CN105281459A - Motor rotor structure, permanent magnet motor and compressor - Google Patents
Motor rotor structure, permanent magnet motor and compressor Download PDFInfo
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- CN105281459A CN105281459A CN201510438328.6A CN201510438328A CN105281459A CN 105281459 A CN105281459 A CN 105281459A CN 201510438328 A CN201510438328 A CN 201510438328A CN 105281459 A CN105281459 A CN 105281459A
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- permanent magnet
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- motor rotor
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Abstract
The invention provides a motor rotor structure. The motor rotor structure comprises a rotor core. The rotor core is provided with a plurality of permanent magnet grooves. The plurality of permanent magnet grooves are distributed around the center of the rotor in the circumferential direction of the rotor core. The permanent magnet grooves are internally provided with permanent magnets. Two ends part of each permanent magnet groove are respectively provided with a magnetic isolating hole. The magnetic isolating holes are communicated with the permanent magnet grooves. A plurality of grooves are formed in the peripheral circle of the rotor core at intervals. The invention further relates to a permanent magnet motor and a compressor. According to the invention, the two ends part of each permanent magnet groove are respectively provided with one magnetic isolating hole, the magnetic isolating holes are communicated with the permanent magnet grooves, and the formed in the peripheral circle of the rotor core at intervals, so that the magnetic flux distribution of the rotor core on the peripheral circle part is improved, magnetic lines entering a motor stator do not change suddenly, the cogging torque and the pulsation torque of the motor are reduced, the torque and the efficiency of the permanent magnet motor are improved, and the performance of the compressor is improved.
Description
Technical field
The present invention relates to technical field of motors, particularly relate to a kind of motor rotor construction and magneto and compressor.
Background technology
At present in permanent magnet synchronous motor, be 3n (n=1,2,3 to motor stator, 4 ...) groove, rotor is 2n (n=1,2,3,4 ...) magneto of pole, the magnetic flux distribution of the rotor core outer circumference iron core of magneto is uneven, and the magnetic line of force flowing into motor stator portion easily produces sudden change, exists and cannot improve the problem that motor is exerted oneself and material cost is higher.
Summary of the invention
In view of the present situation of prior art, the object of the present invention is to provide a kind of motor rotor construction and magneto and compressor, motor rotor construction is equipped with every bore at the both ends of each permanent magnet trough, is communicated with permanent magnet trough every bore, and the periphery circle of rotor core is arranged at intervals with multiple groove.It improves the magnetic flux distribution of rotor outer circle circumferential portion iron core, makes the magnetic line of force of inflow motor stator portion not produce sudden change, reduces cogging torque and the pulsating torque of motor, improves torque and the efficiency of magneto.For achieving the above object, technical scheme of the present invention is as follows:
A kind of motor rotor construction, comprise rotor core, described rotor core is provided with several permanent magnet trough, and permanent magnet trough described in several distributes along the circumference of described rotor core around the center of described rotor core, is provided with permanent magnet in described permanent magnet trough; Be equipped with every bore at the both ends of each described permanent magnet trough, be describedly communicated with described permanent magnet trough every bore, the periphery circle of described rotor core is arranged at intervals with multiple groove.
Wherein in an embodiment, the quantity of described groove is 4n, and n >=2, n is integer.
Wherein in an embodiment, the quantity of described groove is 3n, and n >=2, n is integer.
Wherein in an embodiment, the described center line every the relatively described permanent magnet trough of bore at each described permanent magnet trough both ends is symmetrical arranged.
Wherein in an embodiment, the depth H of described groove is 1-3 times of the electromagnetic steel plate thickness of described rotor core.
Wherein in an embodiment, described permanent magnet is rare-earth magnet.
The invention still further relates to a kind of magneto, comprise stator core and motor rotor construction, described stator core is arranged stator slot and winding, described motor rotor construction is the motor rotor construction described in above-mentioned arbitrary technical scheme.
Wherein in an embodiment, the width of described groove is L, and the width of rebate of described stator slot is W, wherein, and 0.5W<L<3W.
Wherein in an embodiment, the quantity of described stator slot is 3m, and the number of poles of described rotor core (100) is 2m, wherein m >=1, and m is integer.
The invention still further relates to a kind of compressor, it adopts interior permanent magnet machines, and described interior permanent magnet machines is the magneto described in above-mentioned arbitrary technical scheme.
The invention has the beneficial effects as follows:
Motor rotor construction of the present invention and magneto and compressor, motor rotor construction is equipped with every bore at the both ends of each permanent magnet trough, is communicated with permanent magnet trough every bore, and the periphery circle of rotor core is arranged at intervals with multiple groove.It improves the magnetic flux distribution of rotor outer circle circumferential portion iron core, the magnetic line of force of inflow motor stator portion is made not produce sudden change, reduce cogging torque and the pulsating torque of motor, improve torque and the efficiency of magneto, reduce motor ferromagnetic material cost, reduce the vibration after motor lift-launch compressor, noise, improve compressor performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of motor rotor construction embodiment one of the present invention;
Fig. 2 is the structural representation of motor rotor construction embodiment two of the present invention;
Fig. 3 coordinates schematic diagram with motor stator core for the motor rotor construction shown in Fig. 1;
Fig. 4 is the magnetic line of force distribution map at motor rotor construction groove position of the present invention;
Fig. 5 is the magnetic line of force distribution map of the rotor structure of prior art;
Fig. 6 is the cogging torque curve comparison figure of the magneto of magneto of the present invention and prior art.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, motor rotor construction of the present invention and magneto and compressor are further elaborated.Should be appreciated that specific embodiment described herein only for explaining the present invention, being not intended to limit the present invention.
Embodiment one
Referring to figs. 1 through Fig. 3, the motor rotor construction of one embodiment of the invention, comprises rotor core 100, and rotor core 100 is provided with several permanent magnet trough 101.The central shaft hole 105 of several permanent magnet trough 101 rotor iron cores 100 distributes along the circumference of rotor core 100, is provided with permanent magnet 102 in permanent magnet trough 101.Permanent magnet 102 is preferably rare-earth magnet, and permanent magnet 102 is excellent can be square permanent magnet.
In fig. 1 and 2, rotor core 100 is provided with six permanent magnet trough 101, all arranges one piece of permanent magnet 102 in each permanent magnet trough 101, preferably, rotor core 100 is also provided with air vent hole 106.Air vent hole 106 is set, is conducive to the heat radiation of rotor core 100.
Be equipped with every bore 103 at the both ends of each permanent magnet trough 101.Permanent magnet trough 101 is communicated with every bore 103.Shape every bore 103 can be Long Circle, ellipse or trapezoidal, also can be square or class is square.Be provided with every bore, effectively can reduce leakage field, improve the waveform of air-gap field, reduce the voltage high order harmonic component responded in the stator windings.
The periphery circle of rotor core 100 is arranged at intervals with multiple groove 104, and namely the center of multiple groove 104 rotor iron core 100 distributes along the circumference of rotor core 100.Wherein, the depth H of groove 104 is 1-3 times of electromagnetic steel plate (silicon steel sheet) thickness of rotor core 100.
The periphery circle of rotor core 100 arranges multiple groove 104, effectively can improve the magnetic flux distribution of rotor outer circle circumferential portion iron core like this, the magnetic line of force of inflow motor stator portion is made not produce sudden change, reduce cogging torque and the pulsating torque of motor, improve torque and the efficiency of magneto, also help the material cost reducing motor magnet.
As a kind of embodiment, the quantity of groove 104 is 4n, and n >=2, n is integer.Certainly, the quantity of groove 104 also can be 3n, and n >=2, n is integer.In Fig. 1, the quantity of groove 104 is 12.In Fig. 2, the quantity of groove 104 is 18.To the optimization that groove 104 distributes, the magnetic flux distribution of rotor outer circle circumferential portion iron core can be improved further, more improve torque and the efficiency of magneto.
As a kind of embodiment, the center line every the relatively described permanent magnet trough 101 of bore 103 at each permanent magnet trough 101 both ends is symmetrical arranged.Design like this can improve torque and the efficiency of magneto further.
Embodiment two
As shown in Figure 3, the magneto of one embodiment of the invention, comprises stator core 200 and motor rotor construction, stator core 200 is arranged stator slot 201 and winding, and described motor rotor construction is the motor rotor construction in enforcement one.
Wherein, the quantity of stator slot 201 is 3m, and the number of poles of rotor core 100 is 2m, m >=1, m is integer.Such as magneto can be 6-pole motor, and the quantity of stator slot 201 is 9.
Magneto in the present embodiment, groove 104 width of rotor core 100 is L, and the width of rebate of stator slot 201 is W, and wherein, L and W meets following relation: 0.5W<L<3W.Preferably, 0.5W<L<2W.The depth H of groove 104 is 1-3 times of electromagnetic steel plate (silicon steel sheet) thickness of rotor core 100.
Fig. 4 is the magnetic line of force distribution map at the motor rotor construction groove position of the present embodiment, and Fig. 5 is the magnetic line of force distribution map of the rotor structure of prior art; From figure, contrast can find out that the rotor structure groove part of the present embodiment effectively can improve the magnetic flux distribution of rotor outer circle circumferential portion iron core, makes the magnetic line of force of inflow motor stator portion not produce sudden change.
Fig. 6 is the cogging torque curve comparison figure of the magneto of the present embodiment and the magneto of prior art.The continuous broken line that in Fig. 6, cogging torque amplitude (in figure height) is larger is the cogging torque curve of the magneto of prior art, and the smaller continuous broken line of cogging torque amplitude (in figure height) is the cogging torque curve of the magneto of the present embodiment, be not difficult to find out improvement from Fig. 6 after, cogging torque is significantly low subtracts, be conducive to reducing the torque pulsation of motor under rated load, reduce the harmonic wave of current of electric, the efficiency of lifting motor, low noise, the vibration subtracting motor.
Magneto in the present embodiment, rotor structure can improve the magnetic flux distribution of rotor outer circle circumferential portion iron core, the magnetic line of force of inflow motor stator portion is made not produce sudden change, thus reduce cogging torque and the pulsating torque of motor, noise after motor can be made to carry compressor, vibration reduce, and improve compressor performance.
Embodiment three
The compressor of one embodiment of the invention, it adopts interior permanent magnet machines, and described interior permanent magnet machines is the magneto in embodiment two.Compressor is prior art except above-mentioned magneto, repeats no more herein.Compressor, owing to have employed the magneto in embodiment two, therefore also achieves same Advantageous Effects.
The motor rotor construction of each embodiment and magneto and compressor above, motor rotor construction is equipped with every bore at the both ends of each permanent magnet trough, is communicated with permanent magnet trough every bore, and the periphery circle of rotor core is arranged at intervals with multiple groove.It improves the magnetic flux distribution of rotor outer circle circumferential portion iron core, the magnetic line of force of inflow motor stator portion is made not produce sudden change, reduce cogging torque and the pulsating torque of motor, improve torque and the efficiency of magneto, reduce motor ferromagnetic material cost, reduce the vibration after motor lift-launch compressor, noise, improve compressor performance.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a motor rotor construction, it is characterized in that, comprise rotor core (100), described rotor core (100) is provided with several permanent magnet trough (101), permanent magnet trough described in several (101) distributes along the circumference of described rotor core (100) around the center of described rotor core (100), is provided with permanent magnet (102) in described permanent magnet trough (101); Be equipped with every bore (103) at the both ends of each described permanent magnet trough (101), describedly be communicated with described permanent magnet trough (101) every bore (103), the periphery circle of described rotor core (100) is arranged at intervals with multiple groove (104).
2. motor rotor construction according to claim 1, is characterized in that, the quantity of described groove (104) is 4n, and n >=2, n is integer.
3. motor rotor construction according to claim 1, is characterized in that, the quantity of described groove (104) is 3n, and n >=2, n is integer.
4. motor rotor construction according to claim 1, is characterized in that, the described center line every the relatively described permanent magnet trough (101) of bore (103) at each described permanent magnet trough (101) both ends is symmetrical arranged.
5. the motor rotor construction according to any one of claim 1-4, is characterized in that, the depth H of described groove (104) is 1-3 times of the electromagnetic steel plate thickness of described rotor core (100).
6. the motor rotor construction according to any one of claim 1-4, is characterized in that, described permanent magnet (102) is rare-earth magnet.
7. a magneto, comprises stator core (200) and motor rotor construction, described stator core is arranged stator slot (201) and winding, and described motor rotor construction is the motor rotor construction described in any one of claim 1-6.
8. magneto according to claim 7, is characterized in that, the width of described groove (104) is L, and the width of rebate of described stator slot (201) is W, wherein, and 0.5W<L<3W.
9. the magneto according to claim 7 or 8, is characterized in that, the quantity of described stator slot (201) is 3m, and the number of poles of described rotor core (100) is 2m, wherein m >=1, and m is integer.
10. a compressor, it adopts interior permanent magnet machines, it is characterized in that, described interior permanent magnet machines is the magneto described in any one of claim 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510438328.6A CN105281459A (en) | 2015-07-23 | 2015-07-23 | Motor rotor structure, permanent magnet motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510438328.6A CN105281459A (en) | 2015-07-23 | 2015-07-23 | Motor rotor structure, permanent magnet motor and compressor |
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| CN105281459A true CN105281459A (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510438328.6A Pending CN105281459A (en) | 2015-07-23 | 2015-07-23 | Motor rotor structure, permanent magnet motor and compressor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394922A (en) * | 2017-08-24 | 2017-11-24 | 智车优行科技（上海）有限公司 | Built-in permanent magnet motor rotor and magneto |
| 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 |
| CN110022016A (en) * | 2019-04-24 | 2019-07-16 | 广东金霸智能科技股份有限公司 | A kind of rotor chip and its rotor and motor |
| CN110277852A (en) * | 2019-07-25 | 2019-09-24 | 东莞市深鹏电子有限公司 | A kind of production method of rotor and rotor |
| CN111052546A (en) * | 2017-06-19 | 2020-04-21 | 日产自动车株式会社 | Rotor of rotating electric machine |
| CN111555482A (en) * | 2020-05-29 | 2020-08-18 | 重庆长安新能源汽车科技有限公司 | Permanent magnet type rotating motor |
| 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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| CN101330231A (en) * | 2007-06-19 | 2008-12-24 | 上海海立（集团）股份有限公司 | Permanent magnet motor stator and rotor for compressor |
| CN201191793Y (en) * | 2008-06-02 | 2009-02-04 | 林增禄 | Cast steel rotor of insert type magnetic shielding structure |
| JP4319562B2 (en) * | 2004-02-27 | 2009-08-26 | 三菱電機株式会社 | Synchronous motor, hermetic compressor and fan motor |
| JP2013099193A (en) * | 2011-11-04 | 2013-05-20 | Suzuki Motor Corp | Electric rotary machine |
| CN204886463U (en) * | 2015-07-23 | 2015-12-16 | 珠海凌达压缩机有限公司 | Electric motor rotor structure and permanent -magnet machine and compressor |
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| JP4319562B2 (en) * | 2004-02-27 | 2009-08-26 | 三菱電機株式会社 | Synchronous motor, hermetic compressor and fan motor |
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| CN101330231A (en) * | 2007-06-19 | 2008-12-24 | 上海海立（集团）股份有限公司 | Permanent magnet motor stator and rotor for compressor |
| CN201191793Y (en) * | 2008-06-02 | 2009-02-04 | 林增禄 | Cast steel rotor of insert type magnetic shielding structure |
| JP2013099193A (en) * | 2011-11-04 | 2013-05-20 | Suzuki Motor Corp | Electric rotary machine |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111052546A (en) * | 2017-06-19 | 2020-04-21 | 日产自动车株式会社 | Rotor of rotating electric machine |
| CN111052546B (en) * | 2017-06-19 | 2022-06-24 | 日产自动车株式会社 | Rotor of rotating electric machine |
| CN107394922A (en) * | 2017-08-24 | 2017-11-24 | 智车优行科技（上海）有限公司 | Built-in permanent magnet motor rotor and magneto |
| CN107394922B (en) * | 2017-08-24 | 2023-11-14 | 智车优行科技（上海）有限公司 | Built-in permanent magnet motor rotor and permanent magnet motor |
| 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 |
| CN110022016A (en) * | 2019-04-24 | 2019-07-16 | 广东金霸智能科技股份有限公司 | A kind of rotor chip and its rotor and motor |
| CN110022016B (en) * | 2019-04-24 | 2024-05-28 | 广东金霸智能科技股份有限公司 | Rotor chip and rotor and motor thereof |
| CN110277852A (en) * | 2019-07-25 | 2019-09-24 | 东莞市深鹏电子有限公司 | A kind of production method of rotor and rotor |
| CN111555482A (en) * | 2020-05-29 | 2020-08-18 | 重庆长安新能源汽车科技有限公司 | Permanent magnet type rotating motor |
| 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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Application publication date: 20160127 |