CN86107007A

CN86107007A - Power-saving magnetodynamic contactor

Info

Publication number: CN86107007A
Application number: CN 86107007
Authority: CN
Inventors: 郑传圣
Original assignee: Shandong Yidou Development Sicience And Technology Allied Co; Qingzhou Wanjia Univeral Electric Equipment Factory
Current assignee: Shandong Yidou Development Sicience And Technology Allied Co; Qingzhou Wanjia Univeral Electric Equipment Factory
Priority date: 1986-10-29
Filing date: 1986-10-29
Publication date: 1987-12-16
Also published as: CN86107007B

Abstract

A kind of power-saving magnetodynamic contactor that is used for the electric power electric control system.

Contactor construction novelty of the present invention is made easily; It is at the run duration that keeps the controlled circuit closure, and itself is consumed power not.Compare with the electromagnetism adhesive freeze mode contactor that the past is traditional, has super energy conservation characteristic, startup is impacted, vibration is little, the run duration noiseless, excitation system is not generated heat, and AC and DC can be general, accommodation to the mains voltage variations amplitude is very wide, shock-resistant, anti-vibration performance good, sealing, dustproof, explosion-proof performance is good, suitable application area extensively waits excellent characteristics.

Description

Power-saving magnetodynamic contactor

Contactor is huge at the consumption of electric power electric control system.No matter the electromagnetism freeze mode contactor that past is traditional is that exchange, direct current or be called " silent running ", all keeps its place's running status by Electromagnetic Drive and by the electromagnetism the suction-combining force.They all must consume certain electric energy at the run duration that keeps the controlled circuit closure, also often produce noise or heating simultaneously; Their mechanical shock and vibrations when starting are all very fierce.

The technical purpose of power-saving magnetodynamic contactor of the present invention mainly is that traditional contactor of past is all saved at the electric energy that run duration consumed that keeps the controlled circuit closure, has not both had any sound at run duration itself simultaneously and has not also produced heat; Shock and vibration during also with Contactor Starting are reduced to gratifying degree.

Structure and operation principle:

Contactor of the present invention mainly is made of magnet rotor drive system [DT, CT], pulse capacitor [C], rectifier [ZL], main passive irreversible drive system [LG and LM or LB and BG] and sound contact sets.(asking for an interview Fig. 1 and Fig. 2 structural representation).Mainly the permanent magnet rotor [CT] between the palm of electromagnet stator [DT] the two poles of the earth is constituted the magnet rotor drive system by electromagnet stator [DT] and device.Main passive irreversible drive system, shown in Figure 1 a kind of in, be by with the screw rod [LG] of magnet rotor [CT] coaxial rotation with can do axial motion and the nut [LM] that can not rotate is constituted; Shown in Figure 2 a kind of in, constituted by spiral plate [LB] and armature contact with matching interlock fork [BG] with magnet rotor [CT] coaxial rotation.

The driving of contactor of the present invention and drive system fundamentally are different from traditions of the past type contactor, are a kind of creation.

The operation principle of contactor driving mechanism of the present invention (seeing Fig. 3 driving mechanism operation principle schematic diagram) is, under the unexcited condition of electromagnet stator [DT], because the magneticaction of permanent magnet rotor [CT], CT must locate the location status shown in Fig. 3 A between the palm of the two poles of the earth of DT.We claim that this state is first hold mode of permanent magnet rotor [CT].A logical forward dc power supply in our magnet exciting coil [L] at DT, and when making the magnetic polarity identical (shown in Fig. 3 B) of electromagnetism polarity that DT produces and CT, CT can rotate by the direction shown in the arrow among the figure, when the electromagnetism polarity of magnetic polarity that reaches CT shown in Fig. 3 C and DT is different till.As CT during at the state that is between DT the two poles of the earth palms shown in Fig. 3 C, we remove the field power supply of DT, and after the electromagnetic force of DT disappeared, because the magneticaction of CT, the relative position state of CT between the palm of DT the two poles of the earth still kept (shown in Fig. 3 C) constant.We claim that this state is second hold mode of CT.

Under CT place second hold mode, we give the magnet exciting coil [L] of DT a logical reverse DC power supply again, even electromagnetism polarity magnetic polarity with the CT that is in second hold mode shown in Fig. 3 D that DT produces is identical, CT will be by the direction wraparound shown in the arrow among Fig. 3 D, when the electromagnetism polarity of magnetic polarity that reaches the CT shown in Fig. 3 E and DT is different till.We remove the field power supply of DT, make after the electromagnetic force of DT disappears, and the relative position state of CT between the palm of DT the two poles of the earth still keeps (shown in Fig. 3 E) constant.-this state is again first hold mode of CT.……

This magnet rotor drive system by the main passive irreversible transmission mechanism of a foregoing cover, drives its service position state of armature contact conversion, just can realize and finish the function of contactor closure or disjunction controlled circuit.Here, generally be to utilize second hold mode of CT to make closure, and utilize first hold mode of CT to do disjunction.

During design, the corner that CT comes and goes must generally be taken between 120 °～160 ° less than 180 °, so that obtain less start-up time of constant and high as far as possible action sensitivity.

The stroke of contactor armature contact of the present invention, after the corner of CT is determined, shown in Figure 1 a kind of in, be that the pitch by screw rod that matches [LG] and nut [LM] decides; Shown in Figure 2 a kind of in, be that the helical pitch by spiral plate that matches [LB] and fork [BG] decides, and the suitable adjustment by corresponding mechanism, its stroke can be enlarged or dwindle.

Because the drive system of contactor of the present invention, has aforesaid service position state self-retaining function, so, it in practicality just when driving its functional executive system-armature contact conversion service position state, it just need almost be flashy excitation electric energy, and during keeping it to locate a kind of operating state, do not need, also consumed power just not.

The simple method of one instantaneous unidirectional pulse excitation electric energy is provided here, is exactly a series connection capacitor [C] in field circuit.Ask for an interview Fig. 4.When change over switch K dialled to a, C made DT obtain a direct impulse exciting current through magnet exciting coil [L] charging; CT makes forward rotation.After C institute charging voltage rose to supply voltage, the charging process of C finished, and no longer includes electric current among the L.After this, we dial change over switch K to b, and C just by the L discharge, flows through a reverse exciting current among the L of DT, make CT make backward rotation.Treat to charge among the C can put after, just no longer include electric current among the L.

Contactor of the present invention is compared with the existing contactor that we are referred to as the electromagnetism freeze mode, unique excellent characteristics and performance be:

1. energy-saving characteristic.

Contactor of the present invention only needs a pulse electric energy in a flash what start, and because this contactor does not have back-moving spring, energy needed consumption is just very little during startup; After the startup, at the run duration that keeps controlled circuit closure (or disjunction), not consumed power.

2. startup is impacted, vibrates little.

Because drive system is not collided parts or position, so, except a bit very little contact sound of contact sets, there is not the sound of other impacts, vibration during startup.

3. run duration noiseless.

At the run duration that keeps controlled circuit closure (or disjunction), because consumed power not itself, but against the service position state self-sustaining operation that drives with drive system, so also just do not produce the condition and the factor of noise.

4. moving therebetween excitation system does not generate heat.

The run duration excitation system is consumed power not, does not also just have heat to produce.

5. AC and DC can flexiblely be suitable for.

With regard to same contactor of the present invention, both be applicable to AC power, also be applicable to DC power supply.

6. very wide to the accommodation of mains voltage variations amplitude.

The conversion of armature contact service position (closure or disjunction), be to realize by the direction that changes excitation pulse current, so, supply voltage changes in a sizable scope, functional service behaviour to contactor of the present invention, do not have much influences, especially be higher than the variation of the supply voltage of nominal operation magnitude of voltage.Under the prerequisite of the withstand voltage permission of used electric elements, up to the mains voltage variations of 1.5～2 times of nominal operation voltages, or be lower than the mains voltage variations of nominal operation voltage 50%, it can both adapt to.

7. shock-resistant, anti-vibration performance is good.

Since in transmission adopted main passive irreversible mechanism, so its armature contact engages with fixed contact, will not be because of being subjected to the mechanical shock that external cause causes or vibration is become flexible or tripping.

8. sealing and dustproof, explosion-proof performance are good.

Because the heat that do not produce in service, so give sealing, dustproof, the explosion-proof condition of having created.

9. suitable application area is extensive.

Because unique aforementioned 8 excellent characteristics and performance, it is not only applicable to whole fields that electromagnetism freeze mode contactor is suitable for, but also will be in practicality, application for contactor, open that the electromagnetism freeze mode contactor of unprecedented more wide technical field-especially pass by can't relate to, require ultralow power consumption, peace and quiet and do not allow the field that heat produces.

Symbol and code name in this Figure of description are respectively:

DT-electromagnet stator;

The L-excitation coil of electromagnet;

The CT-permanent magnet rotor;

The C-pulse capacitor;

The ZL-rectifier;

LG-is screw rod initiatively;

The passive nut of LM-;

LB-is spiral plate initiatively;

The passive fork of BG-;

N, S-magnetic pole;

The JCZ-power-saving magnetodynamic contactor;

JCZ _1,2-power-saving magnetodynamic contactor contact;

The JX-miniature relay;

JX _1,3-miniature relay is often opened (moving closing) contact;

JX ₂-miniature relay normally closed (moving disconnected) contact;

The K-single-pole double-throw switch (SPDT);

The ANQ-start button;

The ANT-stop button;

～-AC power.

Embodiment:

1. the single-pole double-throw switch (SPDT) control method is asked for an interview Fig. 4.When K dialled to a, because the charging of C provides a direct impulse field power supply for contactor JCZ of the present invention, JCZ often made as forward drive and opens (moving closing) closing of contact (as the adhesive of traditions of the past type contactor); When K dialled to b, the C discharge provided a reverse impulse field power supply to JCZ, and JCZ makes closed normally opened contact disjunction (discharging as traditional contactor of past) as reverse drive.

2. the push-button switch control method is asked for an interview Fig. 5.Press start button ANQ, C charging, JCZ closure, JCZ simultaneously ₁Connect, make C after ANQ unclamps, still be in charged state.When needing the JCZ disjunction,, the charging circuit of C is cut off as long as press ANT, just and make C pass through the L discharge of JCZ can.

3. miniature relay cooperates control method to ask for an interview Fig. 6.This control method can make contactor of the present invention and in the past electromagnetism freeze mode contactor, has identical effect and function on practical way and method.JX starts, JX ₂Disconnect JX ₁Connect JCZ closure in the C charging; JX discharges, JX ₁Disconnect JX ₂Connect JCZ disjunction in the C discharge.This just realized when power supply stop for the time JCZ also function of disjunction voluntarily.

Claims

1, a kind of power-saving magnetodynamic contactor that is used for the electric power electric control system is characterized in that it is made of magnet rotor drive system, main passive irreversible drive system, quiet moving contact group, pulse capacitor and rectifier.

2,, it is characterized in that mainly the permanent magnet rotor [CT] between this electromagnet stator [DT] the two poles of the earth palm is constituted described magnet rotor drive system by electromagnet stator [DT] and device according to claim 1 described economize on electricity contactor.

3, according to claim 1 described economize on electricity contactor, it is characterized in that the passive irreversible drive system of described master, an end [LG or LB] that is driven by permanent magnet rotor [CT] is a driving mechanism, an end [LM or BG] that drives the armature contact action is a driven member, and the passive relation of the master on this transmission agency can not be reciprocal.

4,, it is characterized in that the described pulse capacitor [C] and the magnet exciting coil [L] of electromagnet stator [DT] are in series according to claim 1 described economize on electricity contactor.

5, a kind of power-saving magnetodynamic contactor that is used for the electric power electric control system, it is characterized in that this contactor only in needing in a flash of driving and consume a pulse electric energy, and keep at it that run duration of controlled circuit closure or disjunction does not need, yet consumed power not.