CN114244051A - High-efficiency permanent magnet synchronous motor - Google Patents
High-efficiency permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN114244051A CN114244051A CN202111609634.3A CN202111609634A CN114244051A CN 114244051 A CN114244051 A CN 114244051A CN 202111609634 A CN202111609634 A CN 202111609634A CN 114244051 A CN114244051 A CN 114244051A
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- stator
- unit
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- increased
- key
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 22
- 238000004804 winding Methods 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 239000004020 conductor Substances 0.000 claims description 7
- 239000002356 single layer Substances 0.000 claims description 7
- 230000004907 flux Effects 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 47
- 238000000034 method Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 2
- 239000011810 insulating material 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
Images
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
- H02K1/165—Shape, form or location of the slots
-
- 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
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a high-efficiency permanent magnet synchronous motor which comprises a stator unit, a rotor core unit and a shaft sleeve unit, wherein the stator unit is provided with a plurality of stator slots at equal intervals, each stator slot is provided with a stator winding, a stator tooth is formed between every two stator slots, the inner diameter of the stator unit is increased from R1 to R2, and the stator split ratio, namely the inner diameter of the stator/the outer diameter of the stator, is more than or equal to 0.73; the groove depth of the stator groove is increased from h1 to h2, so that the area of the stator groove is increased by 10-20%; the tooth width of the stator teeth is increased from t1 to t2, so that the tooth width is increased by 10-20%. The invention increases the air gap area, increases the electromagnetic energy exchange area under the same magnetic flux density, reduces the weight of the stator core, reduces the motor loss, improves the motor torque density, improves the efficiency of the high-efficiency area which is more than 85 percent and improves the efficiency of the motor from 85 percent to 90 percent or more.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a high-efficiency permanent magnet synchronous motor.
Background
The permanent magnet synchronous motor has the characteristics of high torque density, high efficiency and good reliability, and is widely applied to a new energy electric vehicle driving system. The traditional permanent magnet synchronous motor has the advantages that the stator area is large, the yoke part is thick, the air gap energy exchange area is small, the area of a lower wire slot is small, the occupied area of a conductor in a stator slot is reduced, the resistance of the motor stator is relatively large, and the motor efficiency is influenced.
In addition, the rotor core of the permanent magnet synchronous motor is laminated on the rotating shaft through the rotor punching, and the rotor punching has a large number of high iron consumption areas due to the fact that the shaft diameter of the rotating shaft is small and the outer diameter of the rotor punching is large, iron core materials are wasted, and the motor efficiency is also influenced. Rotor grooving is commonly used to remove high iron loss areas, but this configuration does not provide good removal of the high iron loss areas and also results in wasted core material.
Disclosure of Invention
The invention provides a high-efficiency permanent magnet synchronous motor, which aims to solve the problems that the motor stator resistance is relatively large, the motor efficiency is influenced and the like due to the fact that the existing permanent magnet synchronous motor is large in stator area and thick in yoke.
The invention adopts the following technical scheme:
a high-efficiency permanent magnet synchronous motor comprises a stator unit, a rotor core unit and a shaft sleeve unit, wherein the rotor core unit is installed in the stator unit in a matching mode, the rotor core unit is installed on the shaft sleeve unit, a plurality of stator slots are arranged on the stator unit at equal intervals, a stator winding is arranged on each stator slot, a stator tooth is formed between every two stator slots, the inner diameter of the stator unit is increased from R1 to R2, and the stator split ratio, namely the inner diameter of a stator/the outer diameter of the stator, is larger than or equal to 0.73; the groove depth of the stator groove is increased from h1 to h2, so that the area of the stator groove is increased by 10-20%; the tooth width of the stator teeth is increased from t1 to t2, so that the tooth width is increased by 10-20%.
In a preferred embodiment, the stator unit is provided with 72 stator slots at equal intervals.
In a preferred embodiment, the stator winding is a single-layer winding, and conductors with different wire gauges are wound on the single-layer winding in a winding mode.
In a preferred embodiment, the shaft sleeve unit includes an iron core sleeve, a rotating shaft and a flat key, the iron core sleeve is connected with the rotating shaft through the flat key, and the iron core sleeve is further provided with a plurality of grooves.
In a preferred embodiment, key teeth are arranged on the outer surface wall of the core sleeve, key slots are correspondingly arranged on the inner wall of the rotor core unit, and the rotor core unit is press-fitted on the core sleeve through the key slots and the key teeth in a matching manner.
Further, the rotor core unit comprises a first section of rotor core, a second section of rotor core, a third section of rotor core and a fourth section of rotor core which are sequentially arranged from inside to outside, wherein the inner walls of the first section of rotor core, the second section of rotor core, the third section of rotor core and the fourth section of rotor core are respectively provided with a first key groove, a second key groove, a third key groove and a fourth key groove, and the outer surface wall of the iron core sleeve is correspondingly provided with key teeth.
Furthermore, the first key groove, the second key groove, the third key groove and the fourth key groove are respectively arranged along four directions corresponding to two perpendicular intersecting diameters of the same circumference, wherein the second key groove, the third key groove and the fourth key groove are respectively deviated from the positions theta/3, 2 theta/3 and theta angles.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
1. the invention increases the inner diameter of the stator unit to enable the stator splitting ratio to be more than or equal to 0.73 so as to increase the air gap area, thereby increasing the electromagnetic energy exchange area under the same magnetic flux density, reducing the weight of the stator core, reducing the motor loss and improving the motor torque density. The groove depth h1 is increased to h2, so that the area of the stator groove is increased by 10-20%, the sectional area of a conductor can be increased, and the resistance of the stator can be reduced; the tooth width t1 is increased to t2, so that the tooth width of the stator is increased by 10-20%, the magnetic circuit saturation can be reduced better, and the motor loss is reduced. Compared with the existing synchronous motor, the permanent magnet synchronous motor has the advantages that the efficiency ratio of the high-efficiency area is more than 85 percent and is improved from 85 percent to 90 percent or above, and the motor efficiency is improved.
2. The rotor core unit and the shaft sleeve unit are designed in a platform mode, so that the complexity of the motor process is reduced, the production process can be better controlled, and the consistency and the reliability of products are ensured.
3. The rotor core unit adopts sectional press mounting, and sectional oblique poles are carried out through the second key groove, the third key groove and the fourth key groove, and the oblique pole angles are theta/3, 2 theta/3 and theta respectively, so that the material consumption of the core is saved, the loss of the motor is reduced, and the torque pulsation of the motor is reduced.
Drawings
Fig. 1 is a front view of the high efficiency permanent magnet synchronous machine of the present invention.
Fig. 2 is a partial schematic view of a high split ratio stator unit of the present invention.
Fig. 3 is a schematic structural view of the bushing unit of the present invention.
Fig. 4 is a schematic view illustrating press-fitting of the bushing unit and the rotor core unit according to the present invention.
Fig. 5 is a front view of the rotor core unit of the present invention.
Fig. 6 is a right side view of fig. 5.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details. Well-known components, methods and processes are not described in detail below.
The utility model provides a high-efficient PMSM, refers to fig. 1, includes stator unit 1, rotor core unit 2 and axle sleeve unit 3, and stator unit 1 fit in installs rotor core unit 2, and rotor core unit 2 is installed on axle sleeve unit 3. The stator unit 1 is provided with a plurality of stator slots 11 at equal intervals, each stator slot 11 is provided with a stator winding, and a stator tooth 12 is formed between every two stator slots 11.
The efficient permanent magnet synchronous motor of the embodiment is described by adopting a motor with a stator outer diameter phi 368 platform and a rated power of 90kW, and the motor adopts a single-layer winding structure and is provided with 72 stator slots.
Referring to fig. 2, the stator split ratio of the stator outer diameter Φ 368 platform of the Y-series permanent magnet synchronous motor is 0.706, while the outer diameter R0 of the stator unit 1 of the present embodiment is 184mm, and the inner diameter is increased from R1 to R2, so that the stator split ratio, i.e. the stator inner diameter/the stator outer diameter, is greater than or equal to 0.73, specifically, is increased from 130mm to 135.8mm, and the stator split ratio is increased from 0.706 to 0.738.
With continued reference to fig. 2, the above-mentioned increase of the groove depth of the stator groove 11 from h1 to h2, specifically from 28mm to 32.5mm, increases the stator groove area by 13.6%, so that the conductor material can be increased to reduce the stator resistance. The tooth width of the stator teeth 12 is increased from t1 to t2, specifically from 6.1mm to 7.1mm, so that the tooth width is increased by 16.4%. Therefore, the saturation of a magnetic circuit can be better reduced, and the motor loss is reduced. Because the stator unit 1 adopts a single-layer winding structure, the using amount of insulating materials is reduced, and the occupation ratio of conductors in stator slots is improved. The single-layer winding is wound around different wire gauges, the sectional area of the conductor is increased, and the resistance of the stator is reduced by 25%, so that the loss of the motor is reduced.
The rotor core unit 2 adopts a built-in permanent magnet motor structure, the inner circle of the rotor core unit 2 is not directly pressed with the rotating shaft, but is positioned and pressed with the shaft sleeve unit through a key groove designed on the inner circle of the rotor core unit 2, so that the inner circle of the rotor core unit 2 is enlarged, and the rotor core material is reduced.
Referring to fig. 3 and 4, the bushing unit 3 includes a core sleeve 31, a rotating shaft 32, and a flat key 33, the core sleeve 31 and the rotating shaft 32 are coupled by the flat key 33 to form a bushing unit, and the core sleeve is provided with a light-weight design notch 311. The iron core sleeve 31 is provided with key teeth 312, and the shaft sleeve unit 3 is positioned with the key grooves of the rotor iron core unit through the key teeth 312 to form a rotor.
Referring to fig. 5 and 6, the rotor core unit 2 of the present embodiment adopts a segmented press-fitting method, and specifically includes a first segment of rotor core 21, a second segment of rotor core 22, a third segment of rotor core 23, and a fourth segment of rotor core 24, which are sequentially arranged from inside to outside, wherein the inner walls of the first segment of rotor core 21, the second segment of rotor core 22, the third segment of rotor core 23, and the fourth segment of rotor core 24 are all provided with a first key groove 211, a second key groove 221, a third key groove 231, and a fourth key groove 241, and the outer surface wall of the core sleeve 31 is correspondingly provided with key teeth. The first key groove 211, the second key groove 221, the third key groove 231 and the fourth key groove 241 are respectively arranged along four directions corresponding to two perpendicular intersecting diameters of the same circumference. The first key groove 211 is a key groove with an arc mark, and the second key groove 221, the third key groove 231 and the fourth key groove 241 deviate from the positions theta/3, 2 theta/3 and theta angles respectively, so that the material consumption of an iron core is saved, the loss of a motor is reduced, and the torque pulsation of the motor is reduced.
The rotor core unit and the shaft sleeve unit are designed in a platform mode, so that the complexity of the motor process is reduced, and the consistency and the reliability of products are guaranteed.
Of course, in other embodiments of the present invention, R1 can be increased to other R2 values, specifically, 1> R2/R0 ≧ 0.73. Similarly, the groove depth can be increased from h1 to other h2 values, so that the increase range of the stator groove area is 10-20%; the tooth width of the stator teeth can be increased from t1 to other t2 values, so that the tooth width of the stator teeth is increased within the range of 10-20%.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (8)
1. The utility model provides a high-efficient PMSM, includes stator unit, rotor core unit, axle sleeve unit, the stator unit fit in installs the rotor core unit, the rotor core unit install in on the axle sleeve unit, the equidistant a plurality of stator slot that is equipped with of stator unit is equipped with stator winding on every stator slot, forms a stator tooth between per two stator slots, its characterized in that: the inner diameter of the stator unit is increased from R1 to R2, so that the stator split ratio, namely the inner diameter of the stator/the outer diameter of the stator, is more than or equal to 0.73; the groove depth of the stator groove is increased from h1 to h2, so that the area of the stator groove is increased by 10-20%; the tooth width of the stator teeth is increased from t1 to t2, so that the tooth width is increased by 10-20%.
2. A high efficiency permanent magnet synchronous machine as recited in claim 1, wherein: the stator unit is provided with 72 stator slots at equal intervals.
3. A high efficiency permanent magnet synchronous machine as recited in claim 1, wherein: the stator winding is a single-layer winding.
4. A high efficiency permanent magnet synchronous machine as recited in claim 3, wherein: and conductors with different wire gauges are wound on the single-layer winding in a winding mode.
5. A high efficiency permanent magnet synchronous machine as recited in claim 1, wherein: the shaft sleeve unit comprises an iron core sleeve, a rotating shaft and a flat key, the iron core sleeve is connected with the rotating shaft through the flat key, and a plurality of grooves are further formed in the iron core sleeve.
6. A high efficiency permanent magnet synchronous machine as recited in claim 5, wherein: the rotor core unit is matched with the key teeth through the key grooves and the key teeth in a press fit mode on the iron core sleeve.
7. A high efficiency permanent magnet synchronous machine as recited in claim 6, wherein: the rotor core unit comprises a first section of rotor core, a second section of rotor core, a third section of rotor core and a fourth section of rotor core which are sequentially arranged from inside to outside, wherein the inner walls of the first section of rotor core, the second section of rotor core, the third section of rotor core and the fourth section of rotor core are respectively provided with a first key groove, a second key groove, a third key groove and a fourth key groove, and the outer surface wall of the iron core sleeve is correspondingly provided with key teeth.
8. A high efficiency permanent magnet synchronous machine as recited in claim 7, wherein: the first key groove, the second key groove, the third key groove and the fourth key groove are respectively arranged along four directions corresponding to two perpendicular intersecting diameters of the same circumference, wherein the second key groove, the third key groove and the fourth key groove are respectively deviated from the positions theta/3, 2 theta/3 and theta angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111609634.3A CN114244051A (en) | 2021-12-27 | 2021-12-27 | High-efficiency permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111609634.3A CN114244051A (en) | 2021-12-27 | 2021-12-27 | High-efficiency permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114244051A true CN114244051A (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111609634.3A Pending CN114244051A (en) | 2021-12-27 | 2021-12-27 | High-efficiency permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114244051A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022125718A1 (en) | 2022-10-05 | 2023-12-14 | Tk Elevator Innovation And Operations Gmbh | Electric motor device with rotor plates arranged in multiple stages and a correspondingly equipped rotor and its use, in particular in elevator systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100141080A1 (en) * | 2008-12-29 | 2010-06-10 | Tesla Motors, Inc. | Induction motor with improved torque density |
| EP2374198A2 (en) * | 2008-12-08 | 2011-10-12 | Robert Bosch GmbH | Electric machine having a claw-pole rotor |
| CN103078422A (en) * | 2012-10-22 | 2013-05-01 | 广东威灵电机制造有限公司 | Stator punching of single-phase capacitor-run motor |
| CN103858327A (en) * | 2011-10-14 | 2014-06-11 | 三菱电机株式会社 | Permanent magnet motor |
| CN106100162A (en) * | 2016-06-13 | 2016-11-09 | 卢清 | A kind of efficient motor stator punching |
| CN106787568A (en) * | 2017-03-31 | 2017-05-31 | 广东美芝制冷设备有限公司 | Compressor and air-conditioning |
| CN206759178U (en) * | 2017-05-24 | 2017-12-15 | 乐视汽车（北京）有限公司 | A kind of stator of motor, motor and vehicle |
| CN208522544U (en) * | 2018-05-29 | 2019-02-19 | 杭州精导智能科技有限公司 | A kind of permanent magnet direct driving motor |
| CN109617277A (en) * | 2018-12-21 | 2019-04-12 | 重庆赛力盟电机有限责任公司 | The oblique pole method of permanent magnet machine rotor |
| CN109672312A (en) * | 2019-01-30 | 2019-04-23 | 浙江博阳压缩机有限公司 | Permanent magnet synchronous motor |
| CN209419329U (en) * | 2019-01-31 | 2019-09-20 | 苏州优德通力科技有限公司 | A kind of compact-sized pump motor rotor punching |
| CN209948806U (en) * | 2019-06-03 | 2020-01-14 | 杭州精导智能科技有限公司 | Joint direct drive motor |
| CN210053261U (en) * | 2019-07-04 | 2020-02-11 | 厦门金龙汽车新能源科技有限公司 | Motor direct-oblique pole rotor sharing structure, motor rotor and permanent magnet synchronous motor |
-
2021
- 2021-12-27 CN CN202111609634.3A patent/CN114244051A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2374198A2 (en) * | 2008-12-08 | 2011-10-12 | Robert Bosch GmbH | Electric machine having a claw-pole rotor |
| US20100141080A1 (en) * | 2008-12-29 | 2010-06-10 | Tesla Motors, Inc. | Induction motor with improved torque density |
| CN103858327A (en) * | 2011-10-14 | 2014-06-11 | 三菱电机株式会社 | Permanent magnet motor |
| CN103078422A (en) * | 2012-10-22 | 2013-05-01 | 广东威灵电机制造有限公司 | Stator punching of single-phase capacitor-run motor |
| CN106100162A (en) * | 2016-06-13 | 2016-11-09 | 卢清 | A kind of efficient motor stator punching |
| CN106787568A (en) * | 2017-03-31 | 2017-05-31 | 广东美芝制冷设备有限公司 | Compressor and air-conditioning |
| CN206759178U (en) * | 2017-05-24 | 2017-12-15 | 乐视汽车（北京）有限公司 | A kind of stator of motor, motor and vehicle |
| CN208522544U (en) * | 2018-05-29 | 2019-02-19 | 杭州精导智能科技有限公司 | A kind of permanent magnet direct driving motor |
| CN109617277A (en) * | 2018-12-21 | 2019-04-12 | 重庆赛力盟电机有限责任公司 | The oblique pole method of permanent magnet machine rotor |
| CN109672312A (en) * | 2019-01-30 | 2019-04-23 | 浙江博阳压缩机有限公司 | Permanent magnet synchronous motor |
| CN209419329U (en) * | 2019-01-31 | 2019-09-20 | 苏州优德通力科技有限公司 | A kind of compact-sized pump motor rotor punching |
| CN209948806U (en) * | 2019-06-03 | 2020-01-14 | 杭州精导智能科技有限公司 | Joint direct drive motor |
| CN210053261U (en) * | 2019-07-04 | 2020-02-11 | 厦门金龙汽车新能源科技有限公司 | Motor direct-oblique pole rotor sharing structure, motor rotor and permanent magnet synchronous motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022125718A1 (en) | 2022-10-05 | 2023-12-14 | Tk Elevator Innovation And Operations Gmbh | Electric motor device with rotor plates arranged in multiple stages and a correspondingly equipped rotor and its use, in particular in elevator systems |
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Application publication date: 20220325 |
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