CN105591475B

CN105591475B - The rotor of built-in permanent magnet motor constructs

Info

Publication number: CN105591475B
Application number: CN201410662269.6A
Authority: CN
Inventors: 赖明志; 连家祥
Original assignee: Hiwin Mikrosystem Corp
Current assignee: Hiwin Mikrosystem Corp
Priority date: 2014-11-18
Filing date: 2014-11-18
Publication date: 2018-09-07
Anticipated expiration: 2034-11-18
Also published as: CN105591475A

Abstract

The rotor of built-in permanent magnet motor provided by the present invention constructs, it is to have to make radially to bury multiple permanent magnets in iron core memeber, it is it close to one end of the iron core memeber center of curvature, it is located in a corresponding end slot space, make with by the respectively end slot space, to limit the travel zone of the magnetic line of force, the magnetic line of force is set to concentrate and improve magnetic flux density, while increasing counter electromotive force to promote thrust.

Description

The rotor of built-in permanent magnet motor constructs

Technical field

The present invention is related with motor, is constructed especially with regard to a kind of rotor of built-in permanent magnet motor.

Background technology

Permanent magnet motor refers to acting on the mechanical rectifications such as the carbon brush of d.c. motor and commutator to take with semiconductor switch effect The motor in generation is generally called, and type is also set to the surface of rotor in addition to it can give separator according to counter potential waveform with permanent magnet Or the different spaces kenel embedded at internal rotor, divide into surface type, built-in and inline type, wherein surface type permanent magnetism horse Up to being the magnetic flux density that magnet is attached on the surface of rotor, and obtains larger, but since it is for the location technology of magnet It is unsatisfactory, it is easy the disengaging under the running at high speed of rotor, and the technology for making magnet attachment in rotor surface need to be reinforced.

Opposite, the permanent magnet motor of built-in and inline type is then that magnet is embedded in internal rotor, is formed with rotor iron Pericardium encloses the space kenel of magnet, and is suitable for the motion of high speed, and wherein, permanent magnet is buried in the magnetic in rotor Logical concentrated built-in permanent magnet motor, since its magnetic flux is to be added to squeeze out pole-face by the magnet of both sides, only relative to general rotor For single side magnetic flux, this style of motor can even make the magnetic flux density of air gap be more than the flux density of magnet, together When, since the magnetic island region of rotor increases, the inductance difference of d-q axis is expanded, and this style of permanent magnet motor is had Higher reluctance torque is more suitably applied to the speed range of operation of wide area.

Wherein, it is typically the characteristic for having high permeability to bury core material used in the rotor of magnet, with Reduce magnetic circuit on magnetic resistance, but for avoid generate magnet short-cut path the phenomenon that, have then in known technology as shown in Figure 1, enable rotor by Permeability magnetic material is constituted with non-magnet material, and makes, by the regional area 1a made by non-magnet material, to be located at magnet 1b rectangles Long axis end positions on, to avoid generate magnet short-cut path the phenomenon that.

Further, in the known technology of the built-in permanent magnet motor of standard shown in Fig. 2, to make to be convenient for turning in industry The manufacture processing of son, magnet 2a are located in the empty slot 2c of rotor 2b, and the volume of empty slot 2c is made to be more than accommodated magnetic Iron 2a volumes, and make that there is gap 2d between empty slot 2c and rotor 2b radially outer edges, make with by the magnetoresistive tune of this gap 2d The distribution of whole magnetic flux density.

And space is utilized to form the known technologies of reluctance zones, and in addition to disclosed in Fig. 2, also just like disclosed in Fig. 3 and Fig. 4, So that one end of each magnet 3a is abutted there are two shielding space 3b, 3c, or as shown in Figure 5 as, be located at a larger slot 4a Between the one end adjacent magnets 4b.

By Fig. 1 to known technology shown in fig. 5 it is found that either changing rotor shapes with the presence in space, or led with non- Magnetic material constitutes one of rotor, is enterprise by above-mentioned technical controlling magnetic flux density, the magnetic line of force to be made more to concentrate, in order to with Stator winding makees interlinkage more efficiently, while through the limitation to magnetic line of force travel zone, with the person that reduces cogging torque, although Known technology has many similar technologies and has been disclosed for, and waits improved place precisely because still having, it's hard to say this known skill Art has been sound.

Invention content

Therefore, the main object of the present invention is to provide a kind of rotor construction of built-in permanent magnet motor, is that can make magnetic flux Density obtains further increase, and the magnetic line of force is made to concentrate, and the thrust of motor is formed to be promoted.

To reach above-mentioned purpose, the present invention uses following technical scheme:

A kind of rotor construction of built-in permanent magnet motor, it includes：

One iron core memeber has a center of curvature；

Multiple caulking grooves, be angularly radially extended inside respectively each other from the iron core memeber side it is recessed in the iron core memeber On；

Multiple end slots are to be respectively arranged on the iron core memeber to correspond on the respectively position at the caulking groove elongated end end, and respectively correspond to Caulking groove be connected, and make groove width be more than be connected to caulking groove groove width；

Multiple magnetic parts are to be respectively provided with scheduled natural length, respectively in the respectively caulking groove, and long axis one end are made to stretch Enter scheduled built-in length in corresponding end slot；

Wherein, respectively between the component and meet following various：

Formula one：0 b/a≤1/2 ＜；

Formula two：0 ＜ c ＜ e；

Formula three：E=2d+c；

In various, a is the natural length of the respectively magnetic part, and b is the built-in length of the respectively magnetic part, and c is between adjacent two end slot Spacing distance, d be the end slot side cell wall that communicates with each other between the caulking groove side cell wall at a distance from, e is between adjacent two caulking groove Spacing distance.

Further, respectively the depth of the end slot is more than the built-in length of each magnetic part.

Further, the rotor construction of the built-in permanent magnet motor of the invention also includes multiple positioning bodies, respectively It is protrudingly placed on scheduled height on the slot bottom of corresponding end slot.

Respectively the height of the positioning body is the difference of the depth and the built-in length of corresponding end slot.

The long axis another end of each magnetic part of the present invention is submerged in the caulking groove being embedded.

Respectively end slot of the present invention forms the shoulder face of symmetric widths in the caulking groove both sides that are connected to, and makes the respectively shoulder face Width is d.

Description of the drawings

Fig. 1 is the known technology sectional view of different materials composition iron core；

Fig. 2 is the intermarginal known technology sectional view for forming gap outside magnetic part and rotor radial；

Fig. 3 is the intermarginal known technology sectional view for forming gap in magnetic part and rotor radial；

Fig. 4 is the magnetic figure of known technology disclosed in Fig. 3；

Fig. 5 is the intermarginal another known technology sectional view for forming gap in magnetic part and rotor radial；

Fig. 6 is the sectional view of a preferred embodiment of the present invention；

Fig. 7 is the partial enlarged view of a preferred embodiment of the present invention a-quadrant along Fig. 6；

Fig. 8 is the magnetic figure of a preferred embodiment of the present invention；

Fig. 9 is the partial sectional view of another preferred embodiment of the present invention.

Drawing reference numeral：

1a regional area 1b 2a 3a 4b magnet

2b rotor 2c empty slots

The gaps 2d 3b 3c shielding spaces

4a slots

10, the rotor of 10 ' built-in permanent magnet motors constructs 20 iron core memebers

21 internal ring portion, 30 caulking groove

31 40,40 ' end slots of opening

50,50 ' magnetic part

60 ' positioning bodies

Specific implementation mode

First, it please refers to shown in Fig. 6-Fig. 8, the built-in permanent magnet motor provided in a preferred embodiment of the present invention turns Sub- construction, be generally penetrated with known width (spoke) framework built-in permanent magnet motor it is similar, mainly contained One iron core memeber 20, most caulking grooves 30, most end slots 40 and most magnetic parts 50.

The iron core memeber 20 is with made by technology well known to being taken over such as permeability magnetic materials such as silicon steel sheets, except having a center of curvature Outside, and it is extended axially by length appropriate, and it is annular in shape.

Respectively the caulking groove 30 is the straight groove for respectively having appropriate groove width, and respectively by 20 radially outer edge of iron core memeber All side ring surfaces, radially depth appropriate, depth are less than the inside and outside of the iron core memeber 20 inside equiangularly spacedly Distance between diameter enables 20 radially inner edge of iron core memeber still possess the complete internal ring portion 21 of suitable thickness, it is ensured that the traveling of the magnetic line of force, and Make respectively the caulking groove 30 be located at 31 width of opening on 20 radially outer edge week of iron core memeber side ring surface, be less than the size of the groove width.

Respectively the end slot 40 is to be respectively arranged on the internal ring portion 21 of the iron core memeber 20 to be in the strip space of isosceles trapezoid in shape On, and respectively the elongated end end of caulking groove corresponding with one 30 is adjacent and is connected to, and the groove width of the respectively end slot 40 is made to be more than the company of adjoining The groove width of logical caulking groove 30, and the correspondingly-sized between the adjacent end slot 40 being connected to and caulking groove 30 is made to meet aftermentioned specified conditions.

Respectively the magnetic part 50 is the plates for suitable thickness, is respectively provided with an intrinsic length, is respectively to be inserted in a pair In the caulking groove 30 answered, and long axis one end is made to submerge in the opening 31 of plugged caulking groove 30, and is separated by between being open with corresponding caulking groove 30 Spacing appropriate, and, so that the another end of its long axis is stretched into the end slot 40 for abutting connection one from the caulking groove 30 and appropriate stretches into Length.

Wherein, respectively the setting of the end slot 40 should meet it is following various：

Formula one：0 b/a≤1/2 ＜.

Formula two：0 ＜ c ＜ e.

Formula three：E=2d+c.

In various：

A is the natural length of the respectively magnetic part 50.

B is the built-in length of the respectively magnetic part 50.

Spacing distances of the c between adjacent two end slot 40.

D be the 40 side cell wall of end slot that communicates with each other between the 30 side cell wall of caulking groove at a distance from.

Spacing distances of the e between adjacent two caulking groove 30.

By the composition of above-mentioned component, the rotor construction 10 of built-in permanent magnet motor provided by the present invention is by the respectively end Slot 40 forms magnetic resistance appropriate to the magnetic pole of the respectively 50 long axis another end of magnetic part, make with as shown in Figure 8 as, be able to the respectively magnetic part 50 The magnetic line of force concentrate in the limited portions that the iron core memeber 20 corresponds between adjacent both ends slot 40, improved to improve its magnetic flux density Back-emf enables the motor with the built-in permanent magnet motor rotor construction 10 to obtain preferable thrust output.

In addition, since each magnetic part 50 is to be subject to respectively 30 institute of caulking groove by the respectively sandwiched positioning of 30 institutes of caulking groove being embedded The smaller opening having more is able to when rotor operates, avoid respectively the magnetic part 50 deviate from because of centrifugal force, certainly, if for obtain It is further to stablize immobilization efficiencies, fill up empty in the respectively end slot 40 through the known anchor technology of the non-magnet materials such as epoxy resin Between be open in 31 spaces with each caulking groove 30, to obtain more preferably immobilization efficiencies person.

It is that need to ensure that respectively the 50 long axis another end of magnetic part stretches into corresponding end slot furthermore due to reaching for primary efficacy of the present invention The presence of 40 kenels of space in space, therefore to enable this manufacture group that is formed in load onto easy to implement, the sheet as shown in the 9th figure It is that built-in permanent magnet motor rotor constructs 10 ' persons to invent provided in another preferred embodiment, for preceding taking off embodiment, It is further including multiple positioning bodies 60 ' being protrudingly placed on respectively in 40 ' groove bottom wall of corresponding end slot, and make each positioning body 60 ' Height and the difference of the depth of corresponding end slot 40 ' and the built-in length, make according to this respectively the magnetic part 50 ' be inserted in corresponding caulking groove 30 Border must be such that long axis another end is resisted against on 60 ' top of corresponding positioning body, to be positioned, the assembling of the respectively magnetic part 50 ' be made to be convenient for It carries out.

Claims

1. a kind of rotor of built-in permanent magnet motor constructs, it is characterised in that：It includes：

One iron core memeber has a center of curvature；

Most caulking grooves, be angularly radially extended inside respectively each other from the iron core memeber side it is recessed on the iron core memeber；

Most end slots are to be respectively arranged on the iron core memeber to correspond on the respectively position at the caulking groove elongated end end,

And respectively the end slot is to be connected with corresponding caulking groove, and groove width is made to be more than be connected to caulking groove groove width；

Most magnetic parts are to be respectively provided with scheduled natural length, respectively in each caulking groove, and long axis one end are made to stretch into pair Answer scheduled built-in length in end slot, and long axis another end submerges scheduled depth in be embedded caulking groove, make respectively end slot cladding it is each One end of the magnetic part；

Wherein, respectively between the component and meet following various：

Formula one：0 b/a≤1/2 ＜；

Formula two：0 ＜ c ＜ e；

Formula three：E=2d+c；

In various, a is the natural length of the respectively magnetic part, and b is the built-in length of the respectively magnetic part, intervals of the c between adjacent two end slot Distance, d be the end slot side cell wall that communicates with each other between the caulking groove side cell wall at a distance from, between e is between adjacent two caulking groove Gauge from.

2. the rotor of built-in permanent magnet motor according to claim 1 constructs, it is characterised in that：The depth of each end slot More than the built-in length of the respectively magnetic part.

3. the rotor of built-in permanent magnet motor according to claim 1 constructs, it is characterised in that：Most positioning are further included Body is protrudingly placed on scheduled height on the slot bottom of corresponding end slot respectively.

4. the rotor of built-in permanent magnet motor according to claim 3 constructs, it is characterised in that：The height of each positioning body Degree is the difference of the depth and the built-in length of corresponding end slot.

5. the rotor of built-in permanent magnet motor according to claim 1 constructs, which is characterized in that each end slot is in connecting Logical caulking groove both sides form the shoulder face of symmetric widths, and the width in each shoulder face is made to be the d.