CN105448459A - Multi-permanent magnet high-speed two-way electromagnet - Google Patents
Multi-permanent magnet high-speed two-way electromagnet Download PDFInfo
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- CN105448459A CN105448459A CN201510907869.9A CN201510907869A CN105448459A CN 105448459 A CN105448459 A CN 105448459A CN 201510907869 A CN201510907869 A CN 201510907869A CN 105448459 A CN105448459 A CN 105448459A
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Abstract
The invention provides a multi-permanent magnet high-speed two-way electromagnet. Each permanent magnet high-speed electromagnet comprises an iron core, a coil, an outer shell, an annular small permanent magnet and a large permanent magnet, wherein each iron core comprises a cylindrical primary magnetic pole and a circular secondary magnetic pole; each coil is arranged in a coil mounting groove; each outer shell sleeves the outside of each iron core; an annular flange extends out of the bottom of each primary magnetic pole or each secondary magnetic pole; the small permanent magnet is inlaid between each annular flange and each primary magnetic pole or each secondary magnetic pole; each small permanent magnet is in radial radiation magnetization; two permanent magnet high-speed electromagnets are symmetrically arranged; an armature and a valve rod are shared by the two permanent magnet high-speed electromagnets; a through hole is formed in the middle of each primary magnetic pole; the valve rod is arranged in each through hole in a penetrating manner; the armature is fixed on the valve rod; each large permanent magnet is a cylindrical ring which is concentric with each iron core and is inlaid between two pairs of magnetic poles arranged up and down; and each large permanent magnet is in radial radiation magnetization. The multi-permanent magnet high-speed two-way electromagnet is fast in response, high in stability, low in leakage flux and applicable to an electronic-controlled fuel system of a diesel engine, and can be in two-way motion.
Description
Technical field
What the present invention relates to is a kind of electromagnet, especially a kind of diesel electric-controlled fuel system high-speed electro-magnet.
Background technology
Electric control fuel oil jet system is the developing direction of modern diesel engine fuel system.The electromagnet that response speed can reach Millisecond can be described as high-speed electro-magnet.Present stage, no matter be time controlled system, or the high pressure co-rail system that pressure versus time controls, high-speed electro-magnet is all the important spare part ensureing that electric control fuel system normally works, and its forceful electric power magnetic force and fast response characteristic directly affect the accurate control of injection timing and distributive value.For meeting the Abgasgesetz of increasingly stringent, improving fuel economy, reducing hazardous emission, the performance of electromagnet is had higher requirement.
Conventional E type work of electromagnet frequency is higher, and due to by remagnetization, cause eddy current loss to increase, quantity of heat production increases, and affects the magnetic property of magnetic material, reduces the Stability and dependability of work of electromagnet.And leakage field phenomenon easily appears in conventional electromagnetic iron, electromagnet performance is had a negative impact.For strengthening the heat radiation of electromagnet, reducing leakage field, improving the Stability and dependability of electromagnet, under the prerequisite meeting electromagnetic force requirement, rationally will improve electromagnet structure, for raising electromagnet performance, there is important impact.
Summary of the invention
The object of the present invention is to provide a kind of respond fast, can bidirectional-movement, the high and low leakage field of stability many permanent magnetism high-speed bidirectional electromagnet.
The object of the present invention is achieved like this: comprise two permanent magnetism high-speed electro-magnets, each permanent magnetism high-speed electro-magnet comprises iron core, coil and shell body, iron core is made up of cylindrical main pole and annular secondary magnetic pole, coil mounting groove is set between main pole and secondary magnetic pole, coil is arranged in coil mounting groove, shell body is enclosed within outside iron core, annular flange flange is extended bottom main pole or secondary magnetic pole, also comprise annular little permanent magnet, it is middle that little permanent magnet is embedded in described annular flange flange and main pole or secondary magnetic pole, the magnetizing direction of little permanent magnet is that radial radiation magnetizes, two permanent magnetism high-speed electro-magnets are arranged symmetrically with and little permanent magnet end is relative, two permanent magnetism high-speed electro-magnets share an armature and a valve rod, the centre of main pole is with through hole, valve rod is through in described through hole, armature is fixed on valve rod, also comprise large permanent magnet, large permanent magnet is the cylinder ring concentric with iron core, be embedded between upper and lower two secondary magnetic poles, the magnetizing direction of large permanent magnet is that radial radiation magnetizes, radially inwardly.
Many permanent magnetism high-speed bidirectional electromagnet of the present invention can also comprise:
1, the through hole in the middle of main pole is shoulder hole, arranges the back-moving spring be enclosed within valve rod in shoulder hole.
2, described little permanent magnet is continuous print annular.
3, described little permanent magnet is the annular be made up of several sections of circular arcs of decile.
4, several sections of circular arc compact arrangement of described decile.
Gap is had between several sections of circular arcs of 5, described decile.
6, the interface of annular flange flange and little permanent magnet is the face of cylinder.
7, the interface of annular flange flange and little permanent magnet is taper seat.
8, large permanent magnet is three sections of circular arc compositions of decile, has gap between three sections of circular arcs.
9, also cooling package is comprised, described cooling package comprises damping displacement adjustable ring, guiding valve, valve pocket, the cylindrical structure of through hole is had centered by guiding valve, slide valve buckle is on valve rod, guiding valve is provided with some damping through holes and is distributed on circumferentially same, the guiding valve spring that is reset is pressed on damping displacement adjustable ring in advance, has the boss structure of cylindrical hole centered by damping displacement adjustable ring.
Many permanent magnetism high-speed bidirectional electromagnet of the present invention is upper and lower symmetrical structure, and its composition comprises shell body, iron core, coil, armature, coil rack, sealing resin, embedded valve pocket, back-moving spring and valve rod.Have through hole centered by shell body, also have the cylinder of through hole with armature correspondence position, two ends arrange hold-down nut.Iron core is made up of iron core major-minor magnetic pole and little permanent magnet, and flange is positioned at nearly coil sides bottom main pole or secondary magnetic pole.Little permanent magnet is the cylinder ring concentric with iron core, is embedded in the middle of main pole and secondary magnetic pole flange, and its magnetizing direction is that radial radiation magnetizes, consistent with the magnetic circuit direction of the generation of coil.Large permanent magnet is the cylinder ring concentric with iron core, and be embedded in inner side between upper and lower two secondary magnetic poles, the magnetizing direction of its permanent magnet is that radial radiation magnetizes, radially inwardly.
Many permanent magnetism high-speed bidirectional electromagnet of the present invention have employed two " day " the font iron core symmetrical structure of permanent magnetism, cylinder or " T " font cylinder of ladder hole is had centered by main pole, secondary magnetic pole is the cylinder that centre has ladder hole, two concentric grooves are had bottom secondary magnetic pole, large permanent magnet diameter is more bigger than the maximum groove diameter of secondary magnetic pole, its height is equal with armature thickness, leaves gap between upper and lower two secondary magnetic poles.Secondary magnetic pole cylinder diameter is equal with main pole ladder center-hole diameter, and the nearly coil sides of main pole and secondary magnetic pole lower end extends flange, and flange is complete cylinder ring or circular cone structure.Valve rod and armature are fixed by snap ring, through the embedded valve pocket in the middle of main pole.Little permanent magnet is embedded between flange and magnetic pole, adopts interference fit.Its upper surface is concordant with lug upper surface, and little permanent magnet lower surface is concordant or lower slightly with major-minor magnetic pole lower surface.Little permanent magnet is the circular arc permanent magnet of complete magnet ring or decile, the circular arc permanent magnet close arrangement of decile or the distribution of decile uniform intervals.Large permanent magnet is the circular arc permanent magnet of the decile of uniform intervals distribution, between upper and lower two secondary magnetic poles.Main pole top and nut center have threaded hole, and both are connected by screw.
Many permanent magnetism type in even-numbered days high-speed bidirectional electromagnet of the present invention, have employed permanent magnetism " day " font structure, armature is placed in centre position by two back-moving springs, and upper coil is energized, lower coil power-off, and armature moves upward; Otherwise, move downward, control the bidirectional-movement of armature according to this.The magnetic field produced after coil electricity and little permanent magnet produce magnetic field superposition, and little permanent magnet shields the leakage field between major-minor magnetic pole on the one hand, provides the magnetic flux by armature on the other hand, increases electromagnetic force; Armature is in attracting process, and large permanent magnet shields the leakage field between armature and housing.The flange of secondary magnetic pole increases the adhesive area of iron core and armature, makes through flange, the overall Magnetic Induction Density Distribution of armature also to be made simultaneously more even, not easily occur the phenomenon of local Premature saturation by a magnetic induction line part for armature.
Accompanying drawing explanation
Fig. 1 is many permanent magnetism high-speed bidirectional electromagnet schematic diagram of the present invention.
Fig. 2 (a) is main pole profile; Fig. 3 (b) is secondary magnetic pole profile.
3 kinds of different structure schematic diagrames that Fig. 3 (a)-Fig. 3 (c) is medium and small permanent magnet, the little permanent magnet of Fig. 3 (a) is complete magnet ring; Fig. 3 (b) is the circular arc permanent magnet of little permanent magnet decile and is close arrangement; The little permanent magnet of Fig. 3 (c) is the circular arc permanent magnet of decile and is the distribution of decile uniform intervals.
Fig. 4 is that in Fig. 1, large permanent magnet is the circular arc permanent magnet schematic diagram of decile uniform intervals distribution.
Four kinds of combining forms that Fig. 5 (a)-5 (c) is iron core major-minor magnetic pole, Fig. 5 (a) for main pole be that centre has ladder hole " T " font cylinder, secondary magnetic pole is the cylinder that centre has ladder hole, flange is at secondary magnetic pole near coil sides, and Fig. 5 (b) extends main pole lateral length on the basis of Fig. 5 (a); Fig. 5 (c) for main pole be the cylinder that centre has through hole, main pole is that reeded cylinder is opened at center, lower surface, flange in main pole near coil sides.
The combining form that Fig. 6 (a)-Fig. 6 (b) is flange and little permanent magnet, Fig. 6 (a) for flange and little permanent magnet be pylon, Fig. 6 (b) for flange and little permanent magnet be frustum.
Fig. 7 (a)-Fig. 7 (b) can cooled core structure schematic diagram for what have through hole in the middle of iron core, and Fig. 7 (b) is vibration damping cooling package I close-up schematic view in Fig. 7 (a).
Fig. 8 (a)-8 (b) is under electromagnet coil no power and "on" position, magnetic circuit circulation schematic diagram, Fig. 8 (a) is electromagnet magnetic circuit schematic diagram when coil is not energized, and Fig. 8 (b) is electromagnet magnetic circuit schematic diagram during coil electricity.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail.
Composition graphs 1, Fig. 2, Fig. 3, the composition of the first execution mode of many permanent magnetism type in even-numbered days high-speed bidirectional electromagnet of the present invention comprise shell body 15, day shaped iron core 9, coil 2, armature 6, snap ring 10, coil rack 7, sealing resin 3, embedded valve pocket 14, back-moving spring 13 and valve rod 16.Have through hole centered by shell body 15, also have the cylinder of through hole 26 with large permanent magnet correspondence position, upper and lower side respectively arranges hold-down nut 1.Day, shaped iron core 9 was made up of main pole 17, secondary magnetic pole 19 and little permanent magnet 4, and have the cylindrical structure of ladder hole centered by main pole 17, its upper surface axially has threaded aperture; Have annular groove 18 bottom secondary magnetic pole 19, groove center has the cylindrical structure of ladder hole, and its centre bore radius R 2 is equal with main pole 17 radius R 1.Flange 11 is positioned at nearly coil sides bottom main pole 17, and between flange 11 and secondary magnetic pole 19, inlay one piece little permanent magnet 4, both adopt interference fit; Little permanent magnet can be the circular arc permanent magnet of complete magnet ring or decile, the circular arc permanent magnet close arrangement of decile or the distribution of decile uniform intervals, its lower surface is concordant or lower slightly with the lower surface of day shaped iron core 9, and its magnetizing direction is that radial radiation magnetizes, consistent with coil electricity magnetic circuit circulating direction.Fixed by snap ring 10 between valve rod 16 and armature 6, through the embedded valve pocket 14 in the middle of main pole.In the groove of large permanent magnet 5 between upper and lower two secondary magnetic poles, big groove equal diameters bottom its diameter and secondary magnetic pole, height is equal with armature thickness, and the magnetizing direction of large permanent magnet 5 is that radial radiation magnetizes, vertically inwardly.Many permanent magnetism day of the present invention, the valve rod 16 of type high-speed bidirectional electromagnet upper part was connected by snap ring 10 and armature 5, be arranged in successively from top to bottom in shell body 15 with back-moving spring 13, main pole 17, coil 2, secondary magnetic pole 19, little permanent magnet 4 embeds between flange and magnetic pole from bottom to top, large permanent magnet 5 embeds in secondary magnetic pole groove from bottom to top, lower part erection sequence is consistent with upper part, shell body 15 two ends arrange hold-down nut 1, and nut and main pole are fixed by screw 8.
Composition graphs 5 (a), the second execution mode of many permanent magnetism type in even-numbered days high-speed bidirectional electromagnet of the present invention is on the basis of the first execution mode, change the structure of major-minor magnetic pole, " T " font cylinder of ladder hole is had centered by main pole 17, its upper surface axially has axially threaded hole, is evenly arranged in around ladder hole; Have the cylinder of through hole centered by secondary magnetic pole 19, extend step groove bottom it, main pole 17 top column diameter is equal with secondary magnetic pole 19 through-hole diameter, and flange 11 is positioned at nearly coil sides bottom secondary magnetic pole 19.
Composition graphs Fig. 5 (b) simultaneously, the third execution mode of many permanent magnetism type in even-numbered days high-speed bidirectional electromagnet of the present invention is on the basis of the first execution mode, change secondary magnetic pole 19 big column diameter, make it equal main pole 17 diameter, reduce secondary magnetic pole 19 height.This structure eliminates the hold-down screw 8 on secondary magnetic pole, and structure becomes simpler, reduces installation difficulty, improves the reliability of work of electromagnet.
Composition graphs 5 (c) simultaneously, 4th kind of execution mode of many permanent magnetism type in even-numbered days high-speed bidirectional electromagnet of the present invention is on the basis of the third execution mode, change major-minor field structure, main pole 17 becomes the cylinder that center has ladder hole, and upper surface has axially threaded hole.Open reeded cylindrical structure centered by secondary magnetic pole 19, flange 11 is positioned at nearly coil sides bottom secondary magnetic pole, and major-minor magnetic pole is fixed by screw.
Composition graphs 5 (c), Fig. 6 (a), Fig. 6 (b) simultaneously, the 5th kind of execution mode of the two king's type high-speed bidirectional electromagnet of many permanent magnetic radials multi-coil of the present invention is the fit form changing flange 11 and little permanent magnet 4.As shown in Fig. 5 (c), flange 11 and the fit form of little permanent magnet 4 are that cylinder ring coordinates and flange width L1 is equal or bigger with permanent magnet width L2.As shown in Fig. 6 (a), 6 (b), flange 11 and the fit form of permanent magnet 4 are that circular cone ring coordinates and the bottom width L1 of flange is greater than permanent magnet bottom width L2.
Simultaneously composition graphs 7 (a)-7 (b), 6th kind of execution mode of many permanent magnetism type in even-numbered days high-speed bidirectional electromagnet of the present invention is on the basis of above five kinds of execution modes, the heart sets up vibration damping cooling package II in the core which, comprise damping displacement adjustable ring 21, back-moving spring 13, guiding valve 25, valve pocket 22, damping displacement adjustable ring 21 and guiding valve 25 are provided with some damping through holes 20 and are distributed on circumferentially same, guiding valve 25 spring 13 that is reset is pressed on damping displacement adjustable ring 21 in advance, cylindrical hole is had centered by damping displacement adjustable ring 21, the boss structure of axially extending bore is had around cylindrical hole.Guiding valve 25 is enclosed within valve rod, and its center-hole diameter is more bigger than valve rod, can move up and down.Valve pocket 22 is fixed on valve rod, leaves gap between guiding valve and valve pocket, and valve pocket 22, in uphill process, contacts with guiding valve 25, and promotes guiding valve and press spring, until armature stop motion.In armature 6 attracting process, this vibration damping cooling package avoids the fierce adhesive of armature on the one hand, fuel oil is squeezed from central through hole and flows through on the other hand, take away coil 2 and day shaped iron core 9 heat, ensure that the magnetic property that core material is good, extruded fuel oil is discharged from central through hole simultaneously, reduces armature surface hydraulic coupling, reduce armature 6 to move suffered damping force, improve electromagnet dynamic responding speed.
Simultaneously Fig. 8 (a), 8 (b) show the operation principle of many permanent magnetism type in even-numbered days high-speed bidirectional electromagnet, as shown in Fig. 8 (a), when top and the bottom coil 2 all no power time, armature 6 is placed in centre position by back-moving spring 13, because day shaped iron core iron core magnetic resistance relative to the working gas gap existed between armature is comparatively large, little permanent magnet 4 produces the magnetic flux Φ arriving little permanent magnet 4 again through iron core secondary magnetic pole 19, main pole 17 and close
4, wherein sub-fraction arrives the closed magnetic flux Φ of little permanent magnet 4 again by interior working gas gap 24, armature 6, outer working gas gap 23
3; As shown in Fig. 8 (b), when upper coil energising, during lower coil power-off, it produces the magnetic flux Φ arriving secondary magnetic pole 19 again through secondary magnetic pole 19, main pole 17, interior working gas gap 24, armature 6, outer working gas gap 23 and close
1; The magnetic induction line direction produced due to now little permanent magnet 4 is reverse with iron core 9 magnetic induction direction, and now little permanent magnet 4 produces the magnetic flux Φ that major part returns little permanent magnet 4 through main pole 17, interior working gas gap 24, armature 6, outer working gas gap 23, secondary magnetic pole 19 and closes
2; Large permanent magnet effectively shields the leakage field between armature and housing; The magnetic field produced after coil electricity and little permanent magnet produce magnetic field superposition, and little permanent magnet shields the leakage field between major-minor magnetic pole on the one hand, provides the magnetic flux by armature on the other hand, increases electromagnetic force; Armature is in attracting process, and large permanent magnet shields the leakage field between armature and housing.The flange of secondary magnetic pole increases the adhesive area of iron core and armature, makes through flange, the overall Magnetic Induction Density Distribution of armature also to be made simultaneously more even, not easily occur the phenomenon of local Premature saturation by a magnetic induction line part for armature.Along with the increase of drive current, when suction is greater than resistance suffered by armature 6, armature starts to the motion of day shaped iron core direction, until arrive maximum displacement place.The magnetic flux that large permanent magnet 5 produces is constant.When armature reaches maximum displacement, coil can power-off, relies on the magnetic force of size permanent magnet can holding armature attracting state, eliminates maintenance electric current, reduces energy ezpenditure, reduce eddy current loss and the caloric value of coil.In armature 6 attracting process, reduce gradually with large permanent magnet 5 adhesive area, the magnetic attraction that suffered large permanent magnet provides also reduces gradually, makes armature attracting process soft, avoids the fluctuation clashing and produce.In addition, because electromagnet works in fuel oil environment always, fuel oil between armature 6 and day shaped iron core 9 is squeezed, armature 6 has damping hole 25, extruded fuel oil can be discharged from damping hole 25 and through hole 26, reduce armature surface hydraulic coupling, reduce damping force suffered by armature motion, improve electromagnet dynamic responding speed.When upper coil power-off, during lower coil energising, armature 6 is subject to downward electromagnetic attraction, makes armature sharp downward movement, and this structure, when drive current is constant, not only increases electromagnetic force, and accelerates the response speed of electromagnet.
What more than enumerate is only some embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.
Claims (9)
1. the electromagnet of permanent magnetism high-speed bidirectional more than a kind, it is characterized in that: comprise two permanent magnetism high-speed electro-magnets, each permanent magnetism high-speed electro-magnet comprises iron core, coil and shell body, iron core is made up of cylindrical main pole and annular secondary magnetic pole, coil mounting groove is set between main pole and secondary magnetic pole, coil is arranged in coil mounting groove, shell body is enclosed within outside iron core, annular flange flange is extended bottom main pole or secondary magnetic pole, also comprise annular little permanent magnet, it is middle that little permanent magnet is embedded in described annular flange flange and main pole or secondary magnetic pole, the magnetizing direction of little permanent magnet is that radial radiation magnetizes, two permanent magnetism high-speed electro-magnets are arranged symmetrically with and little permanent magnet end is relative, two permanent magnetism high-speed electro-magnets share an armature and a valve rod, the centre of main pole is with through hole, valve rod is through in described through hole, armature is fixed on valve rod, also comprise large permanent magnet, large permanent magnet is the cylinder ring concentric with iron core, be embedded between upper and lower two secondary magnetic poles, the magnetizing direction of large permanent magnet is that radial radiation magnetizes, radially inwardly.
2. many permanent magnetism high-speed bidirectional electromagnet according to claim 1, is characterized in that: large permanent magnet is three sections of circular arc compositions of decile, has gap between three sections of circular arcs.
3. many permanent magnetism high-speed bidirectional electromagnet according to claim 2, is characterized in that: the through hole in the middle of main pole is shoulder hole, arranges the back-moving spring be enclosed within valve rod in shoulder hole.
4. many permanent magnetism high-speed bidirectional electromagnet according to claim 3, it is characterized in that: also comprise cooling package, described cooling package comprises damping displacement adjustable ring, guiding valve, valve pocket, the cylindrical structure of through hole is had centered by guiding valve, slide valve buckle is on valve rod, guiding valve is provided with some damping through holes and is distributed on circumferentially same, and the guiding valve spring that is reset is pressed on damping displacement adjustable ring in advance, has the boss structure of cylindrical hole centered by damping displacement adjustable ring.
5., according to the many permanent magnetism high-speed bidirectional electromagnet of Claims 1-4 described in any one, it is characterized in that: described little permanent magnet is continuous print annular.
6., according to the many permanent magnetism high-speed bidirectional electromagnet of Claims 1-4 described in any one, it is characterized in that: described little permanent magnet is the annular be made up of several sections of circular arcs of decile, has gap between several sections of circular arc compact arrangement of described decile or several sections of circular arcs.
7., according to the many permanent magnetism high-speed bidirectional electromagnet of Claims 1-4 described in any one, it is characterized in that: the interface of annular flange flange and little permanent magnet is the face of cylinder or taper seat.
8. many permanent magnetism high-speed bidirectional electromagnet according to claim 5, is characterized in that: the interface of annular flange flange and little permanent magnet is the face of cylinder or taper seat.
9. many permanent magnetism high-speed bidirectional electromagnet according to claim 6, is characterized in that: the interface of annular flange flange and little permanent magnet is the face of cylinder or taper seat.
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| CN201510907869.9A CN105448459B (en) | 2015-12-10 | 2015-12-10 | Multi-permanent magnet high-speed two-way electromagnet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935355A (en) * | 2017-04-06 | 2017-07-07 | 许昌学院 | A kind of NEW TYPE OF COMPOSITE proportion electro-magnet |
| CN106960714A (en) * | 2017-04-06 | 2017-07-18 | 许昌学院 | A kind of compositely proportional electromagnet |
| CN108494213A (en) * | 2018-05-18 | 2018-09-04 | 河南理工大学 | A kind of linear actuator and application method of electromagnetic-permanent magnetic immixture |
| CN112257239A (en) * | 2020-10-14 | 2021-01-22 | 哈尔滨工程大学 | High-speed electromagnetic actuator dynamic performance calculation method considering eddy current effect |
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| CN101571206A (en) * | 2009-06-15 | 2009-11-04 | 哈尔滨工程大学 | Dual-coil electromagnetic valve |
| CN101737552A (en) * | 2008-11-17 | 2010-06-16 | Ckd株式会社 | Fluid control valve |
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| JPH07317626A (en) * | 1994-05-20 | 1995-12-05 | Caterpillar Inc | Hard magnetic valve actuator of fuel injector |
| CN2731675Y (en) * | 2004-09-07 | 2005-10-05 | 籍鹏杰 | Permanent magnet actuating gear of low voltage switch |
| CN2909503Y (en) * | 2006-06-28 | 2007-06-06 | 吕强 | Permanent magnet holding mechanism driven by electromagnetic |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935355A (en) * | 2017-04-06 | 2017-07-07 | 许昌学院 | A kind of NEW TYPE OF COMPOSITE proportion electro-magnet |
| CN106960714A (en) * | 2017-04-06 | 2017-07-18 | 许昌学院 | A kind of compositely proportional electromagnet |
| CN106935355B (en) * | 2017-04-06 | 2018-10-26 | 许昌学院 | A kind of NEW TYPE OF COMPOSITE proportion electro-magnet |
| CN106960714B (en) * | 2017-04-06 | 2018-10-26 | 许昌学院 | A kind of compositely proportional electromagnet |
| CN108494213A (en) * | 2018-05-18 | 2018-09-04 | 河南理工大学 | A kind of linear actuator and application method of electromagnetic-permanent magnetic immixture |
| CN108494213B (en) * | 2018-05-18 | 2023-06-13 | 河南理工大学 | Linear actuator with electromagnetic-permanent magnetic mixed action and use method thereof |
| CN112257239A (en) * | 2020-10-14 | 2021-01-22 | 哈尔滨工程大学 | High-speed electromagnetic actuator dynamic performance calculation method considering eddy current effect |
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Effective date of registration: 20220216 Address after: 214000 industrial resettlement area, Hongshan street, New District, Wuxi City, Jiangsu Province Patentee after: WUXI GDS MACHINERY MANUFACTURING Co.,Ltd. Address before: 150001 Intellectual Property Office, Harbin Engineering University science and technology office, 145 Nantong Avenue, Nangang District, Harbin, Heilongjiang Patentee before: HARBIN ENGINEERING University |
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