CN105914925A - High-torque-density permanent magnet reluctance synchronous motor rotor structure - Google Patents
High-torque-density permanent magnet reluctance synchronous motor rotor structure Download PDFInfo
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- CN105914925A CN105914925A CN201610330976.4A CN201610330976A CN105914925A CN 105914925 A CN105914925 A CN 105914925A CN 201610330976 A CN201610330976 A CN 201610330976A CN 105914925 A CN105914925 A CN 105914925A
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a high-torque-density permanent magnet reluctance synchronous motor rotor structure, which comprises a central rotating shaft and a rotor core, wherein P groups of through slots are evenly formed in the rotor core along the circumferential direction, each group of through slots includes three layers of U-shaped through slots formed along a radial direction of the rotor core at intervals, and a permanent magnet is embedded in each of two wings of the middle U-shaped through slot; and the middle U-shaped through slot among the three layers of U-shaped through slots is of a symmetric structure, and the outer-layer and inner-layer U-shaped through slots are each of asymmetric structure. The high-torque-density permanent magnet reluctance synchronous motor rotor structure can change torque characteristics of a built-in permanent magnet synchronous motor, makes the maximum synthesized torque fully utilize a permanent-magnet torque component and a reluctance torque component, and increases torque density of a motor.
Description
Technical field
The present invention relates to a kind of high torque density permanent-magnet magnetic resistance synchronous motor rotor structure, belong to magneto technology.
Background technology
Permanent magnet is distributed in permanent-magnetic synchronous motor rotor according to certain rules, and the magnetic flux that permanent magnet provides substitutes electrical excitation and synchronizes
The Exciting Windings for Transverse Differential Protection excitation of motor sets up main field.And according to the difference of rotor magnetic circuit structural, surface-type and built-in can be divided into.
The permanent magnet of built-in rotor magnetic structure is positioned at inside rotor core, and its rotor magnetic circuit structural belongs to salient-pole structure, electromagnetism
Torque also has in addition to permanent-magnet torque component reluctance torque component.
According to the torque characteristics of conventional internal formula permagnetic synchronous motor, permanent-magnet torque component maximum is 0 degree at current angle
Time reach, reluctance torque component maximum reaches when current angle is 45 degree, and synthesizes torque and reach the electricity of maximum
Stream angle is between 0 degree to 45 degree, and synthesis torque capacity underuses two kinds of torque components.Synthesis torque maximum value
It is less than the algebraical sum of permanent-magnet torque maximum and reluctance torque maximum, causes permanent-magnet torque component and divide with reluctance torque
Insufficient utilization of amount.
In the application scenario that volume requirement is higher, high torque density becomes the important indicator that design of electrical motor is pursued, this requirement
Various torque components can sufficiently be utilized by motor.
Summary of the invention
Goal of the invention: in order to overcome two kinds of torque components present in prior art to utilize insufficient shortcoming, the present invention carries
For a kind of high torque density permanent-magnet magnetic resistance synchronous motor rotor structure, it is possible to more fully utilize permanent-magnet torque component and magnetic
Resistive torque component, thus improve the torque density of motor.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
In rotor core, use asymmetric U-shaped groove structure, make permanent-magnet torque characteristic move to right, reluctance torque characteristic simultaneously
Move to left, permanent-magnet torque and reluctance torque can be made to reach maximum at same current angle or close current angle, improve
The synthesis torque utilization rate to two kinds of torque components.
A kind of high torque density permanent-magnet magnetic resistance synchronous motor rotor structure, including central rotating shaft and rotor core, central rotating shaft
Axis concentricity with rotor core is installed；Around central axis, rotor core is evenly arranged with P physical dimension phase
Same groove group, along clockwise direction, the numbering of groove group is designated as 1,2 successively, i, P-1, P, wherein P
Number of magnetic poles for motor；
Each groove group includes that three U-shaped grooves, each U-shaped groove include a straight bottom and two front wings, three
Individual straight bottom is parallel to each other；According to the distance of straight bottom distance center axis, three U-shaped grooves are called outer layer U
Shape groove, middle U-shaped groove and internal layer U-shaped groove, middle U-shaped groove is symmetrical structure, internal layer U-shaped groove
The width of straight bottom and the front wing is respectively h1And q1, the straight bottom of middle U-shaped groove and the width of the front wing are respectively
h2And q2, the straight bottom of outer layer U-shaped groove and the width of the front wing are respectively h3And q3, h1<h2<h3,
0.5h1≤q1≤1.5h1, 0.5h2≤q2≤1.5h2, 0.5h3≤q3≤1.5h3；
It is equipped with a permanent magnet, a length of l of permanent magnet in two front wings of middle U-shaped groovepm, forever
The width of magnet is wpm；Two permanent magnet polarities in same middle U-shaped groove are identical, U-shaped in the middle of adjacent two
Permanent magnet polarity in groove is different；
Other sizes of groove group are stated with the centrage of U-shaped groove；The cross section of rotor core is set up xy
Two-dimensional coordinate system, the initial point of xy two-dimensional coordinate system is on central axis；Three straight bottom of the 1st groove group are all and y-axis
Vertically, and the midpoint of three straight bottom is the most on the y axis, and the axis of symmetry of middle U-shaped groove overlaps with y-axis；1st leads to
6 front tip extension of groove group and rotor core cylindrical are b in the distance of radial direction；Two of middle U-shaped groove
Front tip extension is α with the line of initial point and the angle of y-axis0,A left side for internal layer U-shaped groove is straight
Flank end is α with the line of initial point and the angle of y-axis3, 0 °≤α3＜ α0；The right front wing tip of internal layer U-shaped groove
Portion is α with the line of initial point and the angle of y-axis4, α3＜ α4And α3+α4＜ 2 α0；The left front of outer layer U-shaped groove
Tip extension is α with the line of initial point and the angle of y-axis1,The right front of outer layer U-shaped groove
Tip extension is α with the line of initial point and the angle of y-axis2, α1＜ α2AndAt outer layer U-shaped groove
Two front wings on a magnetic bridge that can turn on magnetic flux is respectively set, the spacing of two magnetic bridges is w,The distance of the centre distance initial point of two magnetic bridges is equal；
In order to reach the purpose of high torque density, direction of rotation when above-mentioned rotor uses is the left hand direction (left side with y-axis
The definition target on right side is consistent).
Preferably, two front wings of middle U-shaped groove fill the width of permanent magnet position more than being unkitted permanent magnet position
Width, i.e. arranges step groove structure on the front wing of middle U-shaped groove, realizes permanent magnet by step groove structure and turns
The location of sub-iron core；It is typically designed the width ratio of dress permanent magnet position on two front wings of middle U-shaped groove and is unkitted permanent magnetism
The biggest 0.5mm of width of body position.
Preferably, in order to keep the integrity of rotor punching and for turning on magnetic flux, design 0.5mm≤b.
The present invention utilizes the structure of asymmetric U-shaped groove structure, it is possible to change the torque characteristics of permanent-magnet magnetic resistance synchronous motor,
Making permanent-magnet torque characteristic move to right, reluctance torque characteristic moves to left.
Beneficial effect: the high torque density permanent-magnet magnetic resistance synchronous motor rotor structure that the present invention provides, has the advantage that
1, by asymmetric U-shaped groove structure, make the maximum synthesis torque of permanent-magnet magnetic resistance synchronous motor make full use of permanent magnetism and turn
Square component and reluctance torque component, improve torque density；2, the rotor structure that the present invention proposes takes full advantage of magnetic resistance
Torque, it is possible to reduce the consumption of permanent magnet material, reduces motor manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of rotor punching；
Fig. 3 is the structural representation of a groove group；
Figure includes: 1-central rotating shaft, 2-rotor core, 3-groove group, 4-outer layer U-shaped groove, and in the middle of 5-, U-shaped leads to
Groove, 6-internal layer U-shaped groove, 7-permanent magnet, 8-step groove structure.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
It is illustrated in figure 1 a kind of high torque density permanent-magnet magnetic resistance synchronous motor rotor structure, including central rotating shaft 1 and rotor
Iron core 2 (being overrided to form by rotor punching), central rotating shaft 1 is installed with the concentricity axis of rotor core 2；Around central shaft
Line, is evenly arranged with P the identical groove group 3 of physical dimension, along clockwise direction, groove group on rotor core 2
The numbering of 3 is designated as 1,2 successively, i, P-1, P, wherein P is the number of magnetic poles of motor；Two adjacent groups groove group
The angle of 3 centreline spaces is
As in figure 2 it is shown, each groove group 3 include three U-shaped grooves, each U-shaped groove include a straight bottom and
Two front wings, three straight bottom are parallel to each other；According to the distance of straight bottom distance center axis, by three U-shaped grooves
Being called outer layer U-shaped groove 4, middle U-shaped groove 5 and internal layer U-shaped groove 6, middle U-shaped groove 5 is right
Claiming structure, outer layer U-shaped groove 4 and internal layer U-shaped groove 6 are unsymmetric structure；The straight bottom of internal layer U-shaped groove 6
It is respectively h with the width of the front wing1And q1, the middle straight bottom of U-shaped groove 5 and the width of the front wing are respectively h2With
q2, the straight bottom of outer layer U-shaped groove 4 and the width of the front wing are respectively h3And q3, h1<h2<h3, 0.5h1≤q1≤1.5h1,
0.5h2≤q2≤1.5h2, 0.5h3≤q3≤1.5h3。
It is equipped with a permanent magnet 7, a length of l of permanent magnet 7 in two front wings of middle U-shaped groove 5pm,
The width of permanent magnet 7 is wpm；Two permanent magnet 7 polarity in same middle U-shaped groove 5 are identical, adjacent two
Permanent magnet 7 polarity in middle U-shaped groove 5 is different.Permanent magnet 7 is filled on two front wings of middle U-shaped groove 5
The width of position is more than the width being unkitted permanent magnet 7 position, i.e. arranges step groove on the front wing of middle U-shaped groove 5
Structure 8, realizes permanent magnet 7 and the location of rotor core 2 by step groove structure 8；It is typically designed middle U-shaped groove
The width ratio filling permanent magnet position on two front wings of 5 is unkitted the biggest 0.5mm of width of permanent magnet position.
As it is shown on figure 3, other sizes of groove group 3 are stated with the centrage of U-shaped groove；At rotor core 2
Cross section on set up xy two-dimensional coordinate system, the initial point of xy two-dimensional coordinate system is on central axis；1st groove group 3
Three straight bottom all vertical with y-axis, and the midpoint of three straight bottom is the most on the y axis, the symmetry of middle U-shaped groove 5
Axle overlaps with y-axis；6 front tip extension of the 1st groove group 3 and rotor core 2 cylindrical are in the distance of radial direction
It is b；Middle two front tip extension of U-shaped groove 5 are α with the angle of the line of initial point and y-axis0,The left front tip extension of internal layer U-shaped groove 6 is α with the angle of the line of initial point and y-axis3,
0°≤α3＜ α0；The right front tip extension of internal layer U-shaped groove 6 is α with the angle of the line of initial point and y-axis4, α3＜ α4
And α3+α4＜ 2 α0；The left front tip extension of outer layer U-shaped groove 4 is α with the angle of the line of initial point and y-axis1,The right front tip extension of outer layer U-shaped groove 4 is α with the angle of the line of initial point and y-axis2,
α1＜ α2AndTwo front wings of outer layer U-shaped groove 4 respectively arrange one and can turn on magnetic flux
Magnetic bridge, the spacing of two magnetic bridges is w,The distance of the centre distance initial point of two magnetic bridges is equal.
Below by an embodiment, the present invention is specifically described.
Rotor overall structure figure as shown in Figure 1, the present embodiment is the permanent-magnet magnetic resistance synchronous electric motor rotor of 4 poles,
P=4.For rotor punching structure figure as shown in Figure 2, a length of l of permanent magnetpm=10.4mm, the width of permanent magnet is wpm
=2.6mm, the axial length of rotor core entirety is 60mm；The structure chart of a groove group as shown in Figure 3, middle U
The front tip extension of shape groove is α with the angle of the line of initial point and y-axis0=25 °, meetOuter layer U
The left front tip extension of shape groove is α with the angle of the line of initial point and y-axis1=33 °, the right front of outer layer U-shaped groove
Tip extension is α with the line of initial point and the angle of y-axis2=49 °, meetα1＜ α2,The left front tip extension of internal layer U-shaped groove is α with the angle of the line of initial point and y-axis3=8 °,
Meet 0 °≤α3＜ α0, the right front tip extension of internal layer U-shaped groove 6 is α with the angle of the line of initial point and y-axis4
=14 °, meet α3＜ α4And α3+α4＜ 2 α0.The straight bottom of internal layer U-shaped groove and the width of the front wing are respectively h1
=3.3mm and q1=2.7mm, the middle straight bottom of U-shaped groove and the width of the front wing are respectively h2=2.3mm and q2
=2.4mm, the straight bottom of outer layer U-shaped groove and the width of the front wing are respectively h3=1.8mm and q3=1.8mm, meets h1
<h2<h3, and 0.5～1.5 times that front wing width is respective straight base width.Front tip extension and rotor core 2 cylindrical
Distance at radial direction is b=0.6mm > 0.5mm.The spacing of magnetic bridge is w=1mm, meetsFinal rotor structure is as shown in Figure 1.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also
Should be regarded as protection scope of the present invention.
Claims (3)
1. a high torque density permanent-magnet magnetic resistance synchronous motor rotor structure, it is characterised in that: include central rotating shaft (1)
With rotor core (2), central rotating shaft (1) is installed with rotor core (2) concentricity axis；Around central axis,
P the identical groove group (3) of physical dimension, along clockwise direction, groove group it is evenly arranged with on rotor core (2)
(3) numbering is designated as 1,2 successively ..., i ..., P-1, P, wherein P is the number of magnetic poles of motor；
Each groove group (3) includes that three U-shaped grooves, each U-shaped groove include a straight bottom and two front wings,
Three straight bottom are parallel to each other；According to the distance of straight bottom distance center axis, three U-shaped grooves are called outer layer
U-shaped groove (4), middle U-shaped groove (5) and internal layer U-shaped groove (6), middle U-shaped groove (5) is symmetrical
Structure, outer layer U-shaped groove (4) and internal layer U-shaped groove (6) are unsymmetric structure；Internal layer U-shaped groove (6)
The width of straight bottom and the front wing is respectively h1And q1, the middle straight bottom of U-shaped groove (5) and the width of the front wing divide
Wei h2And q2, the straight bottom of outer layer U-shaped groove (4) and the width of the front wing are respectively h3And q3, h1<h2<h3,
0.5h1≤q1≤1.5h1, 0.5h2≤q2≤1.5h2, 0.5h3≤q3≤1.5h3；
It is equipped with a permanent magnet (7) in two front wings of middle U-shaped groove (5), permanent magnet (7)
A length of lpm, the width of permanent magnet (7) is wpm；Two permanent magnets (7) in same middle U-shaped groove (5)
Polarity is identical, and in the middle of adjacent two, permanent magnet (7) polarity in U-shaped groove (5) is different；
Other sizes of groove group (3) are stated with the centrage of U-shaped groove；Cross section in rotor core (2)
On set up xy two-dimensional coordinate system, the initial point of xy two-dimensional coordinate system is on central axis；Three of 1st groove group (3)
Straight bottom is all vertical with y-axis, and the midpoint of three straight bottom is the most on the y axis, the axis of symmetry of middle U-shaped groove (5)
Overlapping with y-axis, 6 front tip extension of the 1st groove group (3) and rotor core (2) cylindrical are at radial direction
Distance is b；Middle two front tip extension of U-shaped groove (5) are α with the angle of the line of initial point and y-axis0,The left front tip extension of internal layer U-shaped groove (6) is α with the angle of the line of initial point and y-axis3,
0°≤α3＜ α0；The right front tip extension of internal layer U-shaped groove (6) is α with the angle of the line of initial point and y-axis4,
α3＜ α4And α3+α4＜ 2 α0；The left front tip extension of outer layer U-shaped groove (4) and the line of initial point and the folder of y-axis
Angle is α1,The right front tip extension of outer layer U-shaped groove (4) and the line of initial point and y-axis
Angle be α2, α1＜ α2AndTwo front wings of outer layer U-shaped groove (4) are respectively arranged
One magnetic bridge that can turn on magnetic flux, the spacing of two magnetic bridges is w,The centre-to-centre spacing of two magnetic bridges
Equal from the distance of initial point.
High torque density permanent-magnet magnetic resistance synchronous motor rotor structure the most according to claim 1, it is characterised in that:
The width of permanent magnet (7) position is filled more than being unkitted permanent magnet (7) position on two front wings of middle U-shaped groove (5)
The width put, i.e. arranges step groove structure (8), by step groove structure on the front wing of middle U-shaped groove (5)
(8) permanent magnet (7) and the location of rotor core (2) are realized.
High torque density permanent-magnet magnetic resistance synchronous motor rotor structure the most according to claim 1, it is characterised in that:
In order to keep the integrity of rotor punching and for turning on magnetic flux, design 0.5mm≤b.
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| EP3300231A1 (en) * | 2016-09-22 | 2018-03-28 | General Electric Company | Electric machine |
| CN107872136A (en) * | 2016-09-22 | 2018-04-03 | 通用电气公司 | Motor |
| CN107872136B (en) * | 2016-09-22 | 2021-05-04 | 通用电气公司 | Electric machine |
| US10256708B2 (en) | 2016-09-22 | 2019-04-09 | General Electric Company | Electric machine |
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| CN108321952B (en) * | 2018-03-16 | 2020-10-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
| CN108336841A (en) * | 2018-05-03 | 2018-07-27 | 杭州瑞拉腾电气科技有限公司 | A kind of rotor for synchronous magnetic resistance motor |
| WO2019210855A1 (en) * | 2018-05-03 | 2019-11-07 | 杭州瑞拉腾电气科技有限公司 | Rotor for synchronous reluctance machine |
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| US11418072B2 (en) | 2018-05-08 | 2022-08-16 | Gree Electric Appliances, Inc. Of Zhuhai | Permanent magnet assisted synchronous reluctance motor and electric car having the same |
| WO2020020580A1 (en) * | 2018-07-24 | 2020-01-30 | IFP Energies Nouvelles | Rotor for an electrical machine, having asymmetric poles |
| CN109672286A (en) * | 2018-12-06 | 2019-04-23 | 东南大学 | A kind of asymmetry magnetic barrier formula permanent-magnet magnetic resistance synchronous motor rotor structure |
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| CN109802504B (en) * | 2019-04-04 | 2023-12-08 | 山东大学 | Permanent magnet magnetic-gathering type synchronous reluctance motor and asymmetric rotor thereof |
| CN110994837A (en) * | 2019-12-09 | 2020-04-10 | 珠海格力电器股份有限公司 | Motor rotor, reluctance motor and electric automobile |
| CN113131643A (en) * | 2019-12-30 | 2021-07-16 | 安徽威灵汽车部件有限公司 | Rotor of motor, driving motor and vehicle |
| CN113131643B (en) * | 2019-12-30 | 2022-12-02 | 安徽威灵汽车部件有限公司 | Rotor of motor, driving motor and vehicle |
| CN113131642A (en) * | 2019-12-30 | 2021-07-16 | 安徽威灵汽车部件有限公司 | Rotor of motor, driving motor and vehicle |
| US12003140B2 (en) | 2019-12-30 | 2024-06-04 | Anhui Welling Auto Parts Co., Ltd. | Rotor for motor, drive motor and vehicle |
| CN113410931A (en) * | 2020-03-16 | 2021-09-17 | 安徽威灵汽车部件有限公司 | Rotor of motor, motor and vehicle |
| WO2024078113A1 (en) * | 2022-10-14 | 2024-04-18 | 广东美芝制冷设备有限公司 | Permanent magnet-assisted synchronous reluctance motor and compressor |
| CN115498841A (en) * | 2022-11-15 | 2022-12-20 | 中山大洋电机股份有限公司 | Disc type motor with high torque density |
| CN116885869A (en) * | 2023-05-16 | 2023-10-13 | 山东理工大学 | Equidirectional offset type multilayer irregular permanent magnet pole motor |
| CN116742856B (en) * | 2023-07-03 | 2024-05-31 | 山东理工大学 | Magnetic field distribution adjustable motor with arc-shaped magnetic barriers |
| CN116742856A (en) * | 2023-07-03 | 2023-09-12 | 山东理工大学 | Magnetic field distribution adjustable motor with arc-shaped magnetic barriers |
| CN117040156A (en) * | 2023-07-18 | 2023-11-10 | 山东理工大学 | Asymmetric interior permanent magnet motor with radial magnetic barrier |
| CN117040156B (en) * | 2023-07-18 | 2024-05-03 | 山东理工大学 | Asymmetric interior permanent magnet motor with radial magnetic barrier |
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