CN116505683B - A low torque ripple permanent magnet reluctance motor rotor - Google Patents
A low torque ripple permanent magnet reluctance motor rotor Download PDFInfo
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- CN116505683B CN116505683B CN202310406410.5A CN202310406410A CN116505683B CN 116505683 B CN116505683 B CN 116505683B CN 202310406410 A CN202310406410 A CN 202310406410A CN 116505683 B CN116505683 B CN 116505683B
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- 230000004888 barrier function Effects 0.000 claims abstract description 86
- 238000003475 lamination Methods 0.000 claims abstract description 51
- 230000010349 pulsation Effects 0.000 claims abstract description 19
- 238000004080 punching Methods 0.000 claims abstract description 12
- 238000005457 optimization Methods 0.000 claims description 9
- 230000005404 monopole Effects 0.000 abstract 1
- 230000001629 suppression Effects 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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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
- 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
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
- H02P25/098—Arrangements for reducing torque ripple
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a permanent magnet reluctance motor rotor with low torque pulsation, and belongs to the technical field of permanent magnet reluctance motors. The rotor is formed by combining a first lamination and a second lamination which are formed by the same punching sheet, a plurality of layers of magnetic barriers and permanent magnets are arranged under each pole, and for the first lamination, the tail ends of the layers of magnetic barriers of the rotor on one side of a q-axis deviate by a certain angle relative to the other side; the first lamination is horizontally turned 180 degrees to obtain the second lamination, compared with the first lamination, the shape of the magnetic barrier under the monopole is in mirror symmetry about the q-axis, the torque harmonic amplitude and the phase of the same times of the two laminations are different, and the two laminations are overlapped and combined in a certain proportion, so that the permanent magnet reluctance motor has larger average torque and simultaneously reduces torque pulsation. The invention can realize the suppression of the torque harmonic wave of specific times and reduce the torque pulsation of the motor. The invention has important significance for improving the performance of the permanent magnet reluctance motor and expanding application thereof.
Description
Technical Field
The invention belongs to the technical field of permanent magnet reluctance motors, and particularly relates to a permanent magnet reluctance motor rotor with low torque pulsation.
Background
The permanent magnet motor has the advantages of high power density, high efficiency and the like, the development of the permanent magnet motor is closely related to the development of permanent magnet materials, the advent of a neodymium iron boron permanent magnet with high magnetic energy product promotes the rapid development of the permanent magnet motor, but simultaneously, the problems of cost and permanent magnet material supply are brought, the high-performance permanent magnet contains rare earth elements, the rare earth price fluctuates obviously in recent years, and the supply chain of the rare earth is not stable enough due to factors such as geopolitical and the like, so the permanent magnet motor will develop towards the direction without rare earth or with less rare earth in the future, and meanwhile, the motor is ensured to have higher power density.
The torque of the permanent magnet reluctance motor comprises two components of permanent magnet torque and reluctance torque, and compared with the permanent magnet motor, the permanent magnet reluctance motor improves the reluctance torque ratio through the design of a plurality of layers of magnetic barriers, and can reduce the use amount of the permanent magnets. The main disadvantage of the permanent magnet reluctance motor is that the torque pulsation is large and the vibration noise of the motor is large due to the complexity of the rotor structure.
In previous studies, the main means for torque ripple reduction for permanent magnet reluctance motors included: 1. the rotor inclined pole is commonly adopted, but certain output torque is sacrificed, so that the torque density of the motor is reduced; 2. the design and optimization of the geometric parameters of the rotor magnetic barrier are realized, but the rotor structure of the permanent magnet reluctance motor is complex, and the optimization parameters are numerous, so that the optimization difficulty is high and the time consumption is long; 3. the slot pole matching and the number of layers of the magnetic barriers are changed, but the torque pulsation inhibition effect is not obvious through research. Therefore, the torque ripple problem of the permanent magnet reluctance motor is to be further studied.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a permanent magnet reluctance motor rotor with low torque pulsation, which aims to improve the torque pulsation inhibition effect and reduce the design optimization time consumption.
In order to achieve the above purpose, the invention provides a rotor for reducing torque pulsation of a permanent magnet reluctance motor, wherein a magnetic circuit equivalent model is utilized to simply and rapidly select a rotor magnetic barrier tail angle, and a rotor punching mirror image combination mode is adopted to reduce the amplitude of main subharmonic waves so as to reduce the torque pulsation of the motor. The rotor is provided with p pairs of magnetic poles, N layers of permanent magnets and magnetic barriers are arranged below each magnetic pole, each permanent magnet is embedded in the center position of each layer of magnetic barrier, the punching sheet of the rotor is of an asymmetric structure, and N is formed by the same punching sheet 1 First lamination and N 2 And the second lamination is combined, the central symmetry axis of the permanent magnet under each pole is defined as a q-axis, the magnetic barriers at the two sides of the permanent magnet under each magnetic pole of the first lamination are asymmetric about the q-axis, and the magnetic barriers at the two sides of the permanent magnet of the second lamination and the magnetic barriers at the two sides of the first lamination are in mirror symmetry about the q-axis. Each magnetic pole is provided with n layers of magnetic barriers and permanent magnets, the permanent magnets are axisymmetric about a q-axis, and the magnetic barriers are arranged at two sides of the permanent magnetsThe tail end deviates from the q axis by different angles, wherein the angles of the two sides of the q axis of the outermost layer of magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the innermost layer magnetic barrier are respectively theta n And theta n ' wherein Δθ 1 ＝|θ 1 ′-θ 1 |，Δθ n ＝|θ n ′-θ n Establishing an equivalent magnetic circuit model of the permanent magnet reluctance motor to obtain the relation between the torque performance of the motor and the angle of the tail end of the magnetic barrier, thereby obtaining the angle combination theta of the first lamination 1 ，θ 2 ，···θ n ，θ 1 '，θ 2 '···θ n '。
Taking a double-layer magnetic barrier permanent magnet reluctance motor as an example, assume that angles at two sides of q-axis of the outer layer magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the inner layer magnetic barrier are respectively theta 2 And theta 2 ' neglecting stator slotting, assuming a linear model, the expression of the torque available based on the equivalent magnetic circuit model of the permanent magnet reluctance motor is:
wherein,
d is the outer diameter of the rotor, L stk For the length of the motor stack, g is the length of the air gap, p is the pole pair number of the rotor, K ν Is v times linear current density amplitude, +.>Is the ratio of the equivalent width to the length of the magnetic barrier, alpha i For the phase angle of the current, H c Is the coercive force of the permanent magnet, l m The length of the permanent magnet is the length of the permanent magnet;
obtaining the relation between the torque performance of the motor and the angle of the tail end of the magnetic barrier based on a theoretical model, and obtaining the angle combination theta through optimization 1 ，θ 2 ，θ 1 ' and theta 2 ' so that the primary subharmonics of the first and second laminations are in opposite phase, N 1 And N 2 Is equal to the inverse ratio of the primary subharmonic amplitudes of the first lamination and the second lamination, and the combined structural torque ripple is significantly reduced.
The invention also provides a three-layer magnetic barrier permanent magnet reluctance motor, and the angles of the two sides of the q axis of the outer layer magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the middle magnetic barrier are respectively theta 2 And theta 2 ' the angles of the two sides of the q axis of the inner layer magnetic barrier are respectively theta 3 And theta 3 ' neglecting stator slotting, assuming a linear model, the expression of the torque available based on the equivalent magnetic circuit model of the permanent magnet reluctance motor is:
based on the theoretical model, the relation between the amplitude and the phase of each subharmonic torque and the angle of the magnetic barrier can be obtained, and the angle combination theta is obtained through optimization 1 ，θ 2 ，θ 3 ，θ 1 '，θ 2 ' and theta 3 ' so that the primary subharmonics of the first and second laminations are in opposite phase, N 1 And N 2 Is equal to the inverse of the ratio of the primary subharmonic amplitudes of the first lamination and the second lamination.
Considering stator slotting, a similar conclusion is obtained through simulation analysis, namely, the combination of the asymmetric magnetic barrier rotor lamination and the mirror symmetry structure thereof can reduce the amplitude of the main subharmonic of the torque so as to reduce the torque pulsation. N (N) 1 And N 2 Is equal to the inverse of the ratio of the primary subharmonic amplitudes of the first lamination and the second lamination obtained by means of an equivalent magnetic circuit model.
Compared with the prior art, the technical scheme of the invention provides a theoretical model of the permanent magnet reluctance motor, selects the angle of the tail end of the magnetic barrier on the basis, reduces torque harmonic waves of specific times through the combination of mirror symmetry structures, can improve the design and optimization speed of a rotor structure, obviously reduces the torque pulsation of the permanent magnet reluctance motor under the precursor with unchanged permanent magnet consumption, and is expected to become a lower-cost alternative scheme of the permanent magnet reluctance motor with larger competitiveness in more application occasions.
Drawings
FIG. 1 is a schematic diagram of a stator and rotor structure of an asymmetric-flux permanent magnet reluctance motor according to an embodiment of the present application;
FIG. 2 is a comparison of 18 th order torque harmonic waveforms of an asymmetric flux-barrier structure and a mirror-symmetrical structure thereof in an embodiment of the present application;
FIG. 3 is a schematic diagram of a quarter rotor configuration of an asymmetric barrier stack and a horizontally flipped stack in accordance with an embodiment of the present application;
FIG. 4 is a comparison of torque waveforms for a permanent magnet reluctance motor of different configurations in an embodiment of the present application.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not interfere with each other.
The invention provides a rotor for reducing torque pulsation of a permanent magnet reluctance motor, which utilizes a magnetic circuit equivalent model to simply and rapidly select a rotor magnetic barrier tail angle, adopts a rotor punching mirror image combination mode to reduce the amplitude of main subharmonic waves, and further reduces the torque pulsation of the motor. The rotor comprises a plurality of magnetic poles, a plurality of groups of hole slots are formed in the punching sheet of the rotor corresponding to each magnetic pole, the hole slots are magnetic barriers, permanent magnets are embedded in the middle positions of the magnetic barriers, the punching sheet of the rotor is of an asymmetric structure, and the asymmetric structure comprises N formed by the same punching sheet 1 First lamination and N 2 A second lamination, the magnetic barrier of each magnetic pole of the first laminationThe extension lines of the asymmetric magnetic pole axes and the magnetic pole axes intersect at a point, the shapes of the single-pole lower magnetic barriers of the second lamination and the first lamination are mirror symmetry about a q-axis, n layers of magnetic barriers and permanent magnets are arranged under each magnetic pole, the permanent magnets are axisymmetric about the q-axis, the angles of the tail ends of the magnetic barriers at the two sides of the permanent magnets deviating from the q-axis are different, wherein the angles at the two sides of the q-axis of the outermost magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the innermost layer magnetic barrier are respectively theta n And theta n ' wherein Δθ 1 ＝|θ 1 ′-θ 1 |，Δθ n ＝|θ n ′-θ n Establishing an equivalent magnetic circuit model of the permanent magnet reluctance motor to obtain the relation between the torque performance of the motor and the angle of the tail end of the magnetic barrier, thereby obtaining the angle combination theta of the first lamination 1 ，θ 2 ，···θ n ，θ 1 ′，θ 2 ′···θ n ′。
For a double-layer magnetic barrier permanent magnet reluctance motor, the magnetic barrier under each magnetic pole comprises an outer magnetic barrier and an inner magnetic barrier, and angles of two sides of a q-axis of the outer magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the inner layer magnetic barrier are respectively theta 2 And theta 2 ' wherein Δθ 1 ＝|θ 1 ′-θ 1 |，Δθ 2 ＝|θ 2 ′-θ 2 | a. The invention relates to a method for producing a fibre-reinforced plastic composite. For a three-layer magnetic barrier permanent magnet reluctance motor, an outer magnetic barrier, a middle magnetic barrier and an inner magnetic barrier are arranged under each magnetic pole, and angles of two sides of a q-axis of the outer magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the middle magnetic barrier are respectively theta 2 And theta 2 ' the angles of the two sides of the q axis of the inner layer magnetic barrier are respectively theta 3 And theta 3 '，Δθ 1 ＝|θ 1 ′-θ 1 |，Δθ 2 ＝|θ 2 ′-θ 2 |，Δθ 3 ＝|θ 3 ′-θ 3 |。
Taking a three-layer magnetic barrier permanent magnet reluctance motor as an example, assume that angles at two sides of q-axis of the outer layer magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the middle magnetic barrier are respectively theta 2 And theta 2 ' the angles of the two sides of the q axis of the inner layer magnetic barrier are respectively theta 3 And theta 3 ' neglecting stator slots, assuming a linear model,the expression of the torque available based on the equivalent magnetic circuit model of the permanent magnet reluctance motor is:
the main parameters of a permanent magnet reluctance motor are shown in table 1, the permanent magnet material adopts Y30 ferrite, and the structural schematic diagram is shown in fig. 1. Neglecting stator slotting, wherein the stator phase current amplitude is 6.89A, and when the magnetic barriers are symmetrical, the included angles theta between the tail ends of the two sides of the outer layer, the middle layer and the inner layer of the magnetic barriers and the q axis are formed 1 ，θ 2 And theta 3 When the angles are 18 degrees, 28 degrees and 38 degrees respectively, the average torque theoretical value of the motor is 41.0Nm, the torque pulsation theoretical value is 29.8 percent, and the parameters are scanned by taking the clamping angle between the tail end of the magnetic barrier and the q-axis as variables to obtain the current theta 1 ，θ 2 ，θ 3 ，θ 1 '，θ 2 ' and theta 3 ' average torque theoretical value is 40.1Nm and torque ripple theoretical value is 22.9% at 12, 22, 36, 17, 28 and 38 degrees respectively, and θ after rotor lamination is turned horizontally 180 degrees 1 ，θ 2 ，θ 3 ，θ 1 '，θ 2 ' and theta 3 ' 17, 28, 38, 12, 22 and 36 degrees, respectively, with the other parameters unchanged, the average torque theoretical value of the motor is 39.7Nm, the torque ripple theoretical value is 38.0%, and the 18 th order torque harmonic waveform and structure before overturning pair is shown in fig. 2. The two laminations were combined in a certain ratio to keep the total lamination length unchanged, as shown in fig. 3, resulting in an average torque of 39.9Nm and a torque ripple of 16.0%, and the torque ripple was reduced by about 46% as compared to the symmetrical magnetic barrier scheme, and the obtained finite element simulation and theoretical result pairs are shown in table 2. The torque waveform pairs corresponding to the symmetrical barrier rotor structure, the two asymmetrical barrier rotor structures and the combined structure are shown in fig. 4. The invention can be applied to permanent magnet reluctance motors with different numbers of layers and shapes of magnetic barriers, and can effectively reduce torque pulsation of the permanent magnet reluctance motor.
Table 1 main parameters of motor
| Parameter name | Numerical value |
| Stator outer diameter D e /mm | 155 |
| Length of stack L stk /mm | 105 |
| Stator inner diameter D si /mm | 98 |
| Stator slot number Q s | 36 |
| Polar logarithm p | 2 |
| Air gap length g/mm | 0.3 |
| Outer permanent magnet width l m1 /mm | 11.3 |
| Width l of intermediate permanent magnet m2 /mm | 11.3 |
| Inner permanent magnet width l m3 /mm | 11.3 |
TABLE 2 finite element simulation vs. theoretical results
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (2)
1. A rotor for reducing torque pulsation of a permanent magnet reluctance motor comprises p pairs of magnetic poles, N layers of permanent magnets and magnetic barriers are arranged below each magnetic pole, each permanent magnet is embedded in the center position of each layer of magnetic barrier, a punching sheet of the rotor is of an asymmetric structure, and N is formed by the same punching sheet 1 First lamination and N 2 The second lamination is formed by combining, the central symmetry axis of the permanent magnet under each pole is defined as q axis, the magnetic barriers at two sides of the permanent magnet under each magnetic pole of the first lamination are asymmetric with respect to the q axis, the magnetic barriers at two sides of the permanent magnet of the second lamination and the permanent magnet of the first lamination are mirror symmetry with respect to the q axis, the permanent magnet is characterized in that two layers of magnetic barriers and the permanent magnet are arranged under each magnetic pole and symmetric with respect to the q axis, the angles of the tail ends of the magnetic barriers at two sides of the permanent magnet deviate from the q axis are different, wherein the angles at two sides of the q axis of the outer layer of the magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the inner layer magnetic barrier are respectively theta 2 And theta 2 ' wherein Δθ 1 ＝|θ 1 ′-θ 1 |，Δθ 2 ＝|θ 2 ′-θ 2 Establishing an equivalent magnetic circuit model of the permanent magnet reluctance motor to obtain the relation between the torque performance of the motor and the angle of the tail end of the magnetic barrier, thereby obtaining the angle combination theta of the first lamination 1 ，θ 2 ，θ 1 ' and theta 2 'A'; the equivalent magnetic circuit model of the permanent magnet reluctance motor is established as follows:
wherein, d is the outer diameter of the rotor, L stk For the length of the motor stack, g is the length of the air gap, p is the pole pair number of the rotor, K ν Is v times linear current density amplitude, +.>Is the ratio of the equivalent width to the length of the magnetic barrier, alpha i For the phase angle of the current, H c Is the coercive force of the permanent magnet, l m The length of the permanent magnet is the length of the permanent magnet;
obtaining the relation between the torque performance of the motor and the angle of the tail end of the magnetic barrier based on a theoretical model, and obtaining the angle combination theta of the first lamination through optimization 1 ，θ 2 ，θ 1 ' and theta 2 'A'; wherein the second lamination is mirror symmetrical with the first lamination about the q-axis, the main subharmonics of the two laminations are opposite in phase, and N is determined according to the inverse proportion of the amplitude of the main subharmonics 1 And N 2 To obtain a combined rotor structure with a larger average torque and reduced torque ripple.
2. A rotor for reducing torque pulsation of a permanent magnet reluctance motor comprises p pairs of magnetic poles, N layers of permanent magnets and magnetic barriers are arranged below each magnetic pole, each permanent magnet is embedded in the center position of each layer of magnetic barrier, a punching sheet of the rotor is of an asymmetric structure, and N is formed by the same punching sheet 1 First lamination and N 2 The second lamination is combined, the central symmetry axis of the permanent magnet under each pole is defined as q axis, the magnetic barriers at two sides of the permanent magnet under each magnetic pole of the first lamination are asymmetric with respect to the q axis, the magnetic barriers at two sides of the permanent magnet of the second lamination and the first lamination are mirror symmetric with respect to the q axis, the permanent magnet is characterized in that three layers of permanent magnets and magnetic barriers are arranged under each magnetic pole, and the permanent magnets are arranged on the two sides of the permanent magnetThe body is symmetrical about the q-axis, the angles of the tail ends of the magnetic barriers at the two sides of the permanent magnet deviate from the q-axis are different, and the angles at the two sides of the q-axis of the outer layer magnetic barrier are respectively theta 1 And theta 1 ' the angles of the two sides of the q axis of the middle magnetic barrier are respectively theta 2 And theta 2 ' the angles of the two sides of the q axis of the inner layer magnetic barrier are respectively theta 3 And theta 3 '，Δθ 1 ＝|θ 1 ′-θ 1 |，Δθ 2 ＝|θ 2 ′-θ 2 |，Δθ 3 ＝|θ 3 ′-θ 3 Establishing an equivalent magnetic circuit model of the permanent magnet reluctance motor to obtain the relation between the torque performance of the motor and the angle of the tail end of the magnetic barrier, thereby obtaining the angle combination theta of the first lamination 1 ，θ 2 ，θ 3 ，θ 1 '，θ 2 ' and theta 3 'A'; the equivalent magnetic circuit model of the permanent magnet reluctance motor is established as follows:
wherein,
obtaining the relation between the torque performance of the motor and the angle of the tail end of the magnetic barrier based on a theoretical model, and obtaining a first lamination angle combination theta through optimization 1 ，θ 2 ，θ 3 ，θ 1 '，θ 2 ' and theta 3 'A'; wherein the second lamination is mirror symmetrical with the first lamination about the q-axis, the main subharmonics of the two laminations are opposite in phase, and N is determined according to the inverse proportion of the amplitude of the main subharmonics 1 And N 2 To obtain a combined rotor structure with a larger average torque and reduced torque ripple.
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| CN202310406410.5A CN116505683B (en) | 2023-04-17 | 2023-04-17 | A low torque ripple permanent magnet reluctance motor rotor |
| PCT/CN2024/071495 WO2024217080A1 (en) | 2023-04-17 | 2024-01-10 | Permanent magnet reluctance motor rotor having low-torque pulsation |
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| CN202310406410.5A CN116505683B (en) | 2023-04-17 | 2023-04-17 | A low torque ripple permanent magnet reluctance motor rotor |
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| CN116505683B (en) * | 2023-04-17 | 2024-02-02 | 华中科技大学 | A low torque ripple permanent magnet reluctance motor rotor |
| CN117811252B (en) * | 2023-12-29 | 2025-05-23 | 东北林业大学 | Magnetic field offset multi-layer magnetic barrier permanent magnet synchronous motor and design method |
| CN119448618B (en) * | 2025-01-13 | 2025-03-28 | 泉州装备制造研究所 | Sensorless internal permanent magnet synchronous motor and rotor mechanical angle detection method |
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| CN115955028A (en) * | 2023-01-18 | 2023-04-11 | 华中科技大学 | A Rotor for Reducing Torque Ripple of Synchronous Reluctance Motor |
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| DE102012101822A1 (en) * | 2012-03-05 | 2013-10-10 | Feaam Gmbh | Rotor and electric machine |
| DE102014014487A1 (en) * | 2014-02-11 | 2015-08-13 | Liebherr-Aerospace Lindenberg Gmbh | Aircraft with a synchronous reluctance machine |
| DE102016211841A1 (en) * | 2016-06-30 | 2018-01-04 | Universität der Bundeswehr München | Rotor, method of manufacturing a rotor, reluctance machine and work machine |
| CN109067039A (en) * | 2018-09-12 | 2018-12-21 | 南京航空航天大学 | A kind of asymmetric buttferfly-type internal permanent magnet synchronous motor |
| CN113890230A (en) * | 2021-10-29 | 2022-01-04 | 上海电机学院 | Asymmetric magnetic barrier rotor structure of built-in permanent magnet synchronous motor |
| CN116505683B (en) * | 2023-04-17 | 2024-02-02 | 华中科技大学 | A low torque ripple permanent magnet reluctance motor rotor |
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| CN103166407A (en) * | 2011-12-09 | 2013-06-19 | 通用汽车环球科技运作有限责任公司 | Interior permanent magnet machine with pole-to-pole asymmetry of rotor slot placement |
| CN115955028A (en) * | 2023-01-18 | 2023-04-11 | 华中科技大学 | A Rotor for Reducing Torque Ripple of Synchronous Reluctance Motor |
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| Title |
|---|
| 大功率永磁辅助同步磁阻牵引电机磁极优化;耿涛;孙建忠;白凤仙;;磁性材料及器件(第03期);第14-16页 * |
| 辅磁同步磁阻电动机低转矩脉动下转子结构优化;代希杰;张广明;邓歆;;微特电机(第10期);第15-18页 * |
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| Publication number | Publication date |
|---|---|
| WO2024217080A1 (en) | 2024-10-24 |
| CN116505683A (en) | 2023-07-28 |
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