CN201018324Y

CN201018324Y - Permanent-magnetic motor and magnet

Info

Publication number: CN201018324Y
Application number: CNU2006201605290U
Authority: CN
Inventors: 许孟原
Original assignee: Teco Electric and Machinery Co Ltd
Current assignee: Teco Electric and Machinery Co Ltd
Priority date: 2006-11-23
Filing date: 2006-11-23
Publication date: 2008-02-06
Anticipated expiration: 2016-11-23

Abstract

The utility model relates to a permanent magnetic motor and its magnet. The permanent magnetic motor comprises a rotor and a stator. The stator comprises a plurality of pole terminals, and the rotor is provided with a plurality of magnets corresponding with the pole terminals. The two sides of each magnet are internal concave surfaces, which can change the magnetic flow between pole terminals and magnets so as to lower the vibration of permanent magnetic motor.

Description

Magneto Motor And Magnet

Technical field

The utility model relates to a kind of permanent-magnet motor; Particularly relate to a kind of Magneto Motor And Magnet that improves vibration.

Background technology

Now in the industrial circle, often need provide power to do the motion of rotation or other form with driving device, this often with motor as power resources; Because motor can be converted into mechanical energy with electric energy or magnetic energy,, become a kind of indispensable equipment so be widely used on the devices such as various industry, electrical equipment, transportation system.

Motor is broadly divided into direct current, exchange, have brush or pattern such as brushless, generally speaking, the structure of motor is made up of rotor and stator, by the magnetic flux distribution between rotor and stator, impel rotor to be rotated motion, after this conduction that rotatablely moves come out, just can provide required mechanical energy.Wherein, utilize magnet itself to have the characteristic of magnetic, used the person that provides the magnetic flux, be permanent-magnet motor, because permanent-magnet motor can form bigger torque in limited volume, usefulness and accuracy are also higher, so attracted attention on market.

Please refer to Fig. 1, represent the three-dimensional exploded view of known permanent-magnet motor structure 10, it comprises rotor 11 and stator 13, rotor 11 is provided with a plurality of magnet 111, stator 13 is structure in the form of a ring then, and is equipped with a plurality of pole shoes 131 on inner edge, then can be arranged with coil on the pole shoe 131.Shown in the planar side view of Fig. 2, after treating that rotor 11 and stator 13 are sheathed mutually, just form air gap between rotor 11 and the stator 13, when coil alives, by just generating magnetic pole on the made pole shoe 131 of magnetic conductivity material, act on each other by the magnet 111 of rotor 11 and the pole shoe 131 of stator 13, i.e. generation rotatablely moves; Please referring again to Fig. 1, rotor 11 can also have axle 113, so that when rotor 11 is rotated motion, mechanical energy is conducted out, is made for further use.

Yet known permanent-magnet motor structure 10 ubiquities have vibration problem, and its reason is numerous, if get rid of technologic undesirable element, its influencing factor can be given an example as: the generation of the selecting for use of stator and rotor logarithm, harmonic wave, and air gap flux density etc.Wherein, harmonic wave can cause the flux waveforms distortion by air gap, is unfavorable for that motor turns round smoothly, and in other words, during as if the approaching more sine wave of air-gap flux waveform, then harmonic wave is more little, and relative vibration also can be more little, otherwise then vibration is big more; In addition, the power of air gap flux density also influences the amplitude of motor vibrations, and air gap flux density is high more, and vibration amplitude just can be big more.

In order to improve vibration problem, if take to reduce the mode of harmonic wave, then can do variation, for example: the both sides of skiving pole shoe, at pole shoe surface borehole or the like, so that the distortion of air-gap flux diminishes at stator pole shoes; Or have rotor surface is done variation (allow the surface have to be non-just round arc) or magnet surface is done camber design etc., its main purpose all is to allow the more approaching sine wave of air gap flux density.In addition, change on the air gap flux density common mode have: increase air gap effective length (for example increase the path of flux circuit, promptly increase magnetic resistance) or increase notch etc. on the rotor surface.

In particular, change in the known technology material and the shape of above-mentioned magnet 111 adjusting its magnetic flux density and to increase the magnetic resistance person, or have to dig on rotor 11 and establish dead slot, avoid the magnet short-cut path effect and reduce profile of tooth moment (Cogging Torque) person, it all attempts to reduce the vibration and the noise of motor.

Therefore, the magnet 111 of rotor 11 develops and multiple variation in configuration, is example with the rotor 11 with built-in magnet 111, and various known execution modes are shown in Fig. 3 A～3D; Wherein, magnet 111 shown in Fig. 3 A is curved shape, Fig. 3 B is carved with deep trench 115 on rotor 11, the magnet 111 of Fig. 3 C is rectangle, and rotor 11 surface and corresponding between the magnet 111, be provided with shallow trench 117 quarter, the magnet 111 of Fig. 3 D has the design of convex surface 111a in the outer surface direction towards rotor 11.Only above-mentioned known design still can't effectively be improved vibration, also difficultly effectively promotes usefulness, solves problems such as torque is not good.

In view of this, providing and can significantly reduce the permanent-magnet motor that vibration takes place, is industry problem demanding prompt solution for this reason.

Summary of the invention

A purpose of the present utility model is to provide a kind of Magneto Motor And Magnet, changes by magnet arrangement, and the magnetic resistance that can change air gap distributes, and then falls low logging torque, minimizing motor vibrations.

Another purpose of the present utility model is to provide a kind of Magneto Motor And Magnet, adopts the design of indent arc by the magnet both sides, can reduce harmonic wave, the magnetic resistance between stator and rotor is more evenly distributed, in order to do the vibration that reduces motor.

For reaching above-mentioned purpose, the utility model discloses a kind of permanent-magnet motor, above-mentioned permanent-magnet motor comprises stator and rotor, stator has circulus, and convex with a plurality of pole shoes in the inboard, and define the inner space, rotor is arranged at the inner space of stator, and having an outer surface and pole piece spacing is provided with, corresponding pole shoe also is equipped with a plurality of magnet, with first side and with respect to the setting that is adjacent to each other of second side of first side, it is characterized in that each first and second side has inner concave between each magnet.

The utility model still discloses a kind of magnet that is used for permanent-magnet motor, above-mentioned permanent-magnet motor has pole shoe, wherein, above-mentioned magnet comprises first surface, first side and with respect to second side of above-mentioned first side, above-mentioned first surface is towards the pole shoe setting of above-mentioned permanent-magnet motor, it is characterized in that above-mentioned first and second side respectively has an inner concave.

For above-mentioned purpose, technical characterictic and advantage can be become apparent, hereinafter be elaborated with the preferred embodiment conjunction with figs..

Description of drawings

Fig. 1 is the three-dimensional exploded view of known permanent-magnet motor structure;

Fig. 2 is the floor map of known permanent-magnet motor structure;

Fig. 3 A～3D is the floor map of known rotor;

Fig. 4 A is the floor map of the utility model stator;

Fig. 4 B is the floor map of the utility model preferred embodiment;

Fig. 5 is the floor map of another preferred embodiment of the utility model;

Fig. 6 A is the schematic diagram of the preferred embodiment of the utility model magnet; And

Fig. 6 B is the schematic diagram of another preferred embodiment of the utility model magnet.

The main element description of symbols

10 motor configurations, 11 rotors

111 magnet 111a convex surfaces

113 axles, 115 deep trench

117 shallow trenchs, 13 stators

131 pole shoes, 20 air gaps

30 motors, 31 rotors

311 magnet, 313 depressed parts

33 stators, 331 pole shoes

333 circuluses, 335 inner spaces

337 boots heads, 41 first surfaces

45 second sides, 43 first sides

The θ arc angle

Embodiment

Fig. 4 A, 4B are depicted as the floor map of permanent-magnet motor 30 of the present utility model, motor 30 comprises rotor 31 and stator 33, please earlier with reference to Fig. 4 A, be depicted as the floor map of stator 33, wherein stator 33 has a plurality of pole shoes 331 and circulus 333, pole shoe 331 promptly is convexly set in the inboard of circulus 333, and defines inner space 335 jointly, for ccontaining rotor 31.

Say that further shown in Fig. 4 B, rotor 31 has outer surface, when rotor 31 was placed in the inner space 335 of stator 33, the outer surface of rotor 31 and pole shoe 331 were to be provided with at interval, and more particularly, 31 of pole shoe 331 and rotors have air gap 20.In addition, rotor 31 is equipped with a plurality of magnet 311 corresponding to above-mentioned these pole shoes 331, the position that is provided with according to magnet 311, can comprise following manner, built-in magnet shown in Fig. 4 B (that is magnet 311 is arranged at rotor 31 inside), then (not shown as shown in Figure 5 for surface type magnet (that is magnet 311 is attached on the outer surface of rotor 31) or embedded type magnet, that is magnet 311 is embedded on the outer surface of rotor 31), all can be used for the utility model, do not limit at this.

Magnet 311 of the present utility model as shown in Figure 6A, it comprises first surface 41, first side 43 and with respect to second side 45 of above-mentioned first side 43, in fact, above-mentioned first surface 41 is positioned at the direction towards pole shoe 331, of the present utility model being characterised in that, first side 43 and second side 45 respectively have an inner concave, present the concave arc shape.In detail, the inner concave definable has arc angle θ, magnetic flux density and harmonic wave that the big I cooperation of arc angle θ is desired to reach are adjusted, to improve the motor vibrations problem, in other words, the inner concave that is designed to have arc angle θ by first side 43 and second side 45 with magnet 311, can obtain preferable magnetic flux distribution, and then the profile of tooth moment (Cogging Torque) that will make motor 30 obtains effectively to improve, learn through experiment, adopt side of the present utility model inner concave shape magnet 311, the profile of tooth moment of motor 30 can significantly reduce over half.Preferably, arc angle θ has preferable effect in 50 degree between 90 degree, is more preferred from about 70 degree.

Fig. 6 B is another embodiment of magnet 311 of the present utility model, and in this embodiment, except first side 43 and second side 45 respectively have the inner concave, first surface 41 in fact also can be outer convex surface, thereby also can have the effect of improving harmonic wave.In addition, also the top rake (not shown) can be carried out in magnet 311 both sides, also can suitably improve harmonic wave.So by above-mentioned exposure as can be known, the utility model magnet 311 still can cooperate other different design except that the person that has the inner concave of first side 43 and second side 45, all should belong to the scope that this case claim is protected.

In more detail, please referring again to Fig. 4 B and Fig. 5, when a plurality of magnet 311 are arranged at rotor 31, with first side 43, and the directional ring that abuts one another of second side 45 establish arrangement.Especially, on the outer surface of rotor 31, and on the position between corresponding each magnet 311, also comprise and be provided with a plurality of depressed parts 313, thereby, can increase the part magnetic resistance, be beneficial to design and form uniform magnetic resistance and distribute.Must explanation be that depressed part 313 can be Any shape, limit at this, for cooperating different magnet configuration, the demands such as magnetic resistance distribution desiring to reach, can do the part adjustment with regard to depressed part 313, to obtain preferable damping effect.

In addition, the outer surface profile of rotor 31 also can need not to be positive circle, say for example, on the outer surface of rotor 31,, also comprise a plurality of protuberance (not shown)s corresponding to the position of each magnet 311, that is the outer surface of rotor is on corresponding each magnet 311 position, the part is projection comparatively, and then changes the width of air gap 20, also helps to suppress the vibration of motor 30 when running.

Cooperating magnet of the present utility model, the pole shoe 331 of stator 33 also can be various multi-form, say for example, shown in Fig. 4 A, the boots head 337 of pole shoe 331 can also comprise the magnetic resistance part, for example in boots head 337, be provided with hole or be provided with groove etc., with further change magnetic flux density on pole shoe 331 surfaces.

Disclose as known technology, rotor 31 of the present utility model comprises armature spindle (not shown, can in the lump with reference to Fig. 1) equally in the center, and making rotor 31 is that the center rotates with the armature spindle, and armature spindle can conduct out with mechanical energy, in order to do for using.

By the disclosed Magneto Motor And Magnet of the utility model, magnet has the design of concave surface in both sides, can reduce harmonic wave, magnetic resistance is evenly distributed, and then fall the low logging torque, effectively reduces the vibration of motor,

The above embodiments only are used for exemplifying execution mode of the present utility model, and explain technical characterictic of the present utility model, are not to be used for limiting protection category of the present utility model.Any person of ordinary skill in the field can unlabored change or the arrangement of isotropism all belong to the scope that the utility model is advocated, rights protection scope of the present utility model should be as the criterion with claim.

Claims

1. permanent-magnet motor comprises:

Stator has circulus and a plurality of pole shoe, and above-mentioned a plurality of pole shoes are convexly set in the inboard of this circulus, and define the inner space; And

Rotor, has outer surface, above-mentioned rotor is arranged in the above-mentioned inner space, and the outer surface of above-mentioned rotor and above-mentioned a plurality of pole piece spacing are provided with, above-mentioned rotor also is equipped with a plurality of magnet corresponding to above-mentioned a plurality of pole shoes, wherein between each above-mentioned magnet with first side and with respect to the setting that is adjacent to each other of second side of above-mentioned first side;

It is characterized in that each above-mentioned first and second side has inner concave.

2. permanent-magnet motor according to claim 1 is characterized in that above-mentioned rotor also comprises armature spindle in the center, and above-mentioned rotor rotates along above-mentioned armature spindle.

3. permanent-magnet motor according to claim 1 is characterized in that above-mentioned a plurality of magnet is arranged at the inside of above-mentioned rotor.

4. permanent-magnet motor according to claim 1 is characterized in that above-mentioned a plurality of magnet is embedded on the outer surface of above-mentioned rotor.

5. permanent-magnet motor according to claim 1 is characterized in that above-mentioned a plurality of magnet is attached on the outer surface of above-mentioned rotor.

6. permanent-magnet motor according to claim 3 is characterized in that also including a plurality of depressed parts on the outer surface of above-mentioned rotor, and each above-mentioned depressed part correspondence is arranged between each above-mentioned magnet.

7. permanent-magnet motor according to claim 1 is characterized in that each above-mentioned magnet also comprises first surface in contiguous above-mentioned pole shoe, and above-mentioned first surface is outer convex surface.

8. permanent-magnet motor according to claim 1 is characterized in that also comprising a plurality of protuberances on the outer surface of above-mentioned rotor, and each raised part is arranged at the position corresponding to each above-mentioned magnet.

9. permanent-magnet motor according to claim 1 is characterized in that each above-mentioned pole shoe has the boots head, and above-mentioned boots head also comprises the magnetic resistance part.

10. permanent-magnet motor according to claim 9 is characterized in that above-mentioned magnetic resistance partly is hole.

11. permanent-magnet motor according to claim 9 is characterized in that above-mentioned magnetic resistance partly is groove.

12. magnet that is used for permanent-magnet motor, above-mentioned permanent-magnet motor has pole shoe, wherein, above-mentioned magnet comprises first surface, first side and with respect to second side of above-mentioned first side, above-mentioned first surface is towards the pole shoe setting of above-mentioned permanent-magnet motor, it is characterized in that above-mentioned first and second side respectively has an inner concave.

13. magnet according to claim 12 is characterized in that above-mentioned first surface is outer convex surface.