CN105448457A - Radial multi-coil combined high-speed bidirectional electromagnet - Google Patents

Radial multi-coil combined high-speed bidirectional electromagnet Download PDF

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Publication number
CN105448457A
CN105448457A CN201510907857.6A CN201510907857A CN105448457A CN 105448457 A CN105448457 A CN 105448457A CN 201510907857 A CN201510907857 A CN 201510907857A CN 105448457 A CN105448457 A CN 105448457A
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coil
magnetic pole
permanent magnet
radial multi
hole
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CN105448457B (en
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范立云
周伟
马修真
刘鹏
姚崇
袁志国
石勇
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Harbin Engineering University
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Harbin Engineering University
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Abstract

The invention provides a radial multi-coil combined high-speed bidirectional electromagnet. The high-speed bidirectional electromagnet comprises two electromagnets, an armature and a valve rod, wherein each electromagnet is a radial multi-coil high-speed electromagnet, an iron core comprises a main magnetic pole and an auxiliary magnetic pole, the main magnetic pole is a cylinder, the auxiliary magnetic pole is a cylinder provided with a through hole at the center, the main magnetic pole is arranged in the through hole of the auxiliary magnetic pole, an outer shell sleeves the main magnetic pole, a convex ring is arranged on the main magnetic pole or the auxiliary magnetic pole, fan-shaped or wrist-shaped through holes are uniformly formed in the convex ring in an axial direction, a coil inner core is formed between two adjacent fan-shaped through holes, a coil is radially wound around the coil inner core, a through hole is formed in the center of the main magnetic pole, the two radial multi-coil high-speed electromagnets are symmetrically arranged, the armature is arranged between the two radial multi-coil high-speed electromagnets, the valve rod passes through the through holes in the centers of the two main magnetic poles, and the armature is fixed with the valve rod. The radial multi-coil combined high-speed bidirectional electromagnet has the characteristics of fast response speed, small driving current and favorable cooling performance, can move in a bidirectional way, and is suitably used for an electronically-controlled fuel system of a diesel engine.

Description

Radial multi-coil combined high-speed bidirectional electromagnet
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
Along with the development of electronic Control for Diesel Engine technology, the Electronic Control of fuel injection system has become the important technology of the Abgasgesetz meeting increasingly stringent.No matter electrically-controlled pump nozzle, monoblock pump, dispensing pump, or development speed high pressure common rail electric-controlled injection system faster at present, high-speed electro-magnet is all the key components and parts ensureing that it normally works, as the interface of fuel system ECU (Electrical Control Unit) and fuel injection equipment (FIE), realize the accurate control to injection timing and distributive value by the closing moment and closing time length regulating armature, its application achieves fuel-injected Digital Control.
The electromagnet that response speed can reach Millisecond can be described as high-speed electro-magnet.High-speed electro-magnet is operated in the complication system of a current collection, magnetic, machine, liquid coupling, and its forceful electric power magnetic force and fast response characteristic directly determine the flexible fuel injection characteristic of electric control fuel oil jet system.Traditional E type electromagnet, lacks effective heat exchange measure, causes coil temperature rise larger, and then affect the magnetic property of magnetic material, makes the response speed of electromagnet slack-off.For reducing the working temperature of electromagnet, the drive current that general employing is little, this result in again the reduction of electromagnetic force.Therefore under the requirement meeting electromagnetic force, adopt less drive current to add the heat exchange of powerful electromagents while reducing energy consumption, realize its effective cooling, for the response characteristic improving electromagnet, improve fuel injection characteristic, realize diesel energy-saving reduction of discharging and have great importance.
Summary of the invention
The object of the present invention is to provide that a kind of fast response time, drive current are little, thermal diffusivity is good, can the radial multi-coil combined high-speed bidirectional electromagnet of bidirectional-movement.
The object of the present invention is achieved like this:
Comprise two electromagnet, armature and valve rods; Described electromagnet is radial multi-coil high-speed electro-magnet, comprise shell body, iron core and coil, described iron core is made up of main pole and secondary magnetic pole, main pole is cylinder, the cylinder of through hole is had centered by secondary magnetic pole, main pole is arranged in the through hole of secondary magnetic pole, shell body is enclosed within outside main pole, with bulge loop on main pole or secondary magnetic pole, described bulge loop axially has equally distributed fan-shaped or waist through hole, form coil inner core between adjacent two fan-shaped pylones, coil radial direction is wrapped on coil inner core, and the center of main pole has through hole; Two radial multi-coil high-speed electro-magnets share an armature and a valve rod, two radial multi-coil high-speed electro-magnet symmetries are installed, armature is between two radial multi-coil high-speed electro-magnets, and valve rod is through in the through hole at two main pole centers, and armature and valve rod are fixed.
The present invention can also comprise:
1, described radial multi-coil high-speed electro-magnet also comprises permanent magnet, permanent magnet is the cylinder ring concentric with iron core, flange is stretched out bottom main pole or secondary magnetic pole, permanent magnet is embedded between flange and another magnetic pole, the upper surface of permanent magnet is concordant with lug upper surface, lower surface is concordant with iron core lower surface or lower slightly, and the magnetizing direction of permanent magnet is that radial radiation magnetizes, two radial multi-coil high-speed electro-magnets have one end of permanent magnet relative.
2, described permanent magnet is the circular arc permanent magnet of decile and the distribution of decile uniform intervals, and permanent magnet and the fit form of flange are that cylinder ring coordinates and flange width is equal with permanent magnet width or bigger.
3, described permanent magnet is the circular arc permanent magnet of decile and the distribution of decile uniform intervals, permanent magnet and the fit form of flange be circular cone ring coordinate and the bottom width of flange to be greater than permanent magnet bottom surface wide.
4, described bulge loop and flange are arranged on the inwall of secondary magnetic pole.
5, described bulge loop is arranged on the outer wall of main pole, and described flange is arranged on the inwall of secondary magnetic pole.
6, the through hole of main pole is shoulder hole, fluid power vibration damping cooling package is set in described shoulder hole, fluid power vibration damping cooling package comprises back-moving spring, guiding valve, damping displacement adjustable ring, guiding valve is provided with some damping holes and is distributed on circumferentially same, the boss structure of cylindrical hole is had centered by damping displacement adjustable ring, reserved one section of space between valve rod and guiding valve, guiding valve is positioned on damping displacement adjustable ring.
The invention provides a kind of fast response time, drive current be little, thermal diffusivity is good, can the two permanent magnet combination formula high-speed bidirectional electromagnet of radial multi-coil of bidirectional-movement.
The two permanent magnet combination formula high-speed bidirectional electromagnet of radial multi-coil of the present invention is upper and lower symmetrical structure, and its composition mainly comprises shell body, Combined iron core, coil, back-moving spring, coil rack, sealing resin, armature and valve rod.The cylindrical structure of through hole is had centered by shell body; Combined iron core cross section is " king " font, comprises upper and lower two parts, is made up of main pole, secondary magnetic pole and permanent magnet, is symmetrically distributed in armature both sides, and bottom main pole or secondary magnetic pole, nearly coil sides extends annular flange flange; Permanent magnet is and the iron core concentric circles band of column is embedded between flange and magnetic pole.The magnetizing direction of permanent magnet is that radial radiation magnetizes, consistent with the magnetic circuit circulating direction of the generation of coil.Armature, in main pole shoulder hole, is placed in centre position by valve stem spacing ring by back-moving spring.
The two permanent magnet combination formula high-speed bidirectional electromagnet casing body upper and lower side of described radial multi-coil arranges fixing big nut; Nut is that lower surface has annular groove, and groove center has the cylinder of through hole; Combined iron core main pole can be that centre has the cylinder of ladder hole, cross cylinder, " T " font cylinder or the boss structure that falls; Secondary magnetic pole is that centre has through hole, upper and lower both ends of the surface all have groove or only upper surface have the cylinder of annular groove.Main pole or secondary magnetic pole have axially extending bore, be evenly arranged in inside annular groove, between two axially extending bores, part forms coil inner core, and coil radial direction is wound on inner core, and coil surface scribbles resin or other insulation heat proof material formation inductance loop seclusion bodies come retarder and cooling fluid.Flange is positioned at nearly coil sides bottom main pole or secondary magnetic pole.Permanent magnet is that decile uniform intervals arranges arc-shaped permanent magnet, and be embedded in the middle of magnetic pole and flange, its combination can be pylon or frustum form, adopts interference fit.Permanent magnet upper surface is concordant with lug upper surface, and lower surface is concordant or lower slightly with major-minor magnetic pole lower surface.
The two permanent magnet combination formula high-speed bidirectional electromagnet of radial multi-coil of the present invention is upper and lower symmetrical structure, adopt the structure of Combined iron core and radial coil on the one hand, between adjacent two coils, leave louvre, increase the area of dissipation of coil and iron core, strengthen heat exchange; The magnetic field produced after coil electricity on the other hand and permanent magnet produce magnetic field superposition, and 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; Flanged structure increases the adhesive area of iron core and armature, making can through flange by a magnetic induction line part for armature, add armature magnetic induction line number vertically, also make the overall Magnetic Induction Density Distribution of armature more even simultaneously, not easily occur the phenomenon of local Premature saturation.Compared with tradition " E " type electromagnet, traditional single multiturn coil is carried out dispersed placement by the two permanent magnet combination formula high-speed bidirectional electromagnet of radial multi-coil, reduce the inductance of coil, improve the rate of climb and the rate of decay of electric current in coil, accelerate the response speed of electromagnet.
Accompanying drawing explanation
Fig. 1 is the two permanent magnet combination formula high-speed bidirectional electromagnet overall structure schematic diagram of radial multi-coil of the present invention.
Fig. 2 is nut structure schematic diagram.
The structural representation that Fig. 3 (a) is secondary magnetic pole; The structural representation that Fig. 3 (b) is main pole.
Fig. 4 (a)-Fig. 4 (b) is for iron core having the structure of axially fan-shaped or waist through hole, Fig. 4 (a) has the fan-shaped or waist through hole form of three axis for iron core, and Fig. 4 (b) has the fan-shaped or waist through hole form of two axis for iron core.
Fig. 5 is permanent magnet is decile uniform intervals distribution arc-shaped magnet structure schematic diagram.
Fig. 6 (a)-6 (b) is iron core major-minor magnetic pole two kinds of versions, and Fig. 6 (a) has ladder hole in the middle of main pole, and secondary magnetic pole two ends have groove, and groove center has through hole, and flange is in the nearly coil sides of secondary magnetic pole; Fig. 6 (b) is for having the cross cylinder of through hole centered by main pole, secondary magnetic pole center has through hole, and flange is nearly coil sides bottom secondary magnetic pole.
The version that Fig. 7 (a)-Fig. 7 (b) coordinates with permanent magnet for Combined iron core, Fig. 7 (a) is flange and permanent magnet frustum textural association form, Fig. 7 (b) for flange and permanent magnet be conical structure combining form.
Fig. 8 is the version of Combined iron core one end fluting, and have the plateau form that falls of through hole centered by main pole, secondary magnetic pole is the cylinder that centre has through hole, and flange is nearly coil sides bottom secondary magnetic pole.
Fig. 9 (a)-9 (b) is the two permanent magnet combination formula high-speed bidirectional electromagnet overall structure schematic diagram of radial multi-coil with cooling duct, center, and Fig. 9 (b) is cooling package close-up schematic view.
Figure 10 (a)-10 (b) is under electromagnet coil no power and "on" position, magnetic circuit circulation schematic diagram, Figure 10 (a) is electromagnet magnetic circuit schematic diagram during coil no power, and Figure 10 (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, Fig. 4 (a), Fig. 4 (b), Fig. 5, the composition of the first execution mode of the two permanent magnet combination formula high-speed bidirectional electromagnet of radial multi-coil of the present invention comprises shell body 7, Combined iron core 8, radial coil 4, back-moving spring 6, coil rack 5, snap ring 11, embedded valve pocket 14, sealing resin 12, armature 3 and valve rod 13.Have the cylinder of counter sink 31 centered by shell body 7, upper and lower side arranges fixing big nut 1; Fixing big nut 1 has annular groove 29 for lower surface, and groove center has the cylindrical structure of through hole 30; Combined iron core 8 has upper and lower two groups, is symmetrically distributed in armature both sides, is made up of main pole 17, secondary magnetic pole 16 and permanent magnet 2, the cylinder of ladder hole is had centered by its main pole 17, top has threaded aperture, coordinates with counter sink 31, is fixedly connected with by screw 15.Secondary magnetic pole 16 has groove 29 for upper and lower two ends, groove center has the cylinder of through hole 30, groove axially has two or three fan-shaped pylones 19, be evenly arranged in annular groove, part between adjacent two through hole 19 forms coil inner core 18, coil 4 radial direction is wound on inner core 18, and coil surface scribbles resin or other insulation heat proof material formation inductance loop seclusion bodies come retarder and cooling fluid.Main pole 17 radius R 2 is equal with secondary magnetic pole 16 central through hole radius R 1.Permanent magnet 2 is embedded between flange 9 and secondary magnetic pole 16, and adopt interference fit, its upper surface is concordant with flange 9 upper surface, and lower surface is concordant or lower slightly with iron core 9 lower surface; Its magnetizing direction is that radial radiation magnetizes.Valve rod and armature are fixed by snap ring 11, and valve rod 13 is through the embedded valve pocket 14 in the middle of main pole 17.After valve rod and armature are fixed by snap ring, be placed in shell body 7 with back-moving spring 6, secondary magnetic pole 16, coil 4 successively with main pole 17, permanent magnet 2 embeds between flange 9 and secondary magnetic pole 16 from bottom to top, and lower part erection sequence is identical with upper part, and shell body about 7 two ends arrange hold-down nut 15.Traditional single multiturn coil is carried out dispersed placement by the two permanent magnet combination formula high-speed bidirectional electromagnet of radial multi-coil, reduces the inductance of coil, improves the rate of climb and the rate of decay of electric current in coil, accelerate the response speed of electromagnet.
Composition graphs 6 (b), the second execution mode of radial multi-coil permanent magnetism king type high-speed bidirectional electromagnet of the present invention is on the basis of the first execution mode, change the textural association form of major-minor magnetic pole, main pole 17 is cross cylinder, outside big column axially has through hole 19, be evenly arranged on big column, form coil inner core between two grooves, coil winding is on inner core; Have the cylinder of through hole centered by secondary magnetic pole 16, flange is nearly coil sides bottom it.
Composition graphs 6 (b), 7 (a), Fig. 7 (b) simultaneously, the fit form of the third execution mode of radial multi-coil permanent magnetism king type high-speed bidirectional electromagnet of the present invention for a change flange 9 and permanent magnet 2, as shown in Fig. 6 (b), flange 9 and the fit form of permanent magnet 2 are that cylinder ring coordinates and flange width L1 is equal or bigger with permanent magnet width L2.As shown in Fig. 7 (a), 7 (b), flange 9 and the fit form of permanent magnet 2 are that circular cone ring coordinates and the bottom width L1 of flange is greater than permanent magnet bottom width L2.
Composition graphs 8,4th kind of execution mode of radial multi-coil permanent magnetism king type high-speed electro-magnet of the present invention changes on first three basis of planting execution mode to change the structure of iron core 8, becomes only opening concentric ring recesses at close armature end by all opening concentric ring recesses in the middle of its upper and lower both ends of the surface.Have the boss structure that falls of ladder hole centered by main pole 17, have the cylindrical structure of through hole centered by secondary magnetic pole 16, flange 9 is positioned at nearly coil sides bottom secondary magnetic pole 16.
Composition graphs 9 (a) simultaneously, Fig. 9 (b), the 5th kind of execution mode of radial multi-coil permanent magnetism king type high-speed bidirectional electromagnet of the present invention is on the basis of above execution mode, sets up center cooling package 21 at iron core 8 center.Cooling package comprises valve rod 13, back-moving spring 6, guiding valve 23, damping displacement adjustable ring 24, valve pocket 28, guiding valve 23 is provided with some damping holes 25 and is distributed on circumferentially same, guiding valve 23 spring 6 that is reset is pressed on damping displacement adjustable ring 24 in advance, has the boss structure of cylindrical hole centered by damping displacement adjustable ring 24.Valve pocket 28 is tightly placed on valve rod 13, reserves certain air gap with guiding valve 23; Armature, in motion process, can be flow through by the fuel oil compressed, effectively can take away the heat of coil and iron core, and reduce the damping force suffered by armature motion, accelerate the response speed of electromagnet from cooling package 21.
Figure 10 (a), 10 (b) show the operation principle of radial multi-coil permanent magnetism king type high-speed electro-magnet, as shown in Figure 10 (a), when top and the bottom coil all no power time, armature 3 is placed in centre position by back-moving spring 6, because the relative iron core magnetic resistance of the working gas gap existed between iron core 8 with armature 3 is comparatively large, permanent magnet 2 produces and arrive permanent magnet 2 again by iron core main pole 17, secondary magnetic pole 16 and the magnetic flux Φ that closes 3, wherein sub-fraction is formed and arrives the closed magnetic flux Φ of permanent magnet 2 again by interior working gas gap 27, armature 3, outer working gas gap 26 4.As shown in Figure 10 (b), when upper coil 4 is energized, during lower coil power-off, it produces the magnetic flux Φ arriving secondary magnetic pole 16 again through main pole 17, interior working gas gap 27, armature 3, outer working gas gap 26 and close 1; Because the magnetic induction line direction of now permanent magnet 2 generation is contrary with iron-core magnetic induction direction, now permanent magnet 2 produces the magnetic flux Φ that major part returns permanent magnet 2 through interior working gas gap 27, armature 3, outer working gas gap 26, main pole 17 and closes 2; The magnetic field produced after coil electricity and permanent magnet produce magnetic field complex 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; Along with the increase of drive current, when suction is greater than resistance suffered by armature 3, armature starts to the motion of iron core direction, until arrive maximum displacement place.When armature reaches maximum displacement place, the magnetic force holding armature attracting state of little drive current and small magnet can be relied on, reduce the eddy current loss and caloric value that maintain electric current and coil, reduce energy ezpenditure simultaneously.Flanged structure increases the adhesive area of iron core and armature simultaneously, makes through flange, the overall Magnetic Induction Density Distribution of armature also to be made more even, not easily occur the phenomenon of local Premature saturation by a magnetic induction line part for armature.And compared with tradition " E " type electromagnet, traditional single multiturn coil is carried out dispersed placement by the two permanent magnet combination formula high-speed bidirectional electromagnet of radial multi-coil, reduce the inductance of coil, improve the rate of climb and the rate of decay of electric current in coil, accelerate the response speed of electromagnet.Because electromagnet works in fuel oil environment always, fuel oil between armature and iron core is squeezed, extruded fuel oil also can be discharged from cooling package, also can be discharged by the discharge orifice 10 of external hull surface, 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 is subject to downward electromagnetic attraction, makes armature sharp downward movement, realizes the bidirectional reciprocating motion of valve rod.
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. a radial multi-coil combined high-speed bidirectional electromagnet, comprises two electromagnet, armature and valve rods; It is characterized in that: described electromagnet is radial multi-coil high-speed electro-magnet, comprise shell body, iron core and coil, described iron core is made up of main pole and secondary magnetic pole, main pole is cylinder, the cylinder of through hole is had centered by secondary magnetic pole, main pole is arranged in the through hole of secondary magnetic pole, shell body is enclosed within outside main pole, with bulge loop on main pole or secondary magnetic pole, described bulge loop axially has equally distributed fan-shaped or waist through hole, form coil inner core between adjacent two fan-shaped pylones, coil radial direction is wrapped on coil inner core, and the center of main pole has through hole; Two radial multi-coil high-speed electro-magnets share an armature and a valve rod, two radial multi-coil high-speed electro-magnet symmetries are installed, armature is between two radial multi-coil high-speed electro-magnets, and valve rod is through in the through hole at two main pole centers, and armature and valve rod are fixed.
2. radial multi-coil combined high-speed bidirectional electromagnet according to claim 1, it is characterized in that: described radial multi-coil high-speed electro-magnet also comprises permanent magnet, permanent magnet is the cylinder ring concentric with iron core, flange is stretched out bottom main pole or secondary magnetic pole, permanent magnet is embedded between flange and another magnetic pole, the upper surface of permanent magnet is concordant with lug upper surface, lower surface is concordant with iron core lower surface or lower slightly, the magnetizing direction of permanent magnet is that radial radiation magnetizes, two radial multi-coil high-speed electro-magnets have one end of permanent magnet relative.
3. radial multi-coil combined high-speed bidirectional electromagnet according to claim 2, it is characterized in that: described permanent magnet is the circular arc permanent magnet of decile and the distribution of decile uniform intervals, permanent magnet and the fit form of flange are that cylinder ring coordinates and flange width is equal with permanent magnet width or bigger.
4. radial multi-coil combined high-speed bidirectional electromagnet according to claim 2, it is characterized in that: described permanent magnet is the circular arc permanent magnet of decile and the distribution of decile uniform intervals, permanent magnet and the fit form of flange be circular cone ring coordinate and the bottom width of flange to be greater than permanent magnet bottom surface wide.
5., according to the radial multi-coil combined high-speed bidirectional electromagnet of claim 1-4 described in any one, it is characterized in that: described bulge loop and flange are arranged on the inwall of secondary magnetic pole.
6., according to the radial multi-coil combined high-speed bidirectional electromagnet of claim 1-4 described in any one, it is characterized in that: described bulge loop is arranged on the outer wall of main pole, described flange is arranged on the inwall of secondary magnetic pole.
7. according to the radial multi-coil combined high-speed bidirectional electromagnet of claim 1-4 described in any one, it is characterized in that: the through hole of main pole is shoulder hole, fluid power vibration damping cooling package is set in described shoulder hole, fluid power vibration damping cooling package comprises back-moving spring, guiding valve, damping displacement adjustable ring, guiding valve is provided with some damping holes and is distributed on circumferentially same, the boss structure of cylindrical hole is had centered by damping displacement adjustable ring, reserved one section of space between valve rod and guiding valve, guiding valve is positioned on damping displacement adjustable ring.
8. according to the radial multi-coil combined high-speed bidirectional electromagnet of claim 5 described in any one, it is characterized in that: the through hole of main pole is shoulder hole, fluid power vibration damping cooling package is set in described shoulder hole, fluid power vibration damping cooling package comprises back-moving spring, guiding valve, damping displacement adjustable ring, guiding valve is provided with some damping holes and is distributed on circumferentially same, the boss structure of cylindrical hole is had centered by damping displacement adjustable ring, reserved one section of space between valve rod and guiding valve, guiding valve is positioned on damping displacement adjustable ring.
9. radial multi-coil combined high-speed bidirectional electromagnet according to claim 6, it is characterized in that: the through hole of main pole is shoulder hole, fluid power vibration damping cooling package is set in described shoulder hole, fluid power vibration damping cooling package comprises back-moving spring, guiding valve, damping displacement adjustable ring, guiding valve is provided with some damping holes and is distributed on circumferentially same, the boss structure of cylindrical hole is had centered by damping displacement adjustable ring, reserved one section of space between valve rod and guiding valve, guiding valve is positioned on damping displacement adjustable ring.
CN201510907857.6A 2015-12-10 2015-12-10 Radial direction multi-coil combined high-speed bidirectional electromagnet Active CN105448457B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109448950A (en) * 2018-12-07 2019-03-08 太原理工大学 A kind of moving-magnet type proportional electromagnet of radial magnetizing

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CN104916385A (en) * 2015-06-23 2015-09-16 哈尔滨工程大学 Axial cooling and radial coil type high-speed electromagnet

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Publication number Priority date Publication date Assignee Title
CN2731675Y (en) * 2004-09-07 2005-10-05 籍鹏杰 Permanent magnet actuating gear of low voltage switch
CN1783365A (en) * 2004-11-22 2006-06-07 肯德隆磁技术有限公司 Bistable two-way electromagnet
CN101571206A (en) * 2009-06-15 2009-11-04 哈尔滨工程大学 Dual-coil electromagnetic valve
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109448950A (en) * 2018-12-07 2019-03-08 太原理工大学 A kind of moving-magnet type proportional electromagnet of radial magnetizing
CN109448950B (en) * 2018-12-07 2020-11-03 太原理工大学 Radial magnetizing moving-magnet type proportional electromagnet

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