CN203896066U - Mixed magnetic steel rotor and permanent-magnet synchronous motor therewith - Google Patents
Mixed magnetic steel rotor and permanent-magnet synchronous motor therewith Download PDFInfo
- Publication number
- CN203896066U CN203896066U CN201320864652.0U CN201320864652U CN203896066U CN 203896066 U CN203896066 U CN 203896066U CN 201320864652 U CN201320864652 U CN 201320864652U CN 203896066 U CN203896066 U CN 203896066U
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- steel
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- magnet steel
- magnetic steel
- motor
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 184
- 239000010959 steel Substances 0.000 title claims abstract description 184
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 21
- 229910001172 neodymium magnet Inorganic materials 0.000 claims abstract description 20
- 230000004907 flux Effects 0.000 claims abstract description 13
- 230000011218 segmentation Effects 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000005347 demagnetization Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a mixed magnetic steel rotor and a permanent-magnet synchronous motor therewith. The magnetic steel of the rotor consists of two parts: an inner magnetic steel and an outer magnetic steel, wherein the inner magnetic steel is close to a motor shaft, and the outer magnetic steel is far from the motor shaft. The intrinsic coercive force of the outer magnetic steel is greater than that of the inner magnetic steel. The magnetizing directions of the inner and outer magnetic steels are the same, and the inner and outer magnetic steels are neodymium iron boron magnetic steels. The thickness of the outer magnetic steel is less than that of the inner magnetic steel. An outer part far from the motor shaft employs the neodymium iron boron magnetic steel with a high intrinsic coercive force, so the rotor of the motor has a good performance of demagnetization resistance. Meanwhile, an inner part close to the motor shaft employs the neodymium iron boron magnetic steel with a low intrinsic coercive force and a high residual magnetic flux density, thereby greatly reducing the manufacture cost of the motor on the basis that the motor performance is guaranteed. Meanwhile, the rotor employs a sectional-type structure, can reduce the eddy-current loss of permanent magnet materials, increases the efficiency of the motor, reduces the temperature increase, and further improves the performance of demagnetization resistance.
Description
Technical field
The utility model is relevant with the motor technology of new-energy automobile, particularly a kind of automobile permanent magnet synchronous motor that mixes magnetic steel rotor and have this rotor.
Background technology
Motor is a kind of calutron of realizing electric energy conversion or transmit according to the law of electromagnetic induction, its Main Function is to produce driving torque, power source as electrical equipment or various machineries, wherein, permagnetic synchronous motor has that torque rotary speed characteristic is good, efficiency is higher and control the advantages such as convenient with respect to other kind motor, therefore general electric automobile, especially electric automobile adopt permagnetic synchronous motor mostly.In the permanent magnet of various materials, the residual magnetic flux density of Nd-Fe-B magnet steel is high, magnetic induction coercive force is large, and maximum magnetic energy is high, be the best permanent magnetic material of current magnetic property, so generally adopt neodymium iron boron as permanent magnetic material in the automobile permanent magnet motor of electric automobile.
Because the operational environment of automobile motor is complicated, and special instructions for use, therefore there are some prerequisite performance requirements, as high torque density, high power density, can adapt to complicated operating condition and higher temperature running environment, and need to meet instantaneous short-circuit strategy of car load safety etc., these just require the magnet steel of rotor need to have very high magnetic property, anti-demagnetization capability, high-temperature stability etc., and then cause automobile permanent magnet synchronous motor need to select good magnet steel.At present, the price of magnet steel is very high, has occupied a big chunk cost that motor is produced, and along with the raising of magnet steel performance (being mainly anti-demagnetization performance), the price rises amplitude of magnet steel is larger.
For meeting more severe service condition, present automobile motor is general adopts all very high Nd-Fe-B magnet steels of single magnetic property and anti-demagnetization performance (HCJ), and this structure has greatly increased the manufacturing cost of motor.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of permagnetic synchronous motor that mixes magnetic steel rotor and have this rotor, can guarantee the service behaviour that permagnetic synchronous motor is good and meet more severe automobile-used service condition, and greatly having reduced again the cost of motor.
For solving the problems of the technologies described above, the mixing magnetic steel rotor that the utility model provides, magnet steel is comprised of interior magnet steel and outer steel two parts, and wherein interior magnet steel is near machine shaft, outer steel is away from machine shaft, and the HCJ of described outer steel is greater than the HCJ of interior magnet steel.
Simultaneously, the utility model also provides a kind of permagnetic synchronous motor that mixes magnetic steel rotor that has, comprise stator, rotor, machine shaft, electric machine stand and end cap, described stator comprises stator winding and stator core, described rotor comprises rotor core and magnet steel, and the magnet steel of described rotor is comprised of interior magnet steel and outer steel two parts, and wherein interior magnet steel is near machine shaft, outer steel is away from machine shaft, and the HCJ of described outer steel is greater than the HCJ of interior magnet steel.
In above-mentioned mixing magnetic steel rotor and permagnetic synchronous motor, interior magnet steel and outer steel are Nd-Fe-B magnet steel.
More excellent, the residual magnetic flux density of interior magnet steel is higher than the residual magnetic flux density of outer steel.
Preferably, the magnet steel of rotor is segmentation structure, and the every utmost point magnet steel being arranged in magnet steel groove is comprised of interior magnet steel and outer steel two parts.
Wherein, the magnetizing direction of interior magnet steel and outer steel is identical.
Better, the thickness of outer steel is less than the thickness of interior magnet steel.
Usefulness of the present utility model is:
1) magnet steel of rotor (integral type or segmented) is divided into inside and outside two parts, outside adopts the Nd-Fe-B magnet steel of HCJ high (anti-demagnetization performance is high) away from the part of machine shaft, the rotor of motor has good anti-demagnetization performance like this, simultaneously inner side adopts the low but Nd-Fe-B magnet steel that residual magnetic flux density is high of HCJ near the part of machine shaft, because the magnet steel price comparison that HCJ is low is cheap, on the basis that guarantees motor performance, can greatly reduce like this manufacturing cost of motor;
2) magnet steel of rotor can adopt segmentation structure, be applicable to the rotor of yi word pattern rotor, V-shape rotor or other form, can reduce the eddy current loss of permanent magnetic material, increase the efficiency of motor, reduce the temperature rise of rotor, further increase the anti-demagnetization performance of rotor;
3) rotor magnetic steel in permagnetic synchronous motor can suitably strengthen the thickness of inner side part magnet steel, can further improve like this output performance of motor, and very little on the impact of motor manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the first embodiment of mixing magnetic steel rotor of the present utility model;
Fig. 2 is the second embodiment of mixing magnetic steel rotor of the present utility model;
Fig. 3 is the structural representation of permagnetic synchronous motor of the present utility model.
Wherein description of reference numerals is as follows:
1 is stator winding; 2 is outer steel; 3 is interior magnet steel; 4 is stator core; 5 is machine shaft; 6 is rotor core; 7 is flat key; 8 is bearing; 9 is end cap; 10 is electric machine stand; 11 is resolver; 12 is magnet steel groove.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
In motor operation course, for example, when the magnet steel of rotor inside is subject to large stator current impact (instantaneous short-circuit impulse current), magnet steel in rotor can demagnetize, and first this demagnetization occurs in magnet steel conventionally near the Outboard Sections of rotor outer circle (away from machine shaft), and near the general rare demagnetization of inner side part of rotating shaft magnet steel or demagnetize afterwards.
Therefore, in order to guarantee the anti-demagnetization performance of rotor, the mixing magnetic steel rotor that the utility model provides, magnet steel is wherein comprised of interior magnet steel and outer steel two parts, wherein interior magnet steel is near machine shaft, outer steel is away from machine shaft, and the HCJ of outer steel is greater than the HCJ of interior magnet steel.In this mixing magnetic steel rotor, magnet steel can be integral type, can be also segmented (or sectional type), and its material is neodymium iron boron.
As shown in Figure 1, for mixing the first embodiment of magnetic steel rotor, this rotor is yi word pattern, comprise rotor core 6, interior magnet steel 3 and outer steel 2, wherein rotor core 6 is formed by some layers of silicon steel plate stacking, on this rotor core 6, is formed with magnet steel groove 12, and magnet steel is arranged in magnet steel groove 12.Magnet steel is fraction block structure, in the present embodiment, take ends of the earth magnet steel as example, every utmost point magnet steel is by forming near magnet steel 3 in the neodymium iron boron of machine shaft 5 with away from the neodymium iron boron outer steel 2 of machine shaft 5, wherein the HCJ of outer steel 2 is high, the HCJ of interior magnet steel 3 is low but residual magnetic flux density is high, can guarantee like this output performance and anti-demagnetization performance that motor is high, has greatly reduced again the manufacturing cost of motor because adopt the low magnet steel of HCJ.And the interior magnet steel 3 in every block of magnet steel is identical with the magnetizing direction of outer steel 2, in figure, shown in arrow, direction is magnetizing direction.
In addition, Figure 2 shows that the second embodiment that mixes magnetic steel rotor, the magnet steel of this rotor still adopts segmentation structure, and the 16 blocks of magnet steel of take are example, arranges as V-shape, and the identical two blocks of magnet steel of adjacent magnetizing direction form a utmost point, therefore this rotor is still ends of the earth magnet steel.Interior magnet steel 3 in next piece magnet steel of every utmost point is identical with the magnetizing direction of outer steel 2, and the direction of arrow marking in figure is its magnetizing direction.
The permagnetic synchronous motor that contains this mixing magnetic steel rotor in the utility model, comprise stator, rotor, electric machine stand 10, machine shaft 5, end cap 9, wherein stator comprises stator winding 1 and stator core 4, rotor comprises rotor core 6 and magnet steel, and magnet steel is by forming near magnet steel 3 in machine shaft 5 and the high neodymium iron boron of HCJ, the neodymium iron boron outer steel 2 that low away from machine shaft 5 and HCJ, residual magnetic flux density is high.Rotor core 6 is fixed on machine shaft 5 by flat key 7, machine shaft 5 is arranged on electric machine stand 10 and end cap 9 by bearing 8, its non-output is provided with resolver 11, and the structure of stator and mounting means are identical with traditional permagnetic synchronous motor, therefore repeat no more.
Mixing magnet steel of the present utility model is applicable to various forms of rotors, as the V-shape of the yi word pattern of Fig. 1, Fig. 2, is certainly also applicable to other forms of rotor, and this is easy to realize to those skilled in the art.
According to the demand of anti-demagnetization performance etc., requirement is high away from HCJ and the anti-demagnetization performance of the outer steel 2 of machine shaft 5, simultaneously, according to the demand of driving force etc., require that HCJ near the interior magnet steel 3 of machine shaft 5 is low, residual magnetic flux density is high, therefore, can make the thickness of interior magnet steel 3 be greater than the thickness of outer steel 2, the output performance of so further raising motor, but less on the manufacturing cost impact of motor.
Neodymium iron boron outer steel 2 shown in Fig. 1, Fig. 2 is adding man-hour with the interior magnet steel 3 of neodymium iron boron, the polarised direction of selected magnet steel should be consistent with the direction of arrow marking in Fig. 1, Fig. 2, after sharp processing and the antirust processing of plating, then by adding in selected pre-magnetizing direction embedding in man-hour magnet steel groove 12 separately.In order conveniently to magnetize, can as required rotor be divided into several sections and carry out again segmentation and magnetize, can certainly adopt direct complete machine to magnetize.
Rotor magnetic steel of the present utility model (integral type or segmented) is divided into inside and outside two parts, outside adopts the Nd-Fe-B magnet steel of HCJ high (anti-demagnetization performance is high) away from the part of machine shaft, the rotor of motor has good anti-demagnetization performance like this, simultaneously inner side adopts the low but Nd-Fe-B magnet steel that residual magnetic flux density is high of HCJ near the part of machine shaft, because the magnet steel price comparison that HCJ is low is cheap, on the basis that guarantees motor performance, can greatly reduce like this manufacturing cost of motor.
In addition, the magnet steel of rotor can adopt segmentation structure, is applicable to the rotor of yi word pattern rotor, V-shape rotor or other form, can reduce the eddy current loss of permanent magnetic material, increase the efficiency of motor, reduce the temperature rise of rotor, further increase the anti-demagnetization performance of rotor.
By specific embodiment, the utility model is had been described in detail above, this embodiment is only preferred embodiment of the present utility model, and it not limits the utility model.In the situation that not departing from the utility model principle; those of ordinary skills under the prerequisite of not making creative work to aspects such as the arrangements of the thickness of the thickness of outer steel, interior magnet steel, magnet steel by any modification, be equal to all other embodiment that the modes such as replacement, improvement obtain, in the technology category that all should be considered as protecting at the utility model.
Claims (12)
1. mix a magnetic steel rotor, it is characterized in that, the magnet steel of described rotor is comprised of interior magnet steel and outer steel two parts, and wherein interior magnet steel is near machine shaft, and outer steel is away from machine shaft, and the HCJ of described outer steel is greater than the HCJ of interior magnet steel.
2. mixing magnetic steel rotor according to claim 1, is characterized in that, described interior magnet steel and outer steel are Nd-Fe-B magnet steel.
3. mixing magnetic steel rotor according to claim 1, is characterized in that, the residual magnetic flux density of described interior magnet steel is higher than the residual magnetic flux density of outer steel.
4. mixing magnetic steel rotor according to claim 1, is characterized in that, the magnet steel of described rotor is segmentation structure, and every utmost point magnet steel is comprised of interior magnet steel and outer steel two parts.
5. mixing magnetic steel rotor according to claim 1, is characterized in that, the magnetizing direction of described interior magnet steel and outer steel is identical.
6. mixing magnetic steel rotor according to claim 1, is characterized in that, the thickness of described outer steel is less than the thickness of interior magnet steel.
7. one kind has the permagnetic synchronous motor that mixes magnetic steel rotor, comprise stator, rotor, machine shaft, electric machine stand and end cap, described stator comprises stator winding and stator core, described rotor comprises rotor core and magnet steel, it is characterized in that, the magnet steel of described rotor is comprised of interior magnet steel and outer steel two parts, and wherein interior magnet steel is near machine shaft, outer steel is away from machine shaft, and the HCJ of described outer steel is greater than the HCJ of interior magnet steel.
8. the permagnetic synchronous motor with mixing magnetic steel rotor according to claim 7, is characterized in that, described interior magnet steel and outer steel are Nd-Fe-B magnet steel.
9. the permagnetic synchronous motor with mixing magnetic steel rotor according to claim 7, is characterized in that, the residual magnetic flux density of described interior magnet steel is higher than the residual magnetic flux density of outer steel.
10. the permagnetic synchronous motor with mixing magnetic steel rotor according to claim 7, is characterized in that, the magnet steel of described rotor is segmentation structure, and every utmost point magnet steel is comprised of interior magnet steel and outer steel two parts.
11. permagnetic synchronous motors with mixing magnetic steel rotor according to claim 7, is characterized in that, the magnetizing direction of described interior magnet steel and outer steel is identical.
12. permagnetic synchronous motors with mixing magnetic steel rotor according to claim 7, is characterized in that, the thickness of described outer steel is less than the thickness of interior magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320864652.0U CN203896066U (en) | 2013-12-25 | 2013-12-25 | Mixed magnetic steel rotor and permanent-magnet synchronous motor therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320864652.0U CN203896066U (en) | 2013-12-25 | 2013-12-25 | Mixed magnetic steel rotor and permanent-magnet synchronous motor therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203896066U true CN203896066U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320864652.0U Expired - Lifetime CN203896066U (en) | 2013-12-25 | 2013-12-25 | Mixed magnetic steel rotor and permanent-magnet synchronous motor therewith |
Country Status (1)
| Country | Link |
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| CN (1) | CN203896066U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753212A (en) * | 2013-12-25 | 2015-07-01 | 联合汽车电子有限公司 | Hybrid magnetic steel rotor and permanent magnet synchronous motor provided with rotor |
| CN104901456A (en) * | 2015-06-19 | 2015-09-09 | 广东美芝制冷设备有限公司 | Motor and compressor having the same |
| CN107591919A (en) * | 2017-08-30 | 2018-01-16 | 广东威灵电机制造有限公司 | Rotor core and rotor |
| CN108696015A (en) * | 2017-03-30 | 2018-10-23 | Tdk株式会社 | Motor |
| CN109787439A (en) * | 2019-03-19 | 2019-05-21 | 上海电气风电集团有限公司 | Manufacturing method, rotor and the motor of rotor |
| CN110784082A (en) * | 2018-07-30 | 2020-02-11 | 本田技研工业株式会社 | Rotating electrical machine and vehicle equipped with rotating electrical machine |
| JP2020054022A (en) * | 2018-09-21 | 2020-04-02 | トヨタ自動車株式会社 | Permanent magnet-type motor |
| WO2020088085A1 (en) * | 2018-11-01 | 2020-05-07 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
-
2013
- 2013-12-25 CN CN201320864652.0U patent/CN203896066U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753212A (en) * | 2013-12-25 | 2015-07-01 | 联合汽车电子有限公司 | Hybrid magnetic steel rotor and permanent magnet synchronous motor provided with rotor |
| CN104901456A (en) * | 2015-06-19 | 2015-09-09 | 广东美芝制冷设备有限公司 | Motor and compressor having the same |
| CN108696015A (en) * | 2017-03-30 | 2018-10-23 | Tdk株式会社 | Motor |
| CN107591919A (en) * | 2017-08-30 | 2018-01-16 | 广东威灵电机制造有限公司 | Rotor core and rotor |
| CN107591919B (en) * | 2017-08-30 | 2020-11-27 | 美的威灵电机技术（上海）有限公司 | Rotor core and rotor |
| CN110784082A (en) * | 2018-07-30 | 2020-02-11 | 本田技研工业株式会社 | Rotating electrical machine and vehicle equipped with rotating electrical machine |
| CN110784082B (en) * | 2018-07-30 | 2021-07-06 | 本田技研工业株式会社 | Rotating electrical machine and vehicle equipped with rotating electrical machine |
| JP2020054022A (en) * | 2018-09-21 | 2020-04-02 | トヨタ自動車株式会社 | Permanent magnet-type motor |
| JP7020354B2 (en) | 2018-09-21 | 2022-02-16 | トヨタ自動車株式会社 | Permanent magnet motor |
| WO2020088085A1 (en) * | 2018-11-01 | 2020-05-07 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
| CN109787439A (en) * | 2019-03-19 | 2019-05-21 | 上海电气风电集团有限公司 | Manufacturing method, rotor and the motor of rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141022 |
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| CX01 | Expiry of patent term |