CN210577990U - Rotor punching sheet of permanent magnet synchronous motor - Google Patents
Rotor punching sheet of permanent magnet synchronous motor Download PDFInfo
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- CN210577990U CN210577990U CN201921454173.5U CN201921454173U CN210577990U CN 210577990 U CN210577990 U CN 210577990U CN 201921454173 U CN201921454173 U CN 201921454173U CN 210577990 U CN210577990 U CN 210577990U
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Abstract
The utility model discloses a PMSM rotor punching, including towards the piece body, be equipped with the shaft hole towards the center of piece body, have eight permanent magnet groove groups along circumferencial direction evenly distributed on towards the piece body, every group permanent magnet groove group comprises a V font permanent magnet groove and a line shape permanent magnet groove, the contained angle gamma value in V font permanent magnet groove is 90 and is less than or equal to gamma and is less than or equal to 120, the magnetic bridge width a value of V font permanent magnet groove interval is 1mm and is less than or equal to a and is less than or equal to 1.5mm, and the magnetic bridge width b value of separating between V font permanent magnet groove and the rotor excircle is 1mm and is less than or equal to b and is less than or equal to 1.7mm, magnetic bridge width c value of separating between line shape permanent magnet groove and the rotor excircle is 1mm and is less than or equal to c and is. The utility model discloses rotor punching simple structure has that power density is high, vibration and noise are little, salient pole rate is high, tooth's socket torque and torque fluctuation are little and is showing characteristics, is applicable to new energy automobile and uses.
Description
Technical Field
The utility model relates to a PMSM technical field, more specifically say, especially relate to a PMSM rotor punching.
Background
The permanent magnet synchronous motor has the characteristics of high torque density, low manufacturing cost, wide high efficiency area and the like, is the first choice of a driving motor of a new energy automobile such as pure electric vehicles, hybrid power vehicles, fuel cells and the like, but has a torque fluctuation phenomenon in the operation process due to the fact that tooth spaces exist in the structure of the permanent magnet synchronous motor and harmonic distortion exists in the armature reaction of a winding, and the torque fluctuation of the motor is transmitted to the whole power system through a rotor to generate vibration. Therefore, in order to ensure the comfort of passengers, the torque fluctuation of the permanent magnet synchronous motor for the new energy automobile needs to be limited within a reasonable range, and a new rotor structure is preferably designed on the basis of not increasing the manufacturing difficulty and improving the material cost so as to achieve the aims of reducing harmonic waves and reducing the torque fluctuation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to above-mentioned prior art not enough, provide one kind and can fold the rotor punching that the equipment constitutes permanent magnet synchronous machine rotor, this rotor punching has that power density is high, vibration and noise are little, salient pole rate is high, tooth's socket torque and torque ripple are little is showing characteristics, is applicable to new energy automobile and uses.
In order to achieve the above object, the utility model adopts the following technical scheme: a rotor punching sheet of a permanent magnet synchronous motor comprises a punching sheet body, wherein a shaft hole is formed in the center of the punching sheet body, eight permanent magnet groove groups are uniformly distributed on the punching sheet body along the circumferential direction, each permanent magnet groove group consists of a V-shaped permanent magnet groove and a linear permanent magnet groove, the included angle gamma of the V-shaped permanent magnet groove is more than or equal to 90 degrees and less than or equal to 120 degrees, the width a of a magnetic isolation bridge between the V-shaped permanent magnet grooves is more than or equal to 1mm and less than or equal to 1.5mm, the width b of the magnetic isolation bridge between the V-shaped permanent magnet groove and the outer circle of the rotor is more than or equal to 1mm and less than or equal to 1.7mm, and the width c of the magnetic isolation bridge between the linear permanent magnet groove and the outer circle of the rotor is more than or.
The permanent magnet grooves distributed in a V shape on the rotor punching sheet can increase Q-axis inductance, further increase salient pole rate, improve weak magnetic capacity of the motor and improve the highest running speed of the motor; the linear permanent magnet slots and the V-shaped permanent magnet slots are combined, so that the salient pole rate is improved, the reluctance torque and the air gap flux density are improved, and the torque output of the motor is further improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-punching sheet body; 2-shaft hole; 3-V-shaped permanent magnet slots; 4-a linear permanent magnet slot; 5-magnetic isolation bridge; 6-magnetism isolating holes; 7-axially cooling the weight-removing holes; 8-rivet holes.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention.
As shown in fig. 1, the utility model provides a pair of PMSM rotor punching, including towards piece body 1, be equipped with shaft hole 2 towards the center of piece body 1, have a plurality of V font permanent magnet grooves 3 and a line shape permanent magnet groove 4 towards piece body 1 last edge circumferencial direction evenly distributed, a permanent magnet groove group is constituteed with a line shape permanent magnet groove 4 in V font permanent magnet groove 3, and a permanent magnet groove group corresponds an utmost point, the utility model discloses the rotor punching is the eight polar structure, total eight permanent magnet groove groups promptly, every interval of group 45.
The permanent magnet grooves 3 distributed in a V shape on the rotor punching sheet can increase Q-axis inductance, further increase salient pole rate, improve the weak magnetic capacity of the motor and improve the highest running speed of the motor; the linear permanent magnet grooves 4 and the V-shaped permanent magnet grooves 3 are combined, so that the salient pole rate is improved, the reluctance torque and the air gap flux density are improved, and the torque output of the motor is further improved.
The included angle gamma of the V-shaped permanent magnet groove 3 can be adjusted according to the weak magnetic requirement of the motor, and the value of gamma is generally more than or equal to 90 degrees and less than or equal to 120 degrees; the width a of the magnetic isolation bridge 5 between the V-shaped permanent magnet grooves 3 and the width b of the magnetic isolation bridge 5 between the V-shaped permanent magnet grooves 3 and the outer circle of the rotor can effectively control magnetic leakage and increase the utilization rate of the permanent magnet, and generally the values of a is more than or equal to 1mm and less than or equal to 1.5mm and b is more than or equal to 1mm and less than or equal to 1.7mm according to the performance requirement and the strength requirement of the motor; the width c of the magnetic isolation bridge 5 between the linear permanent magnet groove 4 and the excircle of the rotor generally takes a value of c being more than or equal to 1mm and less than or equal to 1.5 mm.
the punching sheet body 1 is provided with diamond-shaped magnetism isolating holes 6 at the position of an included angle β of the V-shaped permanent magnet groove 3, the magnetism isolating holes 6 can effectively improve a Q-axis magnetic circuit and an air gap flux density waveform, and reduce cogging torque and torque fluctuation on the basis of increasing a salient pole rate, wherein an upper included angle alpha of the magnetism isolating holes 6 is associated with an included angle gamma of the V-shaped permanent magnet groove 3, the alpha is generally 5-10 degrees larger than the gamma, a lower included angle beta of the magnetism isolating holes 6 is also associated with the included angle gamma of the V-shaped permanent magnet groove 3, and the gamma is generally 10-20 degrees larger than the beta.
Eight fan-shaped axial cooling and weight-removing holes 7 are uniformly distributed around the shaft hole 2 of the punching sheet body 1, the hole spacing d of the axial cooling and weight-removing holes 7 is small as far as possible on the premise of meeting the requirements of the rotating speed and the strength of the motor, the weight-removing effect is improved, the power density is improved, and the value of d is generally not less than 3mm and not more than 5 mm.
In order to reduce the influence of welding process to the rotor iron loss, the utility model discloses a riveting process, eight rivet holes 8 of equipartition on the circumferencial direction towards piece body 1 have guaranteed good riveting effect, and rivet hole 8's size is adjusted according to stacking thickness and towards the piece size, generally takes value 3mm ~ 6 mm.
The utility model discloses under the condition that does not increase permanent magnet quantity and rotor material quantity, separate magnetic bridge and axial cooling through rational design and remove heavy hole and add and separate the magnetic hole, effectively improved permanent magnet utilization ratio and rotor salient pole rate, improved the power density and the high efficiency region of motor, reduced tooth's socket torque and torque fluctuation.
Claims (4)
1. The utility model provides a PMSM rotor punching, includes the punching body, its characterized in that: the punching sheet comprises a punching sheet body and is characterized in that a shaft hole is formed in the center of the punching sheet body, eight permanent magnet groove groups are uniformly distributed on the punching sheet body along the circumferential direction, each permanent magnet groove group consists of a V-shaped permanent magnet groove and a linear permanent magnet groove, the included angle gamma of the V-shaped permanent magnet groove is greater than or equal to 90 degrees and less than or equal to 120 degrees, the magnetic separation bridge width a between the V-shaped permanent magnet grooves is greater than or equal to 1mm and less than or equal to 1.5mm, the magnetic separation bridge width b between the V-shaped permanent magnet groove and the outer circle of a rotor is greater than or equal to 1mm and less than or equal to 1.7mm, and the magnetic separation bridge width c between the linear permanent magnet groove and the outer circle of the rotor is greater.
2. the rotor punching sheet of the permanent magnet synchronous motor as claimed in claim 1, wherein the punching sheet body is provided with diamond-shaped magnetism isolating holes at the position of the accessory of the included angle of the V-shaped permanent magnet groove, the relationship between the upper included angle β of the magnetism isolating holes and the included angle gamma of the V-shaped permanent magnet groove is that β is 5-10 degrees larger than gamma, and the relationship between the lower included angle beta of the magnetism isolating holes and the included angle gamma of the V-shaped permanent magnet groove is that gamma is 10-20 degrees larger than beta.
3. The rotor punching sheet of the permanent magnet synchronous motor as recited in claim 1, characterized in that: eight fan-shaped axial cooling and weight removing holes are uniformly distributed on the punching sheet body around the shaft hole, and the hole distance d of the axial cooling and weight removing holes is larger than or equal to 3mm and smaller than or equal to 5 mm.
4. The rotor punching sheet of the permanent magnet synchronous motor as recited in claim 1, characterized in that: eight rivet holes are uniformly distributed in the circumferential direction of the punching sheet body, and the size of each rivet hole is 3-6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921454173.5U CN210577990U (en) | 2019-09-03 | 2019-09-03 | Rotor punching sheet of permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921454173.5U CN210577990U (en) | 2019-09-03 | 2019-09-03 | Rotor punching sheet of permanent magnet synchronous motor |
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| Publication Number | Publication Date |
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| CN210577990U true CN210577990U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921454173.5U Active CN210577990U (en) | 2019-09-03 | 2019-09-03 | Rotor punching sheet of permanent magnet synchronous motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112583158A (en) * | 2020-11-30 | 2021-03-30 | 浙江金龙电机股份有限公司 | Novel embedded structure built-in permanent magnet motor rotor core |
| WO2022110865A1 (en) * | 2020-11-30 | 2022-06-02 | 珠海格力电器股份有限公司 | Motor rotor, permanent magnet motor and electric vehicle |
| CN114915070A (en) * | 2022-05-09 | 2022-08-16 | 山东大学 | Rotor based on double V-shaped permanent magnets and high-speed axial flux permanent magnet motor |
-
2019
- 2019-09-03 CN CN201921454173.5U patent/CN210577990U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112583158A (en) * | 2020-11-30 | 2021-03-30 | 浙江金龙电机股份有限公司 | Novel embedded structure built-in permanent magnet motor rotor core |
| WO2022110865A1 (en) * | 2020-11-30 | 2022-06-02 | 珠海格力电器股份有限公司 | Motor rotor, permanent magnet motor and electric vehicle |
| EP4254739A4 (en) * | 2020-11-30 | 2024-05-22 | Gree Electric Appliances, Inc. of Zhuhai | Motor rotor, permanent magnet motor and electric vehicle |
| CN114915070A (en) * | 2022-05-09 | 2022-08-16 | 山东大学 | Rotor based on double V-shaped permanent magnets and high-speed axial flux permanent magnet motor |
| CN114915070B (en) * | 2022-05-09 | 2024-01-09 | 山东大学 | Rotor based on double V-shaped permanent magnets and high-speed axial flux permanent magnet motor |
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