CN106549521A - A kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure - Google Patents
A kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure Download PDFInfo
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- CN106549521A CN106549521A CN201611197581.8A CN201611197581A CN106549521A CN 106549521 A CN106549521 A CN 106549521A CN 201611197581 A CN201611197581 A CN 201611197581A CN 106549521 A CN106549521 A CN 106549521A
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- shaped groove
- permanent magnet
- shaped
- rotor core
- groove
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure, including central rotating shaft and rotor core, circumferentially surface is evenly arranged with 2P group grooves to rotor core, permanent magnet is provided with every group of groove, rotor core is along the circumferential direction evenly arranged with 2P group grooves, and every group of groove is included along rotor core spaced two-layer U-shaped groove in the radial direction.The present invention can make full use of the permanent-magnet torque that permanent magnet is produced, and be lifted motor torque density with reference to reluctance torque.
Description
Technical field
The present invention relates to a kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure, belongs to magneto skill
Art.
Background technology
Magneto has the advantages that high efficiency, high power density and controllability are good, be widely used to commercial production and
In daily life.Conventional permanent magnet motor generally adopts id=0 control, not using reluctance torque, causes reluctance torque point
The waste of amount.Although using peak power electric current than controlling during conventional permanent magnet motor while make use of permanent-magnet torque component and magnetic resistance
Torque component, but both do not reach maximum simultaneously in synthesis torque maximum value, and a certain degree of wave is still caused to torque
Take.
Harsh and to the strict control of cost occasion is being required to motor volume, the torque density for improving motor seems particularly
It is crucial.Under equal volume index, make full use of various torque components effectively improve the output torque of motor, increase motor
Torque density, so as to reach the target of save space and energy-conservation.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention to provide a kind of high torque density surface-mount type
Permanent-magnet magnetic resistance synchronous motor rotor structure, can make full use of permanent-magnet torque component and reluctance torque component, improve turning for motor
Square density.
Technical scheme：For achieving the above object, the technical solution used in the present invention is：
A kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure, including central rotating shaft, rotor core and
Permanent magnet, and the scalloped recess that the U-shaped groove group that arranges in rotor core and rotor core surface are arranged；In U-shaped groove
Inside it is provided with for turning on the magnetic bridge of magnetic flux.
Further, the scalloped recess quantity that the U-shaped groove group and rotor core surface are arranged is respectively 2P groups, and edge
Rotor core circumference is uniformly distributed clockwise, magnetic pole logarithms of the wherein P for motor；
Each groove group includes two U-shaped grooves, and each U-shaped groove includes a straight bottom and two symmetrical fronts
The wing, two straight bottoms are parallel to each other；According to the distance of straight bottom distance center rotating shaft, two U-shaped grooves are referred to as into internal layer U
Shape groove and outer layer U-shaped groove；
Xy two-dimensional coordinate systems are set up on the cross section of rotor core, the origin of xy two-dimensional coordinate systems is in central rotating shaft
On heart axis, two straight bottoms of the 1st groove group are vertical with y-axis, and the midpoint of straight bottom is on the y axis, x-axis and y-axis
Angle be
In one U-shaped groove, the line of internal layer U-shaped groove front wing center thread end and zero with y-axis angle is
αin,The line of outer layer U-shaped groove front wing center thread end and zero with y-axis angle is
αout,The front wing centrage of internal layer U-shaped groove and outer layer U-shaped groove is α with y-axis angle,Outward
Layer U-shaped groove front tip extension is semicircle, and round diameter is q2；The internal layer U-shaped groove end is sector, its fan-shaped curvature
Center is identical with the rotor core center of circle；The width of the straight bottom and the front wing of internal layer U-shaped groove is respectively h1And q1, outer layer U-shaped lead to
The width of the straight bottom and the front wing of groove is respectively h2And q2, h2<h1, 0.5h1≤q1≤h1, 0.5h2≤q2≤h2；U-shaped groove
The distance of 4 front wing center thread ends and rotor core outer rim in radial direction, and two front foilbases of internal layer U-shaped groove
B, b >=0.5mm are with a distance from scalloped recess two ends.
Further, rotor core cylindrical setting of the scalloped recess along correspondence U-shaped groove, the radial direction of the scalloped recess
Thickness is lPM, scalloped recess midpoint be located at y-axis on, the scalloped recess bottom circular arc center of circle be zero, each scalloped recess institute
Central angle is accounted for for θair,Two end line of scalloped recess is α with the angle of y-axisair,
Further, the permanent magnet is the fan-shaped permanent magnet being arranged in the scalloped recess, the fan-shaped permanent magnet
The center of circle is zero, and central angle shared by fan-shaped permanent magnet is θPM,Radially thickness is l to fan-shaped permanent magnetPM, fan
Shape permanent magnet right-hand member place radial line is α with y-axis angle anglepm,Permanent magnet radially magnetizes, adjacent permanent magnet
Opposite polarity.
Further, the magnetic bridge is respectively arranged on two front wings of outer layer U-shaped groove straight bottom and internal layer U-shaped groove；
The magnetic bridge of outer layer U-shaped groove is arranged on straight bottom midpoint, and the magnetic bridge width is w2,Its
Middle r be rotor diameter, BrFor permanent magnet residual magnetism, BbhFor core material saturation flux density value, K2For outer layer magnetic bridge spread factor,
Its span is 0.7≤K2≤ 1, KpmFor Operating Point of Permanent Magnet coefficient, its span is 0.8≤Kpm≤1；Internal layer U-shaped leads to
The magnetic bridge of groove is separately positioned on two front wings, and the magnetic bridge width is w1, w1=K1w2, K1For internal layer magnetic bridge spread factor, its
Span is 1≤K1≤ 1.5, the magnetic bridge on the internal layer U-shaped groove front wing is l with the distance of front wing center thread endrib,
Its span is lrib>lpm。
Beneficial effect：The high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure that the present invention is provided, with such as
Lower advantage：
1st, by iron core surface and internal setting groove and groove so that magnetic resistance of motor torque increases, by control forever
Magnet riding position causes permanent-magnet torque to be superimposed with reluctance torque maximum, improves the torque density of motor.
2nd, rotor structure proposed by the present invention takes full advantage of reluctance torque and permanent-magnet torque, can reduce motor volume,
Core material and permanent magnetism consumption are reduced, the manufacturing cost of motor is reduced.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Structural representations of the Fig. 2 for rotor punching；
Fig. 3 is the structural representation of a groove group；
Figure includes：1- central rotating shafts, 2- rotor cores, 3- permanent magnets, 4-U shape groove groups, 5- scalloped recess, 6- magnetic
Bridge, 7- internal layer U-shaped grooves, 8- outer layer U-shaped grooves.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is done and is further explained.
It is illustrated in figure 1 a kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure, including central rotating shaft
1, rotor core 2 and permanent magnet 3.U-shaped groove group 4 is provided with rotor core, rotor core surface is provided with scalloped recess
5, the magnetic bridge 6 of specified width, which width is provided with U-shaped groove 4, for turning on magnetic flux.
Total 2P groups U-shaped groove group 4 and scalloped recess 5, physical dimension it is identical and along 2 circumference of rotor core clockwise
It is uniformly distributed, its numbering is designated as 1,2 successively, i, the magnetic pole logarithm of 2P-1,2P, wherein P for motor.
Each groove group 4 includes two U-shaped grooves, and each U-shaped groove includes a straight bottom and two symmetrical fronts
The wing, two straight bottoms are parallel to each other.According to the distance of straight bottom distance center axis, two U-shaped grooves are referred to as into internal layer U
Shape groove 7 and outer layer U-shaped groove 8.
To further describe, as shown in Fig. 2 xy two-dimensional coordinate systems are set up on the cross section of rotor core 2, xy two dimensions are sat
The origin of mark system is on the central axis of central rotating shaft 1；Two straight bottoms of the 1st groove group are vertical with y-axis, and straight bottom
Midpoint on the y axis, x-axis with the angle of y-axis is
Every group of U-shaped groove physical dimension is identical, so be illustrated with the 1st group of U-shaped groove group, the 1st groove group
The line of 7 front wing center thread end of internal layer U-shaped groove and zero and y-axis angle are αin,
By limiting αinAngle, it is ensured that two front wing tip clans of the U-shaped groove of internal layer 7 central angle shared by scalloped recess with
Outward, so as to reach limit leakage field purpose.
The line of 8 front wing center thread end of outer layer U-shaped groove and zero and y-axis angle are α out,
By limiting αoutAngle, permanent magnet flux path can be improved, the determination for magnetic bridge width provides basic condition；Internal layer U-shaped leads to
The front wing centrage of groove 7 and outer layer U-shaped groove 8 and y-axis angle are α,
As shown in figure 3,8 front tip extension of outer layer U-shaped groove is semicircle, round diameter is q2；Internal layer U-shaped groove 7
The width of straight bottom and the front wing is respectively h1And q1, the width of the straight bottom and the front wing of outer layer U-shaped groove 8 is respectively h2With
q2, h2<h1, 0.5h1≤q1≤h1, 0.5h2≤q2≤h2。
Distance of the 4 front wing center thread ends and rotor core outer rim of U-shaped groove 4 in radial direction, and internal layer U
7 two front foilbases of shape groove are b with a distance from 5 two ends of scalloped recess, in order to keep the integrity of rotor punching and be used for
Conducting magnetic flux, designs 0.5mm≤b.The distance of U-shaped groove and rotor core outer is limited, the target for limiting leakage field is reached, in order to
Effect is reached preferably, the internal layer U-shaped groove end sector center of curvature is identical with the rotor core center of circle, and outer layer U-shaped groove is arranged
For semicircle, reduce the impact to permanent magnet flux path while leakage field is limited.
As shown in Figure 2 and Figure 3, the 1st 2 part of groove group place rotor core is provided with thickness for l along cylindricalPMIt is fan-shaped recessed
Groove 5, for laying permanent magnet 3,5 midpoint of scalloped recess is located in y-axis, and central angle shared by 5 bottom circular arc of scalloped recess is θair,5 liang of end lines of scalloped recess are α with the angle of y-axisair,By controlling θairWith αairSo that it is fan-shaped
Groove ends leave certain air gap with permanent magnet, for limiting leakage field.
As shown in Figure 2 and Figure 3, permanent magnet 3 is fan-shaped permanent magnet, wherein the fan-shaped center of circle is zero, fan-shaped shared circle
Heart angle is θPM,Radially thickness is l to permanent magnet 3PM, 3 right-hand member place radial line of permanent magnet with y-axis angle angle is
αpm,Permanent magnet 3 radially magnetizes, the opposite polarity of adjacent permanent magnet 3.
As shown in figure 3, arranging magnetic on two front wings of 8 straight bottom of outer layer U-shaped groove and internal layer U-shaped groove 7 respectively
Bridge 6,8 straight bottom midpoint of outer layer U-shaped groove arrange a magnetic bridge that can turn on magnetic flux, and the magnetic bridge width is w2,Wherein r is rotor diameter, and unit is millimeter mm, BrFor permanent magnet residual magnetism, unit is
Tesla T, BbhFor core material saturation flux density value, unit is tesla T, K2For outer layer magnetic bridge spread factor, its value
Scope is 0.7≤K2≤ 1, KpmFor Operating Point of Permanent Magnet coefficient, its span is 0.8≤Kpm≤1；Internal layer U-shaped groove 7 two
A magnetic bridge that can turn on magnetic flux is respectively provided with the front wing, the magnetic bridge width is w1, w1=K1w2, K1For internal layer magnetic bridge width system
Number, its span are 1≤K1≤ 1.5, the magnetic bridge on the internal layer U-shaped groove front wing with the distance of front wing center thread end is
lrib, its span is lrib>lpm。
Below by one embodiment, the present invention is specifically described.
Rotor overall structure figure is illustrated in figure 1, the present embodiment is that a permanent-magnet magnetic resistance for there are 2 pairs of magnetic poles is synchronous electric
Machine rotor, P=2.Coordinate system as shown in Figure 2 is set up in rotor cross-section first, angle is 90 ° wherein between xy axles.U-shaped leads to
Groove straight bottom is vertical with y-axis, and midpoint is located at y-axis.
To position U-shaped groove position, wherein the line of internal layer U-shaped groove front wing center thread end and coordinate origin with
Y-axis angle is αin=40 °, meetAnd the outer layer U-shaped groove front wing
Center thread end is α with the line and y-axis angle of coordinate originout=22.5 °, meetTwo grooves
Front wing centrage and y-axis angle be α=45 °,
As shown in figure 3, internal layer, the size of outer layer U-shaped groove are respectively h1=4.25mm, h2=2.83mm, q1=2.9mm,
q2=2mm.Meet h2<h1, 0.5h1≤q1≤h1, 0.5h2≤q2≤h2；4 front wing center thread ends of U-shaped groove and rotor
Distance of the iron core outer rim in radial direction, and two front foilbases of internal layer U-shaped groove are b with a distance from scalloped recess two ends
=0.5mm, meets 0.5mm≤b.
As shown in Fig. 2 rotor core is located in y-axis along cylindrical scalloped recess midpoint, the scalloped recess bottom circular arc center of circle
For zero, shared central angle is θair=67.5 °, meetAnd two end line of scalloped recess is pressed from both sides with y-axis
Angle is αair=45 °, meet
Fan-shaped permanent magnet is laid in scalloped recess, the fan-shaped center of circle is zero, fan-shaped shared central angle is θPM
=22.5 °, meetPermanent magnetism body thickness is lPM=3.5mm, radially magnetizes, the polarity of adjacent permanent magnet
On the contrary.
To provide magnetic flux path, magnetic bridge is set on U-shaped groove, as shown in figure 3, it is w that outer layer U-shaped groove arranges width2
The magnetic bridge of=1.5mm, meetsWherein K2=0.72, meet 0.7≤K2≤ 1, Kpm
=0.85, meet 0.8≤Kpm≤ 1, wherein r=29.5mm, Br=1.25T, Bbh=2T；In two front wings of internal layer U-shaped groove
On be respectively provided with a width for w1The magnetic bridge of=1.8mm, meets w1=K1w2, wherein K1=1.2, meet 1≤K1≤1.5.Most
Whole rotor structure is as shown in figure 1, the structure can make full use of the permanent-magnet torque of permanent magnet generation, and make with reference to reluctance torque
Motor torque density is lifted.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure, it is characterised in that：Including central rotating shaft
(1), rotor core (2) and permanent magnet (3), and U-shaped groove group (4) that arranges in rotor core and rotor core surface set
The scalloped recess (5) put；It is provided with the U-shaped groove (4) for turning on the magnetic bridge (6) of magnetic flux.
2. high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure as claimed in claim 1, it is characterised in that：Institute
Scalloped recess (5) the quantity respectively 2P groups that U-shaped groove group (4) and rotor core (2) surface are arranged are stated, and along rotor core
(2) circumference is uniformly distributed clockwise, magnetic pole logarithms of the wherein P for motor；
Each groove group (4) includes two U-shaped grooves, and each U-shaped groove includes the symmetrical front wing of a straight bottom and two,
Two straight bottoms are parallel to each other；According to the distance of straight bottom distance center rotating shaft (1), two U-shaped grooves are referred to as into internal layer U
Shape groove (7) and outer layer U-shaped groove (8)；
Xy two-dimensional coordinate systems are set up on the cross section of rotor core (2), the origin of xy two-dimensional coordinate systems is in central rotating shaft (1)
On central axis, two straight bottoms of the 1st groove group are vertical with y-axis, and the midpoint of straight bottom is on the y axis, x-axis and y
The angle of axle is
In one U-shaped groove (4), line and the y-axis angle of internal layer U-shaped groove (7) front wing center thread end and zero
For αin,The line of outer layer U-shaped groove (8) front wing center thread end and zero is pressed from both sides with y-axis
Angle is αout,The front wing centrage of internal layer U-shaped groove (7) and outer layer U-shaped groove (8) is α with y-axis angle,Outer layer U-shaped groove (8) front tip extension is semicircle, and round diameter is q2；Internal layer U-shaped groove (7) end is
Sector, its fan-shaped center of curvature are identical with the rotor core center of circle；The width of the straight bottom and the front wing of internal layer U-shaped groove (7) point
Wei not h1And q1, the width of the straight bottom and the front wing of outer layer U-shaped groove (8) is respectively h2And q2, h2<h1, 0.5h1≤q1≤h1,
0.5h2≤q2≤h2；Distance of the 4 front wing center thread ends and rotor core outer rim of U-shaped groove (4) in radial direction, with
And (7) two front foilbases of internal layer U-shaped groove are b, b >=0.5mm with a distance from scalloped recess (5) two ends.
3. high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure as claimed in claim 2, it is characterised in that：Institute
State rotor core (2) cylindrical setting of the scalloped recess (5) along correspondence U-shaped groove (4), the radial thickness of the scalloped recess (5)
For lPM, scalloped recess (5) midpoint be located at y-axis on, scalloped recess (5) the bottom circular arc center of circle be zero, each scalloped recess
(5) central angle shared by is θair,(5) two end line of scalloped recess is α with the angle of y-axisair,
4. high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure as claimed in claim 2 or claim 3, its feature exist
In：The permanent magnet (3) is the fan-shaped permanent magnet that is arranged in the scalloped recess (5), and the center of circle of the fan-shaped permanent magnet is
Zero, central angle shared by fan-shaped permanent magnet are θPM,Radially thickness is l to fan-shaped permanent magnetPM, fan-shaped permanent magnetism
Body right-hand member place radial line is α with y-axis angle anglepm,Permanent magnet (3) radially magnetizes, adjacent permanent magnet (3)
Opposite polarity.
5. high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure as claimed in claim 4, it is characterised in that：Institute
State magnetic bridge (6) to be respectively arranged on two front wings of outer layer U-shaped groove (8) straight bottom and internal layer U-shaped groove (7)；Outer layer U-shaped
The magnetic bridge of groove (8) is arranged on straight bottom midpoint, and the magnetic bridge width is w2,Its
Middle r be rotor diameter, BrFor permanent magnet residual magnetism, BbhFor core material saturation flux density value, K2For outer layer magnetic bridge spread factor,
Its span is 0.7≤K2≤ 1, KpmFor Operating Point of Permanent Magnet coefficient, its span is 0.8≤Kpm≤1；Internal layer U-shaped leads to
The magnetic bridge of groove (7) is separately positioned on two front wings, and the magnetic bridge width is w1, w1=K1w2, K1For internal layer magnetic bridge spread factor,
Its span is 1≤K1≤ 1.5, the magnetic bridge on internal layer U-shaped groove (7) the front wing with the distance of front wing center thread end is
lrib, its span is lrib>lpm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611197581.8A CN106549521B (en) | 2016-12-22 | 2016-12-22 | A kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611197581.8A CN106549521B (en) | 2016-12-22 | 2016-12-22 | A kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure |
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| Publication Number | Publication Date |
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| CN106549521A true CN106549521A (en) | 2017-03-29 |
| CN106549521B CN106549521B (en) | 2018-12-28 |
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| CN201611197581.8A Active CN106549521B (en) | 2016-12-22 | 2016-12-22 | A kind of high torque density durface mounted permanent magnet reluctance-synchronous machine rotor structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712350A (en) * | 2017-01-19 | 2017-05-24 | 扬州市新港电机有限公司 | Surface-mount type double-layer magnetic flux grooved permanent magnet synchronous motor |
| CN108736610A (en) * | 2018-08-09 | 2018-11-02 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000253608A (en) * | 1999-03-03 | 2000-09-14 | Sharp Corp | Brushlfss motor |
| CN102208852A (en) * | 2010-03-30 | 2011-10-05 | 株式会社日立制作所 | Permanent magnet synchronous machine, and pressing or extrusion machine including permanent magnet synchronous machine |
| CN105830310A (en) * | 2014-01-22 | 2016-08-03 | 日本精工株式会社 | Electric motor, electric power steering device, and vehicle |
-
2016
- 2016-12-22 CN CN201611197581.8A patent/CN106549521B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000253608A (en) * | 1999-03-03 | 2000-09-14 | Sharp Corp | Brushlfss motor |
| CN102208852A (en) * | 2010-03-30 | 2011-10-05 | 株式会社日立制作所 | Permanent magnet synchronous machine, and pressing or extrusion machine including permanent magnet synchronous machine |
| CN105830310A (en) * | 2014-01-22 | 2016-08-03 | 日本精工株式会社 | Electric motor, electric power steering device, and vehicle |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712350A (en) * | 2017-01-19 | 2017-05-24 | 扬州市新港电机有限公司 | Surface-mount type double-layer magnetic flux grooved permanent magnet synchronous motor |
| CN106712350B (en) * | 2017-01-19 | 2023-09-12 | 扬州市新港电机有限公司 | SMD double-layer flux slot permanent magnet synchronous motor |
| CN108736610A (en) * | 2018-08-09 | 2018-11-02 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
| CN108736610B (en) * | 2018-08-09 | 2019-07-16 | 珠海格力电器股份有限公司 | motor rotor and permanent magnet motor |
| US11522397B2 (en) * | 2018-08-09 | 2022-12-06 | Zhuhai Kaibang Motor Co., Ltd. | Motor rotor and permanent magnet motor |
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| Publication number | Publication date |
|---|---|
| CN106549521B (en) | 2018-12-28 |
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