CN109450209A - Bread formula permanent-magnetic synchronous motor rotor - Google Patents
Bread formula permanent-magnetic synchronous motor rotor Download PDFInfo
- Publication number
- CN109450209A CN109450209A CN201811553374.0A CN201811553374A CN109450209A CN 109450209 A CN109450209 A CN 109450209A CN 201811553374 A CN201811553374 A CN 201811553374A CN 109450209 A CN109450209 A CN 109450209A
- Authority
- CN
- China
- Prior art keywords
- rotor core
- magnetic
- magnetic barrier
- rotor
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 19
- 235000008429 bread Nutrition 0.000 title claims abstract description 11
- 230000004888 barrier function Effects 0.000 claims abstract description 44
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 230000005389 magnetism Effects 0.000 abstract description 7
- 230000004907 flux Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
A kind of bread formula permanent-magnetic synchronous motor rotor, is related to technical field of motors, and the solution is to improve weak magnetism speed expansion ability.The rotor includes rotor core, and it is fixed on multiple surface magnets of rotor core outer peripheral surface, it is protruded along the radially outward arc of rotor core at the middle part of the surface magnet, so that surface magnet is in the radial section of rotor core in the bread-like that thick middle two sides are thin, the rotor core is equipped with multiple magnetic and hinders unit, and each magnetic barrier unit is symmetrically spaced laying around the axle center of rotor core；Each magnetic barrier unit is made of two magnetic barrier slots, and two magnetic barrier slots are the arc line shaped slot protruded to inner arc, and the radius of two magnetic barrier slots is different, and two magnetic barrier slots are laid with one heart.Rotor provided by the invention can improve motor dynamics performance.
Description
Technical field
The present invention relates to motor technologies, more particularly to a kind of technology of bread formula permanent-magnetic synchronous motor rotor.
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.
Summary of the invention
For above-mentioned defect existing in the prior art, technical problem to be solved by the invention is to provide a kind of expansions of weak magnetic
The good bread formula permanent-magnetic synchronous motor rotor of fast ability.
In order to solve the above-mentioned technical problem, a kind of bread formula permanent-magnetic synchronous motor rotor provided by the present invention, including turn
Sub- iron core, and multiple surface magnets of rotor core outer peripheral surface are fixed on, each surface magnet surrounds the axle center pair of rotor core
Interval is claimed to lay；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；
The rotor core is equipped with multiple magnetic and hinders unit, and the quantity of magnetic barrier unit is consistent with the quantity of surface magnet, respectively
A magnetic barrier unit is symmetrically spaced laying around the axle center of rotor core；
Each magnetic barrier unit is made of two magnetic barrier slots, and two magnetic barrier slots are the arc line shaped slot protruded to inner arc,
And the radius of two magnetic barrier slots is different, and two magnetic barrier slots are laid with one heart, and magnetic is hindered unit by the quadrature axis of rotor core
It is divided into symmetrical two halves.
Further, two magnetic barrier slot in the magnetic barrier unit is respectively outer magnetic barrier slot, interior magnetic barrier slot, if outer magnetic hinders slot
It is h1 in the width of rotor core radially, interior magnetic barrier slot is h2 in the width of rotor core radially, and surface magnet is in rotor
At iron core d-axis with a thickness of hm, then have (h1+h2) > hm.
Bread formula permanent-magnetic synchronous motor rotor provided by the invention passes through the surface magnet and the double-deck concentric arcs of bread-like
Air-gap flux barrier, which is constituted, increases magnetic-type structure, overcomes existing surface-mounted permanent magnet synchronous motor electricity synchronous with built-in type permanent-magnet
The disadvantage of machine rises by increasing the magnetic flux of magnetoelectricity stream+Id auxiliary surface magnet and increases magnetic action, can reduce surface magnet demagnetization wind
Danger, can be reduced the volume, weight, cost of surface magnet, so as to reduce rotor centrifugal force, improves weak magnetism speed expansion ability, expands
The operation of invariable power range.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the bread formula permanent-magnetic synchronous motor rotor of the embodiment of the present invention；
Fig. 2 is the motor of existing cross, straight axle inductance equal (Ld=Lq) and the torque/speed characteristic curve of the embodiment of the present invention
Figure.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with Detailed description of the invention, but the present embodiment is not used to limit
The system present invention, all that protection scope of the present invention should all be included in using similar structure and its similar variation of the invention, present invention
In pause mark indicate the relationship of sum, the English alphabet in the present invention is case sensitive.
As shown in Figure 1, a kind of bread formula permanent-magnetic synchronous motor rotor provided by the embodiment of the present invention, including rotor core
1, and multiple surface magnets 2 of rotor core outer peripheral surface are fixed on, between each surface magnet is symmetrical around the axle center of rotor core
Every laying；
The middle part of the surface magnet 2 is protruded along the radially outward arc of rotor core 1, so that surface magnet 2 is in rotor core
Radial section in the thin bread-like in thick middle two sides, and the d-axis (pole center line, d axis) of rotor core 1 is by surface
Magnet 2 is divided into symmetrical two halves；
The rotor core 1 is equipped with multiple magnetic and hinders unit, and the quantity of magnetic barrier unit is consistent with the quantity of surface magnet 2,
Each magnetic barrier unit is symmetrically spaced laying around the axle center of rotor core 1；
Each magnetic barrier unit is made of two magnetic barrier slots 31,32, and two magnetic barrier slots are inwardly (towards rotor core axis
Heart side is inside) the arc line shaped slot of arc protrusion, the radius of two magnetic barrier slots 31,32 is different, and two magnetic barrier slots are concentric
It lays, constitutes the double-deck concentric arcs air-gap flux barrier, and magnetic is hindered list by the quadrature axis (interpolar center line, q axis) of rotor core
Member is divided into symmetrical two halves；
Two magnetic barrier slot in the magnetic barrier unit is respectively outer magnetic barrier slot 31, interior magnetic barrier slot 32, if outer magnetic hinders slot 31 in rotor
The width of iron core radially is h1, and interior magnetic barrier slot 32 is h2 in the width of rotor core radially, and surface magnet 2 is in rotor core
At d-axis with a thickness of hm, then have (h1+h2) > hm.
The embodiment of the present invention is using the surface magnet of bread-like and the combination of the double-deck concentric arcs air-gap flux barrier come excellent
Change magnetic structure, stop the magnetic flux path of rotor core quadrature axis, increases the effective air gap of rotor core quadrature axis, hand over rotor core
The total gas length of synthesis of axis is greater than the diametrical magnetization thickness of surface magnet, and rotor core quadrature axis (q axis) magnetic resistance Rq is caused to be greater than
Rotor core d-axis (d axis) magnetic resistance Rd(is i.e.: Rq > Rd), and inductance is inversely proportional with magnetic resistance, so that rotor core d-axis inductance is greater than
Rotor core axis inductor (that is: Ld > Lq) forms the increasing magnetic-type structure of Ld > Lq, by increasing the positive d-axis electricity of magnetoelectricity stream+Id(
Stream) obtain reluctance torque, as motor speed increases and reach voltage limit ,+Id is gradually reduced so that Id eventually become-
Id only needs a small amount of-Id to can be obtained good weak magnetism speed expansion ability to further suppress voltage more than rated speed,
The operation of invariable power range can be expanded, loss is effectively reduced, system effectiveness, power density and torque density are improved, with existing table
Panel mounting type permanent magnet synchronous motor is compared, and expansion speed ability improves 1.5-2.0 times.
Fig. 2 is the motor (hereinafter referred to as are as follows: existing motor) and the present invention of existing cross, straight axle inductance equal (Ld=Lq)
The torque/speed Property comparison of embodiment (increasing magnetic-type Ld > Lq), Nn therein is rated speed, and Tn is nominal torque, Tmax
For torque capacity, Nmax1 is the maximum (top) speed of existing motor, and Nmax3 is the maximum (top) speed of the embodiment of the present invention, and S1 is existing electricity
The torque/speed characteristic curve of machine, S3 are the torque/speed characteristic curve of the embodiment of the present invention, and X1 is permanent torque area, and X2 is perseverance
Power area；
From Figure 2 it can be seen that Nmax3 is about 1.52-2.0 times of Nmax1, significantly improve high speed invariable power area expansion speed ability.
Claims (2)
1. a kind of bread formula permanent-magnetic synchronous motor rotor, including rotor core, and it is fixed on multiple tables of rotor core outer peripheral surface
Face magnet, 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；
The rotor core is equipped with multiple magnetic and hinders unit, and the quantity of magnetic barrier unit is consistent with the quantity of surface magnet, respectively
A magnetic barrier unit is symmetrically spaced laying around the axle center of rotor core；
Each magnetic barrier unit is made of two magnetic barrier slots, and two magnetic barrier slots are the arc line shaped slot protruded to inner arc,
And the radius of two magnetic barrier slots is different, and two magnetic barrier slots are laid with one heart, and magnetic is hindered unit by the quadrature axis of rotor core
It is divided into symmetrical two halves.
2. bread formula permanent-magnetic synchronous motor rotor according to claim 1, it is characterised in that: two in the magnetic barrier unit
A magnetic barrier slot is respectively outer magnetic barrier slot, interior magnetic barrier slot, if it is h1 that outer magnetic, which hinders slot in the width of rotor core radially, interior magnetic hinders slot
The width of rotor core radially be h2, surface magnet at rotor core d-axis with a thickness of hm, then have (h1+h2) > hm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553374.0A CN109450209A (en) | 2018-12-19 | 2018-12-19 | Bread formula permanent-magnetic synchronous motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553374.0A CN109450209A (en) | 2018-12-19 | 2018-12-19 | Bread formula permanent-magnetic synchronous motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109450209A true CN109450209A (en) | 2019-03-08 |
Family
ID=65559101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811553374.0A Withdrawn CN109450209A (en) | 2018-12-19 | 2018-12-19 | Bread formula permanent-magnetic synchronous motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109450209A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034616A (en) * | 2019-04-19 | 2019-07-19 | 哈尔滨理工大学 | A kind of magneto-electric coupled damping noise reduction switched reluctance machines structure |
| 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 |
-
2018
- 2018-12-19 CN CN201811553374.0A patent/CN109450209A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034616A (en) * | 2019-04-19 | 2019-07-19 | 哈尔滨理工大学 | A kind of magneto-electric coupled damping noise reduction switched reluctance machines structure |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9748806B2 (en) | Permanent magnet rotating electrical machine and a motor vehicle using same | |
| Hua et al. | Investigation and design of a high-power flux-switching permanent magnet machine for hybrid electric vehicles | |
| US9692265B2 (en) | Variable magnetic flux-type rotary electric machine | |
| Hao et al. | Novel dual-rotor axial field flux-switching permanent magnet machine | |
| CN104578659B (en) | A kind of Magneticflux-switching type hybrid permanent magnet memory electrical machine in parallel | |
| EP2980969A1 (en) | Synchronous reluctance motor and rotor for synchronous reluctance motor | |
| WO2020034637A1 (en) | Built-in hybrid permanent-magnet memory motor having partially parallel magnetic circuits | |
| CN103441592A (en) | Novel magnetic flux adjustable permanent magnet synchronous motor | |
| CN105024508A (en) | Magnetism-increasing decoupling axial-flux switching dual-rotor motor | |
| CN209046391U (en) | Permanent-magnetic synchronous motor rotor with air magnetic barrier | |
| CN105048740A (en) | Permanent magnet and variable reluctance parallel hybrid excitation brushless motor | |
| CN104467333B (en) | Rotor excitation multi-phase reluctance motor and control method thereof | |
| CN105914984A (en) | Various magnetic flux-strong magnetic type permanent magnet synchronous motor | |
| CN109450209A (en) | Bread formula permanent-magnetic synchronous motor rotor | |
| CN110350689A (en) | Composite permanent magnet motor | |
| JP2012257426A (en) | Rotor of rotary electric machine | |
| CN209170077U (en) | Tile type permanent magnet synchronous motor | |
| CN109873511B (en) | Inverse salient pole type tangential magnetizing multiphase permanent magnet fault-tolerant motor | |
| CN109713868B (en) | Axial parallel multiphase permanent magnet fault-tolerant motor | |
| CN104767336A (en) | Single-phase separately-excited magneto-resistive power generator | |
| CN102158033A (en) | Wide speed-regulation permanent-magnet synchronous motor | |
| CN109347233A (en) | Permanent-magnetic synchronous motor rotor with air magnetic barrier | |
| CN209642518U (en) | Bread formula permanent-magnetic synchronous motor rotor | |
| CN110460185A (en) | Rotor and motor | |
| CN110336438A (en) | V-type segmented composite magnetoelectric machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190308 |