CN1725411A - Permanent magnetic contactor and control device thereof - Google Patents
Permanent magnetic contactor and control device thereof Download PDFInfo
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- CN1725411A CN1725411A CN 200510040937 CN200510040937A CN1725411A CN 1725411 A CN1725411 A CN 1725411A CN 200510040937 CN200510040937 CN 200510040937 CN 200510040937 A CN200510040937 A CN 200510040937A CN 1725411 A CN1725411 A CN 1725411A
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Abstract
A permanent magnetic contactor and its control device are used in starting switch control devices and engines and switching on and off the master circuit. A permanent magnetic steel is set between two static cores to form a U-like bulk, two iron cores connected in series and in a same polarity, a tower spring supports the framework of the packet, the top of the tower spring is connected with a dynamic core. The output over voltage protection part of said control device is connected with the rectification part, output of which is connected with a low-voltage judgment part the output of which is connected with a shut off executing part and the output of which is connected with the wire packet.
Description
Technical field
The present invention relates to a kind of permanent magnetism type contactor, be used for switchgear, control appliance and motor starting, main circuit is carried out the on/off switch operation, belong to the technical field that contactor is made.
Background technology
Traditional contactor is to produce magnetic field by electromagnetic wire Bao Dedian, keeps the attracting state of contact.During the line bag energising adhesive, want consumed power on the one hand, operating current is big during owing to operation, and energy loss is on magnetic hysteresis, eddy current and short-circuited conducting sleeve, and the meritorious power consumption major part of line bag becomes heat and loses; On the other hand, can the line bag often take place burn phenomenon.Cross when low when supply voltage, electromagnetic force can significantly reduce; When the alternating current zero passage, under action of reset spring, judder can take place together with main contact in the moving iron core of contactor, not only can shorten the useful life of contactor, and can influence power supply reliability.
Permanent magnet contactor adopts permanent magnetism to keep, and the logical forward and reverse electric current of line bag is realized on/off switch.Line bag no power during the contactor adhesive, do not consume energy, avoided the line bag to burn phenomenon.Nd-Fe-B rare earth permanent magnetic material magnetic energy product height, the permanent magnetism of smaller size smaller can satisfy the requirement of the static confining force of contactor.China's rare earth permanent-magnetic material aboundresources, stable performance adopt the permanent magnet contactor of rare earth permanent magnet to be suitable for large scale application.
Summary of the invention
Technical problem; The purpose of this invention is to provide a kind of permanent magnet contactor and control device thereof, permanent magnet contactor is at run duration, and the line bag does not have the phenomenon of burning; Chattering can not take place in voltage ripple of power network, contact; Under under-voltage condition, cut off load automatically, realize under-voltage protection.
Technical scheme: for achieving the above object, permanent magnet contactor of the present invention adopts following technical scheme:
Contactor control device of the present invention is made up of overvoltage protection, under-voltage protection, outage operating part.
Between two static iron cores, be provided with a permanent-magnet steel, make two static iron cores and permanent-magnet steel form the integral body of " U " font, about a line bag is respectively arranged on two static iron cores, the connection that is in series between the two line bags, and polar orientation is identical; The tower spring supports on the skeleton of online bag; The upper end of tower spring links to each other with moving iron core.Moving iron core, static iron core are made by common electrical pure iron, and permanent-magnet steel adopts the NdFeB material of high energy product.
The control device of permanent magnet contactor of the present invention is made up of overvoltage protection part, rectifying part, under-voltage judgment part, outage operating part, line bag; The output of overvoltage protection part connects rectifying part respectively, the under-voltage judgment part of output termination of rectifying part, the output termination outage operating part of under-voltage judgment part, the output wiring bag of outage operating part.
On circuit structure, this control device connects the bridge rectifier that rectifier diode D1～D4 forms by piezo-resistance R1, and the output of rectification circuit links to each other with the positive pole of diode D5, D6, D7 respectively; The negative pole of diode D5 links to each other with capacitor C 1, resistance R 2, and resistance R 3, capacitor C 2, voltage stabilizing didoe D8 are connected in parallel between the grid and source electrode of VMOS pipe Q2; The negative pole of diode D6 links to each other with capacitor C 3, resistance R 4, and resistance R 5 is in parallel with the emitter two ends with the base stage of triode Q1, and the base stage of triode Q1 is connected between resistance R 4 and the resistance R 5; The negative pole of diode D7 is connecting resistance R6, resistance R 7, capacitor C 4 respectively, the other end of resistance R 6 connects with the collector electrode of triode Q1, the grid of voltage stabilizing didoe D9, the 2nd VMOS pipe Q3 respectively, resistance R 7 links to each other with the drain electrode of the 2nd VMOS pipe Q3, capacitor C 4 is connected with line bag J, the drain electrode of the one VMOS pipe Q2 links to each other with source electrode, the line bag J of the emitter of capacitor C 3, resistance R 5, triode Q1, voltage stabilizing didoe D9, the 2nd VMOS pipe Q3, source electrode that a VMOS manages Q2 and the negative pole that is pooled to rectifier bridge after voltage stabilizing didoe D8, capacitor C 2, resistance R 3, capacitor C 1 link to each other.
Beneficial effect: the present invention is designed for the permanent magnetism type contactor of low voltage switchgear, control appliance and motor starting according to GB14048.4-2003.Permanent magnet contactor is at run duration, and the line bag does not have the phenomenon of burning, and voltage ripple of power network, contact chattering can not take place.Under under-voltage condition, cut off load automatically, realize under-voltage protection.
The under-voltage outage scope of contactor of invention: exchange 20%～75%, can set according to actual needs.
The contactor advantage of described invention shows as: simple in structure, save material, and cost is low, energy consumption is little, has overvoltage and under-voltage protection function, the power down separating brake, breaking capacity is strong.
Description of drawings
Fig. 1 is the structural representation of contactor of the present invention; Wherein have: moving iron core 1, tower spring 2, line bag 3, static iron core 4, permanent-magnet steel 5.
Fig. 2 is the control circuit block diagram that is suitable for A.C. contactor.Wherein have: overvoltage protection part 61, rectifying part 62, under-voltage judgment part 63, outage operating part 64, line bag 65.
Fig. 3 is the control circuit schematic diagram that is suitable for A.C. contactor.
External AC power supply AC is arranged, stop button TA, starting button QA, contactor auxiliary contact J in the above circuit, piezo-resistance R1, diode D1～D7, voltage stabilizing didoe D8～D9, capacitor C 1～C4, resistance R 2～R7, triode Q1, a VMOS pipe Q2, the 2nd VMOS manage Q3, contactor line bag J.
Embodiment
Permanent magnet contactor of the present invention, form by moving iron core 1, static iron core 4, permanent-magnet steel 5, line bag 3, tower spring 2 and control circuit, it is characterized in that: between two static iron cores 4, be provided with a permanent-magnet steel 5, make the integral body of two static iron cores 4 and " U " font of permanent-magnet steel 5 formation, about a line bag 3 is respectively arranged on two static iron cores 4, the connection that is in series between the two line bags 3, and polar orientation is identical; Tower spring 2 supports on the skeleton of online bag 3; The upper end of tower spring 2 links to each other with moving iron core 1.Moving iron core 1, static iron core 4 are made by common electrical pure iron, and permanent-magnet steel 5 adopts the NdFeB material of high energy product.
As shown in Figure 1, during combined floodgate, the line bag leads to forward current, and is consistent with the magnet steel magnetic direction, and at this moment, magnet steel 5, static iron core 4, air gap, moving iron core 1 form magnetic circuit, and when suction during greater than resistance, moving iron core moves downward, and makes contact closure.During separating brake, the line bag leads to reverse current, and the magnetic potential of line packet generation is opposite with the magnetic potential of magnet steel, and when the counter-force of spring during greater than resistance, moving iron core moves upward, and drives contact and realizes separating brake.The dynamic and static iron core of the contactor of described invention is made by common electrical pure iron, substitutes the silicon steel sheet of common contactor, and volume is also corresponding to be reduced.Permanent-magnet steel adopts the NdFeB material of high energy product, can produce bigger static confining force.
The control device of permanent magnet contactor is made up of overvoltage protection part 61, rectifying part 62, under-voltage judgment part 63, outage operating part 64, line bag 65; The output of overvoltage protection part 61 connects rectifying part 62 respectively, the under-voltage judgment part 63 of the output termination of rectifying part 62, the output termination outage operating part 64 of under-voltage judgment part 63, the output wiring bag 65 of outage operating part 64.
The AC control circuit execution mode as shown in Figure 2.Piezo-resistance R1 connects the bridge rectifier that rectifier diode D1～D4 forms, and links to each other with the positive pole of diode D5, D6, D7 respectively again; The negative pole of diode D5 links to each other with capacitor C 1, resistance R 2, and resistance R 3, capacitor C 2, voltage stabilizing didoe D8 are connected in parallel between the grid and source electrode of VMOS pipe Q2; The negative pole of diode D6 links to each other with capacitor C 3, resistance R 4, and resistance R 5 is in parallel with the emitter two ends with the base stage of triode Q1, and the base stage of triode Q1 is connected between resistance R 4 and the resistance R 5; The negative pole of diode D7 is connecting resistance R6, resistance R 7, capacitor C 4 respectively, the other end of resistance R 6 is connected with the collector electrode of triode Q1, the grid of voltage stabilizing didoe D9, the 2nd VMOS pipe Q3 respectively, resistance R 7 links to each other with the drain electrode of the 2nd VMOS pipe Q3, capacitor C 4 is connected with line bag J, and the drain electrode of VMOS pipe Q2 links to each other with source electrode, the line bag J of the emitter of capacitor C 3, resistance R 5, triode Q1, voltage stabilizing didoe D9, the 2nd VMOS pipe Q3.The source electrode of the one VMOS pipe Q2 and the negative pole that is pooled to rectifier bridge after voltage stabilizing didoe D8, capacitor C 2, resistance R 3, capacitor C 1 link to each other.When controlling supply voltage in 85%～110% scope, press starting button QA, electric current is divided into three the tunnel.One road diode D5 that flows through, at this moment, Q2 drain electrode of VMOS pipe and the reliable conducting of source electrode; Another road diode D6 that flows through, the current potential on the resistance R 5 is raised, and makes triode Q1 be in conducting state, and the current potential of the collector terminal of triode Q1 is drop-down, makes Q3 drain electrode of the 2nd VMOS pipe and source electrode be in cut-off state; Last road flows to capacitor C 4 and line bag J through diode D7, on the one hand, to the electric capacity charging, is power down or under-voltage separating brake energy storage, and on the other hand, the electric current of the line bag of flowing through produces magnetic potential, and is consistent with magnet steel magnetic potential direction, makes contactor finish closing operation.When dead electricity or supply voltage in 20%～75% scope, the one VMOS pipe Q2 turn-offs, triode Q1 ends, the grid voltage of the 2nd VMOS pipe Q3 raises, the conducting of the 2nd VMOS pipe Q3 drain-source utmost point, and capacitor C 4 becomes discharge loop by resistance R 7, the 2nd VMOS pipe Q3, line bag J-shaped, line bag J produces the magnetic potential opposite with magnet steel, when the counter-force of spring during greater than resistance, moving iron core separates with static iron core, realizes sub-switching operation.
In addition, also can be E type structure, circular configuration etc., can implement according to actual needs, do not repeat them here about the embodiment of structure.
Claims (4)
1, a kind of permanent magnet contactor, it is characterized in that: between two static iron cores (4), be provided with a permanent-magnet steel (5), make two static iron cores (4) and a permanent-magnet steel (5) form the integral body of " U " font, about a line bag (3) is respectively arranged on two static iron cores (4), the connection that is in series between the two line bags (3), and polar orientation is identical; Tower spring (2) supports on the skeleton of online bag (3); The upper end of tower spring (2) links to each other with moving iron core (1).
2, permanent magnet contactor according to claim 1 is characterized in that: moving iron core (1), static iron core (4) are made by common electrical pure iron, and permanent-magnet steel (5) adopts the NdFeB material of high energy product.
3, a kind of control device that is used for the described permanent magnet contactor of claim 1 is characterized in that this control device is made up of overvoltage protection part (61), rectifying part (62), under-voltage judgment part (63), outage operating part (64), line bag (65); The output termination rectifying part (62) of overvoltage protection part (61); the under-voltage judgment part of output termination (63) of rectifying part (62); the output termination outage operating part (64) of under-voltage judgment part (63), the output wiring bag (65) of outage operating part (64).
4, the control device of permanent magnet contactor according to claim 3, it is characterized in that this control device connects the bridge rectifier that rectifier diode D1～D4 forms by piezo-resistance R1, the output of rectification circuit links to each other with the positive pole of diode D5, D6, D7 respectively; The negative pole of diode D5 links to each other with capacitor C 1, resistance R 2, and resistance R 3, capacitor C 2, voltage stabilizing didoe D8 are connected in parallel between the grid and source electrode of VMOS pipe Q2; The negative pole of diode D6 links to each other with capacitor C 3, resistance R 4, and resistance R 5 is in parallel with the emitter two ends with the base stage of triode Q1, and the base stage of triode Q1 is connected between resistance R 4 and the resistance R 5; The negative pole of diode D7 is connecting resistance R6, resistance R 7, capacitor C 4 respectively, the other end of resistance R 6 connects with the collector electrode of triode Q1, the grid of voltage stabilizing didoe D9, the 2nd VMOS pipe Q3 respectively, resistance R 7 links to each other with the drain electrode of the 2nd VMOS pipe Q3, capacitor C 4 is connected with line bag J, the drain electrode of the one VMOS pipe Q2 links to each other with source electrode, the line bag J of the emitter of capacitor C 3, resistance R 5, triode Q1, voltage stabilizing didoe D9, the 2nd VMOS pipe Q3, source electrode that a VMOS manages Q2 and the negative pole that is pooled to rectifier bridge after voltage stabilizing didoe D8, capacitor C 2, resistance R 3, capacitor C 1 link to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100409372A CN100392786C (en) | 2005-07-08 | 2005-07-08 | Permanent magnetic contactor and control device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100409372A CN100392786C (en) | 2005-07-08 | 2005-07-08 | Permanent magnetic contactor and control device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1725411A true CN1725411A (en) | 2006-01-25 |
| CN100392786C CN100392786C (en) | 2008-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100409372A Expired - Fee Related CN100392786C (en) | 2005-07-08 | 2005-07-08 | Permanent magnetic contactor and control device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007028321A1 (en) * | 2005-09-09 | 2007-03-15 | Jinping Liu | Low-power numerically controlled contactor and control system made of the contactors |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86209944U (en) * | 1986-12-06 | 1988-07-27 | 江苏省沛县自行车配件厂 | Ac contactor |
| CN2037499U (en) * | 1988-08-22 | 1989-05-10 | 梁正 | Contact maker by permanent magnet keep closing |
| CN2183032Y (en) * | 1994-01-13 | 1994-11-16 | 梅俊 | Energy saving dc connector |
| CN2826672Y (en) * | 2005-07-08 | 2006-10-11 | 东南大学 | Permanent-magnetic contactor and its control device |
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2005
- 2005-07-08 CN CNB2005100409372A patent/CN100392786C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007028321A1 (en) * | 2005-09-09 | 2007-03-15 | Jinping Liu | Low-power numerically controlled contactor and control system made of the contactors |
| US8093969B2 (en) | 2005-09-09 | 2012-01-10 | Jinping Liu | Low-power numerically controlled contactor and control system made of the contactors |
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| Publication number | Publication date |
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| CN100392786C (en) | 2008-06-04 |
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Granted publication date: 20080604 Termination date: 20130708 |