CN85100193B - Self-holding electromagnetic contactor - Google Patents
Self-holding electromagnetic contactor Download PDFInfo
- Publication number
- CN85100193B CN85100193B CN85100193A CN85100193A CN85100193B CN 85100193 B CN85100193 B CN 85100193B CN 85100193 A CN85100193 A CN 85100193A CN 85100193 A CN85100193 A CN 85100193A CN 85100193 B CN85100193 B CN 85100193B
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- China
- Prior art keywords
- contactor
- current
- jlc
- disjunction
- general purpose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000005389 magnetism Effects 0.000 claims abstract description 8
- 239000000696 magnetic material Substances 0.000 claims abstract description 7
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 5
- 229910000677 High-carbon steel Inorganic materials 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 2
- 230000005291 magnetic effect Effects 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 230000005347 demagnetization Effects 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 230000004907 flux Effects 0.000 description 5
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Relay Circuits (AREA)
Abstract
A self-holding electromagnetic contactor. The contactor iron core is changed into semi-hard magnetic material, the contactor is attracted by direct current pulse current, only residual magnetism maintains the attraction state, and the contactor can be released after demagnetization is carried out by direct current pulse current with proper magnitude and reverse direction. The semi-hard magnetic material is martensite magnetic steel. Because the current for maintaining the attraction is saved, the energy can be saved, the magnet exciting coil is not burnt, the noise is avoided, the manufacturing cost is reduced, and the working reliability is improved.
Description
The invention is a kind of electric power switch unit, particularly a kind of general purpose big-and-middle-sized self-closing electromagnetic contactor.
General purpose big-and-middle-sized electromagnetic contactor is being kept make position, must supply with constantly exciting current to the electromagnet of operation usefulness, so that contactor keeps attracting state.Consumed like this electric energy, the heat that gives out burns magnet exciting coil easily, has reduced dependability, and produces electromagnetic vibration noise easily.People have made extensive efforts in order to overcome these shortcomings.
A scheme that comparatively extensively adopts is, contactor kept the excitation AC stream that adhesive uses become direct current with diode rectification, reduced like this eddy current and the magnetic hysteresis loss in the iron core, and saves energy reduces heating, avoids noise.But the control circuit more complicated has affected the further raising of reliability.
In Japan clear 56-900 patent of invention is arranged.This patent is to insert a permanent magnet in magnetic excitation circuit, when stopping to supply with exciting current with dc pulse current after with the armature adhesive, the magnetic flux that relies on permanent magnet to produce is kept adhesive, when magnet exciting coil is supplied with suitable big or small reciprocal dc pulse current, the magnetic flux of permanent magnet is cancelled, contactor is just by disjunction, although this scheme has overcome the shortcoming that general contactor exists.But needing increases a permanent magnet, has strengthened overall dimension, and manufacturing cost improves, and is unfavorable for producing in enormous quantities.
On the 30th～68 page of " motor engineering handbook " the 5th volume (power transmission and transforming equipment) that China China Machine Press publishes nineteen eighty-two, list contactor and derived from kind table (table 30.5-2), at length introduce various contactor kinds, wherein also introduced the remanent magnetism contactor.It is to make iron core with the ferromagnetic material of high-coercive force, and magnet exciting coil namely cuts off the power supply after the energising adhesive, and contactor utilizes left magnetic effect to keep adhesive, not power consumption during work, dependable performance, noiselessness.But because the high-coercive force ferromagnetic material is expensive, this contactor can only be made low capacity, uses in automatic control system, and in general purpose big-and-middle-sized contactor, does not also have so far this remanent magnetism contactor.
Task of the present invention provides a kind of general purpose big-and-middle-sized electromagnet contactor, and it can overcome general electromagnetic contactor power consumption, heating, noisy shortcoming, and easy, reliable, cheap.
The invention is achieved in that the soft magnetic material (being generally silicon steel sheet) that operation electromagnet in the general purpose big-and-middle-sized electromagnetic contactor is used, and changes to adopt half retentive material.Its control mode is to make the contactor closure with dc pulse current, remanent magnetism by semi-hard magnetic material after switching current disappears maintains closure state with contactor, when passing into the opposite direction pulse current of suitable size, after the semi-hard magnetic material demagnetization, contactor can discharge.
Semi-hard magnetic material can be done diversified selection, the invention select to be rich in martensitic in or high-carbon steel.Carbon steel produces martensite through Quenching Treatment, and it has the Hard Magnetic characteristic.Medium carbon steel (phosphorus content is 0.25～0.6%) and high-carbon steel (phosphorus content is more than .6%) are along with the increase of phosphorus content, residual magnetic flux density (Br) is down to about 6000 Gausses by 11000 Gausses, and coercive force (Hc) is risen to about 70 oersteds by 20 oersteds.Take No. 45 carbon steels as example, Br is roughly 10500 Gausses, and Hc is 30 oersteds.Because its Hc is smaller, can not use in a lot of occasions, therefore often ignored by people.But this material is used in the invention and is well suited for.In this device, magnetic circuit very long (about about 20～40 centimetres), and air gap very little (about 0.1 millimeter), the remanent magnetism that this coercive force produces has enough used.On the contrary, if the coercive force of magnet is excessive, make to discharge difficulty.The high remanent induction intensity that this material has can make under certain magnetic circuit cross section and produce bigger the suction-combining force.A shortcoming of this material is the growth along with age, and magnetic has certain decay, and this also is the reason that people ignore it.As long as this decay is left enough stockages is can not cause adverse consequences, easy to process, the price of magnet steel cheap is a very outstanding advantage, uses it that this installation cost is descended greatly, is fit to a large amount of production in this device.
Below in conjunction with drawings and Examples the invention is further described.
Figure one is the contactor schematic diagram.(1), (2) are the contacts that control power circuit break-make is used among the figure, (3) be the spring that returns armature (4) usefulness, (6) be fixed core, (5) be magnet exciting coil, (7) be often to open auxiliary contact, (10) be normally closed auxiliary contact, it obtains delay breaking characteristics about 0.02 second by spring (8) and weight (9).
Figure two is one of ac contactor control circuits.QA is push button among the figure, and B1, B2, B3 are diodes, and R1, R2 are current-limiting resistances, and JLC-1, JLC-2 are auxiliary contact (among the figure one (7), (10)), and LQ is magnet exciting coil (among the figure one (5)).
Figure three is two of ac contactor control circuits.This circuit is identical with figure two circuit, but increases R3 current-limiting resistance, C1 capacitor, B4 diode, under voltage relay coil JQ and its contact J-1.
Figure four is contactor armature and the magnetic hysteresis loop of iron core ((4), (6) among the figure one) when make position.A, b, c, o are each working points among the figure.
When utilizing figure two to make control circuit, press push button QA, circuit consists of path by QA → B1 → R1 → JLC-1 → LQ, and LQ magnet exciting coil (5) flows through big switching current makes armature (4) by adhesive, and contact (1), (2) closure are finished the connection task.The B3 diode is that LQ consists of a path when the power-half cycle, has had it can strengthen the suction-combining force, crosses when strong at the suction-combining force that it can omit.The magnetic state in the iron core is a point (figure four) before the outage after adhesive.Adhesive postponed by 0.02 second, and after iron core was fully magnetized, auxiliary contact JLC-1 was with circuitry cuts, and attract current disappears, and relies on carbon steel remanent magnetism to keep the attracted position, and magnetic state unshakable in one's determination this moment moves to b point (figure four).When pressing disjunction button TA, circuit consists of path by TA → B2 → R2 → JLC → 2 → LQ, flow through the branch brake current by the right quantity of R2 control among the LQ, at this moment C point (figure four) is shifted in magnetic state, the magnetic flux trend disappears, suction weakens greatly, effect lower armature at spring (3) separates with fixed core, in case occur separating air gap, magnetic flux more reduces, strengthened centrifugation, contact (1), (2) are left under armature drives, and finish the disjunction task, follow by JLC-2 circuitry cuts, separating brake current vanishes, magnetic state move to 0 point (figure four).
Figure three is another control circuit of A.C. contactor.It duplicates in figure two, but has increased a under voltage release portion.A.C. contactor is normally in service, capacitor C
1On be filled with high voltage, the enough energy of contain, when supply voltage disappears, C
1On the voltage rapid decrease, electric current reduces among the coil JQ of under voltage relay, relay is released, J-1 closure, C
1To the LQ discharge, demagnetized in contactor iron core (4), (6), and armature discharges immediately.In some circuit, according to technological requirement, when electric current suddenly disappears and should cut off circuit, can adopt this control circuit.
By front as can be known described, new contactor is to rely on remanent magnetism to keep closure state, need not exciting current, thereby have energy-conservation, advantages such as heating burnout coil, noiseless not.
The overall dimension of this new contactor can be identical with the overall dimension of original contactor, and this is more convenient than Japanese clear 56-900 patent of invention in the standardization that realizes design, makes, uses.Owing to saved a permanent magnet, it is unshakable in one's determination to have selected magnet steel to do, and greatly reduces manufacturing cost, is applicable to general purpose big-and-middle-sized contactor.
In people life and producing, when interrupting once in a while, power supply wishes sometimes that mains switch do not want automatic disjunction, in order to can in time recover electricity consumption when sending a telegram here subsequently, reduce operation.In this occasion, original contactor is automatically disjunction owing to lose exciting current, uses inconvenient.In this occasion, change and use the new contactor of making by figure two control circuits just greatly convenient.
Automatic switch does not generally adopt operation electriomagnet power, because inconvenience is used in its automatic disjunction of meeting when instantaneous power-off, and the manual or electric motor operated power of its general employing.Automatic switch can select the invention to operate power now, and such electrical equipment not only can have contactor function but also can have auto-switch function, has realized a New Combined Switchgear.
Claims (3)
1, a kind of general purpose big-and-middle-sized contactor, its iron core and armature are made of half-hard magnetic material, utilize the remanent magnetism of this material to keep closure and form self-closing electromagnetic contactor, it is characterized in that: A, iron core and armature adopt be rich in martensitic in or high-carbon steel make; The control mode of the control winding of B, this contactor is: make the contactor closure by DC pulse, only behind the reverse impulse that passes into suitable size, contactor is discharged.
2, according to the described general purpose big-and-middle-sized contactor of claim 1, it is characterized in that the circuit design that satisfies the control mode of said control winding is: push button (QA) and diode (B
1), current-limiting resistance (R
1), can postpone auxiliary normally closed contact (JLC-1), magnet exciting coil (LQ) series connection of left and right sides disjunction in 0.02 second, with the diode (B in parallel with JLC-1, LQ
3) form the combined floodgate circuit, by disjunction button (TA) and diode (B
2), resistance (R
2), auxiliary normal opened contact (JLC-2), magnet exciting coil (LQ) be composed in series opening circuit, and select B
1, B
3, and B
2Polarity make switching current and separating brake opposite current.
3, according to the described general purpose big-and-middle-sized contactor of claim 2, it is characterized in that the auxiliary normally closed contact that has to obtain postponing about 0.02 second disjunction by spring and weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100193A CN85100193B (en) | 1985-04-01 | 1985-04-01 | Self-holding electromagnetic contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100193A CN85100193B (en) | 1985-04-01 | 1985-04-01 | Self-holding electromagnetic contactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100193A CN85100193A (en) | 1987-01-31 |
| CN85100193B true CN85100193B (en) | 1987-11-18 |
Family
ID=4790964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85100193A Expired CN85100193B (en) | 1985-04-01 | 1985-04-01 | Self-holding electromagnetic contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85100193B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320657B (en) * | 2008-07-17 | 2011-05-11 | 深圳市宝安任达电器实业有限公司 | Energy-saving environment-friendly type contactor |
| CN101499356B (en) * | 2008-10-31 | 2013-01-09 | 王国强 | Position feedback type DC driving method and apparatus |
| CN103258688A (en) * | 2012-02-16 | 2013-08-21 | 高建忠 | Anti-explosion reactive power contactor |
-
1985
- 1985-04-01 CN CN85100193A patent/CN85100193B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100193A (en) | 1987-01-31 |
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