CN102473561A - Releasing type electromagnet device - Google Patents
Releasing type electromagnet device Download PDFInfo
- Publication number
- CN102473561A CN102473561A CN2009801601050A CN200980160105A CN102473561A CN 102473561 A CN102473561 A CN 102473561A CN 2009801601050 A CN2009801601050 A CN 2009801601050A CN 200980160105 A CN200980160105 A CN 200980160105A CN 102473561 A CN102473561 A CN 102473561A
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- China
- Prior art keywords
- plunger
- mentioned
- yoke
- iron core
- release
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
Abstract
Provided is a releasing type electromagnet device, in which a plunger weight is reduced by shortening a plunger length and by adding a stationary iron core but without reducing a plunger diameter. Moreover, a plunger inclination in a bobbin is reduced to eliminate the contact with an end yoke through hole. The plunger weight can be reduced without reducing the plunger diameter. As a result, it is possible to prevent the drop of an attraction force, which might otherwise be caused due to the reduction of an interlinking magnetic flux (or the radial reduction), and the reduction of a releasing operation efficiency, which might otherwise be caused by the increase of a magnetic resistance. By reducing the plunger inclination, the dispersions of the attraction force and a sliding frictional force are suppressed to improve releasing characteristics.
Description
Technical field
The present invention relates to a kind of for example as the release electromagnet device of the trip gear of circuit breaker.
Background technology
Release electromagnet device is following type by formations such as plunger (plunger), yoke, permanent magnet, release coil and retracting springs: utilize the permanent magnet magnetic force that overcomes retracting spring that plunger is attracted to remain in fixed iron core or U font yoke at ordinary times.When triping operation; Polarity through permanent magnet magnetic force is weakened is connected (trip) electric current of triping to release coil; During less than the application of force of retracting spring, plunger is left U font yoke and is carried out the action of triping of circuit breaker under the effect of the power of retracting spring in attraction.
As above-mentioned, the release electromagnet device that is used for circuit breaker is the critical component that is used for carrying to this circuit breaker the instruction of triping, but in release electromagnet device in the past; Known for example have a release electromagnet device such shown in patent documentation 1; This release electromagnet device does not have fixed iron core, configuration as follows, promptly; Plunger connects release coil and/or annular permanent magnnet, and directly is adsorbed in U font yoke or the pole shoe (pole piece) that is configured in end winding.
Yet in this device, the plunger size is long, and its volume is big, therefore need drive with electromagnetic force corresponding with it, becomes the reason that efficiency of movement is reduced.In addition, the adsorption plane of plunger and U font yoke or pole shoe is positioned at the position away from the highest release coil central portion of the magnetic flux density that is produced to the release coil energising, therefore correspondingly needs big release current, causes efficiency of movement poor.
In addition; In the device of patent documentation 1; Plunger is slided in the bobbin (bobbin) that the moulding resin that is had boundary by machining accuracy forms; Therefore there is following problem in plunger because of the run-off the straights such as gap in the bobbin: be accompanied by the force of sliding friction and the magnetic adsorptive power that produce between the plunger that contact with end yoke through hole and cause and the end yoke, cause the operating characteristics reduction.
When the end yoke contacted, the space short circuit between plunger and the end yoke produced magnetic adsorptive power thus between plunger and end yoke in plunger, and under this state, above-mentioned force of sliding friction is the most remarkable.Result according to numerical analysis; Usually for the plunger weight about 1～2g, generation is equivalent to the magnetic adsorptive power of 100g, is N if establish the resistance that produces between end yoke and the plunger; If the coefficient of friction of end yoke is μ, then become the relation of frictional force F=μ N.Thus, the force of sliding friction during with common Metal Contact is in a ratio of bigger value, becomes the obvious main reasons for decrease of efficiency of movement.
On the other hand, as mobile solenoid (solenoid) the formula electromagnet of the spool that for example makes hydraulic valve (spool), known have a solenoid type electromagnet shown in the patent documentation 2.In this solenoid type electromagnet, around fixed iron core and movable core, be provided with the pipe that the nonmagnetic material by tubular forms, movable core is slided in this pipe.In the device of the type; Because movable core (plunger) is slided in metal pipe; Therefore force of sliding friction reduces; Have in use under the situation of bobbin of same hollow diameter, owing to insertion tube has to there is the problem that magnetic resistance correspondingly increases, efficiency of movement reduces in the amount of the thickness of this pipe of reduced of fixed iron core, movable core.
In addition; In the device of patent documentation 2; The adsorption plane of fixed iron core and movable core is positioned at the substantial middle portion of coil; The device of patent documentation 2 is not to utilize the permanent magnet magnetic force that overcomes retracting spring at ordinary times plunger being attracted to remain in the release electromagnet of fixed iron core, but does not have the open electromagnet of permanent magnet.That is, the device of patent documentation 2 is that fixed iron core and movable core are open state, the type of utilizing the application of force of coil that both are attached together at ordinary times, so coil current becomes big, and efficiency of movement worsens, and use is limited.
Patent documentation 1: TOHKEMY 2005-166429 communique (Fig. 1)
Patent documentation 2: japanese kokai publication hei 11-67531 communique (Fig. 3)
In such release electromagnet device; Only utilize the confining force of permanent magnet that plunger is adsorbed in fixed iron core; When triping operation, utilize the polarity that permanent magnet magnetic force is weakened that release coil is connected tripping current, therefore can realize the action of triping of the circuit breaker that efficiency of movement is high.But, need set the absorption affinity of usual state with the mode that can not carry out malfunction with respect to the vibratory impulse that falls etc. simply.That is,, need make absorption affinity with respect to the retracting spring power of the direction of triping and on the basis of plunger absorption affinity, guarantee extra load margin (margin) in order also can not keep adsorbed state with discharging with respect to bigger impact.This load margin depends on the required value that is obtained by product specification (for example freedom from vibration is that 50～100G does not carry out malfunction etc. yet) of power of 50～100 times that needs the plunger own wt etc. or reliable in action property.Therefore, the releasing action current value depends on this load margin largely, certainly, for example alleviates the plunger own wt as far as possible and helps to reduce load margin, improves efficiency of movement.
In addition, in order to echo device miniaturization trend in recent years, the requirement small-sized, high efficiency of release electromagnet device also improves, need make reducing of magnetic resistance.Therefore; Dwindling of space part as the major part of magnetic resistance is necessary, through dwindling the space between end yoke and the plunger as far as possible, can reduce magnetic resistance and improve efficiency of movement; But meanwhile; Under the situation of having dwindled the space, the making error during because of assembling makes between plunger and the end yoke to be close to a part of position, has the problem that frictional force increases, efficiency of movement reduces that is caused by magnetic adsorptive power.
Summary of the invention
The present invention makes in view of the above-mentioned technical task of device in the past; Its purpose is to obtain a kind of release electromagnet device of circuit breaker; This release electromagnet device makes the plunger diameter not realize short and smallization, the lightweight of plunger with dwindling, and the reducing of the force of sliding friction through not being accompanied by the plunger that magnetic resistance increases, and reduces load margin; Efficiency of movement is high, and release characteristics is stable.
Release electromagnet device of the present invention comprises: bobbin, and this bobbin is wound with release coil; The interior perimembranous of above-mentioned bobbin and configuration are relative to one another inserted in fixed iron core and plunger, this fixed iron core and plunger; U font yoke, it takes in above-mentioned bobbin, fixed iron core, plunger; The end yoke, it can be fixed on the peristome of above-mentioned U font yoke to the outstanding mode in outside with the upper end of above-mentioned plunger; Permanent magnet; It is installed on the bottom of above-mentioned U font yoke; This release electromagnet device utilizes above-mentioned permanent magnet to overcome to be located at the retracting spring of above-mentioned end yoke that plunger is remained on to attract the position at ordinary times; Through connecting release current to above-mentioned release coil; Give the releasing action that demagnetizing field carries out above-mentioned plunger to above-mentioned permanent magnet, this release electromagnet device is characterised in that, above-mentioned plunger by the large-diameter portion that relatively disposes with the said fixing iron core with link to each other with this large-diameter portion and an end constitutes to the side-prominent minor diameter part in outside; The adsorption plane of above-mentioned plunger and fixed iron core is positioned at the central portion of above-mentioned release coil in fact; Between the large-diameter portion of the internal perisporium of above-mentioned bobbin and plunger, be inserted with the pipe of the tubular that constitutes by nonmagnetic substance, this tube grip is between the opposing end surface of above-mentioned end yoke and fixed iron core.
According to the present invention, can access and a kind ofly come further to improve efficiency of movement and the stable release electromagnet device of release characteristics with comparing in the past with simpler structure.
Description of drawings
Fig. 1 is the structure cutaway view of the release electromagnet device of execution mode 1 of the present invention.
Fig. 2 is the structure cutaway view of the release electromagnet device of execution mode 2 of the present invention.
Fig. 3 is the amplification view of the end yoke part of execution mode 3 of the present invention.
Fig. 4 is the generation flux distribution of the release electromagnet device of execution mode 1 of the present invention.
Embodiment
Below, with reference to accompanying drawing execution mode of the present invention is described at length.
Fig. 1 is the cutaway view of the release electromagnet device of expression execution mode 1 of the present invention.
Among the figure, in release electromagnet device 1, release coil 3 is wound in the bobbin 2 of hollow form, and is accommodated in U font yoke 4.End yoke 5 is combined in the peristome of U font yoke 4, and methods such as utilization riveted joint are fixed in U font yoke 4.Dispose in the bottom of U font yoke 4 and to attract to keep the permanent magnet 7 that has been magnetized at thickness direction of plunger 6, the fixed head 8 that carries out the location of permanent magnet 7.
On permanent magnet 7, be provided with transmission yoke (transfer yoke) 9, on transmission yoke 9, carry and be equipped with fixed iron core 11 with the state that inserts bobbin 2.
Thereby transmission yoke 9 is to make the part of the magnetic flux that flows via plunger 6, end yoke 5, U font yoke 4, permanent magnet 7, fixed iron core 11 from release coil 3 walk around the device of permanent magnet 7 its absorption affinities of inching, is known device.
The plunger 6 that constitutes with the mode that can above end yoke 5, give prominence to is by constituting like the lower part: link to each other with the large-diameter portion 6a of said fixing unshakable in one's determination 11 configuration relatively, with this large-diameter portion 6a and to the side-prominent minor diameter part 6b in outside.On end yoke 5, be provided with lip portions 5b, this lip portions 5b has the through hole 5a that is used to insert plunger 6.Plate 13 ring that is fixed 14 is fixed in the outboard end of plunger 6, and this plate 13 remains on projected direction (A direction) and goes up the retracting spring 10 to plunger 6 application of forces, between the platform shape 6a of portion of this plate 13 and plunger, is equipped with leaf spring 15.
In addition, the pipe 12 of the tubular that is made up of nonmagnetic substance inserts between the large-diameter portion 6a of hollow wall and plunger 6 of bobbins 2, and is clamped between the opposite face of end yoke 5 and fixed iron core 11.That is, become fixed iron core 11 to be held fixing structure to the state of the direction pushing of transmission yoke 9 by pipe 12.
Next, the action of the release electromagnet device of the present invention that as above, constitutes is described.
At first, when the reset operation through circuit breaker (not shown) inserted illustrated reset position (direction opposite with arrow A) with plunger 6, this plunger 6 was attracted under the effect of the magnetic force Fm of permanent magnet 7 and remains in this position.Under this state, the magnetic flux of permanent magnet 7
turns back to the S utmost point (path X) from the N utmost point via transmission yoke 9, fixed iron core 11, plunger 6, end yoke 5, U font yoke 4.If establishing the spring force of retracting spring 10 is Fs, then plunger 6 is adsorbed with the power of Fm-Fs.
Under this state; For example in circuit breaker, flow leakage current is arranged; When through consequent trip signal release coil 3 being connected release current, then magnetic flux
is so that the mode that the confining force Fm of permanent magnet 7 eliminates flows in the path of fixed iron core 11, transmission yoke 9, U font yoke 4, end yoke 5, plunger 6 (path Y).Thus, the confining force Fm of permanent magnet 7 diminishes, and the spring force Fs of retracting spring 10 overcomes the confining force Fm of permanent magnet 7, and therefore, plunger 6 is outstanding to outer side (arrow A direction).
If plunger 6 is outstanding, then carry out the action of triping of not shown circuit breaker.Make actuator (actuator) (not shown) that main body mechanism portion leaves to the direction push plate 13 opposite, make plunger 6 be adsorbed in fixed iron core 11, thus, as initial illustrated, make release electromagnet device 1 carry out homing action with A.Plate 13 can utilize the central axis direction action of leaf spring 15 in plunger 6, therefore can prevent when carrying out the homing action of actuator owing to the excessive push plate 13 of actuator is destroyed plate 13.
In the release electromagnet device of above-mentioned execution mode 1, clip pipe 12 by fixed iron core 11 and end yoke 5, thereby can make short and smallization of plunger length, magnetic resistance can not take place carry out releasing action with increasing.Simultaneously; Plunger always is configured in the high metallic pipe of machining accuracy; Slide with the low state of force of sliding friction, therefore can reduce gap and foozle, the space in the time of can being suppressed at releasing action between the rocking of fixed iron core 11, plunger and the end yoke inhomogeneous.
The general tolerance of JIS specification is defined in the member below the 6mm and is ± 0.1mm.Therefore, as long as the space between end yoke and the plunger is set in the above value of the tolerance of plunger and the pipe rigging error during for ± 0.1mm (value of being stipulated by cumulative limit etc.).
Through such setting; Can also suppress owing to the absorption posture of rocking the plunger that takes place tilts and the inhomogeneous of caused absorption affinity and force of sliding friction that misplace to fixed iron core; And the frictional force that is caused by magnetic adsorptive power is increased owing to being close at a part of position between plunger and the end yoke; The reduction of consequent efficiency of movement can be suppressed, stable releasing action characteristic can be guaranteed.
In addition, as above-mentioned, in order also to keep adsorbed state with respect to big impact with not discharging; Need make the retracting spring power Fs of absorption affinity Fm greater than the direction of triping, in order to prevent and the corresponding malfunction of above-mentioned vibratory impulse, need be in above-mentioned design of part, operating principle; Make short and smallization of plunger, lightweight; Make the lightweight of plunger own wt, cut down load margin thus, improve efficiency of movement.In addition; As shown in Figure 4; When making short and smallization of plunger; The bearing surface of plunger 6 and fixed iron core 11 is configured near the highest coil central portion of the density of the magnetic flux
that produces to coil electricity, also can helps the raising of efficiency of movement certainly.
Fig. 2 is the cutaway view of the release electromagnet device of expression execution mode 2 of the present invention.In the drawings, identical with Fig. 1 Reference numeral is represented with a part or suitable part.In Fig. 2, be with different portions among Fig. 1,
In Fig. 1, on permanent magnet 7, be provided with transmission yoke 9, on transmission yoke 9, carry and be equipped with fixed iron core 11, but in Fig. 2, the structure that fixed iron core 11 and transmission yoke 9 are integrated with the state that inserts bobbin 2.Thus, there is no need other the preparation and transmit yoke, and fixed iron core 11 is fixing reliable and easy.
Fig. 3 is the local amplification view of the release electromagnet device of expression execution mode 3 of the present invention.In the drawings, identical with Fig. 1 Reference numeral is represented with a part or suitable part.In Fig. 3; Be with different portions among Fig. 1; In Fig. 1, between the opposite face between non magnetic pipe 12 embedding end yokes 5 and the fixed iron core 11, but in Fig. 3; It is fixing with distance piece (spacer) 16 between end yoke 5 and bobbin 2, to be inserted with pipe, the non magnetic pipe 12 of clamping between this pipe is fixed with distance piece 16 and fixed iron core 11.Pipe is fixing to be made up of nonmagnetic substance with distance piece 16, the hole and bobbin 2 chimeric the fixing that on its part, form by that kind as shown in the figure.Thus, the moulding of end yoke 5 becomes easily, helps to reduce manufacturing cost.
Description of reference numerals
1 release electromagnet device, 2 bobbins,
3 release coils, 4 U font yokes,
5 end yokes, 5a end yoke through hole,
6 plunger portions, the large-diameter portion of 6a plunger,
The minor diameter part of 6b plunger, 7 permanent magnets,
8 fixed heads, 9 transmission yokes,
10 retracting springs, 11 fixed iron cores,
12 non magnetic pipes, 13 plates,
14 retainer rings, 15 leaf springs,
16 pipes are fixedly used distance piece.
Claims (6)
1. release electromagnet device has: bobbin, and this bobbin is wound with release coil; The interior perimembranous of above-mentioned bobbin and configuration are relative to one another inserted in fixed iron core and plunger, this fixed iron core and plunger; U font yoke, this U font yoke is taken in above-mentioned bobbin, fixed iron core, plunger; End yoke, this end yoke can be fixed on the peristome of above-mentioned U font yoke to the outstanding mode in outside with the upper end of above-mentioned plunger; Permanent magnet; This permanent magnet is installed on the bottom of above-mentioned U font yoke; The retracting spring that this release electromagnet device utilizes above-mentioned permanent magnet antagonism to be located at above-mentioned end yoke at ordinary times remains on plunger and attracts the position; Through connecting release current and give demagnetizing field to above-mentioned permanent magnet to above-mentioned release coil; Carry out the releasing action of above-mentioned plunger, it is characterized in that, above-mentioned plunger by with the large-diameter portion of said fixing configuration relatively unshakable in one's determination with link to each other with this large-diameter portion and an end constitutes to the side-prominent minor diameter part in outside; The adsorption plane of above-mentioned plunger and fixed iron core is positioned at the central portion of above-mentioned release coil in fact; Between the large-diameter portion of the internal perisporium of above-mentioned bobbin and plunger, be inserted with the pipe of the tubular that constitutes by nonmagnetic substance, this tube grip is between the opposing end surface of above-mentioned end yoke and fixed iron core.
2. release electromagnet device according to claim 1 is characterized in that,
The fixing distance piece of using of insertion tube between above-mentioned end yoke and bobbin, clamping aforementioned tube between this pipe is fixed with distance piece and fixed iron core.
3. release electromagnet device according to claim 1 and 2 is characterized in that,
The adsorption plane of fixed iron core and plunger is positioned at the central portion of release coil in fact.
4. release electromagnet device according to claim 3 is characterized in that,
Bottom at U font yoke is fixed with permanent magnet, and this permanent magnet attracts to keep to plunger and is magnetized along thickness direction, on above-mentioned permanent magnet, is provided with the transmission yoke, on the transmission yoke, carries with the state that inserts bobbin and is equipped with the said fixing iron core.
5. release electromagnet device according to claim 4 is characterized in that,
Fixed iron core is one-body molded with the transmission yoke.
6. release electromagnet device according to claim 1 is characterized in that,
Space between plunger and the end yoke is set at the above value of rigging error of the tolerance of plunger and pipe.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2009/066387 WO2011033654A1 (en) | 2009-09-18 | 2009-09-18 | Releasing type electromagnet device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102473561A true CN102473561A (en) | 2012-05-23 |
Family
ID=43758280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801601050A Pending CN102473561A (en) | 2009-09-18 | 2009-09-18 | Releasing type electromagnet device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5124048B2 (en) |
| CN (1) | CN102473561A (en) |
| DE (1) | DE112009005252T5 (en) |
| WO (1) | WO2011033654A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337424A (en) * | 2013-06-19 | 2013-10-02 | 邳州市国龙电器有限公司 | Permanent magnet tripping device |
| CN104347225A (en) * | 2013-08-05 | 2015-02-11 | 宝鸡烽火工模具技术有限公司 | Electromagnet capable of preventing permanent attraction and clamping stagnation |
| CN106971812A (en) * | 2017-04-12 | 2017-07-21 | 宁波兴茂电子科技有限公司 | A kind of super-silent electromagnet |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568741A (en) * | 2011-12-30 | 2012-07-11 | 成都威特电喷有限责任公司 | Quick electromagnet with armature ram |
| EP3128523B1 (en) * | 2014-04-03 | 2021-05-26 | Mitsubishi Electric Corporation | Release-type electromagnet device and production method therefor |
| JP7435899B2 (en) | 2021-03-24 | 2024-02-21 | 三菱電機株式会社 | electromagnetic actuator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01262604A (en) * | 1988-04-14 | 1989-10-19 | Matsushita Electric Ind Co Ltd | Electromagnetic actuator |
| JPH08185788A (en) * | 1994-12-27 | 1996-07-16 | Mitsubishi Electric Corp | Circuit breaker with under-voltage trip device |
| JP2005166429A (en) * | 2003-12-02 | 2005-06-23 | Fuji Electric Fa Components & Systems Co Ltd | Release type electromagnetic solenoid |
| CN101030507A (en) * | 2006-02-27 | 2007-09-05 | 富士电机机器制御株式会社 | Electromagnetic release |
| JP2007258150A (en) * | 2006-02-27 | 2007-10-04 | Fuji Electric Fa Components & Systems Co Ltd | Release type electromagnetic device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1167531A (en) | 1997-08-18 | 1999-03-09 | Sanmei Denki Kk | Solenoid |
-
2009
- 2009-09-18 WO PCT/JP2009/066387 patent/WO2011033654A1/en active Application Filing
- 2009-09-18 DE DE112009005252T patent/DE112009005252T5/en not_active Withdrawn
- 2009-09-18 JP JP2011531727A patent/JP5124048B2/en not_active Expired - Fee Related
- 2009-09-18 CN CN2009801601050A patent/CN102473561A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01262604A (en) * | 1988-04-14 | 1989-10-19 | Matsushita Electric Ind Co Ltd | Electromagnetic actuator |
| JPH08185788A (en) * | 1994-12-27 | 1996-07-16 | Mitsubishi Electric Corp | Circuit breaker with under-voltage trip device |
| JP2005166429A (en) * | 2003-12-02 | 2005-06-23 | Fuji Electric Fa Components & Systems Co Ltd | Release type electromagnetic solenoid |
| CN101030507A (en) * | 2006-02-27 | 2007-09-05 | 富士电机机器制御株式会社 | Electromagnetic release |
| JP2007258150A (en) * | 2006-02-27 | 2007-10-04 | Fuji Electric Fa Components & Systems Co Ltd | Release type electromagnetic device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337424A (en) * | 2013-06-19 | 2013-10-02 | 邳州市国龙电器有限公司 | Permanent magnet tripping device |
| CN103337424B (en) * | 2013-06-19 | 2016-01-20 | 邳州市国龙电器有限公司 | A kind of permanent magnet releaser |
| CN104347225A (en) * | 2013-08-05 | 2015-02-11 | 宝鸡烽火工模具技术有限公司 | Electromagnet capable of preventing permanent attraction and clamping stagnation |
| CN106971812A (en) * | 2017-04-12 | 2017-07-21 | 宁波兴茂电子科技有限公司 | A kind of super-silent electromagnet |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112009005252T5 (en) | 2013-01-03 |
| JP5124048B2 (en) | 2013-01-23 |
| WO2011033654A1 (en) | 2011-03-24 |
| JPWO2011033654A1 (en) | 2013-02-07 |
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Effective date of abandoning: 20120523 |
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