normal conditions with the iron core 5 of solenoid.

Its operation principle is:

As shown in Figure 2; when supply line's fault takes place; during earth leakage protector electric leakage action; often open protection switch B2 closure, solenoid is identical with the abutting end polarity of the magnetic field of permanent magnet pole, and iron core 5 and permanent magnet are scolded out; contacts of contactor 6 carries out disjunction in the double action that electromagnetic force adds spring mechanical power; finish the power-off protection process, the storage capacitor of contactor control module charging at this moment finishes and is in little power consumption state, and the security system operating current is about 3mA.

As shown in Figure 3; when earth leakage protector is powered by time-delay or manual reversion; often open the protection switch B2 disconnection that resets; the storage capacitor of contactor control module carries out instantaneous anti-phase discharge to solenoid, has changed the polarity of solenoid, makes iron core 5 and permanent magnet adhesive; make the contacts of contactor closure; utilize the permanent magnetism of permanent magnet to keep adhesive simultaneously, be in power supply state, until the next one action of protector.The security system operating current is 0mA.

Claims

1. little power consumption contactor of electric shocked guard system-specific, include a contactor control module, the ac input division of contactor control module divides and connects AC power, the direct current output of contactor control module connects solenoid (3), the iron core of solenoid (5) drives the disconnection and the closure of contacts of contactor (6), and coil one end is provided with permanent magnet (4); When the ac input division branch of contactor control module has the AC power input, its direct current output is exported DC Forward Current to solenoid, be provided with in the contactor control module simultaneously can energy storage when AC power is imported storage capacitor, when ac input division divides dc output end that storage capacitor when disconnecting with AC power can be by the contactor control module to the instantaneous reverse dc of solenoid output; It is characterized in that: the ac input division of described contactor control module divides through a protection switch (B2) of often opening by earth leakage protector control and connects AC power; When contactor control module output DC Forward Current, the polarity of the magnetic field of solenoid is scolded out iron core (5) and permanent magnet (4) and is disconnected contacts of contactor (6); When contactor control module output reverse dc, the polarity of the magnetic field of solenoid makes iron core and permanent magnet adhesive and closed contacts of contactor; When the solenoid no current by the time permanent magnet and iron core can keep adhesive.