CN101237164A

CN101237164A - Limited corner permanent magnetic DC torque motor

Info

Publication number: CN101237164A
Application number: CNA2007100775946A
Authority: CN
Inventors: 李松
Original assignee: Haibeisi Intelligent Technology Co Ltd Shenzhen
Current assignee: Haibeisi Intelligent Technology Co Ltd Shenzhen
Priority date: 2007-12-05
Filing date: 2007-12-05
Publication date: 2008-08-06

Abstract

The invention provides a limited outer corner permanent magneto type DC torque motor, comprising a machine shell and a stator and a rotor which are received in the machine shell, wherein, the stator comprises a stator core and two winding coils; the stator core which is circular ring-shaped has the axial center provided with a through hole; the two winding coils which are independent to each other pass through the through hole and wind around the stator core respectively, and are symmetrically arranged on the stator core; the rotor which has an N pole and an S pole can be received in the through hole of the stator core; when the invention works, the rotating direction of the rotor is decided by the current direction of the winding coils and the magnetic pole directions of the N pole and the S pole of the rotor, and the torque of the rotor is decided by the current strength of the winding coils and the magnetic induction density of the rotor. The limited outer corner permanent magneto type DC torque motor of the invention has the advantages of simple structure, low cost, big output in the range of the set working stroke corner, quick response, no current commutation structure, good working stability and long service life, and dose not have the problems of the failed commutation, etc. and can work at a low speed and under the longtime locked rotor; as a result, the invention is suitable for popularization and application in industries such as electric locks and automatic control, etc.

Description

Limited corner permanent magnetic DC torque motor

Technical field

The present invention refers in particular to a kind of limited corner permanent magnetic DC torque motor about a kind of direct current machine.

Background technology

A kind of new type of safe technological prevention facility that electronic lock grew up as developing rapidly along with electronic technology in the last few years, it adopts electronic component and mechanical mechanism structure combining, control section uses electronic circuit, actuator uses motor driven machinery mechanism, compare with traditional mechanical door lock, it has strong security, and is safe, without metal key, advantage such as easy to use.

For a long time, electronic lock all adopts the driving servoelement of traditional direct current machine as its clutch or spring bolt mechanism, and the commutating frequency height the during work of traditional direct current machine, the induction reactance component is higher in the complex impedance of its excitation winding, the dc impedance of winding is lower, rated operational current under rated operational voltage depends primarily on the induction reactance component of its excitation winding, in case generation stall, induction reactance will finish the back in transient process and disappear, and rated operational voltage is added in generation overload on the lower winding D.C. resistance fully and winding is damaged.And there are problems such as mechanical wear, arc erosion and oxidation in traditional direct current machine because of commutator when work, and have phenomenons such as commutation " dead point ", contact resistance and wear out failure when causing traditional direct current machine to be used for the clutch of electronic lock and spring bolt mechanism servo-drive, cause the electronic lock that adopts traditional direct current machine to have less stable, short problems such as (being generally less than 100,000 work periods) of reliably working life-span.

Therefore job stability and the working life under the working condition such as response is all relatively poor fast in the frequent starting of electronic lock and commutation, nonlinear load, little impulse stroke for traditional direct current machine, has restricted the lifting of electronic door lock system technical performance.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of limited corner permanent magnetic DC torque motor, characteristics such as it has conversion efficiency height, good stability, motion is smooth-going, the life-span is long, can work under the stall operating mode have for a long time promoted job stability and working life that electronic lock clutch or dead bolt drive servo system significantly.

For being implemented in above-mentioned purpose, the invention provides a kind of limited corner permanent magnetic DC torque motor, comprise: casing and be contained in stator and rotor in the casing, stator comprises stator core and winding coil, it is circular that stator core is, axial centre has a through hole, and winding coil has two, and it is independent separately and pass through hole respectively and around stator core and be and be symmetricly set on the stator core; Rotor has N, the S utmost point, can be contained in the through hole of stator core.

Described limited corner permanent magnetic DC torque motor, wherein, stator also comprises two end cap, it is located at the stator core two ends, and can coat the end face of stator core respectively and suitably extend to the interior outer surface of stator core along the periphery of stator core end face, the surface of end cap relative stator iron core end face symmetry is relatively protruded and to be provided with four resisting blocks, thereby stator core is divided into two relative tooth utmost points, and two winding coils are concentrated respectively and are embedded in each tooth and extremely go up.

Described limited corner permanent magnetic DC torque motor wherein, leaves appropriate gap between two tooth utmost points, and two ends are placed on gap location and finally are connected together to extend also towards direction each other along the interior outer surface of stator core respectively.

In sum, limited corner permanent magnetic DC torque motor of the present invention, simple in structure, cost is low, and it is big to exert oneself in the impulse stroke scope of setting, response is fast, there is not problem such as commutation inefficacy etc. in the no current commutating structure, thereby good operating stability, long working life, and can under low speed and long-term stall, work, be adapted at the electronic lock industry and apply.

Description of drawings

Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effects apparent by the specific embodiment of the present invention is described in detail.

In the accompanying drawing,

Fig. 1 is the three-dimensional exploded view of limited corner permanent magnetic DC torque motor of the present invention;

Fig. 2-7 is the progressively assembly drawing of limited corner permanent magnetic DC torque motor of the present invention;

Fig. 8 is the magnetic structure figure of limited corner permanent magnetic DC torque motor of the present invention;

Fig. 9 is the transducing mechanism figure of limited corner permanent magnetic DC torque motor of the present invention.

Embodiment

Shown in Fig. 1-7, this limited corner permanent magnetic DC torque motor comprises: casing 1, be contained in stator 2 and rotor 3 in the casing 1.

Stator 2 comprises stator core 28 and winding coil 26.Stator core 28 is made circular by the multi-disc ferromagnet, axial centre has a through hole 29, and

end cap

20,21 is established at two ends respectively.This

end cap

20,21 can coat the end face of stator core respectively and suitably extend to the interior outer surface of stator core 28 along the periphery of stator core 28 end faces.The surface of

end cap

20,21 relative stator iron cores 28 end faces symmetry protrusion relatively is provided with four resisting blocks 22, stator core 28 is divided into a pair of relative tooth

utmost point

24,25, embed respectively on this relative tooth utmost point 24 and concentrate winding coil 26,27, winding coil 26,27 to pass two teeth that through hole 29 is wound on stator core 28 extremely to go up.These two winding coils are mutually independent, and can give one group of winding coil energising separately during actual the use, also can switch on simultaneously by two winding coils.Also leave appropriate gap between the tooth

utmost point

24,25,

end cap

20,21 extends along the interior outer surface of stator core 28 towards direction each other respectively and finally is connected together in gap location, thereby winding coil 26 is fixed on the stator core 28.

Rotor 3 comprises rotor core 36 and rotor cover 30, and rotor core 36 is made bar shaped by the rare earth permanent magnet material, has N, the S utmost point 34,35.Rotor core 36 is contained in the rotor cover 30, and rotor cover 30 has the host cavity (not shown) of accommodating rotor core 36.Rotor overlaps 30 two ends and establishes opening 31,32 respectively, and the N of rotor core 36, the S

utmost point

34,35 can be exposed to outside the rotor cover 30 by opening 31,32.The direction that rotor overlaps 30 vertical rotor core 36N, the S utmost point is arranged with rotating shaft 33, rotating shaft 33 also is provided with axle sleeve 37 with the position that support 10 is connected with

cover

11,33 liang of free ends of rotating shaft are fixed on support 10 and the cover 11 by axle sleeve 37 respectively, and support 10 and cover 11 centers are provided with to be convenient to rotating shaft 33 and to wear the hole slot 13 that passes through.

Casing 1 is made up of support 10 and cover 11, and cover 11 is connected on the support 10 by screw.Establish reception room 12 in the support 10, stator 2 is contained in the reception room 12, and stator 2 outer peripheral edges fasten in the inwall of reception room 12.Rotor core 36 is contained in stator core 28 through holes 29 with rotor cover 30, and during free state, rotor core 36 can revolve be parked in the impulse stroke arbitrarily angled.During winding coil 26,27 energisings, exciting current must guarantee the corresponding winding coil current opposite in direction of the S utmost point 35 of the sense of current and rotor core of winding coil of the N utmost point 34 correspondences of rotor core, that is: when the sense of current of the winding coil of the N of the rotor core utmost point 34 correspondences was outside along paper, then the sense of current of the winding coil of the S utmost point 35 correspondences of rotor core was inside along paper.

Rotor core 36 is contained in the stator 2 and can is that axis rotates freely in through hole 29 with rotating shaft 33, and its surfaces of revolution is parallel to stator core 28 cross sections.When 26,27 energisings of stator 2 winding coils, rotor core 36 can drive rotating shaft 33 and rotate on its surfaces of revolution.When the magnetic direction of rotor core 36 and stator 2 winding coils 26,27 senses of current were condition shown in Figure 9, rotor 3 was the clockwise direction rotation, and stator 2 winding coils 26,27 senses of current are shown in Figure 9 when reverse, and rotor 3 is rotation counterclockwise.

Consult Fig. 8-9, the operation principle of limited corner permanent magnetic DC torque motor of the present invention is as follows:

Limited corner permanent magnetic DC torque motor stator 2 of the present invention is circular, and permanent magnet rotor core 36 places in the annular ferromagnet stator 2, and main flux 4 forms the semicircle closed magnetic circuit of two sealings in stator core 28.Be wound on the inner ring electromagnetic wire of the excitation winding 26,27 on the stator 2, perpendicular quadrature passes main flux 4.When excitation winding 26,27 has electric current to flow through electromagnetic wire, promptly can pass magnetic force induced electricity (Ampere force) 5 on the electromagnetic wire of magnetic field part in excitation winding.Symmetric arrangement and the reaction force that is fixed on 26,27 magnetic force induced electricity of excitation winding on the stator 2 produce the opposite tangential couple 6 of direction on rotor core 36, thereby make rotor core 36 produce torque under tangential couple 6 effects and then drive rotor 3 rotations.

When limited corner permanent magnetic DC torque motor of the present invention is worked, winding coil 26, the N of 27 the sense of current and rotor 3, S pole orientation decision rotor 3 rotation directions, winding coil size of current and rotor magnetic flux density decision rotor torque, in the impulse stroke scope of setting, 36 need of rotor core turn over a specific angle under the effect of tangential couple, and need not in the surfaces of revolution, continuously to rotate, need not the switched energization winding when therefore working and form rotating magnetic field, so need not the excitation winding commutator structure, so do not have the commutator contact loss, and magnetic hysteresis loss, eddy current loss is also far below traditional direct current machine.And, since rotor torque be proportional to pass magnetic field envelope exciting current between rotor and stator induct Ampere force vector and, and excitation winding evenly distributes in complete impulse stroke, thereby the magnetic field envelope induct the vector of Ampere force and in complete impulse stroke in theory each point equate, thereby when exciting current is constant, there are not the breakpoint or the increment saltus step of rotor torque in any one complete one-way only operation stroke in theory, thereby can make the motion of motor smooth-going.In addition, limited corner permanent magnetic DC torque motor of the present invention need not commutation in a complete one-way only operation stroke, thereby the induction reactance component is lower in the complex impedance of its excitation winding, the dc impedance of winding is higher, rated operational current under rated operational voltage depends primarily on the dc impedance of its excitation winding, when stall takes place, because the dc impedance of excitation winding is higher, though thereby induction reactance when disappearing the excitation winding electric current under the rated operational voltage rise to some extent, but still be limited in the scope that to carry by the excitation winding dc impedance, thereby, limited corner permanent magnetic DC torque motor of the present invention can be under the stall operating mode long-term work and can not produce overload and damage.

The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of accompanying Claim of the present invention.

Claims

1, a kind of limited corner permanent magnetic DC torque motor, it is characterized in that, comprise: casing and be contained in stator and rotor in the casing, stator comprises stator core and winding coil, it is circular that stator core is, axial centre has a through hole, and winding coil has two, and it is independent separately and pass through hole respectively and around stator core and be and be symmetricly set on the stator core; Rotor has N, the S utmost point, can be contained in the through hole of stator core.

2, limited corner permanent magnetic DC torque motor as claimed in claim 1, it is characterized in that, stator also comprises two end cap, it is located at the stator core two ends, and can coat the end face of stator core respectively and suitably extend to the interior outer surface of stator core along the periphery of stator core end face, the surface of end cap relative stator iron core end face symmetry is relatively protruded and to be provided with four resisting blocks, thereby stator core is divided into two relative tooth utmost points, and two winding coils are concentrated respectively and are embedded in each tooth and extremely go up.

3, limited corner permanent magnetic DC torque motor as claimed in claim 2, it is characterized in that, leave appropriate gap between two tooth utmost points, two ends are placed on gap location and finally are connected together to extend also towards direction each other along the interior outer surface of stator core respectively.

4, limited corner permanent magnetic DC torque motor as claimed in claim 1 is characterized in that, rotor comprises a rotor core, and rotor core is bar shaped, has N, the S utmost point.

5, limited corner permanent magnetic DC torque motor as claimed in claim 1 is characterized in that, rotor also comprises a rotor cover, and the rotor cover has a host cavity, and rotor is contained in the host cavity, and rotor is contained in the stator core through hole with the rotor cover.

6, limited corner permanent magnetic DC torque motor as claimed in claim 5 is characterized in that, the rotor cover also is provided with two openings, and the N of rotor, the S utmost point can be exposed to outside the rotor cover by opening.

7, limited corner permanent magnetic DC torque motor as claimed in claim 5 is characterized in that, the rotor cover is provided with rotating shaft along the direction of vertical rotor N, the S utmost point.

8, limited corner permanent magnetic DC torque motor as claimed in claim 7, it is characterized in that, casing is made up of support and cover, establish reception room in the support, stator is contained in the reception room, and the stator outer peripheral edges fasten the sidewall in reception room, and rotating shaft two free ends are individually fixed on support and the cover, and support and cover center are provided with to be convenient to rotating shaft and to wear the hole slot that passes through.

9, limited corner permanent magnetic DC torque motor as claimed in claim 1 is characterized in that, rotor core is made by the rare earth permanent magnet material.

10, limited corner permanent magnetic DC torque motor as claimed in claim 1 is characterized in that, stator core is made by ferrimagnet.