CN104011974B - Rotor - Google Patents
Rotor Download PDFInfo
- Publication number
- CN104011974B CN104011974B CN201180075936.5A CN201180075936A CN104011974B CN 104011974 B CN104011974 B CN 104011974B CN 201180075936 A CN201180075936 A CN 201180075936A CN 104011974 B CN104011974 B CN 104011974B
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- insertion holes
- magnet insertion
- magnet
- rotor
- main part
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- 238000003780 insertion Methods 0.000 claims abstract description 96
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000000875 corresponding Effects 0.000 claims abstract description 4
- 230000002093 peripheral Effects 0.000 claims description 17
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 17
- 229910000529 magnetic ferrite Inorganic materials 0.000 claims description 15
- 229910000859 α-Fe Inorganic materials 0.000 claims description 15
- 230000004907 flux Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised Effects 0.000 description 1
Abstract
The rotor of the present invention（1）Including：Rotor core（1a）, by each magnetic pole, the convex and radially arranged magnet insertion holes in side respectively inwards are set（2、3）, and magnet insertion holes（2、3）It is circumferentially configured corresponding to number of magnetic poles；And permanent magnet（4、5）, it is writing board shape, is respectively inserted into magnet insertion holes（2、3）In, it is configured at the innermost side and magnet insertion holes adjacent in the circumferential（3）It is set to, magnet insertion holes（3）Width gradually increase towards inner circumferential side so that the magnet insertion holes in circumferential direction（3）Between iron core width immobilize radially.
Description
Technical field
The present invention relates to the rotors of electric rotating machine.
Background technology
Patent Document 1 discloses the synchronous reluctance motors being designed to such as lower structure：Its rotor has radially
The total magnetic flux of two layers of permanent magnet, peripheral side permanent magnet is more than the total magnetic flux of inner circumferential side permanent magnet or substantially same.
Patent document 1：Japanese Unexamined Patent Publication 2002-272031 bulletins
Invention content
In reluctance motor, reluctance torque is also utilized in addition to magnetic torque, therefore preferably use can increase magnetic resistance turn
The magnet insertion holes shape of square, in patent document 1, although there is announcement to be inserted into rare earth element magnet, in inner circumferential in peripheral side
The record of side insertion ferrite lattice, but the magnet insertion holes shape not on the books that reluctance torque can be increased.
The present invention completes in view of the foregoing, and its purpose is to provide a kind of rotor, magnetic resistance can be increased by, which having, turns
Square is so as to realizing the magnet insertion holes shape of high output.
Realize that goal of the invention, rotor of the present invention include to solve the above-mentioned problems：Rotor core, by each magnetic
Pole is provided with the convex and radially arranged multilayer magnet insertion holes in side respectively inwards, and above-mentioned multilayer magnet insertion holes
It is circumferentially configured corresponding to number of magnetic poles；And permanent magnet, it is writing board shape, is respectively inserted into above-mentioned each magnet insertion holes
In, it is configured at the innermost side and magnet insertion holes adjacent in the circumferential is set to, the width of the magnet insertion holes is towards inner circumferential
Side gradually increases, so that the iron core width between the magnet insertion holes in above-mentioned circumferential direction immobilizes radially.
According to the present invention, reluctance torque can be increased to realize the effect of height output by playing.
Description of the drawings
Fig. 1 is the vertical view of the shape of the rotor core 1a (rotor core) for the rotor 1 for indicating that embodiment is related to.
Fig. 2 is the magnified partial view of Fig. 1.
Fig. 3 is the vertical view of the structure for the rotor 1 for indicating that embodiment is related to.
Fig. 4 is the magnified partial view of Fig. 3.
Fig. 5 is the vertical view of the structure for the rotor 100 for indicating that comparative example is related to.
Fig. 6 is the magnified partial view of Fig. 5.
Fig. 7 is the magnified partial view of Fig. 5.
Fig. 8 is the magnified partial view of Fig. 5.
Symbol description
1,100 rotor
1a, 100a rotor core
2,3,102,103 magnet insertion holes
2a, 3a main part
The end 2b, 3b
4,5,104,105 permanent magnet
6 iron core portions
10 bridge portions
20,120 axis hole
Specific implementation mode
In the following, the embodiment of rotor of the present invention is described in detail based on attached drawing.In addition, the present invention is not
It is defined in present embodiment.
Embodiment
The rotor (rotor) of motor of the present embodiment is illustrated.Fig. 1 is to indicate that present embodiment is related to
Rotor 1 rotor core 1a (rotor core) shape vertical view, Fig. 2 is the magnified partial view of Fig. 1.Motor is for example
It is reluctance motor.
Rotor core 1a is cylindrical, is provided with the axis hole 20 for inserting axis (not shown) in center portion.Rotor iron
Core 1a is for example laminated multi-disc plate thickness and is constituted for the electromagnetic steel plate of the relatively thin magnetic substance plank of 0.1~1mm or so.In addition, rotor 1
It is configured in a manner of it can rotate in the inside of circular stator (not shown).
It has circumferentially for example been equally spaced multiple (being, for example, 6 in illustrated example) in the peripheral part of rotor core 1a
Magnet insertion holes 2,3 are radially for example arranged in two layers same.Here, magnet insertion holes 2 are set to peripheral side, magnet
It is inserted into hole 3 and is set to inner circumferential side.Magnet insertion holes 2,3 are with from peripheral side to the inner circumferential side side convex (i.e. towards rotor center)
Formula arranges, specifically its section substantially disk like.In rotor 1, formed by radially arranged two layers of magnet insertion holes 2,3
Magnetic pole.
The magnet insertion holes 2 for being configured at the outermost side include：Main part 2a, along the arrangement with magnet insertion holes 2,3
The width T1 that direction (same radial direction) substantially orthogonal direction is kept fixed it is extended；And each end 2b, respectively with
The both sides of main part 2a are communicatively arranged, and the extending direction relative to main part 2a is at obtuse angle towards peripheral side and holding
Fixed width T1 it is extended.In addition, each end 2b is asymmetrically formed relative to main part 2a.
The magnet insertion holes 3 for being configured at the innermost side include：Main part 3a, along the arrangement with magnet insertion holes 2,3
The width T2 that direction (same radial direction) substantially orthogonal direction is kept fixed it is extended；And each end 3b, respectively with
The both sides of main part 3a are communicatively arranged, and the extending direction relative to main part 3a at obtuse angle is set towards peripheral side extension
It sets.In addition, each end 3b is asymmetrically formed relative to main part 3a.
Magnet insertion holes 2 and 3 configure substantially in parallel.Magnet insertion holes 3 and 2 phase of magnet insertion holes for being configured at peripheral side
Than, it is all longer on long side direction and the two directions of short side direction, such as T2 ＞ T1 (Fig. 2).In addition, adjacent in the circumferential
Between magnet insertion holes 2, it is configured with the opposite end 3b of magnet insertion holes 3.
Then, the shape of the end 3b of magnet insertion holes 3 is illustrated.As shown in Fig. 2, the width of end 3b is from periphery
Lateral inner circumferential side gradually increases.Specifically, the width design of end 3b is gradually to increase towards rotor center side, so that making
The iron core width t in the iron core portion 10 in the bridge portion between opposite end 3b immobilizes radially.In illustrated example, end
The width of portion 3b is, for example, T2 in the outermost side, is gradually increased towards rotor center side.
Fig. 3 is the vertical view for the structure for indicating rotor 1 of the present embodiment, and Fig. 4 is the magnified partial view of Fig. 3.Such as
Shown in Fig. 3 and Fig. 4, the permanent magnet 4 inserted with writing board shape in magnet insertion holes 2, inserted with flat in magnet insertion holes 3
The permanent magnet 5 of plate shape.A magnetic pole of rotor 1 is made of the group of permanent magnet 4,5.In illustrated example, rotor 1 is 6 poles.
In addition, as shown in Figure 1 to 4, the thickness (radial width of permanent magnet 4) of permanent magnet 4 is substantially equal to T1.Forever
Long magnet 4 is configured out of magnet insertion holes 2 main part 2a to the 2b of end, and in end, a part of 2b is formed with gap.Forever
The thickness (radial width of permanent magnet 5) of long magnet 5 is substantially equal to T2.Main part 3a of the permanent magnet 5 from magnet insertion holes 3
In interior configuration to end 3b, in end, a part of 3b is formed with gap.In addition, being provided with iron between magnet insertion holes 2,3
Core 6, the iron core portion 6 is for making the magnetic flux generated by permanent magnet 4,5 pass through.
Permanent magnet 4,5 is geomagnetic into its pole N and the poles S are alternately arranged radially.That is, constituting the permanent magnetic of a magnetic pole
It is mutually the same that iron 4,5 is configured to its flow direction.In addition, to be configured to adjacent magnetic pole its polarity opposite for permanent magnet 4,5.This
Outside, two pairs of permanent magnets 4,5 are shown in FIG. 4, for the direction of the one pair of which poles N indicated by an arrow, another pair is used
Arrow indicates the direction of the poles S.
In addition, as permanent magnet 4,5, such as permanent magnet 4 can be made to be rare earth element magnet, it is iron to make permanent magnet 5
Oxysome magnet.That is, being inserted into rare earth element magnet in the magnet insertion holes 2 for being configured at the outermost side, it is being configured at the innermost side
It is inserted into ferrite lattice in magnet insertion holes 3.
In the above description, for example, make each magnetic pole of composition magnet insertion holes be two layers, but can also use make its for
There are three the structures of above permanent magnet for arrangement in three layers or more and each magnetic pole.In this case, at least make configuration
Shape same as magnet insertion holes 3 may be used in the magnet insertion holes of the innermost side, make the magnet for being configured at the outermost side
It is inserted into hole and shape same as magnet insertion holes 2 may be used.It is configured at most inner circumferential furthermore, it is possible to which ferrite lattice is inserted into
In the magnet insertion holes of side, rare earth element magnet is inserted into the magnet insertion holes for being configured at the outermost side.In turn, can make to match
The width for being placed in the main part of the magnet insertion holes of the innermost side is more than the main part for the magnet insertion holes for being configured at the outermost side
Width so that be configured at the rare earth element magnet of the outermost side thickness be less than be configured at the innermost side ferrite lattice thickness
Degree.In addition, the shape of the magnet insertion holes of middle layer other than the outermost side or the innermost side may be used and magnet insertion holes 2
Or 3 same shape of magnet insertion holes.In this case it is possible, for example, to by the magnet of shape same as magnet insertion holes 2
It is inserted into hole and is configured at peripheral side, the magnet insertion holes of shape same as magnet insertion holes 3 are configured at inner circumferential side.
Then, the action of present embodiment is illustrated.In reluctance motor, in order to realize that high output needs
Effect utilizes reluctance torque.With reference to Fig. 5~Fig. 8, reluctance torque is illustrated.Fig. 5 is the rotor 100 for indicating comparative example and being related to
The vertical view of structure.In addition, Fig. 6 is the magnified partial view of Fig. 5, magnetic circuit is shown.Fig. 7 is the magnified partial view of Fig. 5, is shown
Iron core width between adjacent magnet insertion holes 103.Fig. 8 is the magnified partial view of Fig. 5, for illustrating magnet insertion holes 103
Shape and reluctance torque between relationship.
Rotor 100 has the rotor core 100a that axis hole 120 is provided in central part.In the peripheral part of rotor core 100a
Multiple (being, for example, 6 in illustrated example) magnet insertion holes 102,103 are circumferentially for example equally spaced, in same diameter
It is for example arranged in two layers upwards.Here, magnet insertion holes 102 are set to peripheral side, and magnet insertion holes 103 are set to inner circumferential side.
In rotor 100, magnetic pole is formed as unit of radially arranged two layers of magnet insertion holes 102,103.Magnet insertion holes 102,
103 in addition to size, is same shape with the magnet insertion holes 2 in Fig. 1~Fig. 4.That is, in the comparative example, magnet is inserted into
The width in hole 103 immobilizes.In addition, magnet insertion holes 103 are compared with magnet insertion holes 102, in long side direction and short side side
It is all longer on the two directions.In magnet insertion holes 102,103, respectively the permanent magnet 104 inserted with writing board shape,
105。
Magnet insertion holes 102,103 are filled other than the part inserted with permanent magnet 104,105 by air, so
Be formed in rotor core 100a magnetic flux be easy the direction (d axis directions) passed through and be difficult to by direction (q axis directions) (figure
6)。
In addition, when to set P as number of pole-pairs, Ld be d axle inductances, Lq is q axle inductances, id is d shaft currents, iq is q shaft currents,
It is given by the torque tau (reluctance torque) of reluctance motor.
τ=P × (Ld-Lq) × id × iq
Therefore, in order to improve torque tau, it is important that increase Ld and reduce Lq.Here, in order to increase Ld, needing to use makes d axis
The magnetic flux in direction is easy the rotor shapes passed through, in order to reduce Lq, need using make the magnetic flux of q axis directions be difficult to by rotor
Shape.In this comparative example, the iron core width between magnet insertion holes 102 and 103 immobilizes, but adjacent magnet is inserted into
Iron core width between hole 103 is most narrow (width t ') in most peripheral, is become larger (Fig. 7) towards inner circumferential side.In this case,
Between adjacent magnet insertion holes 103, the magnetic flux for flowing in or out the d axis directions of rotor 100 is inserted depending on adjacent magnet
Enter the width t ' at the most narrow part of iron core width between hole 103, i.e. most peripheral, therefore the area indicated by hacures in Fig. 8
Domain D is the unwanted core portion when making magnetic flux pass through.
As a result, by making region D become gap, be able to maintain that Ld is constant, and reduce Lq, can increase reluctance torque and
Expect the high output of motor.Therefore, in the present embodiment, the part that will be equivalent to region D is arranged in magnet insertion holes 3
In.In addition, as shown in figure 8, by make region D become magnet insertion holes a part, the writing board shape being inserted into it is permanent
The width (width in the direction orthogonal with magnet array direction) of magnet (such as ferrite lattice) becomes L2 (L2 ＞ L1) from L1,
It is inserted into the permanent magnet of width bigger, therefore high magnetic force can be further realized.
In addition, in the present embodiment, other than using above-mentioned reluctance torque, in order to utilize magnetic torque, such as in magnetic
Iron is inserted into hole 2 inserted with rare earth element magnet, inserted with ferrite lattice (Fig. 3, Fig. 4) in magnet insertion holes 3.It removes as a result,
Other than the magnetic force of magnetic force stronger rare earth element magnet, additionally it is possible to secondarily utilize the magnetic force of ferrite lattice.If
The magnet being inserted into magnet insertion holes 2,3 all uses rare earth element magnet, then can further realize high magnetic force, but a large amount of
It can lead to cost increase using rare terres rares, it is not preferable.
In addition, ferrite lattice coercivity for rare earth element magnet is relatively low, if from stator (stator)
Demagnetizing field increase is then likely to result in demagnetizing, therefore the magnet thickness of preferably ferrite lattice is more than the magnet thickness of rare earth element magnet
It spends (T1 ＜ T2).
In the present embodiment, rotor includes：Rotor core, by each magnetic pole be provided with side respectively inwards it is convex and
Radially arranged multilayer magnet insertion holes, and above-mentioned multilayer magnet insertion holes are circumferentially configured corresponding to number of magnetic poles；And
Permanent magnet is writing board shape, is respectively inserted into above-mentioned each magnet insertion holes, in above-mentioned rotor, is configured at most interior
Side and magnet insertion holes adjacent in the circumferential are set to, the width of the magnet insertion holes gradually increases towards inner circumferential side, with
So that the iron core width between the magnet insertion holes in above-mentioned circumferential direction immobilizes radially, therefore magnetic resistance can be increased and turned
Square realizes the high output of motor.Furthermore it is possible to increase the magnet width of the permanent magnet for the writing board shape being inserted into, from
And it can realize high magnetic force and high efficiency.
In addition, in the present embodiment, in the multilayer magnet insertion holes for constituting each magnetic pole, at least in the magnet of the outermost side
It inserts in the hole inserted with rare earth element magnet, inserted with ferrite lattice in the magnet insertion holes of the innermost side.In this way, in addition to making
Other than magnetic force with the rare earth element magnet of the outermost side, the magnetic force of the ferrite lattice of the innermost side is also secondarily used, by
This can cut down the usage amount of rare rare earth element magnet, and can also realize high magnetic force and high efficiency.
In addition, in the present embodiment, being inserted into the ferrite lattice in the magnet insertion holes of the innermost side in radial direction
On width (thickness) to be more than the diametrical width of rare earth element magnet being inserted into the magnet insertion holes of the outermost side (thick
Degree).In this way, by increase compared with rare earth element magnet the magnet thickness of the lower ferrite lattice of coercivity by make anti-demagnetization
By force, so as to providing quality high motor.
As described above, the present invention can be suitably applied such as reluctance motor.
Claims (5)
1. a kind of rotor, which is characterized in that including：
Rotor core is provided with the convex and radially arranged multilayer magnet insertion holes in side respectively inwards by each magnetic pole,
And the multilayer magnet insertion holes are circumferentially configured corresponding to number of magnetic poles；And
Permanent magnet is writing board shape, is respectively inserted into each magnet insertion holes,
Each for being configured at the magnet insertion holes of the innermost side includes：
First main part is trapezoidal shape, has the first lower part extended parallel on the direction orthogonal with the radial direction
And first top, and first lower part than described first on minister；And
First both ends, respectively the side with the trapezoidal shape of first main part be continuously provided, and relative to
The extending direction of first main part at obtuse angle is extended from the side towards the peripheral side of the rotor core respectively,
First both ends have flat part in the peripheral side respectively,
The respective width in first both ends is from the flat part of the peripheral side towards the side of the trapezoidal shape
Face gradually increases, so that being configured at the innermost side and the iron core width between magnet insertion holes adjacent in the circumferential is in radial direction
On immobilize, the first writing board shape being inserted into each for the magnet insertion holes for being configured at the innermost side
Permanent magnet each, be respectively inserted into each magnet insertion holes,
A part at first both ends is formed with first gap,
It is inserted into first writing board shape in each for the magnet insertion holes for being configured at the innermost side
Each of permanent magnet fills first main part and the filling respective part in the first both ends.
2. rotor according to claim 1, it is characterised in that：
Each for being configured at the magnet insertion holes of the outermost side includes：
Second main part is trapezoidal shape, is had on the direction orthogonal with the orientation of multilayer magnet insertion holes
The second lower part and the second top extended parallel to, and second lower part than described second on minister；And
Second both ends, respectively the side with the trapezoidal shape of second main part be continuously provided, and relative to this
The extending direction of second main part, which at obtuse angle extends from each side of the side of the trapezoidal shape towards peripheral side, to be set
It sets,
It is inserted into the permanent of the second writing board shape in each for the magnet insertion holes for being configured at the outermost side
Each of magnet is configured at each of the magnet insertion holes from second main part towards second both ends
It is a,
A part at second both ends is formed with Second gap,
It is inserted into second writing board shape in each for the magnet insertion holes for being configured at the outermost side
Each of permanent magnet fills second main part and the filling respective part in the second both ends.
3. rotor according to claim 1, it is characterised in that：
In the multilayer magnet insertion holes, inserted with rare earth element magnet in the magnet insertion holes of the outermost side, in the innermost side
Magnet insertion holes in inserted with ferrite lattice.
4. rotor according to claim 3, it is characterised in that：
The radial width of the rare earth element magnet is less than the radial width of the ferrite lattice.
5. a kind of motor comprising rotor any one of Claims 1-4.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/080054 WO2013098912A1 (en) | 2011-12-26 | 2011-12-26 | Rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104011974A CN104011974A (en) | 2014-08-27 |
| CN104011974B true CN104011974B (en) | 2018-08-31 |
Family
ID=
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741354A (en) * | 2004-08-26 | 2006-03-01 | Lg电子株式会社 | Permanent magnet assisted SYNRM and method for imposing magnetic force thereon |
| CN102171909A (en) * | 2008-11-19 | 2011-08-31 | 三菱电机株式会社 | Rotor of motor and motor and fan and compressor |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741354A (en) * | 2004-08-26 | 2006-03-01 | Lg电子株式会社 | Permanent magnet assisted SYNRM and method for imposing magnetic force thereon |
| CN102171909A (en) * | 2008-11-19 | 2011-08-31 | 三菱电机株式会社 | Rotor of motor and motor and fan and compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Tokyo, Japan Applicant after: Missubishi Electric Co., Ltd. Address before: Japan Tokyo Chiyoda Applicant before: Missubishi Electric Co., Ltd. |
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| GR01 | Patent grant |