CN202260721U - Internal rotor structure of permanent magnet motor - Google Patents
Internal rotor structure of permanent magnet motor Download PDFInfo
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- CN202260721U CN202260721U CN2011204225716U CN201120422571U CN202260721U CN 202260721 U CN202260721 U CN 202260721U CN 2011204225716 U CN2011204225716 U CN 2011204225716U CN 201120422571 U CN201120422571 U CN 201120422571U CN 202260721 U CN202260721 U CN 202260721U
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Abstract
The utility model relates to an internal rotor structure of a permanent magnet motor, which comprises a rotor core, and a first strip-shaped permanent magnet, a second strip-shaped permanent magnet and a third strip-shaped permanent magnet which are the same as one another and evenly arranged in the rotor core, wherein the first strip-shaped permanent magnet is close to the outer surface of the rotor core; and the second strip-shaped permanent magnet and the third strip-shaped permanent magnet are arranged in a V-shaped structure and are positioned under the first strip-shaped permanent magnet. Preferentially, the two ends of the first, the second and the third strip-shaped permanent magnets are respectively provided with air magnetic isolation grooves; the axis of the first strip-shaped permanent magnet is arranged to be vertical to the symmetrical centre line of the V-shaped structure; and the outer surface of the rotor core is provided with a first slot and a second slot which are arranged relative to the symmetrical centre line of the V-shaped structure in a symmetrical way. The internal rotor structure of the permanent magnet motor is ingenious in design and simple in structure, and is capable of reducing the distortion rate of gap flux density wave form, the torque pulsation of a motor, the iron loss of the motor and the eddy-current loss of the permanent magnets as well as improving the efficiency of the motor, thus achieving the effects of reducing the vibration of the motor and the noise, improving the working performance of the motor and being suitable for large-scale popularization and application.
Description
Technical field
The utility model relates to electric drive system for electric vehicles drive motors part technical field, and particularly used for electric vehicle magneto technical field specifically is meant a kind of used for electric vehicle magneto built-in rotor structure.
Background technology
Along with increasing sharply of automobile pollution in the global range; The aggravation of motor vehicle exhaust emission; The resource and environment problem of bringing thus becomes increasingly conspicuous, therefore in the world under each big universities and colleges scientific research institution and car load factory one after another the research and development of new-energy automobile as the scientific research emphasis.Power drive system is the core of electric automobile, and motor wherein is the heart of power drive system, and its performance directly affects vehicle performance.Permagnetic synchronous motor adopts permanent magnet excitation on rotor; Has the power density height; Efficient is high, and the advantage that torque performance is good, these advantages have well met in the electric drive system for electric vehicles requirement to traction electric machine; Therefore, permagnetic synchronous motor becomes the first-selected type in current power drive system research and the application.As a complete unit, the most frequently used is surface-type rotor structure and built-in rotor structure two big classes.
Therefore the built-in rotor structure becomes present automobile permanent magnet motor and uses more rotor structure because its reluctance torque is outstanding.But; The built-in rotor magneto is when weak magnetic operating mode at a high speed; Because the weak magnetic control system of the degree of depth makes the air-gap field waveform of motor seriously distort; Cause torque pulsation big, the motor iron loss increases, decrease in efficiency, causes the increase of permanent magnet eddy current loss, rotor heating, permanent magnet to be prone to take place irreversible demagnetization simultaneously.Its radial component possibly cause stator core and built-in rotor to produce bigger vibrations and deformation.
At present, there is certain methods that built-in rotor structure is improved, though bigger after having certain effect to improve to other performance impact of motor, and processing technology is complicated, is not suitable for producing in batches.
Therefore, for the problems referred to above and the defective that solves existence, a kind of magneto built-in rotor structure need be provided; Adopt this structure; Can reduce the air gap flux density irregularity of wave form, reduce motor torque ripple, reduce motor iron loss and permanent magnet eddy current loss, improve electric efficiency; Reach and reduce motor oscillating, reduction anti noise, the service behaviour of raising motor.
The utility model content
The purpose of the utility model is to have overcome above-mentioned shortcoming of the prior art, and a kind of magneto built-in rotor structure is provided, and this magneto built-in rotor structural design is ingenious; Simple for structure, can reduce the air gap flux density irregularity of wave form, reduce motor torque ripple; Reduce motor iron loss and permanent magnet eddy current loss, improve electric efficiency; Reach and reduce motor oscillating, reduce anti noise, improve the service behaviour of motor, be suitable for large-scale promotion application.
To achieve these goals; The magneto built-in rotor structure of the utility model; Comprise rotor core; Be characterized in; Said magneto built-in rotor structure also comprises the first identical strip permanent magnet, the second strip permanent magnet and the 3rd strip-shaped permanent-magnet body that all is arranged in the said rotor core, and the said first strip permanent magnet is near the outer surface of said rotor core, and said second strip permanent magnet and said the 3rd strip-shaped permanent-magnet body are arranged in v-shaped structure and are positioned at the below of the said first strip permanent magnet.
Preferably, the two ends of the said first strip permanent magnet, the said second strip permanent magnet and said the 3rd strip-shaped permanent-magnet body are provided with the air magnet isolation tank.
Preferably, the axis of the said first strip permanent magnet is provided with the symmetrical center line of said v-shaped structure is vertical.
Preferably, offer first fluting and second fluting on the outer surface of described rotor core, said first fluting and said second fluting are symmetrical set with respect to the symmetrical center line of said v-shaped structure.
More preferably, the axis of the said first strip permanent magnet is provided with the symmetrical center line of said v-shaped structure is vertical, and said first fluting and said second fluting are symmetrical set with respect to the said first strip permanent magnet.
More preferably, said first fluting and said second fluting are half slot.
The beneficial effect of the utility model specifically is:
1, the magneto built-in rotor structure of the utility model comprises rotor core and all is arranged on the first identical strip permanent magnet, the second strip permanent magnet and the 3rd strip-shaped permanent-magnet body in the said rotor core; The said first strip permanent magnet is near the outer surface of said rotor core; Said second strip permanent magnet and said the 3rd strip-shaped permanent-magnet body are arranged in v-shaped structure and are positioned at the below of the said first strip permanent magnet, design ingenious, simple for structure; Can reduce the air gap flux density irregularity of wave form; The reduction motor torque ripple reduces motor iron loss and permanent magnet eddy current loss, improves electric efficiency, reaches to reduce motor oscillating, reduction anti noise; Improve the service behaviour of motor, be suitable for large-scale promotion application.
2, offer first fluting and second fluting on the outer surface of the rotor core of the magneto built-in rotor structure of the utility model, said first fluting and said second fluting are symmetrical set with respect to the symmetrical center line of said v-shaped structure, design ingenious; Simple for structure, can effectively improve the whole power density of motor, improve and torque capacity; Reduce motor volume and quality, reduce complete vehicle weight, can significantly improve the air gap flux density waveform; Reduce the operating torque pulsation of motor, thereby reduce shake and the noise in high-speed cruising of electric automobile when low cruise, improve level of comfort by bus; And can suitably alleviate the quality of rotor core; And increase the area of dissipation of rotor core, and reduce the rotor core temperature rise, be suitable for large-scale promotion application.
Description of drawings
Fig. 1 is the structural representation of a specific embodiment of the magneto built-in rotor structure of the utility model.
Embodiment
In order more to be expressly understood the technology contents of the utility model, the special following examples of lifting specify.Should be understood that embodiment is used to explain the utility model, rather than to the restriction of the utility model.
See also shown in Figure 1; The magneto built-in rotor structure of the utility model comprises rotor core 6; And all be arranged on the identical first strip permanent magnet 1, the second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3 in the said rotor core 6; The said first strip permanent magnet 1 is near the outer surface of said rotor core 6, and the said second strip permanent magnet 2 is arranged in v-shaped structure with said the 3rd strip-shaped permanent-magnet body 3 and is positioned at the below of the said first strip permanent magnet 1.Shape, size and polarity that so-called " the identical first strip permanent magnet 1, the second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3 " refers to three permanent magnets are all just the same.
In order to reduce leakage field, see also shown in Figure 1ly, in the specific embodiment of the utility model, the two ends of the said first strip permanent magnet 1, the said second strip permanent magnet 2 and said the 3rd strip-shaped permanent-magnet body 3 are provided with air magnet isolation tank 7.
The axis of the said first strip permanent magnet 1 can with vertical setting of symmetrical center line (not shown) of said v-shaped structure; Also can the out of plumb setting; See also shown in Figure 1; In the specific embodiment of the utility model, the axis of the said first strip permanent magnet 1 is provided with the symmetrical center line of said v-shaped structure is vertical.
In order further to improve performance, preferably, offer first fluting, 4 and second fluting 5 on the outer surface of described rotor core 6, said first fluting 4 is symmetrical set with said second fluting, 5 symmetrical center line with respect to said v-shaped structure.
Said first fluting 4 can be symmetrical set with respect to the said first strip permanent magnet 1 with said second fluting 5, also can asymmetricly be provided with.See also shown in Figure 1; In the specific embodiment of the utility model; The axis of the said first strip permanent magnet 1 is provided with the symmetrical center line of said v-shaped structure is vertical, and said first fluting 4 is symmetrical set with respect to the said first strip permanent magnet 1 with said second fluting 5.
Said first fluting 45 can be the fluting of any suitable shape with said second fluting, sees also shown in Figure 1ly, and in the specific embodiment of the utility model, said first fluting 4 is a half slot with said second fluting 5.
The first strip permanent magnet 1, the second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3 can be divided into four sections vertically, fill respectively during assembling, have reduced the difficulty of assembling and the cost of processing permanent magnet.
Every permanent magnet that extremely descends is made up of three block-shaped, size and all duplicate permanent magnet of polarity (i.e. the first strip permanent magnet 1, the second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3) in the magneto built-in rotor structure of the utility model; Permanent magnet is the in-line permanent magnet; Wherein the first strip permanent magnet 1 is pressed close to the outer surface of rotor core 6; But guarantee the mechanical strength of rotor core 6; The second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3 are arranged in v-shaped structure, are positioned at the downside of the first strip permanent magnet 1.
The size of the polar arc factor of permanent magnet, air magnet isolation tank 7 sizes and semicircular opening (i.e. the opening of first fluting, 4 and second fluting 5) is all analyzed by finite element software; The polar arc factor of permanent magnet, the arrangement of three permanent magnets and emulation mode are to guarantee that in-line permanent magnet (reach following " in-line permanent magnet " here and refer in particular to the first strip permanent magnet 1) polar arc factor is constant; Change the polar arc factor of V-arrangement permanent magnet (forming) by the second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3; Calculate the optimum polar arc factor of V-arrangement permanent magnet; Under the constant situation of the optimum polar arc factor of V-arrangement permanent magnet; Change in-line permanent magnet polar arc factor, confirm the pairing polar arc factor of last optimum air gap flux density.After treating that the optimum polar arc factor combination of in-line permanent magnet and V-arrangement permanent magnet is confirmed, simulation analysis is carried out in the big or small position of semicircular opening, purpose is to make the air gap flux density waveform near sinusoidal through changing the magnetic circuit magnetic resistance.Air magnet isolation tank 7 sizes will make leakage field reach minimum, but will consider the requirement of saturated and mechanical strength simultaneously.
The utlity model has following advantage:
1, through adopting the in-line permanent magnet structure that combines with the V-arrangement permanent magnet; Can reduce the air gap flux density irregularity of wave form; Reduce motor torque ripple; Reduce motor iron loss and permanent magnet eddy current loss, improve electric efficiency, reach and reduce motor oscillating, reduce anti noise, improve the service behaviour of motor.
2, establish half slot newly through center line both sides in rotor core 6; Can significantly improve the air gap flux density waveform; Reduce the operating torque pulsation of motor, thereby reduce shake and the noise in high-speed cruising of electric automobile when low cruise, improve level of comfort by bus.
3, through at the center line both sides of rotor core 6 increase half slot, can significantly reduce the eddy current loss of permanent magnet, reduce the possibility of permanent magnet demagnetization; Reduce the iron loss of motor, improve efficiency of motor.
4, the surface of rotor core 6 fluting can suitably alleviate the quality of rotor core 6, and increases the area of dissipation of rotor core 6, reduces the temperature rise of rotor core 6.
To sum up, the magneto built-in rotor structural design of the utility model is ingenious, simple for structure; Can reduce the air gap flux density irregularity of wave form; The reduction motor torque ripple reduces motor iron loss and permanent magnet eddy current loss, improves electric efficiency, reaches to reduce motor oscillating, reduction anti noise; Improve the service behaviour of motor, be suitable for large-scale promotion application.
In this specification, the utility model is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and the scope of the utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (6)
1. magneto built-in rotor structure; Comprise rotor core; It is characterized in that; Said magneto built-in rotor structure also comprises the first identical strip permanent magnet, the second strip permanent magnet and the 3rd strip-shaped permanent-magnet body that all is arranged in the said rotor core, and the said first strip permanent magnet is near the outer surface of said rotor core, and said second strip permanent magnet and said the 3rd strip-shaped permanent-magnet body are arranged in v-shaped structure and are positioned at the below of the said first strip permanent magnet.
2. magneto built-in rotor structure according to claim 1 is characterized in that, the two ends of the said first strip permanent magnet, the said second strip permanent magnet and said the 3rd strip-shaped permanent-magnet body are provided with the air magnet isolation tank.
3. magneto built-in rotor structure according to claim 1 is characterized in that the axis of the said first strip permanent magnet is provided with the symmetrical center line of said v-shaped structure is vertical.
4. magneto built-in rotor structure according to claim 1; It is characterized in that; Offer first fluting and second fluting on the outer surface of described rotor core, said first fluting and said second fluting are symmetrical set with respect to the symmetrical center line of said v-shaped structure.
5. magneto built-in rotor structure according to claim 4; It is characterized in that; The axis of the said first strip permanent magnet is provided with the symmetrical center line of said v-shaped structure is vertical, and said first fluting and said second fluting are symmetrical set with respect to the said first strip permanent magnet.
6. magneto built-in rotor structure according to claim 4 is characterized in that, said first fluting and said second fluting are half slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204225716U CN202260721U (en) | 2011-10-31 | 2011-10-31 | Internal rotor structure of permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204225716U CN202260721U (en) | 2011-10-31 | 2011-10-31 | Internal rotor structure of permanent magnet motor |
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| Publication Number | Publication Date |
|---|---|
| CN202260721U true CN202260721U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204225716U Expired - Fee Related CN202260721U (en) | 2011-10-31 | 2011-10-31 | Internal rotor structure of permanent magnet motor |
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| CN (1) | CN202260721U (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066714A (en) * | 2013-01-29 | 2013-04-24 | 合肥工业大学 | Method for reducing electromagnetic vibration noise of automobile claw-pole generator |
| CN103956873A (en) * | 2014-04-25 | 2014-07-30 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN103956874A (en) * | 2014-04-25 | 2014-07-30 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN104299749A (en) * | 2014-10-24 | 2015-01-21 | 广东电网有限责任公司东莞供电局 | V-shaped permanent magnet device for generating static gradient magnetic field |
| CN104600939A (en) * | 2015-02-04 | 2015-05-06 | 广东美芝制冷设备有限公司 | Permanent-magnet synchronous motor and compressor with same |
| CN105871098A (en) * | 2016-06-06 | 2016-08-17 | 上海特波电机有限公司 | Low-fluctuation asymmetric type permanent magnetic rotor for electric vehicle motor |
| CN106329774A (en) * | 2016-09-14 | 2017-01-11 | 南京航空航天大学 | Multilayer segmented built-in permanent magnet synchronous motor used for electric automobile driving |
| 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 |
| EP3136559A4 (en) * | 2014-04-25 | 2018-01-24 | United Automotive Electronic Systems Co., Ltd. | Permanent magnet synchronous motor and rotor thereof |
| CN108233574A (en) * | 2018-02-13 | 2018-06-29 | 安徽明腾永磁机电设备有限公司 | Rotor and permasyn morot |
| CN109067044A (en) * | 2018-11-01 | 2018-12-21 | 哈尔滨理工大学 | A kind of rotor structure improving magneto weak magnetism speed expansion performance |
| CN109921571A (en) * | 2019-01-31 | 2019-06-21 | 广州小鹏汽车科技有限公司 | A kind of motor and automobile for inhibiting motor electromagnetic noise and improving NVH |
| CN110277851A (en) * | 2019-07-23 | 2019-09-24 | 中达电机股份有限公司 | Mixed magneto rotor and its mixed magneto |
| CN110635598A (en) * | 2019-10-25 | 2019-12-31 | 上海电力大学 | Harmonic content weakening-based vibration suppression method for permanent magnet synchronous motor for electric vehicle |
| CN110959244A (en) * | 2017-08-01 | 2020-04-03 | 株式会社电装 | Magnetic generator for motor, soft magnetic iron core and method for manufacturing magnet |
-
2011
- 2011-10-31 CN CN2011204225716U patent/CN202260721U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066714A (en) * | 2013-01-29 | 2013-04-24 | 合肥工业大学 | Method for reducing electromagnetic vibration noise of automobile claw-pole generator |
| CN103956873A (en) * | 2014-04-25 | 2014-07-30 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN103956874A (en) * | 2014-04-25 | 2014-07-30 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| EP3136559A4 (en) * | 2014-04-25 | 2018-01-24 | United Automotive Electronic Systems Co., Ltd. | Permanent magnet synchronous motor and rotor thereof |
| CN104299749A (en) * | 2014-10-24 | 2015-01-21 | 广东电网有限责任公司东莞供电局 | V-shaped permanent magnet device for generating static gradient magnetic field |
| CN104299749B (en) * | 2014-10-24 | 2016-08-24 | 广东电网有限责任公司东莞供电局 | V-shaped permanent magnet device for generating static gradient magnetic field |
| CN104600939A (en) * | 2015-02-04 | 2015-05-06 | 广东美芝制冷设备有限公司 | Permanent-magnet synchronous motor and compressor with same |
| CN105871098A (en) * | 2016-06-06 | 2016-08-17 | 上海特波电机有限公司 | Low-fluctuation asymmetric type permanent magnetic rotor for electric vehicle motor |
| CN106329774A (en) * | 2016-09-14 | 2017-01-11 | 南京航空航天大学 | Multilayer segmented built-in permanent magnet synchronous motor used for electric automobile driving |
| CN110959244A (en) * | 2017-08-01 | 2020-04-03 | 株式会社电装 | Magnetic generator for motor, soft magnetic iron core and method for manufacturing magnet |
| 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 |
| CN108233574A (en) * | 2018-02-13 | 2018-06-29 | 安徽明腾永磁机电设备有限公司 | Rotor and permasyn morot |
| CN109067044A (en) * | 2018-11-01 | 2018-12-21 | 哈尔滨理工大学 | A kind of rotor structure improving magneto weak magnetism speed expansion performance |
| CN109921571A (en) * | 2019-01-31 | 2019-06-21 | 广州小鹏汽车科技有限公司 | A kind of motor and automobile for inhibiting motor electromagnetic noise and improving NVH |
| CN110277851A (en) * | 2019-07-23 | 2019-09-24 | 中达电机股份有限公司 | Mixed magneto rotor and its mixed magneto |
| CN110635598A (en) * | 2019-10-25 | 2019-12-31 | 上海电力大学 | Harmonic content weakening-based vibration suppression method for permanent magnet synchronous motor for electric vehicle |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20171031 |