CN104205574B - The rotor of electric rotating machine - Google Patents

Abstract

At the outer circumferential side of the length direction end (21) of permanent magnet (12), the space group (23) being made up of the multiple spaces (22) being formed in rotor core (11) possesses Second gap row (32) of the outer circumferential side of the first space (22a) and the first space (22a).When observing from the direction vertical relative to the outer peripheral face of permanent magnet (12) (24), the end (41) of the both sides of the first space (22a) is the most overlapping with the adjacent pair Second gap (22b) of Second gap row (32) difference on the direction along the outer peripheral face (24) of permanent magnet (12).Being formed with rib (55) between the adjacent pair Second gap (22b, 22b) of Second gap row (32), the imaginary line (60) extended along the central authorities of width of rib (55) is by the first space (22a).

Description

The rotor of electric rotating machine

Technical field

The present invention relates on electric motor vehicle, hybrid motor vehicle etc. carry electric rotating machine turn Son.

Background technology

At present, in vehicle traction electric rotating machine, in order to obtain high coercive force characteristic, employ relatively How the neodium magnet containing rare earth elements such as dysprosiums (Dy) at high price.But, along with terres rares The price of element is surging, even if needing one reduce Dy or do not have Dy also to be able to suppress demagnetization resistance to The high performance electric rotating machine that power is impaired.

Such as, in patent documentation 1, it is contemplated that be embedded with multiple permanent magnet in rotor core In the rotor of IPM motor, improve the scheme of the demagnetization endurance burying Magnet underground.As shown in figure 11, The revolving part 100 of this electric rotating machine will be configured to substantially V-shape multipair permanent magnet 117A, 117B is contained in permanent magnet resettlement section 119A, the 119B at both ends with space 120A, 120B In.Magnetic pole strength 170A near pole end piece 172A, 172B of permanent magnet 117A, 117B, Between the outer peripheral face 162 of 170B and rotor core 160, multiple slit 121A, 122A, 123A And 121B, 122B, 123B be substantially orthogonal with magnetic pole strength 170A, 170B respectively and in parallel to each other Configuration.Slit 121A, 122A, 123A and 121B, 122B, 123B radical length along with From the center side of magnetic pole strength 170A, 170B of permanent magnet 117A, 117B towards pole end piece 172A, 172B and progressively longer.This slit 121A, 122A, 123A and 121B, 122B, 123B for the magnetic flux out of the center side from magnetic pole strength 170A, 170B towards pole end piece 172A, The situation at the position between the outer peripheral face 162 of 172B and rotor core suppresses, thus, and suppression Magnetic saturation near pole end piece 172A of permanent magnet 117A, 117B, 172B and realize demagnetization The raising of endurance.

It addition, in the rotor that patent documentation 2 is recorded, outside the rotor of the permanent magnet of rectangular shape Week, length direction neighboring, side both ends were provided with single space as the formation stoping magnetic flux short circuit The anti-locking mechanism of short circuit, increases the magnetic resistance at Magnet both ends and prevents between the end of adjacent permanent magnet The short circuit of magnetic flux such that it is able to effectively utilize Magnet torque.

Citation

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2011-199947 publication (the 2nd figure)

Patent documentation 2: No. 3487667 publications of Japanese Patent No. (the 3rd figure)

The problem that invention is to be solved

But, when the operating of electric rotating machine, according to the size of the electric current to the coil electricity of stator, Advance angle, the anglec of rotation of rotor, the magnetic structure etc. of rotor, and the demagnetizing field of stator is from various sides To acting on rotor.In the electric rotating machine that patent documentation 1 is recorded, although in view of for from magnetic pole The center side of face 170A, 170B magnetic flux out is towards pole end piece 172A, 172B and rotor ferrum The situation at the position between the outer peripheral face 162 of the heart carries out suppressing this point to be designed, but due to From direction effect vertical for magnetic pole strength 170A, the 170B relative to permanent magnet 117A, 117B The demagnetizing field of stator directly acts on permanent magnet 117A, 117B, therefore permanent magnet 117A, 117B easily demagnetizes.And, in order to produce big reluctance torque, the salient pole of Lq Yu Ld is poor (Lq-Ld) Important, generally, make the low magnetic resistance of LqIq magnetic circuit, and make LdId magnetic circuit height magnetic resistance, thus Increase salient pole difference and effectively produce reluctance torque.But, the electric rotating machine of patent documentation 1 is at LqIq Configure slit 121A, 122A, 123A and 121B on magnetic circuit, 122B, 123B and magnetic resistance raise, LdId magnetic circuit configures abreast with magnetic circuit slit 121A, 122A, 123A and 121B, 122B, 123B and magnetic resistance reduce.Accordingly, it is difficult to it is poor to produce salient pole, result is that reluctance torque reduces.

It addition, in the rotor that patent documentation 2 is recorded, be the technology for preventing magnetic flux short circuit, and And do not record resistance to demagnetization characteristic.

Summary of the invention

The present invention proposes in view of aforesaid problem, its object is to provide one to make to act on permanent magnetic The demagnetizing field of ferrum is disperseed, is reduced and can improve the rotor of the electric rotating machine of resistance to demagnetization characteristic.

For solving the means of problem

To achieve these goals, the first scheme of the present invention relates to the rotor (example of a kind of electric rotating machine As, the rotor 10 in embodiment described later), it possesses:

Rotor core (such as, the rotor core 11 in embodiment described later), it is formed with magnetic Ferrum inserts hole (such as, the magnet insertion holes 13 in embodiment described later)；And

Permanent magnet (such as, the permanent magnet 12 in embodiment described later), it is to described magnetic Ferrum inserts hole and inserts,

The rotor of described electric rotating machine is characterised by,

(such as, the end in embodiment described later, length direction end at described permanent magnet 21) outer circumferential side is formed by multiple spaces (such as, the space 22 in embodiment described later) The space group (such as, the space group 23 in embodiment described later) constituted,

Described space group possesses:

First space (such as, the first space 22a in embodiment described later)；And

Second gap row (such as, the Second gap row 32 in embodiment described later), its than The position of described first outer circumferential side side, space, by multiple Second gaps (such as, embodiment described later In Second gap 22b) at a specific interval (such as, spacing P2 in embodiment described later) Formed,

It is formed with rib (such as, between Second gap described in the adjacent pair that described Second gap arranges Rib 55 in embodiment described later),

(such as, described later at the imaginary line extended from the central authorities with the width along described rib Imaginary line 60 in embodiment) parallel direction is when observing, described first space along described On the direction of the outer peripheral face (such as, the outer peripheral face 24 in embodiment described later) of permanent magnet The end (such as, the end 41 in embodiment described later) of both sides is relative to described Second gap Described in the adjacent pair of row, Second gap is in the direction of the described outer peripheral face along described permanent magnet Upper overlap respectively,

The described imaginary line extended along the central authorities of width of described rib is empty by described first Gap at least some of,

The magnetic pole center side end of described space group from the outer peripheral face of described permanent magnet towards described turn The outer peripheral face extension that son is unshakable in one's determination.

The alternative plan of the present invention is based on the structure of first scheme, it is characterised in that

Described space group possess by multiple described first spaces along described permanent magnet outer peripheral face with The first space row (such as, the first space row in embodiment described later that the spacing of regulation is formed 31)。

The third program of the present invention is based on the structure of alternative plan, it is characterised in that

At the first imaginary line (such as, the first imaginary line 35 in embodiment described later) and second When the angle of imaginary line (such as, the second imaginary line 36 in embodiment described later) is θ, θ ＜ 90 °, This first imaginary line is by center (such as, the enforcement described later of the side in adjacent pair the first space Center O1 in mode) with the center of described Second gap (such as, in embodiment described later Center O3) link, this second imaginary line is by the center (example of the opposing party in the pair of first space As, the center O2 in embodiment described later) and the central link of described Second gap.

The fourth program of the present invention is in the first to third program based on the structure of either a program, and it is special Levy and be,

Described space is formed as round-shaped when from end on observation.

5th scheme of the present invention is in the first to third program based on the structure of either a program, and it is special Levy and be,

Described space is formed as polygonal shape (such as, embodiment described later when from end on observation In square space 62, rhombus space 63, regular hexagon space 64).

6th scheme of the present invention is based on the structure of the 5th scheme, it is characterised in that

Described space is shaped generally as regular hexagon shape when from end on observation.

7th scheme of the present invention is in the first to the 6th scheme based on the structure of either a program, and it is special Levy and be,

Described each space row in the end being positioned at magnetic pole center side described space according to from described forever What for a long time the outer peripheral face of Magnet arranged towards the described space of the outer peripheral face of described rotor core is arranged in order Pole end piece side.

The eighth aspect of the present invention is in the second to the 7th scheme based on the structure of either a program, and it is special Levy and be,

Described space group compared with the circumferencial direction end of the outer peripheral face of described permanent magnet by along The outer peripheral face side of the described rotor core on the direction of the outer peripheral face of this permanent magnet is formed.

9th scheme of the present invention relates to rotor (such as, the embodiment described later of a kind of electric rotating machine In rotor 10), it possesses:

Rotor core (such as, the rotor core 11 in embodiment described later), it is formed with magnetic Ferrum inserts hole (such as, the magnet insertion holes 13 in embodiment described later)；And

Permanent magnet (such as, the permanent magnet 12 in embodiment described later), it is to described magnetic Ferrum inserts hole and inserts,

The rotor of described electric rotating machine is characterised by,

(such as, the end in embodiment described later, length direction end at described permanent magnet 21) outer circumferential side is formed by multiple spaces (such as, the space 22 in embodiment described later) The space group (such as, the space group 23 in embodiment described later) constituted,

Described space group possesses:

First space row (such as, the first space row 31 in embodiment described later), its from During end on observation, by multiple first spaces (such as, the first space 22a in embodiment described later) Along the outer peripheral face of described permanent magnet at a specific interval (between such as, in embodiment described later Away from P1) formed；And

Second gap (such as, the Second gap 22b in embodiment described later), it is described at ratio The position in the first row outer circumferential side side, space, is formed between adjacent pair the first space,

It is formed with rib (such as, between a side and described Second gap in the pair of first space Rib 57 in embodiment described later),

Imaginary line (such as, the embodiment party described later extended along the central authorities of width of described rib Imaginary line 46 in formula) by the opposing party in the pair of first space,

The magnetic pole center side end of described space group from the outer peripheral face of described permanent magnet towards described turn The outer peripheral face extension that son is unshakable in one's determination.

Tenth scheme of the present invention relates to rotor (such as, the embodiment described later of a kind of electric rotating machine In rotor 10), it possesses:

Rotor core (such as, the rotor core 11 in embodiment described later), it is formed with magnetic Ferrum inserts hole (such as, the magnet insertion holes 13 in embodiment described later)；And

Permanent magnet (such as, the permanent magnet 12 in embodiment described later), it is to described magnetic Ferrum inserts hole and inserts,

The rotor of described electric rotating machine is characterised by,

(such as, the end in embodiment described later, length direction end at described permanent magnet 21) outer circumferential side is formed by multiple spaces (such as, the space 22 in embodiment described later) The space group (such as, the space group 23 in embodiment described later) constituted,

Described space group possesses:

First space row (such as, the first space row 31 in embodiment described later), its from During end on observation, by multiple first spaces (such as, the first space 22a in embodiment described later) Outer peripheral face along described permanent magnet is formed with the first spacing；

Second gap row (such as, the Second gap row 32 in embodiment described later), its than The position of described first row outer circumferential side side, space, by multiple Second gaps (such as, embodiment party described later Second gap 22b in formula) formed along the described outer peripheral face of described permanent magnet with the second spacing； And

3rd space (such as, the 3rd space 22c in embodiment described later), it is described at ratio The position of Second gap row outer circumferential side side, is formed between adjacent pair Second gap,

It is formed with rib (such as, between a side and described 3rd space in the pair of Second gap Rib 71 in embodiment described later),

Imaginary line (such as, the embodiment party described later extended along the central authorities of width of described rib Imaginary line 72 in formula) by described first space,

The magnetic pole center side end of described space group from the outer peripheral face of described permanent magnet towards described turn The outer peripheral face extension that son is unshakable in one's determination.

Invention effect

According to the first scheme of the present invention, when the operating of electric rotating machine, even if in demagnetizing field from various In the case of direction acts on the outer peripheral face of permanent magnet, it is also possible to suppression demagnetizing field concentrates on permanent magnetic The situation at the specific position of the end of ferrum, it is possible to the specific position of the end of suppression permanent magnet Demagnetization.

Alternative plan according to the present invention, it is possible to more effectively make demagnetizing field to outside permanent magnet The direction dispersion of side face.

According to the third program of the present invention, the opposing party in a pair first spaces is positioned at the degaussing by rib On the path of field, this rib is formed between a side and the Second gap in a pair first spaces.Therefore, Even if demagnetizing field is prolonged along the rib formed between a side and the Second gap in a pair first spaces In the case of stretching setting direction effect, it is also possible to suppression directly acts on the feelings of the end of permanent magnet Condition, it is possible to make the demagnetizing field acting on the end of permanent magnet to the side of the outer peripheral face along permanent magnet Demagnetization is suppressed to dispersion effectively.

Fourth program according to the present invention, it is possible to suppression shape on the local of the rib being formed between space Become the situation in corner (kink), when rotor rotates, it is possible to make to act on the centrifugal of rotor core The stress of power disperses to rib entirety, it is possible to more effectively suppress the reduction of the intensity of rotor core.

The the 5th and the 6th scheme according to the present invention, it is possible to make the space in space row each other Rib and adjacent space row in the even thickness of space rib each other, it is possible to suppression rib The reduction of the intensity of locality.It is accordingly possible to ensure the size in space, and suppress the intensity of rib simultaneously Reduction.

The 7th scheme according to the present invention, it is possible to effectively suppress the magnetic pole center side court from permanent magnet Magnetic flux to side, magnetic pole outer end.

According to the eighth aspect of the present invention, act on a part for the demagnetizing field of the outer peripheral face of permanent magnet Under the effect of space rib each other, additionally it is possible to the circumferencial direction with the outer peripheral face of permanent magnet End is compared and is disperseed by the outer peripheral face side along the rotor core on the direction of the outer peripheral face of permanent magnet, Therefore, it is possible to more effectively suppress the specific position of the end of permanent magnet that the situation of demagnetization occurs.

The 9th scheme according to the present invention, the opposing party in a pair first spaces is positioned at and passes through along rib On the path of the demagnetizing field of rib.Therefore, in addition to the effect as first scheme, even if going Magnetic field along rib extended direction act in the case of, it is also possible to suppression directly act on permanent magnetic The situation of the end of ferrum, it is possible to effectively disperse to the direction of the outer peripheral face along permanent magnet.

The tenth scheme according to the present invention, the first space is positioned at the road along rib by the demagnetizing field of rib On footpath.Therefore, in addition to the effect as first scheme, even if demagnetizing field prolonging along rib In the case of stretching setting direction effect, also can suppress to directly act on the situation of the end of permanent magnet, Effectively can disperse to the direction of the outer peripheral face along permanent magnet.

Accompanying drawing explanation

Fig. 1 is the front view of the rotor of first embodiment of the present invention.

Fig. 2 is the partial enlarged drawing in Fig. 1.

Fig. 3 (a) is putting of the part surrounded by A of Fig. 2 of the configuration relation for space is described Big figure, Fig. 3 (b) is the portion surrounded by A of the Fig. 2 of the rib being formed between space for explanation The enlarged drawing divided.

Fig. 4 (a) is the partial enlarged drawing of conventional rotor, and Fig. 4 (b) is the first embodiment The partial enlarged drawing of rotor, Fig. 4 (c) is by the demagnetization system of conventional rotor Yu the rotor of the present invention The curve chart that number compares and illustrates.

Fig. 5 is putting of the part surrounded by A of Fig. 2 of another configuration relation for space is described Big figure.

Fig. 6 is the partial enlarged drawing of the rotor of second embodiment of the present invention.

Fig. 7 is being surrounded by B of Fig. 6 of the configuration relation in the space for the second embodiment is described The enlarged drawing of part.

Fig. 8 (a) is the partial enlarged drawing of the rotor of the 3rd embodiment, and Fig. 8 (b) is the 3rd reality Execute the partial enlarged drawing of the rotor of the variation of mode.

Fig. 9 (a) is the partial enlarged drawing of the rotor of the 4th embodiment of the present invention, Fig. 9 (b) Being the partial enlarged drawing of the rotor of the variation of the 4th embodiment, Fig. 9 (c) is the 4th embodiment party The partial enlarged drawing of the rotor of another variation of formula.

Figure 10 is the enlarged drawing of the configuration relation in the space for explanatory diagram 9 (a).

Figure 11 is the partial enlarged drawing of conventional rotor.

Detailed description of the invention

Hereinafter, based on accompanying drawing, explain the embodiments of the present invention.It should be noted that Accompanying drawing is to carry out observing along the direction of symbol.

(the first embodiment)

As it is shown in figure 1, the rotor 10 of the electric rotating machine of present embodiment separates gap and can rotate Be arranged in the inner side of not shown stator.Rotor 10 possesses: by the discoideus electricity of same shape The rotor core 11 that magnetic steel plate stacking is multiple and is formed；Use packing material and in rotor core 11 Multiple permanent magnets 12 that multiple magnet insertion holes 13 of upper setting are imbedded respectively.

Multiple magnet insertion holes 13 make to be formed in the way of the peripheral direction towards rotor core 11 is opened Every a pair magnet insertion holes 13 for substantially V shape is formed at a prescribed interval, each permanent magnet 12 Make every a pair magnet insertion holes 13 change magnetic pole towards and be inserted respectively into each magnet insertion holes 13 In.Such as, when the outer circumferential side in 2 permanent magnet 12a is N pole, adjacent 2 are permanent Outer circumferential side in Magnet 12b is S pole.

Also referring to Fig. 2, close at the outer peripheral face 15 with rotor core 11 of magnet insertion holes 13 The end of side, is formed with space 17 continuously with magnet insertion holes 13.It addition, with rotor ferrum The end of the side that the inner peripheral surface 16 of the heart 11 is close, is also formed continuously with magnet insertion holes 13 Space 18.Therefore, when having imbedded permanent magnet 12 to magnet insertion holes 13, forever The both ends of Magnet 12 are provided with the space 17,18 that magnetic flux short circuit prevents for a long time.

Outer circumferential side in the length direction outer end 21 (21a, 21b) of permanent magnet 12 be formed by Be formed as the space group 23 that round-shaped multiple spaces 22 are constituted.Space group 23 includes: along The outer peripheral face 24 of permanent magnet 12 multiple first space 22a P1 at a specific interval are formed the One space row 31；Than the first space row 31 outer circumferential side side position by multiple Second gap 22b with The Second gap row 32 that spacing P2 of regulation is formed；In the position than Second gap row 32 outer circumferential side side Put the 3rd space row 33 formed by multiple 3rd space 22c P3 at a specific interval；And be positioned at On the extended line of the outer circumferential side of the outer peripheral face 24 of permanent magnet 12, and the outer circumferential side in space 17 with Space, the side row 34 that the spacing of regulation is formed.It should be noted that space group 23 can be by first Space row 31 and Second gap row 32 are constituted, it is also possible to than the 3rd space row 33 outer circumferential side side Position is also equipped with the 4th space row.

It addition, the magnetic pole center side end of space group 23 from the outer peripheral face 24 of permanent magnet 12 towards The outer peripheral face 15 of rotor core 11 extends.Especially first, second, third space row 31,32, Space 22a, 22b, 22c of being positioned at magnetic pole center side end of 33 are along with outside permanent magnet 12 Side face 24 is arranged in 21a, 21b side, magnetic pole outer end towards the outer peripheral face 15 of rotor core 11.

Here, as shown in Fig. 3 (a), in space group 23, the first imaginary line 35 and second is false Thinking that the angle, θ of line 36 is set smaller than 90 ° (θ ＜ 90 °), this first imaginary line 35 is by adjacent The center O1 of the side in a pair first space 22a with at the outer peripheral face 24 along permanent magnet 12 Direction on the center O3 of Second gap 22b between a pair first space 22a link, should Second imaginary line 36 is by the center O2 and Second gap 22b of the opposing party in a pair first space 22a Center O3 link.And, the 3rd imaginary line 37 also sets with the angle ψ of the 4th imaginary line 38 For less than 90 ° (ψ ＜ 90 °), the 3rd imaginary line 37 is by adjacent pair Second gap 22b The center O3 of one side with on the direction along the outer peripheral face 24 of permanent magnet 12, be positioned at a pair second The center O5 of the 3rd space 22c between the 22b of space links, and the 4th imaginary line 38 is by a pair The center O5 of the center O4 and the 3rd space 22c of the opposing party in Second gap 22b links.Need It is noted that in Fig. 3 (a), the first imaginary line 35 and the 3rd imaginary line 37 are expressed as Same straight line but it also may constitute different straight lines.

It addition, as shown in Fig. 3 (a), vertical from the outer peripheral face 24 relative to permanent magnet 12 (imaginary line 60 extended with the central authorities of the width along rib 55 described later is parallel in direction Direction) when observing, the first space 22a along on the direction of the outer peripheral face 24 of permanent magnet 12 The end 41 of both sides relative to the adjacent pair Second gap 22b of Second gap row 32 along forever The most overlapping on the direction of the outer peripheral face 24 of Magnet 12 for a long time.

It addition, along shape between adjacent pair Second gap 22b, 22b of Second gap row 32 The central authorities of width of the rib 55 become and the imaginary line 60 that extends are by the first space 22a at least A part.It should be noted that be round-shaped situation in space 22 as the present embodiment Under, may be prescribed as the first space 22a remains at least partially within the adjacent of Second gap row 32 At a pair the most immediate position of Second gap 22b 44, by adjacent pair Second gap 22b The region 43 that clips of respective tangent line 42,42 in.

Thus, as shown in Fig. 3 (b), at adjacent pair Second gap 22b each other, one To the side in Second gap 22b and between the first space 22a and a pair Second gap 22b In the opposing party and the first space 22a between be respectively formed with rib 55,56,57, thus be formed at At least 3 ribs 55,56,57 linked at branch.In 3 ribs 55,56,57, in rotation During the operating of rotating motor, according to the size advance angle of the electric current to the coil electricity of stator, rotor The anglec of rotation, the magnetic structure etc. of rotor, act on the end of permanent magnet from various directions and have degaussing ?.But, appointing in the demagnetizing field from the effect of the direction of regulation is by 3 ribs 55,56,57 One rib and towards in the case of permanent magnet 12, at branch to other 2 Ge Lei branches and Act on permanent magnet 12.Thus, the demagnetizing field of end 21 of permanent magnet 12 is acted on to edge The direction dispersion of the outer peripheral face 24 of permanent magnet 12, therefore when the operating of electric rotating machine, even if In the case of having demagnetizing field from the effect of various directions, it is also possible to suppression demagnetizing field concentrates on permanent magnet The situation at the specific position of the end 21 of 12 such that it is able to suppress the demagnetization at specific position.

It is additionally, since between the first space 22a and a pair Second gap 22b at least formed with 3 Individual rib 55,56,57, therefore compared with the situation in the past forming single space like that, it is possible to press down The reduction of the intensity of rotor core processed.And, the rib formed between each space arranges also serves as q axle side To magnetic circuit (LqIq magnetic circuit) function, therefore magnetic flux on q direction of principal axis easily by, q Axial inductance (Lq) increases.Therefore, it is possible to increase saliency (Lq-Ld), it is possible to effectively Real estate magnetisation resistive torque.

It addition, adjacent pair the 3rd space 22c of Second gap 22b and the 3rd space row 33 Position relationship is also at the adjacent pair with the first above-mentioned space 22a and Second gap row 32 the The position relationship that the position relationship of two space 22b is same.

That is, as shown in Fig. 3 (b), vertical from the outer peripheral face 24 relative to permanent magnet 12 Direction observe time, Second gap 22b along two on the direction of the outer peripheral face 24 of permanent magnet 12 The end 95 of side relative to adjacent pair the 3rd space 22c of the 3rd space row 33 along forever Difference overlap on the direction of the outer peripheral face 24 of Magnet 12.And, along at the 3rd space row 33 The central authorities of width of the rib 96 formed between adjacent pair the 3rd space 22c, 22c and extend At least some of by Second gap 22b of imaginary line 97.

Fig. 4 (c) is to use the conventional rotor shown in Fig. 4 (a) and this reality shown in Fig. 4 (b) The rotor (b) executing mode carrys out each demagnetizing factor of comparison and the curve chart that illustrates, it is known that by forever The outer circumferential side of the end 21 (21a, 21b) of the circumferencial direction of Magnet 12 configures by multiple spaces 22 The space group 23 constituted, thus demagnetizing field is disperseed and reduces, and resistance to demagnetization characteristic is greatly improved.Need It is noted that although it is not shown, still pass through suitably to adjust the allocation position in space, additionally it is possible to control The position of the demagnetization of permanent magnet 12 processed, thus to fitting that the rotor of the Magnet of low coercive force is suitable for Extend by property.

As described above, according to the rotor 10 of present embodiment, by the circle at permanent magnet 12 The space group 23 that multiple spaces 22 that the outer circumferential side of the end 21 of circumferential direction is formed are constituted possesses first Space 22a and the Second gap row formed at the outer circumferential side P2 at a specific interval of the first space 22a 32, between adjacent pair Second gap 22b, 22b of Second gap row 32, it is formed with rib 55, The direction parallel at the imaginary line 60 extended from the central authorities with the width along rib 55 is observed Time, the end along the both sides on the direction of the outer peripheral face 24 of permanent magnet 12 of the first space 22a 41 relative to the adjacent pair Second gap 22b of Second gap row 32 along permanent magnet 12 Outer peripheral face 24 direction on respectively overlap, the vacation extended along the central authorities of width of rib 55 Think that line 60 passes through at least some of of the first space 22a.Thus, from the periphery with permanent magnet 12 The demagnetizing field of the direction effect that face 24 is vertical walks around Second gap 22b or the first space 22a, in shape After becoming at the rib 55,56,57 between space 22a, 22b branch and passing through, act on permanent magnetic The end 21 of ferrum 12.Therefore, it is possible to suppression is from the side vertical with the outer peripheral face 24 of permanent magnet 12 Demagnetizing field to effect directly acts on the situation of the end 21 of permanent magnet 12 such that it is able to suppression Permanent magnet is made because of the demagnetizing field from the direction effect vertical with the outer peripheral face 24 of permanent magnet 12 There is the situation of demagnetization in the end 21 of 12.

It addition, space group 23 possesses multiple first space 22a along the outer peripheral face of permanent magnet 12 24 at a specific interval p1 formed the first space row 31, therefore, it is possible to more effectively make demagnetizing field to Direction dispersion along the outer peripheral face 24 of permanent magnet 12.

It addition, the angle, θ of the first imaginary line 35 and the second imaginary line 36 is θ ＜ 90 °, this first vacation Think the line 35 center O1 by the first space 22a of the side in the 22a of adjacent pair the first space Linking with the center O3 of Second gap 22b, this second imaginary line 36 is by first space of the opposing party The center O3 of the center O2 and Second gap 22b of 22a links, and therefore, the first of the opposing party is empty Gap 22a is positioned on the path of the demagnetizing field by rib 57, and this rib 57 is formed at a pair first spaces Between first space 22a and the Second gap 22b of the side in 22a.Therefore, though demagnetizing field edge And formed between the first space 22a and the Second gap 22b of the side in a pair first space 22a The extended direction effect of rib 57, it is also possible to make to act on the end 21 of permanent magnet 12 Demagnetizing field suppresses moving back of specific position to the dispersion of the direction of the outer peripheral face along permanent magnet 12 Magnetic.

And, space 22 is owing to being formed as round-shaped when from end on observation, therefore, it is possible to suppression The situation of corner (kink) it is formed with, at rotor on the local of the rib formed between space 22 During 10 rotation, it is possible to make the stress acting on the centrifugal force of rotor core 11 disperse to rib entirety, from And can more effectively suppress the reduction of the intensity of rotor core 11.

Additionally, the space 22a of the end being positioned at magnetic pole center side in space row 31,32,33, 22b, 22c according to from the outer peripheral face 24 of permanent magnet 12 towards the outer peripheral face 15 of rotor core 11 Space row 31,32,33 be arranged in order in 21a, 21b side, magnetic pole outer end, therefore, it is possible to have Effect ground suppresses from the magnetic pole center side of permanent magnet 12 towards the magnetic flux of 21a, 21b side, magnetic pole outer end.

Further, since according to from the outer peripheral face 24 of permanent magnet 12 towards the periphery of rotor core 11 The space row 31,32,33 in face 15 be arranged in order in 21a, 21b side, magnetic pole outer end, therefore It is easy to ensure that LqIq magnetic circuit (with reference to Fig. 4 (b)), and the axial inductance of q (Lq) is made to increase. Therefore, it is possible to increase saliency (Lq-Ld), it is possible to effectively produce reluctance torque.

Additionally, space group 23 with the circumferencial direction end 21a of the outer peripheral face 24 of permanent magnet 12, 21b compares by the periphery along the rotor core 11 on the direction of the outer peripheral face 24 of permanent magnet 12 Side, face 15 is formed, and a part for the demagnetizing field therefore acting on the outer peripheral face 24 of permanent magnet 12 exists Under the effect of space 22 rib each other, also to the circumference with the outer peripheral face 24 of permanent magnet 12 End, direction 21a, 21b compare by along the rotor on the direction of the outer peripheral face 24 of permanent magnet 12 The outer peripheral face 15 side dispersion of unshakable in one's determination 11, therefore, it is possible to more effectively suppress the end of permanent magnet 12 Specific position occur demagnetization situation.It should be noted that in the present embodiment, first, Second and space, side row 31,32,34 comprise space 22 in this position.

It should be noted that present embodiment can also as shown in Figure 5 void configuration close System.That is, rib is formed between the side in a pair first spaces 22a, 22a and Second gap 22b 57, the imaginary line 46 extended along the central authorities of width of this rib 57 is by a pair first spaces The opposing party in 22a, 22a.Thus, the opposing party in a pair first space 22a is positioned at along rib 57 and by the path of the demagnetizing field of rib 57.Therefore, even if demagnetizing field prolonging along rib 57 In the case of stretching setting direction effect, it is also possible to the direction of the outer peripheral face 24 along permanent magnet 12 Effectively disperse such that it is able to suppression directly acts on the demagnetizing field of the end 21 of permanent magnet 12.

It should be noted that in space 22 by shaped form as round-shaped or elliptical shape etc. In the case of one-tenth, it is also possible at least the one of the opposing party being defined as in the 22a of adjacent pair the first space The side that part is positioned in the 22a of adjacent pair the first space and the immediate position of Second gap 22b Respective tangent line 48 at 47, by the side in the first space 22a and Second gap 22b clips Region 49 in, thus play effect similar to the above.

(the second embodiment)

Fig. 6 is the partial enlarged drawing of the rotor of second embodiment of the present invention, and Fig. 7 is for illustrating The partial enlarged drawing of the configuration relation in space.

As shown in Figure 6, in space group 23, the first imaginary line 35a's and the second imaginary line 36a Angle, θ is set greater than 90 ° (θ ＞ 90 °), and this first imaginary line 35a is by adjacent pair first The center O3 of the center O1 and Second gap 22b of the side in the 22a of space links, this second vacation Think that line 36a is by the center O2 and Second gap 22b of the opposing party in a pair first space 22a Heart O3 links.And, the angle ψ of the 3rd imaginary line 37a and the 4th imaginary line 38a is also set to More than 90 ° (ψ ＞ 90 °), the 3rd imaginary line 37a is by adjacent pair Second gap 22b The center O5 of the center O3 and the 3rd space 22c of one side links, and the 4th imaginary line 38a is by one The center O5 of the center O4 and the 3rd space 22c of the opposing party in Second gap 22b is linked. It should be noted that in figure 6, the first imaginary line 35a and the 3rd imaginary line 37a is expressed as same One straight line but it also may constitute different straight lines.

As it is shown in fig. 7, at angle, θ, ψ more than 90 ° in the space group 23 that arranges, at a pair the Rib 71 is formed, along the width side of rib 71 between a side and the 3rd space 22c in two space 22b To central authorities and the imaginary line 72 that extends by the first space 22a.Thus, the first 22a position, space On the path of demagnetizing field passing through rib 71 along rib 71.Therefore, even if in demagnetizing field along rib In the case of the extended direction effect of 71, also can suppress to directly act on the end of permanent magnet 12 The situation in portion 21, it is possible to make the demagnetizing field acting on the end 21 of permanent magnet 12 to along forever The direction of the outer peripheral face 24 of Magnet 12 disperses effectively.

It addition, in this embodiment, space group 23 is also at the outer peripheral face with permanent magnet 12 The circumferencial direction end 21 of 24 is compared by along turning on the direction of the outer peripheral face 24 of permanent magnet 12 Outer peripheral face 15 side of son unshakable in one's determination 11 is formed, therefore by space 22 in this position each other Rib, it is possible to make to act on the part dispersion of the demagnetizing field of the outer peripheral face 24 of permanent magnet 12.

About other structure and effect, as the rotor 10 of the first embodiment.

It should be noted that the above-mentioned regulation of present embodiment is as the 4th embodiment described later It also is able to be suitable in the case of the space group being made up of polygonal shape space.

It addition, in the present embodiment, in space 22 as round-shaped or elliptical shape etc. In the case of being formed by curve, it is also possible to be defined as remaining at least partially within of the first space 22a adjacent A pair Second gap 22b in a side and the 3rd immediate position of space 22c 73 at, by The region 75 that a side in Second gap 22b and the respective tangent line 74 of the 3rd space 22c clip In, thus play effect similar to the above.

(the 3rd embodiment)

Fig. 8 (a) is the partial enlarged drawing of the rotor of the 3rd embodiment, and space group 23 is at permanent magnetic Near one end 21a, 21b of ferrum 12, not only it is arranged in outside the outer peripheral face 24 of permanent magnet 12 All sides, and it is also disposed in the inner circumferential side of inner peripheral surface, it addition, in the other end of permanent magnet 12 Near 21c, 21d, it is also disposed at the outer circumferential side of the outer peripheral face 24 of permanent magnet 12 or inner peripheral surface Inner circumferential side.

It addition, Fig. 8 (b) is the partial enlarged drawing of the rotor of the variation of the 3rd embodiment, empty Gap group 23 with the outer peripheral face 24 along permanent magnet 12 continuously and towards the length side of permanent magnet 12 The mode that space columns increases to both ends 21a, 21b, 21c, 21d is formed.

In these cases, by space group 23 can further inhibitory action in rotor core The demagnetizing field of the end of the permanent magnet 12 of the side that the inner peripheral surface 16 of 11 is close.

(the 4th embodiment)

Fig. 9 is the partial enlarged drawing of the rotor of the 4th embodiment of the present invention and variation thereof, (a) Space group 61 formed by the square space 62 as polygonal shape space, the space of (b) Group 61 is formed by the rhombus space 63 as polygonal shape space, and the space group 61 of (c) is by making Regular hexagon space 64 for polygonal shape space is formed.These spaces 62,63,64 are all in phase Form Second gap between the first adjacent space, between Second gap, form the 3rd space.That is, phase Respectively stagger one another along the outer peripheral face 24 of permanent magnet 12 in the space 62,63,64 of adjacent space row Substantially half spacing and configure.

Such that make each space variform in the case of, it is also possible to above-mentioned embodiment with Specify, it is possible to play same effect sample.Such as, at the square shown in Fig. 9 (a) In the case of space 62, as shown in Figure 10, when from end on observation, space group 61 possesses: will Multiple first space 62a formed along the outer peripheral face 24 of permanent magnet 12 with the first spacing P1 One space row 81；In the position than the first space row 81 outer circumferential side side, by multiple Second gap 62b The Second gap row 82 formed with the second spacing P2 along the outer peripheral face 24 of permanent magnet 12；Than The position of Second gap row 82 outer circumferential side side, by multiple 3rd space 62c along permanent magnet 12 The 3rd space row 83 that formed with the 3rd spacing P3 of outer peripheral face 24.

Further, between the adjacent pair Second gap 62b of Second gap row 82, it is formed with rib 85, And, in the direction that the imaginary line 86 extended from the central authorities with the width along rib 85 is parallel During observation, the first space 62a along the both sides on the direction of the outer peripheral face 24 of permanent magnet 12 End 84 relative to the adjacent pair Second gap 62b of Second gap row 82 along permanent magnet Respectively overlap on the direction of the outer peripheral face 24 of 12, extends along the central authorities of width of rib 85 At least some of by the first space 62a of imaginary line 86.

It should be noted that in this case, at the first imaginary line 87 and angle of the second imaginary line 88 When degree is for θ, θ ＜ 90 °, this first imaginary line 87 is by the side in the 62a of adjacent pair the first space The center O3 of center O1 and Second gap 62b link, this second imaginary line 88 is by a pair first The center O3 of the center O2 and Second gap 62b of the opposing party in the 62a of space links.And, The angle ψ of the 3rd imaginary line 89 and the 4th imaginary line 90 is also set to less than 90 ° (ψ ＜ 90 °), 3rd imaginary line 89 is by the center O3 and the 3rd of the side in adjacent pair Second gap 22b The center O5 of space 22c links, another by a pair Second gap 22b of the 4th imaginary line 90 The center O5 of the center O4 and the 3rd space 22c of one side links.It should be noted that at Figure 10 In, the first imaginary line 87 and the 3rd imaginary line 89 are expressed as same straight line but it also may constitute not Same straight line.

Rotor 10 according to present embodiment, space 62,63,64 is formed as when from end on observation The substantially polygonal shape such as regular hexagon shape, therefore, it is possible to make the space 62 in 1 space row, 63, the rib 66 each other of the space in 64 ribs 65 each other and adjacent space row is thick Thin uniform, it is possible to the reduction of the intensity of the locality of suppression rib 65,66.It is accordingly possible to ensure it is empty The size of gap 62,63,64, and suppress the reduction of the intensity of rib 65,66 simultaneously.

It should be noted that the present invention is not defined to aforesaid each embodiment and variation, it is possible to Suitably carry out deforming, improvement etc..

In the present embodiment, every a pair magnet insertion holes 13 of rotor core 11 changes magnetic pole Towards but it also may in each magnet insertion holes change magnetic pole towards, in this case, can It is respectively provided with space group with the outer circumferential side at the length direction both ends at permanent magnet 12.And, one Magnet insertion holes is not defined to cooperatively form the situation of V shape, it is also possible to be applicable in directly Situation about linearly arranging and formed, in this case, as long as also outside the length direction of permanent magnet The outer circumferential side of end is at least provided with space group.

It should be noted that the Japan Patent Shen that the present invention filed an application based on April 10th, 2012 Please (Patent 2012-089528), and using its content it is incorporated herein as reference.

Symbol description:

10 rotors

11 rotor cores

12,12a, 12b permanent magnet

13 magnet insertion holes

21,21a, 21b length direction outer end

22 spaces

22a, 62a first space

22b, 62b Second gap

22c, 62c the 3rd space

23,61 space group

The outer peripheral face of 24 permanent magnets

31,81 first space row

32,82 Second gap row

33,83 the 3rd space row

35,35a the first imaginary line

36,36a the second imaginary line

The end in 41 first spaces

55,56,57,71 rib

46,60,72 imaginary line

62 squares space (polygonal shape space)

63 rhombus spaces (polygonal shape space)

64 regular hexagon spaces (polygonal shape space)

The center of the side in O1 adjacent pair the first space

The center of the opposing party in O2 adjacent pair the first space

The center of O3 Second gap

P1 spacing

P2 spacing

P3 spacing

θ, ψ angle

Claims (10)

1. a rotor for electric rotating machine, it possesses:

Rotor core, it is formed with magnet insertion holes；And

Permanent magnet, it inserts to described magnet insertion holes,

The rotor of described electric rotating machine is characterised by,

Outer circumferential side in the length direction end of described permanent magnet is formed and is made up of multiple spaces Space group,

Described space group possesses:

First space；And

Second gap arranges, and it is in the position than described first outer circumferential side side, space, by multiple Second gaps Formed at a specific interval,

It is formed with rib between Second gap described in the adjacent pair that described Second gap arranges,

The direction parallel at the imaginary line extended from the central authorities with the width along described rib is seen When examining, the end of the both sides on the direction along the outer peripheral face of described permanent magnet in described first space Relative to Second gap described in the adjacent pair that described Second gap arranges along described permanent magnet Described outer peripheral face direction on respectively overlap,

The described imaginary line extended along the central authorities of width of described rib is empty by described first Gap at least some of,

The magnetic pole center side end of described space group from the outer peripheral face of described permanent magnet towards described turn The outer peripheral face extension that son is unshakable in one's determination.

The rotor of electric rotating machine the most according to claim 1, it is characterised in that

Described space group possess by multiple described first spaces along described permanent magnet outer peripheral face with The first space row that the spacing of regulation is formed.

The rotor of electric rotating machine the most according to claim 2, it is characterised in that

When the angle of the first imaginary line and the second imaginary line is θ, θ < 90 °, this first imaginary line will The center of the side in adjacent pair the first space and the central link of described Second gap, this is second years old The center at the center of the opposing party in the pair of first space with described Second gap is connected by imaginary line Knot.

4. according to the rotor of the electric rotating machine according to any one of claims 1 to 3, it is characterised in that

Described space is formed as round-shaped when from end on observation.

5. according to the rotor of the electric rotating machine according to any one of claims 1 to 3, it is characterised in that

Described space is formed as polygonal shape when from end on observation.

The rotor of electric rotating machine the most according to claim 5, it is characterised in that

Described space is shaped generally as regular hexagon shape when from end on observation.

The rotor of electric rotating machine the most according to claim 2, it is characterised in that

The end being positioned at magnetic pole center side described in described first space row, described Second gap row Space is along with being arranged in towards the outer peripheral face of described rotor core from the outer peripheral face of described permanent magnet Pole end piece side.

The rotor of electric rotating machine the most according to claim 2, it is characterised in that

Described space group compared with the circumferencial direction end of the outer peripheral face of described permanent magnet by along The outer peripheral face side of the described rotor core on the direction of the outer peripheral face of this permanent magnet is formed.

9. a rotor for electric rotating machine, it possesses:

Rotor core, it is formed with magnet insertion holes；And

Permanent magnet, it inserts to described magnet insertion holes,

The rotor of described electric rotating machine is characterised by,

Outer circumferential side in the length direction end of described permanent magnet is formed and is made up of multiple spaces Space group,

Described space group possesses:

First space row, it is when from end on observation, by multiple first spaces along described permanent magnet Outer peripheral face formed at a specific interval；And

Second gap, it is formed at adjacent one in the position than described first row outer circumferential side side, space Between the first space,

It is formed with rib between a side and described Second gap in the pair of first space,

The imaginary line extended along the central authorities of width of described rib is empty by the pair of first The opposing party in gap,

The magnetic pole center side end of described space group from the outer peripheral face of described permanent magnet towards described turn The outer peripheral face extension that son is unshakable in one's determination.

10. a rotor for electric rotating machine, it possesses:

Rotor core, it is formed with magnet insertion holes；And

Permanent magnet, it inserts to described magnet insertion holes,

The rotor of described electric rotating machine is characterised by,

Outer circumferential side in the length direction end of described permanent magnet is formed and is made up of multiple spaces Space group,

Described space group possesses:

First space row, it is when from end on observation, by multiple first spaces along described permanent magnet Outer peripheral face formed with the first spacing；

Second gap arranges, and it is in the position than described first row outer circumferential side side, space, empty by multiple second Gap is formed along the described outer peripheral face of described permanent magnet with the second spacing；And

3rd space, it is formed at adjacent one in the position than described Second gap row outer circumferential side side Between Second gap,

It is formed with rib between a side and described 3rd space in the pair of Second gap,

The imaginary line extended along the central authorities of width of described rib by described first space,

The magnetic pole center side end of described space group from the outer peripheral face of described permanent magnet towards described turn The outer peripheral face extension that son is unshakable in one's determination.