CN201252427Y

CN201252427Y - Motor structure

Info

Publication number: CN201252427Y
Application number: CNU2008201348286U
Authority: CN
Inventors: 赵彦智
Original assignee: LNC TECHNOLOGY Co Ltd
Current assignee: LNC TECHNOLOGY Co Ltd
Priority date: 2008-09-11
Filing date: 2008-09-11
Publication date: 2009-06-03
Anticipated expiration: 2018-09-11

Abstract

The utility model relates to a built-in permanent magnetism motor, in particular to a motor structure capable of eliminating torque surging. The built-in permanent magnetism is provided with a stator and a rotor arranged in the stator, wherein a plurality of magnets with corresponding number of poles are arranged in the rotor. The built-in permanent magnetism motor is characterized in that a plurality of arc-convex parts corresponding to the magnets are formed on the outer peripheral face of the rotor close to the inner peripheral face of the stator, and an arc-concave part is formed between adjacent arc-convex parts. The sine distribution of magnetic force on the surface of the rotor can be rectified through the characteristic that an untrue circle is formed on the outer peripheral face of the rotor so as to reduce the discontinuous rotation torque of the motor and further improve the efficiency and the torque of the motor.

Description

Motor configuration

Technical field

The utility model relates to a kind of rotor structure of built-in type permanent-magnet motor.

Background technology

Motor is indispensable important driving arrangement in industry, and it is widely used in various motors, transportation system or the like, and its main operating principle is mechanical energy for converting electric energy to, and does actions such as rotation or vibration with driving device.Reach big torque in limited volume and the material and how to utilize, and keep high-effect and high control accuracy, built-in type permanent-magnet motor (IPM) is preferable selection.Described built-in type permanent-magnet motor often improves magnetic density by improving rotor, has realized the high moment of torsion under the high rotating speed, has improved the performance of motor greatly.

The purpose of the rotor shapes design of built-in type permanent-magnet motor and the prominent electrode structure setting of magnet all has been improvement reluctance torque performance, raising magnetic density.Reluctance torque can be utilized to increase the moment of torsion output of motor, but this needs a more complicated servo amplifier and control algorithm.In some suitable applications occasion, motor rotor is dashed forward and extremely can also be simplified no sensor feedback The Application of Technology.

A tangible benefit of interior magnet structure is exactly the diameter that reduced rotor, has reduced moment of inertia.

For this reason, the industry exploitation has the improvement design of multiple built-in type permanent-magnet motor, as U.S. Pat 6,008, No. 559, US6,034, No. 458, US6,177, No. 745, US6,340, No. the 521923rd, No. 857 and Taiwan patent announcement and bulletin I256191 number or the like, it all lowers cogging torque or revises sinusoidal surging or adjust magnetic flux density or increase reluctance torque waiting by different magnetite shape, set-up mode or gap, reducing vibrations and noise, even improves rotating torques and running usefulness.

With TaiWan, China patent announcement wherein is for I256191 number example, it is as shown in Figures 1 to 4, described built-in type permanent-magnet motor includes the stator 10 and a rotor 20 of an inner tool plural number winding slot 15, its rotor 20 is to be stacked into the stack length of being desired by plural number through the silicon steel sheet of punching press, be fixed into cylindric again, and rotor 20 can be set in winding slot 15 scopes of stator former 10, and the outer rim of rotor 20 is the peripheries 21 that form round type, and rotor 20 is formed with the plural storage tank 22 of corresponding number of poles at contiguous periphery 21 places, each storage tank 22 is arranged with the magnetite 25 of a corresponding shape, and magnetite 25 has a gap 23 at least with storage tank 22 both sides.By above-mentioned design, utility model people thinks that it can adjust the distribution of the space magnetic flux density of 20 of motor stator 10 and rotors, makes the back emf waveform of motor and the target that torque characteristics reaches design.

Yet it still can't effectively overcome the problem of sinusoidal surging and Sine distribution, and then causes the raising of motor cogging torque, reduces the smooth-going degree of its running, even reduces its running usefulness and rotating torques.

In view of this, the utility model designer relies on research and development and the manufacturing experience of being engaged in related industry for many years, deeply inquire into according to the problem that aforementioned existing built-in type permanent-magnet motor is faced, research and development through constantly making great efforts, finally success develop a kind of motor configuration, cross problems such as height to overcome the not good and cogging torque of its sinusoidal waveform profile.

Summary of the invention

Therefore, the utility model mainly is to provide a kind of motor configuration, becomes Sine distribution to revise rotor surface magnetic force, to lower the response of motor cogging torque, promotes the smooth-going degree of running.

Again, the utility model is in addition providing a kind of motor configuration, can reducing cost of manufacture, and can promote running usefulness and rotating torques.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of motor configuration is characterized in that, includes at least:

One stator, it has a circular chamber, and described stator is formed with the winding slot of plural number at the inner edge of adjacent cavity;

One rotor, the outer peripheral face with a corresponding aforementioned cavity, described outer peripheral face are to be non-proper circle shape, and the inherent contiguous outer peripheral face of rotor place is formed with the storage tank of plural number, are provided with the Permanent magnet of correspondingly-shaped in the storage tank.

Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be: the rotor outer peripheral face forms the characteristic of non-proper circle, and can revise the Sine distribution of rotor surface magnetic force, so can lower the cogging torque of motor, can promote the smooth-going degree of motor running, and the efficient and the torque that can improve motor, with the surcharge of increase built-in type permanent-magnet motor, and promote competitiveness of product and economic benefit.

Description of drawings

Fig. 1 is the cut-away section side schematic view that the TaiWan, China patent is implemented structure for I256191 number;

Fig. 2 is the generalized section that the TaiWan, China patent is implemented structure for I256191 number;

Fig. 3 is the side-looking generalized section of existing built-in type permanent-magnet motor;

Fig. 4 is the local enlarged diagram of the section of Fig. 3 built-in type permanent-magnet motor A part;

Fig. 5 is the side-looking generalized section of the utility model built-in type permanent-magnet motor;

Fig. 6 is the rotor enlarged diagram of the utility model built-in type permanent-magnet motor B part;

Fig. 7 is the rotor schematic diagram of the utility model built-in type permanent-magnet motor.

Embodiment

The utility model is a kind of motor configuration, please cooperate referring to Fig. 5 and disclose, and described built-in type permanent-magnet motor comprises a stator 50 and a rotor 60 at least, and its rotor 60 is to be contained in stator 50 inside, but and rotor 60 relative stator 50 high speed rotating;

And about the detailed formation of the utility model preferred embodiment, then further consult Fig. 5, Fig. 6 and Fig. 7 those disclosed herein, stator 50 has the circular chamber 51 of a ccontaining rotor 60, and stator 50 is formed with the winding slot 55 of plural number at the inner edge of adjacent cavity 51, the formation and the principle of relevant stator 50 are same as the prior art, repeat no more;

Rotor 60 is by plural silicon steel sheet punch forming again, and after the stack length of desiring through being stacked into, give the stationary cylinder shape, described rotor 60 has the outer peripheral face 61 of corresponding stator 50 chambers 51, described outer peripheral face 61 is to be non-round type, rotor 60 outer peripheral faces 61 of the present utility model are to be designed to the equidistant arc protuberance 62 of plural number according to the motor number of poles, make rotor 60 outer peripheral faces 61 and 51 of stator 50 chambers be formed with the equidistant recessed gap 63 of arc of plural number, as shown in Figure 6, can be used for eliminating surging, become Sine distribution and can revise rotor surface magnetic force, rotor 60 inherent contiguous outer peripheral faces 61 places are formed with the storage tank 64 of plural corresponding arc protuberance 62 again, are provided with the Permanent magnet 65 of correspondingly-shaped in the storage tank 64;

So, group formation one can be revised the motor configuration that surperficial magnetic force becomes Sine distribution.

As for built-in type permanent-magnet motor of the present utility model in effect that practical operation produced, then please cooperate and consult Fig. 6 and shown in Figure 7, when rotor 60 relative stator 50 high speed rotating, because the outer peripheral face 61 of rotor 60 is the characteristics that are non-round type, make rotor 60 can utilize arc protuberance 62 and the recessed gap 63 of arc, eliminate surging as shown in Figure 7, become Sine distribution and can revise rotor surface magnetic force, to lower the response of motor cogging torque, and the smooth-going degree of lifting running, simultaneously cost of manufacture can be reduced, further running usefulness and rotating torques can be promoted.

More than explanation is just illustrative for the utility model; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within the protection range of the present utility model.

Claims

1. a motor configuration is characterized in that, includes at least:

2. according to the described a kind of motor configuration of claim 1, it is characterized in that described rotor is by plural silicon steel sheet punch forming.

3. according to the described a kind of motor configuration of claim 1, it is characterized in that described rotor is by plural silicon steel sheet punch forming, and after the stack length of desiring through being stacked into, is fixed into cylindric.

4. according to the described a kind of motor configuration of claim 1, it is characterized in that described rotor is contained in the chamber of stator former, and can the relative stator rotation.

5. according to the described a kind of motor configuration of claim 1, it is characterized in that described rotor outer peripheral face is to be designed to the equidistant arc protuberance of plural number according to the motor number of poles, and be formed with the equidistant recessed gap of arc of plural number between rotor outer peripheral face and stator chamber.