CN113162270A - Rotor structure of built-in permanent magnet motor - Google Patents
Rotor structure of built-in permanent magnet motor Download PDFInfo
- Publication number
- CN113162270A CN113162270A CN202110233191.6A CN202110233191A CN113162270A CN 113162270 A CN113162270 A CN 113162270A CN 202110233191 A CN202110233191 A CN 202110233191A CN 113162270 A CN113162270 A CN 113162270A
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- permanent magnet
- straight line
- blocking
- rotor core
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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]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- 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)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a rotor structure of a built-in permanent magnet motor, which comprises a rotor core, wherein a central hole is formed in the center of the rotor core, a plurality of magnetic steel grooves are uniformly formed in the outer edge of the rotor core around the circumference of the central hole, the center of each magnetic steel groove and the center of the central hole form a central axis, the outer edge or the inner edge of each magnetic steel groove is provided with an arc-shaped part bent towards the direction of the central hole, and the arc-shaped parts are symmetrically distributed around the central axis; the advantage is that can optimize the air gap flux density wave form, makes it more sinusoidal, and then reduces the torque ripple, reduces vibration noise, reduces the loss, finally makes the motor performance obtain promoting.
Description
Technical Field
The invention relates to the technical field of permanent magnet motors, in particular to a rotor structure of a built-in permanent magnet motor.
Background
The built-in permanent magnet motor is also called as an IPM motor for short, because the quadrature-direct axis magnetic circuits of the IPM motor are asymmetric, reluctance torque exists, so that the IPM motor has the outstanding characteristics of larger output force and high power density under the same volume.
In the traditional built-in permanent magnet motor, the permanent magnet and the permanent magnet groove correspondingly inserted into the permanent magnet are rectangular, and topological structures such as a linear shape and a V shape are common according to different spatial arrangement positions. For example, chinese patent application with publication number CN105099026A discloses a virtual slot rotor of an embedded permanent magnet motor, which provides a method for weakening cogging torque by forming grooves on the surface of the rotor, wherein an even number of axially through magnetic steel slots are uniformly distributed on a rotor sheet, magnetic steels are respectively embedded in the magnetic steel slots, the magnetic steels are arranged at intervals of N poles and S poles, and each rotor pole of a rotor core is provided with at least two grooves at the outer circle of the sheet, which play a role in changing cogging torque and torque ripple, but can not effectively weaken low-order harmonics in air gap flux density, and the stator harmonic loss is still large.
Several other prior art solutions: optimizing inside and outside circular form such as stator inner circle, rotor excircle decentration, opening auxiliary groove (notch), optimizing magnetic isolation bridge, a great deal of sinusoidal means such as reducing the magnetic leakage, though each has thousand years, still have certain limitation and not enough, for example material utilization is low, and the effect is not obvious, shortcomings such as mechanical stress concentration.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a rotor structure of a built-in permanent magnet motor, which can optimize the air gap flux density waveform to make the air gap flux density waveform more sinusoidal, further reduce torque fluctuation, reduce vibration noise, reduce loss and finally improve the motor performance.
The technical scheme adopted by the invention for solving the technical problems is as follows: a rotor structure of a built-in permanent magnet motor comprises a rotor core, wherein a center hole is formed in the center of the rotor core, a plurality of magnetic steel grooves are uniformly formed in the outer edge of the rotor core around the circumference of the center hole, the center of each magnetic steel groove and the center of the center hole form a central axis, arc-shaped parts bent towards the direction of the center hole are arranged on the outer edge or the inner edge of each magnetic steel groove, and the arc-shaped parts are symmetrically distributed around the central axis.
The magnetic steel groove is composed of a placing area for accommodating the permanent magnet and magnetic isolation areas arranged at two ends of the placing area, and the magnetic isolation areas are symmetrically distributed about the central axis and are respectively communicated with the placing area. In this structure, place the region and be used for placing the permanent magnet, it is fixed to do benefit to the encapsulating on the one hand in the magnetism isolation region, and on the other hand can break the inboard magnetic leakage return circuit of permanent magnet, reduces the magnetic leakage by a wide margin, has improved the utilization ratio of permanent magnet by a wide margin.
The placing area is provided with the arc-shaped part, a first straight line part and two blocking parts, the arc-shaped part is positioned at the outer edge of the placing area, the first straight line part is positioned at the inner edge of the placing area, the first straight line part is symmetrically distributed about the central axis, one ends of the two blocking parts are respectively and vertically connected with two ends of the first straight line part, the other ends of the two blocking parts are respectively connected with the magnetism blocking area, two ends of the arc-shaped part are respectively connected with the magnetism blocking area, a blocking axis is formed between each blocking part and the end part of the corresponding arc-shaped part, and the arc-shaped part, the two blocking axes and the first straight line part are enclosed into the placing area. In the structure, the two blocking parts and the first straight line part are vertically arranged, the permanent magnet blocking platform is formed between the two blocking parts and used for positioning the permanent magnet, the permanent magnet can be prevented from shifting after the installation is completed, a blocking axis is formed between the blocking parts and the end parts corresponding to the arc parts, the blocking axis is arranged linearly and is matched with the outer contour of the permanent magnet, and the permanent magnet is convenient to install.
The first straight line part is connected with the blocking part through an eccentric arc part, and the eccentric arc part is bent towards the direction far away from the central hole. Because rotor core is formed by the stack of multiple towards the piece, at the in-process of equipment, the phenomenon of a little dislocation can take place before towards the piece with towards the piece, and the setting of eccentric arc portion then leaves the surplus for the assembly of permanent magnet, and the permanent magnet of being convenient for is installed and is placed in the region.
Each magnetism isolating area is provided with a connecting part, a second straight line part and a transition part which are sequentially connected, one end of the connecting part is connected with the arc-shaped part, one end of the transition part is connected with the blocking part, and the magnetism isolating area is enclosed among the connecting part, the second straight line part, the transition part and the blocking axis. In this structure, separate the magnetism region and enclose by connecting portion, second straight line portion, transition portion and separate the fender axis and establish and form, and with place regional being linked together, improve permanent magnet rotor's mechanical strength like this, still do not produce with the permanent magnet and interfere, can also reduce the magnetic leakage by a wide margin in addition, improve the utilization ratio of permanent magnet.
The connecting part is a straight line section or an arc section, the connecting part and the second straight line part are in circular arc transition, the transition part is a straight line section or an arc section, and the transition part and the blocking part are in circular arc transition. The advantage is that it is easy to process and manufacture.
The arc-shaped part is arranged at the outer edge of the magnetic steel groove, the inner edge of the magnetic steel groove is provided with an arc-shaped part which is bent towards the central hole, the arc-shaped part and the central hole are concentrically arranged, the arc-shaped part and the arc-shaped part are connected through two third straight line parts, and the trend of the two third straight line parts is the same as the radial direction of the rotor core. In this structure, the inward flange in magnet steel groove also is arc column structure, can further optimize the wave form of air gap magnetic flux density for the wave form of air gap magnetic flux density approaches the sine wave, thereby improves the wholeness ability, and the trend of third straight line portion is the same with rotor core's radial direction, can control the distance between the adjacent magnet steel groove like this, with reinforcing bulk strength.
And the rotor core forms a magnetic isolation bridge between two adjacent magnetic steel grooves. In the structure, because the magnetic resistance at the magnetic isolation bridge is smaller than the magnetic resistance of the permanent magnet part, the demagnetization magnetic flux has most of the magnetic isolation bridge, the magnetic potential circulation direction of the demagnetization magnetic field is changed, the demagnetization magnetic potential acting on the permanent magnet is obviously reduced, and the demagnetization resistance of the motor is effectively improved.
The circle center of the arc-shaped part is positioned on the rotor core and is different from the circle center of the central hole, and the degree of the central angle corresponding to the arc-shaped part is 25-60 degrees.
The outer edge of the rotor core is formed by connecting a plurality of same curved surfaces along the circumferential direction of the rotor core, each curved surface comprises an arc line section and straight line sections symmetrically distributed at two ends of the arc line section, the arc line sections are symmetrically distributed about the central axis, and the degree of a central angle corresponding to each arc line section is 17-40 degrees. In this structure, set up to a plurality of end to end's curved surface in proper order through the outward flange with rotor core, replace current single segment circular arc shape, be favorable to reducing the average air gap of the motor that has this rotor structure, improve motor output torque, moreover, through optimizing the curved surface, divide into arc line segment and two sections straightways with the curved surface, and change the angle of the central angle that the arc line segment corresponds, the air gap magnetic flux that can make the motor distributes and forms the shape of approximate sine wave, thereby be favorable to further increasing the output torque of motor, reduce the back electromotive force distortion rate and the tooth's socket moment of torsion of motor.
Compared with the prior art, the invention has the advantages that: the outer edge of the magnetic steel slot is provided with an arc-shaped part bent towards the direction of the central hole, and the rotor structure can utilize more regulating variables to accurately optimize the waveform of the air gap magnetic flux density, so that the waveform of the air gap magnetic flux density approaches to a sine wave, the cogging torque and the ripple torque can be greatly weakened, the electromagnetic vibration noise of the permanent magnet motor is reduced, the stray loss of the permanent magnet motor can be reduced, and the torque density and the operating efficiency of the permanent magnet motor are improved.
Drawings
Fig. 1 is a schematic perspective view of a first embodiment of the present invention;
FIG. 2 is a schematic plan view illustrating a first embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2A in accordance with the present invention;
FIG. 4 is a schematic perspective view of a second embodiment of the present invention;
FIG. 5 is a schematic plan view illustrating a second embodiment of the present invention;
fig. 6 is a waveform diagram of air gap flux density of a motor to which a rotor structure of an interior permanent magnet motor according to a second embodiment is applied;
FIG. 7 is a waveform of air gap flux density of a conventional interior permanent magnet machine;
fig. 8 is a comparison graph of cogging torque waveforms of a motor to which a rotor structure of an interior permanent magnet motor according to the second embodiment is applied and a conventional interior permanent magnet motor.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the present invention is not limited thereto.
The first embodiment is as follows: as shown in the figure, the rotor structure of the interior permanent magnet motor comprises a rotor core 1, a central hole 2 is formed in the center of the rotor core 1, a plurality of magnetic steel grooves 3 are uniformly formed in the outer edge of the rotor core 1 around the circumference of the central hole 2, the center of each magnetic steel groove 3 and the center of the central hole 2 form a central axis 21, an arc-shaped portion 41 which is bent towards the central hole 2 is formed in the outer edge or the inner edge of each magnetic steel groove 3, and the arc-shaped portions 41 are symmetrically distributed around the central axis 21.
The magnetic steel groove 3 is composed of a placing area 4 for accommodating the permanent magnet and magnetic isolation areas 5 arranged at two ends of the placing area 4, and the two magnetic isolation areas 5 are symmetrically distributed relative to a central axis 21 and are respectively communicated with the placing area 4. In this structure, place regional 4 and be used for placing the permanent magnet, separate magnetic region 5 and do benefit to the encapsulating on the one hand and fix, on the other hand can break the inboard magnetic leakage return circuit of permanent magnet, reduces the magnetic leakage by a wide margin, has improved the utilization ratio of permanent magnet by a wide margin.
The placing area 4 is provided with an arc-shaped part 41, a first straight line part 42 and two blocking parts 43, the arc-shaped part 41 is positioned at the outer edge of the placing area 4, the first straight line part 42 is positioned at the inner edge of the placing area 4, the first straight line part 42 is symmetrically distributed about the central axis 21, one end of each of the two blocking parts 43 is vertically connected with two ends of the first straight line part 42, the other end of each of the two blocking parts 43 is connected with the magnetic blocking area 5, two ends of the arc-shaped part 41 are also connected with the corresponding magnetic blocking area 5, a blocking axis 44 is formed between each blocking part 43 and the end part of the corresponding arc-shaped part 41, and the arc-shaped part 41, the two blocking axes 44 and the first straight line part 42 are enclosed into the placing area 4. In the structure, the two blocking parts 43 are vertically arranged with the first straight line part 42, a permanent magnet blocking platform is formed between the two blocking parts for positioning the permanent magnet, the permanent magnet can be prevented from shifting after the installation is finished, a blocking axis 44 is formed between the blocking part 43 and the end part of the corresponding arc part 41, the blocking axis 44 is linearly arranged and is matched with the outer contour of the permanent magnet, and the permanent magnet is convenient to install.
The first straight portion 42 and the blocking portion 43 are connected by an eccentric arc portion 45, and the eccentric arc portion 45 is bent away from the central hole 2. Because rotor core 1 is formed by the stack of multiple towards the piece, in the in-process of equipment, the phenomenon of a little dislocation can take place before towards the piece with towards the piece, and the setting of eccentric arc portion 45 then leaves the surplus for the assembly of permanent magnet, is convenient for the permanent magnet to install in placing region 4.
Each magnetic shielding region 5 has a connecting portion 51, a second linear portion 52 and a transition portion 53 connected in sequence, one end of the connecting portion 51 is connected with the arc portion 41, one end of the transition portion 53 is connected with the blocking portion 43, and the connecting portion 51, the second linear portion 52, the transition portion 53 and the blocking axis 44 are enclosed to form the magnetic shielding region 5. In the structure, the magnetic isolation area 5 is formed by surrounding the connecting part 51, the second straight line part 52, the transition part 53 and the blocking axis 44 and is communicated with the placement area 4, so that the mechanical strength of the permanent magnet rotor is improved, interference with a permanent magnet is avoided, magnetic leakage can be greatly reduced, and the utilization rate of the permanent magnet is improved.
The connecting portion 51 is a straight line segment 62 or an arc segment 61, and a circular arc transition is formed between the connecting portion 51 and the second straight portion 52, the transition portion 53 is a straight line segment 62 or an arc segment 61, and a circular arc transition is formed between the transition portion 53 and the blocking portion 43. The advantage is that it is easy to process and manufacture.
The rotor core 1 forms a magnetic isolation bridge 11 between two adjacent magnetic steel slots 3. In this structure, because the magnetic resistance of magnetism bridge 11 department is less than the magnetic resistance of permanent magnet part, the demagnetization magnetic flux will have most to pass through magnetism bridge 11, has changed the magnetomotive circulation direction in demagnetization magnetic field, and the demagnetization magnetomotive that acts on the permanent magnet obviously reduces, has effectively improved the anti demagnetization ability of motor.
The circle center of the arc part 41 is located on the rotor core 1 and is different from the circle center of the central hole 2, and the degree of the central angle corresponding to the arc part 41 is 25-60 degrees.
The outer edge of the rotor core 1 is formed by connecting a plurality of identical curved surfaces 6 along the circumferential direction of the rotor core 1, each curved surface 6 comprises an arc line section 61 and straight line sections 62 which are symmetrically distributed at two ends of the arc line section 61, the arc line sections 61 are symmetrically distributed about a central axis 21, and the degree of a central angle corresponding to each arc line section 61 is 17-40 degrees. In this structure, through setting up rotor core 1's outward flange into a plurality of curved surface 6 of end to end in proper order, replace current single segment circular arc shape, be favorable to reducing the average air gap of the motor that has this rotor structure, improve motor output torque, moreover, through optimizing curved surface 6, divide curved surface 6 into arc segment 61 and two sections straightway 62, and change the angle of the central angle that arc segment 61 corresponds, the air gap magnetic flux that can make the motor distributes and forms the shape of approximate sine wave, thereby be favorable to further increasing the output torque of motor, reduce the back electromotive force distortion rate and the tooth's socket moment of torsion of motor.
Example two: as shown in the figure, the rotor structure of the interior permanent magnet motor comprises a rotor core 1, a central hole 2 is formed in the center of the rotor core 1, a plurality of magnetic steel grooves 3 are uniformly formed in the outer edge of the rotor core 1 around the circumference of the central hole 2, the center of each magnetic steel groove 3 and the center of the central hole 2 form a central axis 21, an arc-shaped portion 41 which is bent towards the central hole 2 is formed in the outer edge or the inner edge of each magnetic steel groove 3, and the arc-shaped portions 41 are symmetrically distributed around the central axis 21.
The rotor core 1 forms a magnetic isolation bridge 11 between two adjacent magnetic steel slots 3. In this structure, because the magnetic resistance of magnetism bridge 11 department is less than the magnetic resistance of permanent magnet part, the demagnetization magnetic flux will have most to pass through magnetism bridge 11, has changed the magnetomotive circulation direction in demagnetization magnetic field, and the demagnetization magnetomotive that acts on the permanent magnet obviously reduces, has effectively improved the anti demagnetization ability of motor.
The circle center of the arc part 41 is located on the rotor core 1 and is different from the circle center of the central hole 2, and the degree of the central angle corresponding to the arc part 41 is 25-60 degrees.
The outer edge of the rotor core 1 is formed by connecting a plurality of identical curved surfaces 6 along the circumferential direction of the rotor core 1, each curved surface 6 comprises an arc line section 61 and straight line sections 62 which are symmetrically distributed at two ends of the arc line section 61, the arc line sections 61 are symmetrically distributed about a central axis 21, and the degree of a central angle corresponding to each arc line section 61 is 17-40 degrees. In this structure, through setting up rotor core 1's outward flange into a plurality of curved surface 6 of end to end in proper order, replace current single segment circular arc shape, be favorable to reducing the average air gap of the motor that has this rotor structure, improve motor output torque, moreover, through optimizing curved surface 6, divide curved surface 6 into arc segment 61 and two sections straightway 62, and change the angle of the central angle that arc segment 61 corresponds, the air gap magnetic flux that can make the motor distributes and forms the shape of approximate sine wave, thereby be favorable to further increasing the output torque of motor, reduce the back electromotive force distortion rate and the tooth's socket moment of torsion of motor.
Fig. 6 is a waveform diagram showing the air gap flux density of the motor adopting the rotor structure of the interior permanent magnet motor according to the present embodiment, and comparing fig. 6 with fig. 7, it can be seen that the sine degree of the air gap flux density of the conventional interior permanent magnet motor is poor, whereas the waveform of the air gap flux density of the motor adopting the rotor structure of the interior permanent magnet motor according to the present embodiment is close to the standard sine wave. Fig. 8 is a waveform comparison diagram showing a cogging torque of the conventional interior permanent magnet motor and a cogging torque of the motor using the rotor structure of the interior permanent magnet motor according to the present embodiment, and it can be seen from fig. 8 that the cogging torque can be greatly reduced using the rotor structure of the interior permanent magnet motor according to the present embodiment.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereby, and the present invention may be modified in materials and structures, or replaced with technical equivalents, in the constructions of the above-mentioned various components. Therefore, structural equivalents made by using the description and drawings of the present invention or by directly or indirectly applying to other related arts are also encompassed within the scope of the present invention.
Claims (10)
1. The utility model provides a built-in permanent-magnet machine's rotor structure, includes rotor core, rotor core's center seted up the centre bore, rotor core's outward flange around the centre bore circumference evenly seted up a plurality of magnetic steel grooves, its characterized in that: the center of the magnetic steel groove and the center of the central hole form a central axis, the outer edge or the inner edge of the magnetic steel groove is provided with an arc-shaped part bending towards the direction of the central hole, and the arc-shaped parts are symmetrically distributed around the central axis.
2. The rotor structure of an interior permanent magnet machine according to claim 1, wherein: the magnetic steel groove is composed of a placing area for accommodating the permanent magnet and magnetic isolation areas arranged at two ends of the placing area, and the magnetic isolation areas are symmetrically distributed about the central axis and are respectively communicated with the placing area.
3. The rotor structure of an interior permanent magnet machine according to claim 2, wherein: the placing area is provided with the arc-shaped part, a first straight line part and two blocking parts, the arc-shaped part is positioned at the outer edge of the placing area, the first straight line part is positioned at the inner edge of the placing area, the first straight line part is symmetrically distributed about the central axis, one ends of the two blocking parts are respectively and vertically connected with two ends of the first straight line part, the other ends of the two blocking parts are respectively connected with the magnetism blocking area, two ends of the arc-shaped part are respectively connected with the magnetism blocking area, a blocking axis is formed between each blocking part and the end part of the corresponding arc-shaped part, and the arc-shaped part, the two blocking axes and the first straight line part are enclosed into the placing area.
4. The rotor structure of an interior permanent magnet machine according to claim 3, wherein: the first straight line part is connected with the blocking part through an eccentric arc part, and the eccentric arc part is bent towards the direction far away from the central hole.
5. The rotor structure of an interior permanent magnet machine according to claim 3, wherein: each magnetism isolating area is provided with a connecting part, a second straight line part and a transition part which are sequentially connected, one end of the connecting part is connected with the arc-shaped part, one end of the transition part is connected with the blocking part, and the magnetism isolating area is enclosed among the connecting part, the second straight line part, the transition part and the blocking axis.
6. The rotor structure of an interior permanent magnet machine according to claim 5, wherein: the connecting part is a straight line section or an arc section, the connecting part and the second straight line part are in circular arc transition, the transition part is a straight line section or an arc section, and the transition part and the blocking part are in circular arc transition.
7. The rotor structure of an interior permanent magnet machine according to claim 1, wherein: the arc-shaped part is arranged at the outer edge of the magnetic steel groove, the inner edge of the magnetic steel groove is also provided with an arc-shaped part which is bent towards the central hole, the arc-shaped part and the central hole are concentrically arranged, the arc-shaped part is connected with the arc-shaped part through two third straight line parts, and the trend of the two third straight line parts is the same as the radial direction of the rotor core.
8. The rotor structure of an interior permanent magnet machine according to claim 1, wherein: and the rotor core forms a magnetic isolation bridge between two adjacent magnetic steel grooves.
9. The rotor structure of an interior permanent magnet machine according to claim 1, wherein: the circle center of the arc-shaped part is positioned on the rotor core and is different from the circle center of the central hole, and the degree of the central angle corresponding to the arc-shaped part is 25-60 degrees.
10. The rotor structure of an interior permanent magnet machine according to claim 1, wherein: the outer edge of the rotor core is formed by connecting a plurality of same curved surfaces along the circumferential direction of the rotor core, each curved surface comprises an arc line section and straight line sections symmetrically distributed at two ends of the arc line section, the arc line sections are symmetrically distributed about the central axis, and the degree of a central angle corresponding to each arc line section is 17-40 degrees.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020116190393 | 2020-12-30 | ||
| CN202011619039 | 2020-12-30 |
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| CN113162270A true CN113162270A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110233191.6A Pending CN113162270A (en) | 2020-12-30 | 2021-03-03 | Rotor structure of built-in permanent magnet motor |
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| CN1436389A (en) * | 2000-06-14 | 2003-08-13 | 松下电器产业株式会社 | Permanent magnet synchronous motor |
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| CN106165259A (en) * | 2014-04-08 | 2016-11-23 | 三菱电机株式会社 | Permanent magnet embedded rotating electrical machines |
| CN206041678U (en) * | 2016-09-05 | 2017-03-22 | 广东美芝制冷设备有限公司 | A rotor, motor and compressor for motor |
| CN108063505A (en) * | 2017-12-19 | 2018-05-22 | 珠海格力电器股份有限公司 | Permanent magnet embedded rotor core, motor rotor and motor |
| CN208479307U (en) * | 2018-08-01 | 2019-02-05 | 江西博致电子技术有限公司 | A kind of permanent-magnetic synchronous motor rotor for saving permanent magnet |
| CN109742879A (en) * | 2019-02-02 | 2019-05-10 | 宁波安信数控技术有限公司 | A kind of rotor structure for permanent magnet motor |
| JP2020036518A (en) * | 2018-08-31 | 2020-03-05 | 日産自動車株式会社 | Variable magnetic flux type rotating electric machine |
| CN111786481A (en) * | 2020-07-13 | 2020-10-16 | 无锡欧瑞京机电有限公司 | Multilayer rotor magnetic steel structure of permanent magnet motors for high power density new energy vehicles |
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2021
- 2021-03-03 CN CN202110233191.6A patent/CN113162270A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1436389A (en) * | 2000-06-14 | 2003-08-13 | 松下电器产业株式会社 | Permanent magnet synchronous motor |
| CN106165259A (en) * | 2014-04-08 | 2016-11-23 | 三菱电机株式会社 | Permanent magnet embedded rotating electrical machines |
| CN103929033A (en) * | 2014-04-10 | 2014-07-16 | 西北工业大学 | A permanent magnet synchronous motor rotor structure with bow-shaped permanent magnets |
| CN206041678U (en) * | 2016-09-05 | 2017-03-22 | 广东美芝制冷设备有限公司 | A rotor, motor and compressor for motor |
| CN108063505A (en) * | 2017-12-19 | 2018-05-22 | 珠海格力电器股份有限公司 | Permanent magnet embedded rotor core, motor rotor and motor |
| CN208479307U (en) * | 2018-08-01 | 2019-02-05 | 江西博致电子技术有限公司 | A kind of permanent-magnetic synchronous motor rotor for saving permanent magnet |
| JP2020036518A (en) * | 2018-08-31 | 2020-03-05 | 日産自動車株式会社 | Variable magnetic flux type rotating electric machine |
| CN109742879A (en) * | 2019-02-02 | 2019-05-10 | 宁波安信数控技术有限公司 | A kind of rotor structure for permanent magnet motor |
| CN111786481A (en) * | 2020-07-13 | 2020-10-16 | 无锡欧瑞京机电有限公司 | Multilayer rotor magnetic steel structure of permanent magnet motors for high power density new energy vehicles |
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