CN104882978A - Low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure - Google Patents
Low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure Download PDFInfo
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- CN104882978A CN104882978A CN201510229007.5A CN201510229007A CN104882978A CN 104882978 A CN104882978 A CN 104882978A CN 201510229007 A CN201510229007 A CN 201510229007A CN 104882978 A CN104882978 A CN 104882978A
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Abstract
The invention relates to a low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure comprising a stator and a rotor. The stator employs pear-shaped flat-bottomed grooves. Irregular grooves are disposed on a position, corresponding to the center of a stator tooth portion, on the outer circumference of the stator. A rotor outer circumference is formed by a plurality of four-segment arcs. The rotor is provided with a plurality of grooves in which permanent magnets are embedded. The grooves are flat-bottomed V-shaped grooves. The tops of the left groove and the right groove of each V-shaped groove are provided wedge-shaped grooves for preventing the permanent magnets from moving. The permanent magnets are embedded in the left groove and the right groove. Reinforcing ribs are arranged between the tops of adjacent flat-bottomed V-shaped grooves. Compared with a conventional motor with a built-in V-shaped permanent magnet, the low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure is decreased in permanent magnet magnetic leakage, increased in the utilization rate of the permanent magnets, and provided with a salient pole effect, fully utilizes reluctance torque, improves motor efficiency and power density, improves gap flux density waveform, reduces cogging torque and torque ripple, and effectively reduces core loss and eddy-current loss.
Description
Technical field
The present invention relates to a kind of permanent magnet motor stator and rotor structure, the magneto of especially a kind of rotor built-in " V " font permanent magnet, is applicable to the application scenarios such as compressor, air-conditioning, electric tool and electric automobile, belongs to technical field of motors.
Background technology
Along with the development of rare earth permanent-magnetic material, the application of magneto in national economy every field is more and more extensive.There is due to permanent magnetic brushless the distinguishing features such as high efficiency, high power density, high reliability, and structural design is varied, therefore to the optimal design of permanent magnet motor structure, the performance such as can raises the efficiency to greatest extent.
Built-in V-type permanent magnet motor is a kind of common interior permanent magnet machines, and its operation principle is: the rotating magnetic field that stator winding electricity excitation produces, and the magnetic field interaction produced with permanent magnet built-in in rotor makes rotor rotate; Because permanent magnet is embedded into rotor, permanent magnet is surrounded by ferromagnetic material, easily causes magnetic interelectrode magnetic leakage, causes air gap wave distortion when motor rotates, and its radial component can cause the vibration between stator and rotor, and causes the decline of motor proper property.Therefore, reasonably design rotor magnetic circuit structural, rotor permanent magnet grooved and stator magnetic circuit structure, to raising electric efficiency and motor dynamics performance, there is important theory significance and economic worth.
Summary of the invention
Technical problem: the stator, rotor structures that the object of this invention is to provide a kind of built-in V-shaped magneto, adopt this structure can reduce core loss and eddy current loss, reduce torque pulsation, realize motor high efficiency, low noise and low torque ripple and run, improve the service behaviour of motor.
Technical scheme: the technical solution adopted in the present invention is by changing rotor outer circle structure and built-in permanent magnet grooved, and then improve air gap magnetic density waveform, and by optimizing stator grooved and outer circular shape, improve magnetic circuit path, effectively reduce electric machine iron core loss, eddy current loss and winding copper loss.A kind of low torque ripple high efficiency magneto stator, rotor structures of the present invention has following characteristics: rotor outer circle is joined end to end by several four arcses and forms, rotor is provided with corresponding several for embedding the groove of permanent magnet, at stator, some stator slots are set near rotor place, form stator tooth between every two stator slots, described stator slot grooved is the flat semi-enclosed slot of pyriform.
Described four arcs is two sections of first circular arcs caved inward, and the angle of rotor outer circle shared by it is α
3; Second circular arc of one section of longer outwardly convex, the angle of rotor outer circle shared by it is α
1; One section of three-arc compared with short outer lug, shared by it, the angle of rotor outer circle is α
2, α
2span be the α of 0.5 ~ 0.45 times
1, α
3span be the α of 0.01 ~ 0.1 times
1, and 2 α
3+ α
2+ α
1=180 °/p, p are number of pole-pairs.
Described first circular arc is made up of three sections of circular arcs, and wherein the 4th circular arc and the 6th circular arc are about angle α
3center line symmetrical, the arc angle of the 4th circular arc and the 6th circular arc is α
4, the angle that the center of circle of the 4th circular arc and the 6th circular arc is formed with the line in the rotor center of circle is respectively α
6.The center of circle of the 5th circular arc is at angle α
3center line, its arc angle is α
5, α
4span is the α of 8 ~ 16 times
1, α
5span is 100 ° ~ 300 °, α
6span is the α of 1.5 ~ 5 times
1.
Described permanent magnet trough is flat " V " font groove, and be embedded with permanent magnet at two, the left and right groove of " V " font groove, " V " font is 2 α to the angle that stator cylindrical opens
3+ α
1, the top of the right and left of " V " font of described flat " V " font groove is provided with the wedge-shaped slot preventing permanent magnet movement, and flat " V " font groove face width is O
1, the flat distance apart from the rotor center of circle is O
2, O
1with O
2ratio be 0.45 ~ 0.65.Be provided with the reinforcement strengthening rotor structure intensity and separated magnetic effect between the top of two adjacent flat " V " font grooves, its width is R
i, and R
ibe the O of 0.3 ~ 0.5 times
1.
Also comprise first irregular groove or the second irregular groove, the first irregular groove or the second irregular groove are distributed on the relative cylindrical of stator teeth, and shared by it, stator cylindrical arc angle is α
7,
The stator and rotor sructure of a kind of low torque ripple high efficiency magneto of the present invention, compared to existing technology, has following beneficial effect:
1) flat " V " font groove structure adopted, reduces the leakage field of permanent magnet, improves the utilance of permanent magnet; Add the saliency of motor, make full use of reluctance torque, improve efficiency and the power density of motor.
2) the some four arcses adopted form rotor outer circle structure, reduce cogging torque and torque pulsation, improve air gap magnetic density waveform, effectively reduce rotor eddy current loss and iron loss.
3) the stator cylindrical adopted has irregular groove, improves stator flux path, reduces stator eddy current loss and iron loss.The flat peariform slot structure adopted, takes full advantage of groove area, winding technique is more prone to, be beneficial to machine coiling, and improve yoke portion width, is conducive to reducing yoke portion iron loss.
Accompanying drawing explanation
Fig. 1 is rotor outer circle structure and permanent magnet grooved structure chart.
Fig. 2 is rotor outer circle circular arc 1 structure chart.
Fig. 3 is the first example structure figure of stator.
Fig. 4 is stator the second example structure figure
Fig. 5 is structure chart of the present invention.
In figure: 1 is the first circular arc, 2 is the second circular arc, and 3 is three-arc, and 4 is wedge-shaped slot, and 5 is the 4th circular arc, 6 is the 5th circular arc, and 7 is the 6th circular arc, and 8-1 is the first irregular groove, and 8-2 is the second irregular groove, 9 is stator slot, and 10 is flat " V " font groove, and 11 is reinforcement, and 12 is permanent magnet.
Embodiment
Below by way of embodiment, the present invention is further elaborated:
The present invention relates to a kind of low torque ripple high efficiency permanent magnet motor stator and rotor structure, rotor outer circle is joined end to end by several four arcses and forms, rotor is provided with corresponding several for embedding the groove of permanent magnet, at stator, some stator slots 9 are set near rotor place, stator teeth is formed between every two stator slots, the grooved of described stator slot 9 is the flat semi-enclosed slot of pyriform, under the prerequisite not affecting copper factor, by increasing yoke portion width by scabbling bottom peariform slot, reduce magnetic hysteresis and eddy current loss.
Described four arcs is two sections of first circular arcs 1 caved inward, and the angle of rotor outer circle shared by it is α
3; Second circular arc 2 of one section of longer outwardly convex, the angle of rotor outer circle shared by it is α
1; One section of three-arc 3 compared with short outer lug, shared by it, the angle of rotor outer circle is α
2, α
2span be 0.5 ~ 0.45 times of α
1, α
3span be 0.01 ~ 0.1 times of α
1, and 2 α
3+ α
2+ α
1=180 °/p, p are number of pole-pairs.
The first described circular arc 1, is made up of three sections of circular arcs, and wherein the 4th circular arc 5 and the 6th circular arc 7 are about angle α
3center line symmetrical, the arc angle of the 4th circular arc 5 and the 6th circular arc 7 is α
4, the angle angle that the center of circle of the 4th circular arc 5 and the 6th circular arc 7 is formed with the line in the rotor center of circle is respectively α
6.The center of circle of the 5th circular arc 6 is at angle α
3center line, its arc angle is α
5, α
4span is 8 ~ 16 times of α
1, α
5span is 100 ° ~ 300 °, α
6span is 1.5 ~ 5 times of α
1.
Described permanent magnet trough is flat " V " font groove 10, is embedded with permanent magnet at two, the left and right groove of " V " font groove.The top of the right and left of " V " font of described flat " V " font groove 10 is provided with the wedge-shaped slot 4 preventing permanent magnet movement, and flat " V " font groove 10 face width is O
1, the flat distance apart from the rotor center of circle is O
2, O
1with O
2ratio be 0.45 ~ 0.65.Be provided with the reinforcement 11 strengthening rotor structure intensity and separated magnetic effect between the top of two adjacent flat " V " font grooves 10, its width is R
i, and R
ibe the O of 0.3 ~ 0.5 times
1.
Irregular groove 8-1 or 8-2 on described stator, be arranged on the yoke portion cylindrical of stator tooth, shared by it, stator cylindrical arc angle is α
7, corresponding arc length is l, and its span is the stator facewidth of 1 ~ 2.5 times.
Illustrate below by a concrete example:
As shown in Figure 4, this embodiment is 6 pole 9 groove structures to one embodiment of the present of invention, and rotor outer circle arc is made up of 6 groups of 4 sections of circular arcs, cylindrical angle [alpha] shared by the first circular arc 1
3it is 2 °; Cylindrical angle [alpha] shared by second circular arc 2
1it is 37 °; Cylindrical angle [alpha] shared by three-arc 3
2it is 18 °.
The positional parameter α of three sections of circular arcs of the first described circular arc 1
4, α
5, α
6be respectively 28 °, 158 °, 6 °; Wherein the radius of circular arc 7 is 0.414mm.
Described flat " V " font groove, face width O bottom " V " font
1for 4.5mm, the described flat distance O to the rotor center of circle
2for 15mm.Described reinforcement 11 width R
ibfor 3mm, strengthen rotor strength, and have separated magnetic effect.
The yoke portion cylindrical of stator tooth is provided with the irregular groove 8-1 that 9 are positioned at teeth portion root, stator cylindrical angle [alpha] shared by it
7it is 18.1 °.Irregular groove area is 39.55mm
2.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a low torque ripple high efficiency permanent magnet motor stator and rotor structure, comprise stators and rotators, it is characterized in that: rotor outer circle is joined end to end by several four arcses and forms, rotor is provided with corresponding several for embedding the groove of permanent magnet, at stator, some stator slots are set near rotor place, form stator tooth between every two stator slots, the grooved of described stator slot (9) is the flat semi-enclosed slot of pyriform.
2. permanent magnet motor stator and rotor structure according to claim 1, is characterized in that: described four arcs comprises two sections of first circular arcs (1) caved inward, and the angle of rotor outer circle shared by it is α
3; Second circular arc (2) of one section of longer outwardly convex, the angle of rotor outer circle shared by it is α
1; One section of three-arc (3) compared with short outer lug, the angle of rotor outer circle shared by it is α
2, α
2span be 0.5 ~ 0.45 times of α
1, α
3span be 0.01 ~ 0.1 times of α
1, and 2 α
3+ α
2+ α
1=180 °/p, p are number of pole-pairs.
3. permanent magnet motor stator and rotor structure according to claim 2, it is characterized in that: the first circular arc (1) caved inward is made up of the 4th circular arc (5), the 5th circular arc (6) and the 6th circular arc (7) three sections of circular arcs, wherein the 4th circular arc (5) and the 6th circular arc (7) are about angle α
3center line symmetrical, the 4th circular arc (5) is α with the arc angle of the 6th circular arc (7)
4, the angle that the 4th circular arc (5) is formed with the line in the rotor center of circle respectively with the center of circle of the 6th circular arc (7) is α
6, the center of circle of the 5th circular arc (6) is at angle α
3center line, its arc angle is α
5, α
4span is 8 ~ 16 times of α
1, α
5span is 100 ° ~ 300 °, α
6span is 1.5 ~ 5 times of α
1.
4. permanent magnet motor stator and rotor structure according to claim 1, it is characterized in that: described permanent magnet trough is flat " V " font groove (10), be embedded with permanent magnet at two, the left and right groove of " V " font groove, " V " font is 2 α to the angle that stator cylindrical opens
3+ α
1, be provided with the wedge-shaped slot (4) preventing permanent magnet movement at the top of the right and left of " V " font of described flat " V " font groove (10), flat " V " font groove face width is O
1, the flat distance apart from the rotor center of circle is O
2, O
1with O
2ratio be 0.45 ~ 0.65, two adjacent flat " V " font groove (10) top between be provided with the reinforcement (11) that can realize strengthening rotor structure intensity and separated magnetic effect, its width is R
i, and R
iequal 0.3 ~ 0.5 times of O
1.
5. permanent magnet motor stator and rotor structure according to claim 1, it is characterized in that: also comprise and be arranged on the first irregular groove (8-1) on the yoke portion cylindrical of stator tooth or the second irregular groove (8-2), first irregular groove (8-1) or the second irregular groove (8-2) are distributed on the relative cylindrical of stator teeth, and shared by it, stator cylindrical arc angle is α
7, corresponding arc length is l, and its span is the stator facewidth of 1 ~ 2.5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229007.5A CN104882978B (en) | 2015-05-07 | 2015-05-07 | A kind of low torque ripple high efficiency permanent magnet motor stator and rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229007.5A CN104882978B (en) | 2015-05-07 | 2015-05-07 | A kind of low torque ripple high efficiency permanent magnet motor stator and rotor structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104882978A true CN104882978A (en) | 2015-09-02 |
| CN104882978B CN104882978B (en) | 2018-03-20 |
Family
ID=53950359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510229007.5A Active CN104882978B (en) | 2015-05-07 | 2015-05-07 | A kind of low torque ripple high efficiency permanent magnet motor stator and rotor structure |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105610257A (en) * | 2016-03-07 | 2016-05-25 | 广东美芝制冷设备有限公司 | Rotor core, rotor, motor and compressor |
| CN105634157A (en) * | 2016-03-20 | 2016-06-01 | 福建亚南电机有限公司 | Built-in high-power-density permanent magnet motor integrated to 8AT transmission box |
| CN105846627A (en) * | 2016-03-24 | 2016-08-10 | 东南大学 | Rotor structure for improving permanent magnet motor power and torque density |
| CN108173402A (en) * | 2018-01-21 | 2018-06-15 | 湖北西浦电机科技有限责任公司 | The salient pole synchronous electric machine of double eccentric arc field structures |
| TWI655828B (en) * | 2016-11-28 | 2019-04-01 | 日商日立江森自控空調有限公司 | Permanent magnet rotary electric machine and compressor using same |
| CN109831049A (en) * | 2019-01-24 | 2019-05-31 | 江苏大学 | V-shaped formula rotor structure for permanent magnet motor built in a kind of non-homogeneous air gap |
| CN109950989A (en) * | 2019-04-30 | 2019-06-28 | 中山大洋电机股份有限公司 | A kind of external rotor electric machine |
| CN110784029A (en) * | 2019-09-02 | 2020-02-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, motor and compressor |
| CN113544942A (en) * | 2019-03-22 | 2021-10-22 | 三菱电机株式会社 | Rotating electrical machine |
| CN113872349A (en) * | 2021-10-14 | 2021-12-31 | 广东美芝制冷设备有限公司 | Stator structure, motor structure, compressor structure and refrigeration plant |
| CN114665631A (en) * | 2022-03-29 | 2022-06-24 | 重庆隆鑫新能源科技有限公司 | Brushless motor rotor and brushless motor thereof |
| USD960086S1 (en) | 2017-07-25 | 2022-08-09 | Milwaukee Electric Tool Corporation | Battery pack |
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| US20130162063A1 (en) * | 2010-09-02 | 2013-06-27 | Sumitomo Bakelite Co., Ltd. | Fixing resin composition for use in rotor |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610257A (en) * | 2016-03-07 | 2016-05-25 | 广东美芝制冷设备有限公司 | Rotor core, rotor, motor and compressor |
| CN105610257B (en) * | 2016-03-07 | 2019-11-29 | 广东美芝制冷设备有限公司 | Rotor core, rotor, motor and compressor |
| CN105634157A (en) * | 2016-03-20 | 2016-06-01 | 福建亚南电机有限公司 | Built-in high-power-density permanent magnet motor integrated to 8AT transmission box |
| CN105846627A (en) * | 2016-03-24 | 2016-08-10 | 东南大学 | Rotor structure for improving permanent magnet motor power and torque density |
| TWI655828B (en) * | 2016-11-28 | 2019-04-01 | 日商日立江森自控空調有限公司 | Permanent magnet rotary electric machine and compressor using same |
| USD960086S1 (en) | 2017-07-25 | 2022-08-09 | Milwaukee Electric Tool Corporation | Battery pack |
| US11476527B2 (en) | 2017-07-25 | 2022-10-18 | Milwaukee Electric Tool Corporation | High power battery-powered system |
| US11462794B2 (en) | 2017-07-25 | 2022-10-04 | Milwaukee Electric Tool Corporation | High power battery-powered system |
| CN108173402A (en) * | 2018-01-21 | 2018-06-15 | 湖北西浦电机科技有限责任公司 | The salient pole synchronous electric machine of double eccentric arc field structures |
| CN109831049A (en) * | 2019-01-24 | 2019-05-31 | 江苏大学 | V-shaped formula rotor structure for permanent magnet motor built in a kind of non-homogeneous air gap |
| US11780061B2 (en) | 2019-02-18 | 2023-10-10 | Milwaukee Electric Tool Corporation | Impact tool |
| CN113544942A (en) * | 2019-03-22 | 2021-10-22 | 三菱电机株式会社 | Rotating electrical machine |
| CN113544942B (en) * | 2019-03-22 | 2023-09-29 | 三菱电机株式会社 | Rotary electric machine |
| CN109950989A (en) * | 2019-04-30 | 2019-06-28 | 中山大洋电机股份有限公司 | A kind of external rotor electric machine |
| CN109950989B (en) * | 2019-04-30 | 2024-03-19 | 中山大洋电机股份有限公司 | Outer rotor motor |
| CN110784029B (en) * | 2019-09-02 | 2021-07-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, motor and compressor |
| CN110784029A (en) * | 2019-09-02 | 2020-02-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, motor and compressor |
| CN113872349A (en) * | 2021-10-14 | 2021-12-31 | 广东美芝制冷设备有限公司 | Stator structure, motor structure, compressor structure and refrigeration plant |
| WO2023060830A1 (en) * | 2021-10-14 | 2023-04-20 | 广东美芝制冷设备有限公司 | Stator structure, electric motor structure, compressor structure, and refrigeration apparatus |
| CN114665631A (en) * | 2022-03-29 | 2022-06-24 | 重庆隆鑫新能源科技有限公司 | Brushless motor rotor and brushless motor thereof |
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Effective date of registration: 20191206 Address after: 215300 factory building a, No. 405 Jiande Road, Zhangpu Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Suzhou de MEIKO Motor Technology Co., Ltd. Address before: Four pailou Nanjing Xuanwu District of Jiangsu Province, No. 2 210096 Patentee before: Southeast University |