CN116094275A - Built-in permanent magnet motor - Google Patents

Built-in permanent magnet motor Download PDF

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Publication number
CN116094275A
CN116094275A CN202211459205.7A CN202211459205A CN116094275A CN 116094275 A CN116094275 A CN 116094275A CN 202211459205 A CN202211459205 A CN 202211459205A CN 116094275 A CN116094275 A CN 116094275A
Authority
CN
China
Prior art keywords
permanent magnet
stator
rotor
magnet motor
built
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211459205.7A
Other languages
Chinese (zh)
Inventor
陈威振
赖恒
翟国涛
李敏
王路阔
谷青明
刘国辉
李鸿向
曹子建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Jinling Institute Of Intelligent Manufacturing Co ltd
China Aerospace Science And Industry Group Co ltd
Original Assignee
Jiangsu Jinling Institute Of Intelligent Manufacturing Co ltd
China Aerospace Science And Industry Group Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Jinling Institute Of Intelligent Manufacturing Co ltd, China Aerospace Science And Industry Group Co ltd filed Critical Jiangsu Jinling Institute Of Intelligent Manufacturing Co ltd
Priority to CN202211459205.7A priority Critical patent/CN116094275A/en
Publication of CN116094275A publication Critical patent/CN116094275A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • 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
    • 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
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • 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)
  • Microelectronics & Electronic Packaging (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

The invention discloses a built-in permanent magnet motor, which comprises a rotor, a stator, a shell, a brake and a position sensor, wherein the rotor adopts a segmented oblique pole structure and comprises a rotor iron core, a rotating shaft and a plurality of permanent magnets, the permanent magnets are arranged on the rotor iron core, the stator comprises a stator iron core and a stator armature winding, stator teeth on the stator iron core adopt a flattening mode, the air gap magnetic resistance of the facing parts of the teeth is increased, the air gap magnetic flux of the motor is in sine distribution, and the rotor and the stator are in uniform air gap matching connection. The invention adopts the design of matching and fusing the permanent magnet motor stator and the built-in permanent magnet motor rotor, reduces the cost and the cogging torque of the motor and reduces the harmonic wave while guaranteeing the output capability.

Description

Built-in permanent magnet motor
Technical Field
The invention relates to the technical field of motors, in particular to a built-in permanent magnet motor.
Background
The permanent magnet motor comprises a surface permanent magnet motor and a built-in permanent magnet motor. The built-in permanent magnet motor is composed of a stator, a built-in permanent magnet motor rotor and a shell. The air gap field generated by the built-in permanent magnet approximates to a square wave, and a large number of harmonic waves in the air gap field cause the increase of cogging torque, the increase of loss and the reduction of efficiency.
To generate a sinusoidal air gap field, permanent magnet motor rotors typically employ an irregular circular shape to create an uneven air gap, i.e., a polygonal air gap, between the inner diameter of the stator and the outer diameter of the rotor. Although the cogging torque can be reduced, the production and processing difficulty of the permanent magnet motor is increased, concentricity of the stator and the rotor is difficult to ensure in the assembling process of the stator and the rotor, and the cost is increased.
In order to optimize the waveform quality of the magnetic field, the patent CN 107294243 adopts a multi-permanent magnet combination mode, and the size of the permanent magnets and the relative positions and angles among the permanent magnets are changed, so that the waveform of the air gap magnetic density is sinusoidal, the cogging torque of the permanent magnet motor is reduced, and the design complexity and the processing and assembly cost of the motor are increased.
Disclosure of Invention
Under the background, the invention aims to provide the built-in permanent magnet motor, which adopts a method of matching and fusing a permanent magnet motor stator and a built-in permanent magnet motor rotor, reduces the cost and cogging torque of the motor and reduces harmonic waves while guaranteeing the output capability, and has the advantages of simple structure and low cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
a built-in permanent magnet motor comprises a built-in permanent magnet motor rotor, a permanent magnet motor stator, a permanent magnet motor shell, a brake and a position sensor;
the built-in permanent magnet motor has regular round rotor, is matched with the permanent magnet motor stator by adopting a uniform air gap, and the permanent magnet motor stator is matched with the built-in permanent magnet motor rotor, so that the waveform of the air gap flux density of the motor is further optimized, the cogging torque is reduced,
the built-in permanent magnet motor rotor comprises a built-in permanent magnet motor rotor core, a rotating shaft and a permanent magnet.
Furthermore, the rotor of the built-in permanent magnet motor adopts a sectional oblique pole mode, so that the rotor has a better tooth harmonic wave and cogging torque weakening effect.
Further, the rotor core of the permanent magnet motor is provided with a plurality of circular holes, and cement is added into the circular holes, so that the permanent magnet motor rotor core can effectively prevent the cement from falling off compared with the mode of adding cement into the end faces.
Further, the permanent magnets are square bodies with consistent sizes and are uniformly distributed in permanent magnet grooves of the rotor core of the permanent magnet motor in an inserting mode.
And the upper surface and the lower surface of the permanent magnet are attached to the rotor core of the permanent magnet motor, so that the temperature rise of the permanent magnet is effectively reduced, and demagnetization of the permanent magnet caused by overhigh temperature is avoided.
Further, irregular air grooves are reserved on the other two sides of the permanent magnet.
Further, the permanent magnet motor stator comprises a permanent magnet motor stator core and a permanent magnet motor stator armature winding.
Further, the permanent magnet motor stator core is manufactured by a plurality of laminated silicon steel sheets.
Further, the stator teeth of the permanent magnet motor are different from the traditional arc, and the air gap magnetic resistance of the facing parts of the teeth is increased by adopting a shaving mode, so that the air gap magnetic flux of the motor is approximately sinusoidal, and the noise and vibration of the motor are improved.
Compared with the prior art, the invention has the beneficial effects that:
(1) The rotor and the stator are mutually matched, so that the cost and the cogging torque of the motor are reduced and the harmonic wave is reduced while the output capacity is ensured;
(2) The rotor adopts a sectional oblique pole mode, and has better tooth harmonic wave and cogging torque weakening effects;
(3) According to the rotor core, the plurality of circular holes are reserved, and the cement is added into the circular holes, so that the falling of the cement can be effectively prevented compared with the mode of adding the cement into the end face;
(4) According to the permanent magnet motor rotor core, the upper surface and the lower surface of the permanent magnet are attached to the permanent magnet motor rotor core, so that the temperature rise of the permanent magnet is effectively reduced, and demagnetization caused by overhigh temperature of the permanent magnet is avoided;
(5) The stator teeth are different from the traditional arc, and the air gap magnetic resistance of the facing parts of the teeth is increased by adopting a shaving mode, so that the air gap magnetic flux of the motor is distributed nearly in a sine way, and the noise and vibration of the motor are improved;
(6) The invention has simple structure and low cost.
Drawings
Fig. 1 is a schematic diagram of the structure of an embodiment of the present invention.
Fig. 2 is a sectional view showing a structure in which a stator and a rotor are engaged in one embodiment of the present invention.
Fig. 3 is a schematic diagram of a rotor segment bevel pole structure in accordance with one embodiment of the present invention.
Fig. 4 is a schematic view of a rotor permanent magnet structure in an embodiment of the present invention.
Fig. 5 is a schematic view of a partially enlarged structure of the stator and rotor according to an embodiment of the present invention.
Fig. 6 is a schematic view of a stator tooth in an embodiment of the invention.
Reference numerals illustrate: the permanent magnet motor comprises a built-in permanent magnet motor rotor 1, a built-in permanent magnet motor rotor core 6, a rotating shaft 7, a permanent magnet 8, a first section of inclined pole 9, a second section of inclined pole 10, a circular hole 11, an air slot 12, a permanent magnet motor stator 2, a permanent magnet motor stator core 13, a permanent magnet motor stator armature winding 14, permanent magnet motor stator teeth 15, a permanent magnet motor housing 3, a brake 4 and a position sensor 5.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings:
as shown in fig. 1, one embodiment of the invention is an interior permanent magnet motor, and the interior permanent magnet motor rotor 1, the permanent magnet motor stator 2, the permanent magnet motor housing 3, the brake 4 and the position sensor 5 are realized by optimizing the design of the interior rotor to realize a sine air-gap magnetic field.
As shown in fig. 2, the rotor 1 of the permanent magnet motor is in a regular circular shape and is matched with the stator 2 of the permanent magnet motor by adopting a uniform air gap.
As shown in fig. 2, the rotor 1 of the interior permanent magnet motor includes an interior permanent magnet motor rotor core 6, a rotating shaft 7 and a permanent magnet 8, and the brake 4 and the position sensor 5 are sequentially installed at one end of the rotating shaft 7, which is common knowledge in the art and will not be described in detail herein.
As shown in fig. 3, the rotor 1 of the permanent magnet motor adopts a sectional oblique pole mode, in this embodiment, two oblique poles, and has better tooth harmonic wave and cogging torque weakening effects. The first section inclined pole 9 and the second section inclined pole 10 are axially distributed, and the inclined pole angle is 10 degrees. During assembly, the permanent magnet motor rotor core 6 corresponding to the first section inclined pole 9 can be assembled and then rotated by a corresponding inclined pole angle to assemble the second section inclined pole 10, and then the permanent magnet 8 can be inserted from the left side of the first section inclined pole 9 and the right side of the second section inclined pole 10, so that the assembly process is simple.
The rotor core 6 of the permanent magnet motor is provided with 12 circular holes 11, and cement is added into the circular holes, so that the falling of the cement can be effectively prevented compared with the mode of adding the cement on the end face.
As shown in fig. 4, the permanent magnets 8 are square bodies with consistent dimensions and are uniformly distributed in the permanent magnet slots of the rotor core of the permanent magnet motor in an inserting manner.
As shown in fig. 5, the upper surface and the lower surface of the permanent magnet 8 are both attached to the rotor core 6 of the permanent magnet motor, so that the temperature rise of the permanent magnet is effectively reduced, and demagnetization of the permanent magnet 8 caused by overhigh temperature is avoided.
The permanent magnet 8 is left with irregular air slots 12 on the remaining two sides.
As shown in fig. 2, the permanent magnet motor stator 2 includes a permanent magnet motor stator core 13 and a permanent magnet motor stator armature winding 14.
The permanent magnet motor stator core 13 is made of a plurality of laminated silicon steel sheets.
As shown in fig. 5, the permanent magnet motor stator teeth 15 on the permanent magnet motor stator core 13 are different from the traditional arc teeth, adopt stator tooth cutting mode, as shown in fig. 6, take the center point O of the arc stator tooth boot as a boot cutting point, cut edges of the stator tooth boot by the section AB perpendicular to the central axis CD of the stator tooth, optimize the radian of the stator tooth part, do not change the magnetic circuit distribution of the rotor part, achieve the optimization effect of rotor pole cutting to the air gap flux density, improve the sine degree of the air gap magnetic field, effectively weaken the cogging torque of the motor, inhibit the torque pulsation of the motor, and improve the working performance of the motor. Meanwhile, the defects of motor AC-DC axis inductance change, too narrow magnetic isolation bridge width, difficult processing technique and the like caused by rotor pole cutting are avoided.
Based on the structure, the permanent magnet motor stator 2 and the built-in permanent magnet motor rotor 1 are matched with each other, so that the air gap magnetic density waveform of the motor can be optimized, and the cogging torque can be reduced.

Claims (10)

1. The utility model provides a built-in permanent magnet motor, includes rotor, stator, casing, stopper and position sensor, its characterized in that, the rotor adopts segmentation oblique pole structure, including rotor core, pivot and a plurality of permanent magnet, and the permanent magnet is installed on rotor core, the stator includes stator core and stator armature winding, stator tooth on the stator core adopts the mode of cutting to level, makes the air gap magnetic resistance that cuts tooth part just to increase, and the motor air gap magnetic flux is sinusoidal distribution, rotor and stator adopt even air gap cooperation to connect.
2. The permanent magnet machine of claim 1 wherein the stator teeth are flattened by: the center point of the arc-shaped stator tooth shoe is taken as a shoe cutting point, and the stator tooth shoe is cut by a section AB perpendicular to the central axis CD of the stator tooth.
3. The built-in permanent magnet motor according to claim 1, wherein the rotor is formed by two sections of oblique poles, the two sections of oblique poles are axially distributed, and the oblique poles are at an angle of 10 °.
4. A permanent magnet motor according to claim 3, wherein when the two oblique poles are assembled, the permanent magnet motor rotor core corresponding to one oblique pole is assembled and then rotated by the corresponding oblique pole angle, then the other oblique pole is assembled, and permanent magnets are respectively installed from the outer sides of the two oblique poles.
5. A permanent magnet machine according to claim 3, wherein the permanent magnets 8 are mounted in permanent magnet slots of the rotor core of the permanent magnet machine by means of insertion.
6. The permanent magnet motor of claim 5 wherein the upper and lower surfaces of the permanent magnet are bonded to the rotor core of the permanent magnet motor, and wherein the permanent magnet has irregular air grooves on the remaining two sides.
7. The permanent magnet machine of claim 5 wherein the permanent magnets are square-shaped and uniformly distributed.
8. The built-in permanent magnet motor according to claim 1, wherein the rotor core is provided with a plurality of circular holes, and cement is filled in the circular holes.
9. The permanent magnet machine of claim 8 wherein the number of circular holes is 12 and evenly distributed on the rotor core.
10. The permanent magnet machine of claim 2 wherein the permanent magnet machine stator core is comprised of a plurality of laminated silicon steel sheets.
CN202211459205.7A 2022-11-17 2022-11-17 Built-in permanent magnet motor Pending CN116094275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211459205.7A CN116094275A (en) 2022-11-17 2022-11-17 Built-in permanent magnet motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211459205.7A CN116094275A (en) 2022-11-17 2022-11-17 Built-in permanent magnet motor

Publications (1)

Publication Number Publication Date
CN116094275A true CN116094275A (en) 2023-05-09

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ID=86211013

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211459205.7A Pending CN116094275A (en) 2022-11-17 2022-11-17 Built-in permanent magnet motor

Country Status (1)

Country Link
CN (1) CN116094275A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116738624A (en) * 2023-08-16 2023-09-12 江苏大学 Hybrid rotor permanent magnet motor and vibration optimization design method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116738624A (en) * 2023-08-16 2023-09-12 江苏大学 Hybrid rotor permanent magnet motor and vibration optimization design method thereof
CN116738624B (en) * 2023-08-16 2023-11-07 江苏大学 Hybrid rotor permanent magnet motor and vibration optimization design method thereof

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