CN104485762B - A kind of permanent-magnetic synchronous motor rotor and permagnetic synchronous motor - Google Patents

A kind of permanent-magnetic synchronous motor rotor and permagnetic synchronous motor Download PDF

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Publication number
CN104485762B
CN104485762B CN201410658247.2A CN201410658247A CN104485762B CN 104485762 B CN104485762 B CN 104485762B CN 201410658247 A CN201410658247 A CN 201410658247A CN 104485762 B CN104485762 B CN 104485762B
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CN
China
Prior art keywords
permanent magnet
rotor
synchronous motor
tangential
radial
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CN201410658247.2A
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CN104485762A (en
Inventor
肖勇
李小飞
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Gree Electric Appliances Inc of Zhuhai
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Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures

Abstract

The invention discloses a kind of permanent-magnetic synchronous motor rotor and permagnetic synchronous motor, belongs to permagnetic synchronous motor technical field, is designed to solve the problems such as existing permanent-magnetic synchronous motor rotor leakage field is big, permanent magnet utilization rate is low, influences motor performance and efficiency.Permanent-magnetic synchronous motor rotor includes rotor core, and n tangential permanent magnet body of even number is radially evenly equipped with rotor core, and the identical polar of two neighboring tangential permanent magnet body is relative;One end both sides of each tangential permanent magnet body on the inside of rotor core are respectively symmetrically arranged with a radial permanent magnet body;Two folded radial permanent magnet dignity have identical polar to stator direction between two neighboring tangential permanent magnet body, and have magnetic bridge between two radial permanent magnet bodies.Also disclose a kind of permagnetic synchronous motor for including above-mentioned rotor.Present invention decreases leakage field of the tangential permanent magnet body on the inside of rotor, permanent magnet utilization rate is improved, improves electric efficiency and electric machine structure intensity.

Description

A kind of permanent-magnetic synchronous motor rotor and permagnetic synchronous motor
Technical field
The invention belongs to permagnetic synchronous motor technical field, more particularly to a kind of permanent-magnetic synchronous motor rotor and there is this turn The permagnetic synchronous motor of minor structure.
Background technology
The motor of the tangential magnetization configuration of permanent magnet compared with radial structure due to that with " poly- magnetic " effect, can produce higher Air gap flux density so that motor has larger torque/electric current ratio and torque/volume ratio, is applied to servo system more and more The occasions such as system, electric propulsion, office automation, household electrical appliance.
But tangential permanent magnet motor is easily forming leakage field close to the inner side of rotating shaft, in order to reduce leakage field, it is necessary in rotor Side sets magnetic bridge, even if setting magnetic bridge, still there is on the inside of rotor that leakage field is big, permanent magnet utilization rate is low, influences motor The problem of energy and electric efficiency, and the increase of leakage field can also bring vibration and the noise problem of motor.
The content of the invention
An object of the present invention is to propose a kind of leakage field for reducing tangential permanent magnet body on the inside of rotor, improves rotor machinery Intensity, improve the permanent-magnetic synchronous motor rotor of electric efficiency.
The second object of the present invention is to propose a kind of leakage field for reducing tangential permanent magnet body, increases the permanent magnet flux linkage of motor, carries The permanent-magnetic synchronous motor rotor of high radial permanent magnet utilization rate.
The third object of the present invention is to propose a kind of anti-demagnetization performance for improving tangential permanent magnet body, reduces tangential permanent magnet body The permanent-magnetic synchronous motor rotor of brow leakage.
The fourth object of the present invention is to propose a kind of permanent-magnetic synchronous motor rotor for the demagnetization for slowing down radial permanent magnet body.
The fifth object of the present invention is to propose a kind of leakage field for reducing radial permanent magnet body, improves the permanent magnetism of rotor mechanical strength Synchronous electric motor rotor.
The sixth object of the present invention is to propose a kind of reduction motor flux leakage, improves permanent magnet utilization rate, improves electric efficiency With the permagnetic synchronous motor of electric machine structure intensity.
To use following technical scheme up to this purpose, the present invention:
It is radially equal on the rotor core the invention provides a kind of permanent-magnetic synchronous motor rotor, including rotor core N tangential permanent magnet body of even number is furnished with, the identical polar of the two neighboring tangential permanent magnet body is relative;
One end both sides of each tangential permanent magnet body on the inside of the rotor core are respectively symmetrically arranged with a footpath To permanent magnet;
Two folded radial permanent magnet dignity have phase to stator direction between the two neighboring tangential permanent magnet body Same polarity, and there is magnetic bridge between two radial permanent magnet bodies.
Further, the shape of cross section of the radial permanent magnet body is plate shaped or arc.
Further, the thickness M of the radial permanent magnet body and the thickness S of the tangential permanent magnet body ratio M/S are 0.35- 1.5。
Further, have between the radial permanent magnet body of symmetrically arranged two of one end both sides of the tangential permanent magnet body Space, the length L in the space and the thickness S of the tangential permanent magnet body ratio L/S are 0.7-1.5.
Further, the width G of the magnetic bridge and the thickness M of radial permanent magnet body ratio G/M are 0.05-0.4.
Further, the width of the magnetic bridge on the inside of rotor to rotor outside by tapering into.
Further, the even number n is the even number more than or equal to 4.
Present invention also offers a kind of permagnetic synchronous motor, including stator, in addition to permagnetic synchronous motor described above to turn Son.
Beneficial effects of the present invention are:
(1) it is tangential by the way that two radial permanent magnet bodies are arranged on into one the invention provides a kind of permanent-magnetic synchronous motor rotor The both sides of permanent magnet, it can cause magnetic bridge more saturation using a part of leakage field of radial permanent magnet body, reduce tangential permanent magnet Leakage field of the body on the inside of rotor, main flux caused by tangential permanent magnet body is added, meanwhile, radial permanent magnet body can also provide one Part main flux, the air gap flux density of expanded motor, electric efficiency is improved, and cause rotor to have preferably machinery strong Degree.
(2) the thickness M of the radial permanent magnet body and thickness S of tangential permanent magnet body ratio M/S is arranged on to 0.35-1.5 model In enclosing, the leakage field of tangential permanent magnet body can be substantially reduced, supplement air-gap field well so that rotor permanent magnetism stator around Magnetic linkage caused by group is in higher level, that is, causes motor to have larger permanent magnet flux linkage, while improve radial permanent magnet The utilization rate of body.
(3) the gap lengths L having between the symmetrically arranged two radial permanent magnet bodies in one end both sides of tangential permanent magnet body In the range of being arranged on 0.7-1.5 with the thickness S of tangential permanent magnet body ratio L/S, the anti-demagnetization of tangential permanent magnet body can be improved Performance so that motor has preferable anti-demagnetization capability, can also reduce the brow leakage of tangential permanent magnet body so that motor flux leakage It is less.
(4) in the range of the ratio G/M of the width G of magnetic bridge and the thickness M of radial permanent magnet body being arranged on into 0.05-0.4, It can ensure that the leakage field of radial permanent magnet body is smaller, while slow down the demagnetization of radial permanent magnet body.
(5) width of magnetic bridge can be unequal, i.e., the width of magnetic bridge is tapered into by rotor inner side to rotor outside, Ensure to effectively increase the mechanical strength of rotor in the case of the leakage field of radial permanent magnet body is less.
(6) present invention also offers a kind of permagnetic synchronous motor for including above-mentioned permanent-magnetic synchronous motor rotor structure, not only So that motor flux leakage is reduced, and permanent magnet utilization rate is improved, improve electric efficiency and electric machine structure intensity.
Brief description of the drawings
Fig. 1 is the structural representation of the permanent-magnetic synchronous motor rotor of the embodiment of the present invention one;
Fig. 2 is the structural representation of the permanent-magnetic synchronous motor rotor of the embodiment of the present invention two;
Fig. 3 is the structural representation of the permanent-magnetic synchronous motor rotor of the embodiment of the present invention three;
Fig. 4 is the structural representation of the permanent-magnetic synchronous motor rotor of the embodiment of the present invention four;
Fig. 5 is the partial enlarged drawing at A in Fig. 4;
Fig. 6 is the structural representation of the permagnetic synchronous motor of the embodiment of the present invention five;
Fig. 7 is influence figures of the permanent magnet thickness ratio M/S of the embodiment of the present invention one to magnetic linkage;
Fig. 8 is the radial permanent magnet body distance ratio L/S of the embodiment of the present invention one to demagnetization and the influence figure of leakage field.
In figure, 1, rotor core;11st, tangential permanent magnet body;12nd, radial permanent magnet body;2nd, magnetic bridge;3rd, space;4th, stator.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by specific embodiment.
Embodiment one:
A kind of permanent-magnetic synchronous motor rotor provided by the invention, structure such as Fig. 1, Fig. 7 of the permanent-magnetic synchronous motor rotor and Shown in Fig. 8, it includes rotor core 1, is radially evenly equipped with 6 tangential permanent magnet bodies 11 on rotor core 1, it is two neighboring it is tangential forever The identical polar of magnet 11 is relative, that is to say, that the side of a tangential permanent magnet body 11 is N poles (or S poles), close to the side and with Its another relative side of tangential permanent magnet body 11 is similarly N poles (or S poles).Close to the inner side of rotor core 1 it is each it is tangential forever One end both sides of magnet 11 are respectively symmetrically arranged with a radial permanent magnet body 12.Two folded by between two neighboring tangential permanent magnet body 11 Individual radial permanent magnet body 12 has identical polar in face of stator direction, and the polarity is with two neighboring tangential permanent magnet body 11 adjacent to side Polarity is identical, meanwhile, there is magnetic bridge 2, the width of magnetic bridge 2 in the present embodiment between folded two radial permanent magnet bodies 12 By equal to rotor outside on the inside of rotor.
By the way that two radial permanent magnet bodies 12 to be arranged on to the both sides of a tangential permanent magnet 11, the one of radial permanent magnet body 12 is utilized Part leakage field can cause the more saturation of magnetic bridge 2, reduce leakage field of the tangential permanent magnet body 11 on the inside of rotor, add tangential Main flux caused by permanent magnet 11, meanwhile, radial permanent magnet body 12 can also provide a part of main flux, the air gap of expanded motor Magnetic is close, improves electric efficiency, and cause rotor to have preferable mechanical strength.
In the present embodiment, the shape of cross section of each radial permanent magnet body 12 is plate shaped, and further, this is plate shaped to be One right-angled trapezium, the shorter upper bottom of right-angled trapezium length are located on the inside of rotor, and the longer bottom of length is located on the outside of rotor, and directly The trapezoidal oblique waist in angle is away from tangential permanent magnet body 11.
The thickness M of radial permanent magnet body 12 and the thickness S of tangential permanent magnet body 11 ratio M/S have to the leakage field of tangential permanent magnet body Very big influence.As shown in fig. 7, ratio M/S [0.1,0.35) scope when, tangential permanent magnet body drain magnetic is more serious;As ratio M/S When increasing to [0.35,1.5] scope, the leakage field of tangential permanent magnet body is significantly reduced, supplements air-gap field well so that motor Rotor permanent magnet caused magnetic linkage on stator winding is in higher level, so that motor has larger permanent magnet flux linkage, The utilization rate of radial permanent magnet body is improved simultaneously;When ratio M/S continues to increase to (1.5,3.25] scope when, to motor Permanent magnet flux linkage contribution is little, and the thickness for increasing radial permanent magnet body 12 can increase manufacturing cost, cause to waste.Therefore, ratio M/S Preferably 0.35-1.5 scope.
There is space 3 between the symmetrically arranged two radial permanent magnet bodies 12 in one end both sides of tangential permanent magnet body 11, space 3 The length L and thickness S of tangential permanent magnet body 11 ratio L/S has a significant impact to the demagnetization current and leakage magnetic flux of tangential permanent magnet body. As shown in figure 8, ratio L/S [0,0.7) scope when, i.e. two radial permanent magnet bodies 12 cause the He of radial permanent magnet body 12 at a distance of too small Tangential permanent magnet body 11 has certain coincidence, easily causes the end of tangential permanent magnet body 11 to occur when stator applies outside opposing magnetic field tight The demagnetization of weight;When ratio L/S increases to [0.7,1.5] scope, the end local demagnetization of tangential permanent magnet body 11 is slow down significantly, is carried The high anti-demagnetization performance of tangential permanent magnet body so that motor has preferable anti-demagnetization capability;When ratio L/S is continued to increase to During (1.5,1.9) scope, two radial permanent magnet bodies 12 are excessive apart, and tangential permanent magnet body 11 forms leakage field in hole 3, it is impossible to very well Reduction its end leakage.Therefore, ratio L/S is preferably 0.7-1.5 scope.
Similarly, in order to be reduced as far as the leakage field of radial permanent magnet body, the demagnetization of radial permanent magnet body is slowed down, magnetic bridge 2 Width G and the thickness M of radial permanent magnet body 12 ratio G/M are preferably provided at 0.05-0.4 scope.
Embodiment two:
Present embodiments provide a kind of permanent-magnetic synchronous motor rotor, structure and the embodiment one of the permanent-magnetic synchronous motor rotor Described rotor structure is essentially identical, will not be repeated here.
Difference part is:As shown in Fig. 2 the shape of cross section of each radial permanent magnet body is circular arc, further, should Circular arc is a circular arc vertical bar, and circular arc vertical bar has two circular arc sides being oppositely arranged and two straight sides being oppositely arranged Side, and two circular arc sides along rotor circumferentially, two straight sides are arranged along rotor radial.
Embodiment three:
Present embodiments provide a kind of permanent-magnetic synchronous motor rotor, structure and the embodiment one of the permanent-magnetic synchronous motor rotor Described rotor structure is essentially identical, will not be repeated here.
Difference part is:As shown in figure 3, the shape of cross section of each radial permanent magnet body is bent arc, further, should Bent arc is an arc knee, and arc knee has a two suite arc-shaped side edges, and one of which is is oppositely arranged and circumferential along rotor Two bent arc-shaped side edges of arrangement, another group is the two bent arc-shaped side edges for being oppositely arranged and being arranged along rotor radial.
Example IV:
Present embodiments provide a kind of permanent-magnetic synchronous motor rotor, structure and the embodiment two of the permanent-magnetic synchronous motor rotor Described rotor structure is essentially identical, will not be repeated here.
Difference part is:It is slightly modified on the basis of the shape of cross section of radial permanent magnet body described in embodiment two, such as Fig. 4 Shown in Fig. 5, the width for the magnetic bridge having between two neighboring tangential permanent magnet body between two folded radial permanent magnet bodies is not Equal, i.e., the width of magnetic bridge is less in the leakage field for ensureing radial permanent magnet body by being tapered on the inside of rotor to rotor outside In the case of further increase the mechanical strength of rotor.
Embodiment five:
A kind of permagnetic synchronous motor is present embodiments provided, the permanent magnetic synchronous motor structure is as shown in fig. 6, it includes stator 4 and embodiment one to example IV it is any as described in permanent-magnetic synchronous motor rotor.The present embodiment not only reduces motor flux leakage, And permanent magnet utilization rate is improved, improve electric efficiency and electric machine structure intensity.
The shape of cross section of radial permanent magnet body described by above example is not limited to above-mentioned shape, can also be other Shape.Radially uniform tangential permanent magnet body number is not limited to 6 on rotor core, can also be other even numbers, preferably greater than Even number equal to 4, particular number can need to be designed according to real work.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's Principle, and limiting the scope of the invention can not be construed in any way.Based on explanation herein, the technology of this area Personnel would not require any inventive effort the other embodiments that can associate the present invention, and these modes are fallen within Within protection scope of the present invention.

Claims (6)

1. a kind of permanent-magnetic synchronous motor rotor, including rotor core (1), it is characterised in that:On the rotor core (1) radially N tangential permanent magnet body (11) of even number is evenly equipped with, the identical polar of the two neighboring tangential permanent magnet body (11) is relative;
One end both sides of each tangential permanent magnet body (11) on the inside of the rotor core (1) are respectively symmetrically arranged with one Radial permanent magnet body (12);
Two folded radial permanent magnet bodies (12) have in face of stator direction between the two neighboring tangential permanent magnet body (11) There is identical polar, and there is magnetic bridge (2) between two radial permanent magnet bodies (12);
The thickness M of the radial permanent magnet body (12) and the thickness S of the tangential permanent magnet body (11) ratio M/S are 0.35-1.5;
There is space between symmetrically arranged two of one end both sides radial permanent magnet body (12) of the tangential permanent magnet body (11) (3), the length L of the space (3) and the thickness S of the tangential permanent magnet body (11) ratio L/S are 0.7-1.5;
Bottom end face and the radial permanent magnet body (12) remote rotor center of the tangential permanent magnet body (11) close to rotor center Outer surface be in contact, and the outer surface part of the bottom end face of the tangential permanent magnet body (11) and the radial permanent magnet body (12) Overlap.
2. permanent-magnetic synchronous motor rotor according to claim 1, it is characterised in that:The radial permanent magnet body (12) it is transversal Face is shaped as plate shaped or arc.
3. permanent-magnetic synchronous motor rotor according to claim 1 or 2, it is characterised in that:The width G of the magnetic bridge (2) Ratio G/M with the thickness M of the radial permanent magnet body (12) is 0.05-0.4.
4. permanent-magnetic synchronous motor rotor according to claim 3, it is characterised in that:The width of the magnetic bridge (2) is by turning Tapered on the outside of sub- inner side to rotor.
5. permanent-magnetic synchronous motor rotor according to claim 1, it is characterised in that:The even number n is the idol more than or equal to 4 Number.
6. a kind of permagnetic synchronous motor, including stator (4), it is characterised in that:Also include as described in claim any one of 1-5 Permanent-magnetic synchronous motor rotor.
CN201410658247.2A 2014-11-18 2014-11-18 A kind of permanent-magnetic synchronous motor rotor and permagnetic synchronous motor Active CN104485762B (en)

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CN104734447A (en) * 2015-04-09 2015-06-24 北京杰诺瑞特机电科技有限公司 Hybrid magnetic circuit permanent magnetic synchronous motor and solid rotor structure thereof
CN105490415A (en) * 2016-01-06 2016-04-13 珠海格力节能环保制冷技术研究中心有限公司 Permanent magnet rotor and permanent magnet motor
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CN105896845A (en) * 2016-05-11 2016-08-24 山东理工大学 Method for producing embedded double-radial and tangential synthetic magnetic field permanent magnet drive motor rotor
CN105978285A (en) * 2016-05-11 2016-09-28 山东理工大学 Hub driving motor with tangential and radial synthesis magnetic field of electromobile
CN105811714A (en) * 2016-05-12 2016-07-27 张学义 Salient pole electromagnetic and built-in combined type permanent magnet hybrid excitation type driving motor for electric automobile
CN105958782A (en) * 2016-05-12 2016-09-21 张学义 Radial-tangential permanent magnet and brushless electromagnetism hybrid excitation driving motor
CN105743247A (en) * 2016-05-12 2016-07-06 张学义 Electric automobile combined-type permanent magnet pole wheel hub driving motor
CN105743252A (en) * 2016-05-12 2016-07-06 张学义 Production method of combined magnetic pole and invisible magnetic pole wheel hub driving motor rotor
CN108599418B (en) * 2018-05-16 2020-05-19 华中科技大学 Rotor core of magnetic circuit series type hybrid permanent magnet controllable flux motor and motor
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Effective date of registration: 20190102

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Patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI

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