CN209046391U - Permanent-magnetic synchronous motor rotor with air magnetic barrier - Google Patents
Permanent-magnetic synchronous motor rotor with air magnetic barrier Download PDFInfo
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- CN209046391U CN209046391U CN201822131667.1U CN201822131667U CN209046391U CN 209046391 U CN209046391 U CN 209046391U CN 201822131667 U CN201822131667 U CN 201822131667U CN 209046391 U CN209046391 U CN 209046391U
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Abstract
A kind of permanent-magnetic synchronous motor rotor with air magnetic barrier, is related to technical field of motors, the solution is to improve weak magnetism speed expansion ability.The rotor includes rotor core, and is fixed on multiple surface magnets of rotor core outer peripheral surface, and each surface magnet is symmetrically spaced laying around the axle center of rotor core；The middle part of the surface magnet is protruded along the radially outward arc of rotor core, so that surface magnet is in the thin bread-like in thick middle two sides in the radial section of rotor core, and surface magnet is divided into symmetrical two halves by the d-axis of rotor core；Multiple surface magnetic barrier grooves being radially-inwardly recessed are formed on the outer peripheral surface of the rotor core, each surface magnetic barrier groove is distributed between each surface magnet, a surface magnetic barrier groove is laid between every two adjacent surface magnet, and magnetic barrier groove in surface is divided into symmetrical two halves by the quadrature axis of rotor core.Rotor provided by the utility model can improve motor dynamics performance.
Description
Technical field
The utility model relates to motor technologies, more particularly to a kind of skill of permanent-magnetic synchronous motor rotor with air magnetic barrier
Art.
Background technique
Motor is the core of electrical drive system, and performance, the efficiency of motor directly affect the performance of electric car.It uses at present
In the wide range speed control of electric car, high torque (HT) permanent magnet synchronous motor (PMSM) there is also technical bottleneck, it is low that there are power densities, high
Fast invariable power narrow range, the defects of torque fluctuations are big, overload capacity is low and poor reliability, it is difficult to meet the requirements.
It can be surface-mounted permanent-magnetic rotor structure and interior PMSM points according to the difference of rotor permanent magnet allocation position
Set formula permanent magnet rotor structure two major classes.
Internal permanent magnet synchronous motor (IPMSM) is compared to the advantages of surface-mounted permanent magnet synchronous motor (SPMSM):
The rotor of IPMSM is typical salient-pole structure, and axis inductor is greater than d-axis inductance (Lq > Ld), belongs to weak magnetic type structure, have convex
Polar effect, convex grey subset=(Lq/Ld) > 1 deposit motor superposition reluctance torque, reluctance torque on the basis of permanent-magnet torque
In the starting characteristic, overload capacity and power density for helping to improve motor, it is easy to weak-magnetic speed-regulating, expands invariable power range fortune
Row, but weak magnetic (that is: increase stator d-axis demagnetizing current component) is had to be by obtain reluctance torque, it is big that there is leakage fields,
The small defect of permanent torque.
Surface-mounted permanent magnet synchronous motor (SPMSM) is compared to the advantages of internal permanent magnet synchronous motor (IPMSM):
The features such as SPMSM leakage field is few, and torque is big, and torque pulsation is low, and structure is simple, and manufacturing cost is low, and rotary inertia is small, suitable for low
The Direct Driving System of fast, big torque.
But there is following defects for SPMSM traditional structure for a long time: permanent magnet is usually in tile shape (arc), and is located at
On the outer surface of rotor core, since the opposite recoil permeability of permanent magnet is close to air, cross, straight axis air gap is uniform, cross, straight axis
Inductance is equal (Ld=Lq), belongs to non-salient pole magnetic circuit on electromagnetic performance, does not generate reluctance torque, and since effective air gap is larger, than
IPMSM is more difficult to solve weak magnetism speed expansion, it is necessary to and it is passed through very big direct-axis current in the stator windings, achievees the purpose that weak magnetism speed expansion,
This method can reduce torque, increase stator loss, reduce drive-train efficiency, and power density is low, and may cause permanent magnetism
Body irreversible demagnetization is dangerous, and weak magnetism speed expansion ability difference is to hinder basic reason of the SPMSM to high speed development.
Utility model content
For above-mentioned defect existing in the prior art, the technical problem to be solved by the utility model is to provide a kind of weak
The good permanent-magnetic synchronous motor rotor with air magnetic barrier of magnetism speed expansion ability.
In order to solve the above-mentioned technical problem, a kind of permanent magnet synchronous motor with air magnetic barrier provided by the utility model turns
Son, including rotor core, and multiple surface magnets of rotor core outer peripheral surface are fixed on, each surface magnet surrounds rotor core
Axle center be symmetrically spaced laying；It is characterized by:
The middle part of the surface magnet is protruded along the radially outward arc of rotor core, so that surface magnet is in rotor core
Radial section in the thin bread-like in thick middle two sides, and surface magnet is divided into symmetrical two by the d-axis of rotor core
Half；
Multiple surface magnetic barrier grooves being radially-inwardly recessed, each surface magnetic are formed on the outer peripheral surface of the rotor core
Barrier groove is distributed between each surface magnet, and a surface magnetic barrier groove is laid between every two adjacent surface magnet,
And magnetic barrier groove in surface is divided into symmetrical two halves by the quadrature axis of rotor core.
Further, the surface magnetic barrier groove is the arc groove of radially-inwardly arc-shaped recess；In the rotor core
Hinder slot equipped with multiple inner magnets, the inner magnet barrier slot is the arc line shaped slot protruded to inner arc, and inner magnet hinders the number of slot
Amount is consistent with the surface magnetic barrier quantity of groove, and each inner magnet barrier slot and each surface magnetic barrier groove correspond, and mutually
Corresponding inner magnet barrier slot, surface magnetic barrier groove part are laid with one heart, and inner magnet barrier slot is divided by the quadrature axis of rotor core
Symmetrical two halves.
Further, if the radius of surface magnetic barrier groove is L1, inner magnet hinders slot in the width of rotor core radially and is
H1, surface magnet at rotor core d-axis with a thickness of hm1, then have (L1+h1) > hm1.
Further, surface magnetic barrier groove is the isosceles trapezoid groove being radially-inwardly recessed, in the rotor core
Hindering slot equipped with multiple inner magnets, the inner magnet barrier slot is tri linear shape wire casing inwardly projecting and in isosceles trapezoid bending, and
And the quantity of inner magnet barrier slot is consistent with the surface magnetic barrier quantity of groove, each inner magnet barrier slot surrounds the axle center pair of rotor core
Interval is claimed to lay, and inner magnet barrier slot is divided into symmetrical two halves by the quadrature axis of rotor core.
Further, the surface magnetic barrier groove is the U-shaped groove being radially-inwardly recessed.
Further, if surface magnetic barrier groove depth be L3, surface magnet at rotor core d-axis with a thickness of
Hm3 then has L3 > hm3.
Permanent-magnetic synchronous motor rotor provided by the utility model with air magnetic barrier passes through the surface magnet and sky of bread-like
Gas magnetic flux barrier, which is constituted, increases magnetic-type structure, overcomes existing surface-mounted permanent magnet synchronous motor and internal permanent magnet synchronous motor
Disadvantage, by increase magnetoelectricity stream+Id auxiliary surface magnet magnetic flux, rise increase magnetic action, can reduce surface magnet demagnetization risk,
It can be reduced the volume, weight, cost of surface magnet, so as to reduce rotor centrifugal force, improve weak magnetism speed expansion ability, expand permanent function
The operation of rate range.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the permanent-magnetic synchronous motor rotor with air magnetic barrier of the utility model first embodiment；
Fig. 2 is the structural schematic diagram of the permanent-magnetic synchronous motor rotor with air magnetic barrier of the utility model second embodiment；
Fig. 3 is the structural schematic diagram of the permanent-magnetic synchronous motor rotor with air magnetic barrier of the utility model 3rd embodiment；
Fig. 4 be existing cross, straight axle inductance equal (Ld=Lq) motor and the utility model 3rd embodiment torque/
Rotation speed characteristic figure.
Specific embodiment
The embodiments of the present invention are described in further detail below in conjunction with Detailed description of the invention, but the present embodiment and are not had to
In limitation the utility model, all similar structures and its similar variation using the utility model should all be included in the utility model
Protection scope, the pause mark in the utility model indicates the relationship of sum, and the English alphabet in the utility model is case sensitive.
As shown in Figure 1, a kind of permanent magnet synchronous motor turn with air magnetic barrier provided by the utility model first embodiment
Son, including rotor core 11, and multiple surface magnets 12 of rotor core outer peripheral surface are fixed on, each surface magnet surrounds rotor
The axle center of iron core is symmetrically spaced laying；
The middle part of the surface magnet 12 is protruded along the radially outward arc of rotor core 11, so that surface magnet 12 is turning
In the thin bread-like in thick middle two sides in the radial section of sub- iron core, and the d-axis (pole center line, d axis) of rotor core 11
Surface magnet 12 is divided into symmetrical two halves；
The surface magnetic barrier groove 13 of multiple radially-inwardly arc-shaped recess is formed on the outer peripheral surface of the rotor core 11, respectively
A surface magnetic barrier groove 13 is distributed between each surface magnet 12, is laid with one between every two adjacent surface magnet 12
Surface magnetic hinders groove 13, and magnetic barrier groove 13 in surface is divided into symmetrically by the quadrature axis (interpolar center line, q axis) of rotor core
Two halves；
The rotor core 11 is equipped with multiple inner magnets and hinders slot 14, and the inner magnet barrier slot 14 is protruded to inner arc
Arc line shaped slot, and quantity and surface magnetic the barrier quantity of groove 13 of inner magnet barrier slot 14 are consistent, each inner magnet barrier slot 14 and
Each surface magnetic barrier groove 13 corresponds, and mutual corresponding inner magnet barrier slot 14, surface magnetic hinder all concentric cloth of groove 13
If constituting inside and outside dual air-gap flux barrier, and inner magnet barrier slot 14 is divided into symmetrically by the quadrature axis (q axis) of rotor core
Two halves.
If the radius that surface magnetic hinders groove 13 is L1, it is h1, table that inner magnet, which hinders slot 14 in the width of rotor core radially,
Face magnet 12 at rotor core d-axis with a thickness of hm1, then have (L1+h1) > hm1.
The utility model first embodiment is using the surface magnet of bread-like and the combination of inside and outside dual air-gap flux barrier
Optimize magnetic structure, stops the magnetic flux path of rotor core quadrature axis, increase the effective air gap of rotor core quadrature axis, make rotor iron
The total gas length of synthesis of heart quadrature axis is greater than the diametrical magnetization thickness of surface magnet, causes rotor core quadrature axis (q axis) magnetic resistance Rq
I.e. greater than rotor core d-axis (d axis) magnetic resistance Rd(: Rq > Rd), and inductance is inversely proportional with magnetic resistance, so that rotor core d-axis inductance
Greater than rotor core axis inductor (that is: Ld > Lq), the increasing magnetic-type structure of Ld > Lq is formed, by increasing the positive d-axis of magnetoelectricity stream+Id(
Electric current) reluctance torque is obtained, as motor speed increases and reach voltage limit ,+Id is gradually reduced, so that Id finally becomes
Only a small amount of-Id is needed to can be obtained good weak magnetism speed expansion energy more than rated speed to further suppress voltage for-Id
Power can expand the operation of invariable power range, loss is effectively reduced, improve system effectiveness, power density and torque density.
As shown in Fig. 2, the difference of the utility model second embodiment and first embodiment is: in second embodiment, turning
Surface magnetic barrier groove 23 on sub- 21 outer peripheral surface of iron core is the isosceles trapezoid groove being radially-inwardly recessed, interior in rotor core 21
Magnetic barrier slot 24 in portion's is tri linear shape wire casing inwardly projecting and in isosceles trapezoid bending, and each inner magnet barrier slot 24 surrounds rotor iron
The axle center of the heart is symmetrically spaced laying, and each inner magnet barrier slot 24 is also corresponded with each surface magnetic barrier groove 23, corresponded to each other
Inner magnet barrier slot 24, surface magnetic barrier groove 23 constitute inside and outside dual air-gap flux barrier, and the quadrature axis (q axis) of rotor core
Also surface magnetic is hindered into groove 23, inner magnet barrier slot 24 is divided into symmetrical two halves.
As shown in figure 3, the difference of the utility model 3rd embodiment and first embodiment is: in 3rd embodiment, turning
Surface magnetic barrier groove 33 on sub- 31 outer peripheral surface of iron core is the U-shaped groove being radially-inwardly recessed, and is not had in rotor core 31
There is setting inner magnet to hinder slot；
If surface magnetic hinder groove 33 depth be L3, surface magnet 32 at rotor core d-axis with a thickness of hm3, then have
The depth of L3 > hm3, surface magnetic barrier groove 33 refer to: surface magnetic hinders the slot bottom of groove 33 and surface magnet 32 turns with rotor core
The spacing being formed by when dynamic between outer Circular test.
The working principle of second, third embodiment of the utility model is similar with the first implementation.
Fig. 4 is that the motor (hereinafter referred to as are as follows: existing motor) of existing cross, straight axle inductance equal (Ld=Lq) is practical with this
The torque/speed Property comparison of novel 3rd embodiment (increasing magnetic-type Ld > Lq), Nn therein are rated speed, and Tn is specified
Torque, Tmax are torque capacity, and Nmax1 is the maximum (top) speed of existing motor, Nmax2 be the utility model 3rd embodiment most
Big revolving speed, S1 are the torque/speed characteristic curve of existing motor, and S2 is that the torque/speed of the utility model 3rd embodiment is special
Linearity curve, X1 are permanent torque area, and X2 is invariable power area；
From fig. 4, it can be seen that Nmax2 > Nmax1, high speed invariable power area expansion speed ability is significantly improved.
Claims (6)
1. a kind of permanent-magnetic synchronous motor rotor with air magnetic barrier, including rotor core, and it is fixed on rotor core outer peripheral surface
Multiple surface magnets, each surface magnet are symmetrically spaced laying around the axle center of rotor core；It is characterized by:
The middle part of the surface magnet is protruded along the radially outward arc of rotor core, so that diameter of the surface magnet in rotor core
Into section in the bread-like that thick middle two sides are thin, and surface magnet is divided into symmetrical two halves by the d-axis of rotor core；
Multiple surface magnetic barrier grooves being radially-inwardly recessed are formed on the outer peripheral surface of the rotor core, each surface magnetic barrier is recessed
Slot is distributed between each surface magnet, and a surface magnetic barrier groove is laid between every two adjacent surface magnet, and
Magnetic barrier groove in surface is divided into symmetrical two halves by the quadrature axis of rotor core.
2. the permanent-magnetic synchronous motor rotor according to claim 1 with air magnetic barrier, it is characterised in that: the surface magnetic barrier
Groove is the arc groove of radially-inwardly arc-shaped recess；The rotor core is equipped with multiple inner magnets and hinders slot, the inner magnet
Barrier slot is the arc line shaped slot protruded to inner arc, and the quantity of inner magnet barrier slot is consistent with the surface magnetic barrier quantity of groove, respectively
A inner magnet barrier slot and each surface magnetic barrier groove correspond, and mutual corresponding inner magnet barrier slot, surface magnetic hinder groove
It all lays with one heart, and inner magnet barrier slot is divided into symmetrical two halves by the quadrature axis of rotor core.
3. the permanent-magnetic synchronous motor rotor according to claim 2 with air magnetic barrier, it is characterised in that: it is recessed to set surface magnetic barrier
The radius of slot is L1, and it is h1 that inner magnet, which hinders slot in the width of rotor core radially, and surface magnet is at rotor core d-axis
With a thickness of hm1, then there is (L1+h1) > hm1.
4. the permanent-magnetic synchronous motor rotor according to claim 1 with air magnetic barrier, it is characterised in that: the surface magnetic barrier
Groove is the isosceles trapezoid groove being radially-inwardly recessed, and the rotor core is equipped with multiple inner magnets and hinders slot, the inner magnet
Barrier slot is tri linear shape wire casing inwardly projecting and in isosceles trapezoid bending, and the quantity of inner magnet barrier slot and surface magnetic barrier are recessed
The quantity of slot is consistent, and each inner magnet barrier slot is symmetrically spaced laying, and the quadrature axis of rotor core around the axle center of rotor core
Inner magnet barrier slot is divided into symmetrical two halves.
5. the permanent-magnetic synchronous motor rotor according to claim 1 with air magnetic barrier, it is characterised in that: the surface magnetic barrier
Groove is the U-shaped groove being radially-inwardly recessed.
6. the permanent-magnetic synchronous motor rotor according to claim 5 with air magnetic barrier, it is characterised in that: it is recessed to set surface magnetic barrier
The depth of slot be L3, surface magnet at rotor core d-axis with a thickness of hm3, then have L3 > hm3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822131667.1U CN209046391U (en) | 2018-12-19 | 2018-12-19 | Permanent-magnetic synchronous motor rotor with air magnetic barrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822131667.1U CN209046391U (en) | 2018-12-19 | 2018-12-19 | Permanent-magnetic synchronous motor rotor with air magnetic barrier |
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| Publication Number | Publication Date |
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| CN209046391U true CN209046391U (en) | 2019-06-28 |
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ID=67044584
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822131667.1U Active CN209046391U (en) | 2018-12-19 | 2018-12-19 | Permanent-magnetic synchronous motor rotor with air magnetic barrier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347233A (en) * | 2018-12-19 | 2019-02-15 | 上海特波电机有限公司 | Permanent-magnetic synchronous motor rotor with air magnetic barrier |
| CN110460185A (en) * | 2019-09-12 | 2019-11-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor and motor |
| CN110556946A (en) * | 2019-10-12 | 2019-12-10 | 哈尔滨理工大学 | Permanent magnet auxiliary synchronous reluctance motor rotor device |
-
2018
- 2018-12-19 CN CN201822131667.1U patent/CN209046391U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347233A (en) * | 2018-12-19 | 2019-02-15 | 上海特波电机有限公司 | Permanent-magnetic synchronous motor rotor with air magnetic barrier |
| CN110460185A (en) * | 2019-09-12 | 2019-11-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor and motor |
| CN110460185B (en) * | 2019-09-12 | 2021-10-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and motor |
| CN110556946A (en) * | 2019-10-12 | 2019-12-10 | 哈尔滨理工大学 | Permanent magnet auxiliary synchronous reluctance motor rotor device |
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