CN112564445B - Permanent magnet synchronous motor, electric automobile and power upgrading method of permanent magnet synchronous motor - Google Patents
Permanent magnet synchronous motor, electric automobile and power upgrading method of permanent magnet synchronous motor Download PDFInfo
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- CN112564445B CN112564445B CN202011437729.7A CN202011437729A CN112564445B CN 112564445 B CN112564445 B CN 112564445B CN 202011437729 A CN202011437729 A CN 202011437729A CN 112564445 B CN112564445 B CN 112564445B
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- rotor
- permanent magnet
- stator
- magnet synchronous
- rotor core
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The application discloses a permanent magnet synchronous motor, an electric automobile and a power upgrading method of the permanent magnet synchronous motor. A permanent magnet synchronous motor comprising: stator (1) and holding are in stator (1) with the coaxial rotor (2) of stator (1), rotor (2) include with the coaxial rotor shaft (21) of stator (1) and cover are established first rotor core (22) on rotor shaft (21), the axial length of stator (1) is greater than the axial length of first rotor core (22). The rotor core space is reserved in this application for after the vehicle is sold, can be through increasing rotor core in order to promote the power of motor, need not to carry out the whole change to the motor, greatly reduced the cost that promotes vehicle power.
Description
Technical Field
The application relates to the technical field of automobile correlation, in particular to a permanent magnet synchronous motor, an electric automobile and a power upgrading method of the permanent magnet synchronous motor.
Background
The existing new energy automobile, namely the electric automobile, generally adopts a permanent magnet synchronous motor as a power source.
In the using process, part of customers have the demand of improving the power of the automobile. Because the power source of the new energy automobile is a permanent magnet synchronous motor, the permanent magnet synchronous motor serving as the automobile power source needs to be upgraded when the automobile power is upgraded.
As shown in fig. 1 to 3, the existing motor adopts a structural form: the rotor 2 ' is accommodated in the stator 1 ', the rotor 2 ' comprises a rotor rotating shaft 21 ' and a rotor core 22 ', and the stator 1 ' and the rotor core 22 ' have the same length.
Therefore, the power of the existing permanent magnet synchronous motor cannot be upgraded after the motor is shipped from a factory, and when a user wants to upgrade the power of the motor after the motor is sold, the user can only replace the motor, so that the cost is very high.
Disclosure of Invention
Therefore, it is necessary to provide a permanent magnet synchronous motor, an electric vehicle, and a power upgrading method for the permanent magnet synchronous motor, for solving the technical problem of high cost of upgrading the power of the electric vehicle in the prior art.
The application provides a permanent magnet synchronous motor, includes: stator and holding are in the stator with the coaxial rotor of stator, the rotor include with the coaxial rotor pivot of stator and cover are established rotor shaft is epaxial first rotor core, the axial length of stator is greater than first rotor core's axial length.
Further, the rotor further includes: the cover is established the first bearing and the second bearing at rotor pivot both ends, first bearing sets up the first side of first rotor core is contradicted first rotor core, the second bearing sets up the second side of first rotor core, just the second bearing with preset the space has between the second side of first rotor core.
Furthermore, the rotor still establishes including the cover the epaxial sleeve of rotor rotation, the sleeve sets up the second bearing with between the second side of first rotor core, just the sleeve is contradicted respectively the second bearing with the second side of first rotor core.
Still further, the diameter of the sleeve is smaller than the diameter of the first rotor core.
Still further, the diameter ratio of the diameter of the sleeve to the diameter of the first rotor core is 50% or less.
Still further, the sleeve is a metal sleeve.
Still further, a distance between the first bearing and the second bearing coincides with an axial length of the stator.
The application provides an electric automobile, including as before permanent magnet synchronous machine.
The application provides a method for upgrading the power of a permanent magnet synchronous motor of an electric automobile, which comprises the following steps:
taking out a rotor from a stator of the permanent magnet synchronous motor of the electric vehicle;
sleeving a second rotor iron core on the rotor rotating shaft of the rotor;
and assembling the rotor assembled with the second rotor core into the stator to finish the power upgrade of the permanent magnet synchronous motor.
Further, the first rotor core comprises a silicon steel sheet and magnetic steel, and the second rotor core comprises a silicon steel sheet and magnetic steel which are consistent with the first rotor core.
The rotor core space is reserved in this application for after the vehicle is sold, can be through increasing rotor core in order to promote the power of motor, need not to carry out the whole change to the motor, greatly reduced the cost that promotes vehicle power.
Drawings
Fig. 1 is a schematic structural diagram of a prior art permanent magnet synchronous motor;
FIG. 2 is a schematic structural view of a rotor of a prior art permanent magnet synchronous motor;
FIG. 3 is a cross-sectional view of a rotor of a prior art permanent magnet synchronous machine;
fig. 4 is a schematic structural diagram of a permanent magnet synchronous motor according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of power upgrade of a permanent magnet synchronous motor according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a rotor of a permanent magnet synchronous machine according to an embodiment of the present application;
FIG. 7 is a cross-sectional view of a rotor of a permanent magnet synchronous machine according to one embodiment of the present application;
fig. 8 is a schematic structural diagram of a sleeve of a permanent magnet synchronous motor according to an embodiment of the present application;
FIG. 9 is a cross-sectional view A-A of FIG. 8;
fig. 10 illustrates a method for upgrading power of a permanent magnet synchronous motor of an electric vehicle according to the present application.
Description of reference numerals:
1' -a stator; 2' -a rotor; 21' -a rotor shaft; 22' -a rotor core; 1-a stator; 2-a rotor; 21-rotor shaft; 22-a first rotor core; 23-a first bearing; 24-a second bearing; 25-a sleeve; 26-second rotor core.
Detailed Description
The present application will now be described in further detail with reference to the accompanying drawings and specific examples.
As shown in fig. 4, a permanent magnet synchronous motor according to an embodiment of the present application includes: stator 1 and holding are in the stator 1 with the coaxial rotor 2 of stator 1, rotor 2 include with the coaxial rotor shaft 21 of stator 1 and cover are established first rotor core 22 in the rotor shaft 21, the axial length of stator 1 is greater than the axial length of first rotor core 22.
Specifically, the permanent magnet synchronous motor of the present embodiment adopts a scheme that the length of the stator is greater than that of the rotor. Wherein the axial length of the stator 1 is greater than the axial length of the first rotor core 22.
At the time of delivery to the customer, the permanent magnet synchronous motor includes only the first rotor core 22. As shown in fig. 5, when the user needs to increase the motor power, it is only necessary to increase the second rotor core 26 after sale, that is, to increase the length of the rotor core of the entire rotor 2, so as to increase the motor power.
Rotor core space is reserved to this application for after the vehicle is sold, can be through increasing rotor core in order to promote the power of motor, need not to carry out the whole change to the motor, greatly reduced promote the cost of vehicle power
As shown in fig. 4 to 9, a permanent magnet synchronous motor according to an embodiment of the present application includes: the stator comprises a stator 1 and a rotor 2 which is accommodated in the stator 1 and is coaxial with the stator 1, wherein the rotor 2 comprises a rotor rotating shaft 21 which is coaxial with the stator 1, a first rotor core 22 which is sleeved on the rotor rotating shaft 21, a first bearing 23 and a second bearing 24 which are sleeved on two ends of the rotor rotating shaft 21, and a sleeve 25 which is sleeved on the rotor rotating shaft 21, and the axial length of the stator 1 is greater than that of the first rotor core 22;
the first bearing 23 is disposed on a first side of the first rotor core 22 and abuts against the first rotor core 22, the second bearing 24 is disposed on a second side of the first rotor core 22, a preset gap is formed between the second bearing 24 and the second side of the first rotor core 22, and a distance between the first bearing 23 and the second bearing 24 is consistent with an axial length of the stator 1;
the sleeve 25 is disposed between the second bearing 24 and the second side of the first rotor core 22, and the sleeve 25 respectively abuts against the second bearing 24 and the second side of the first rotor core 22;
the sleeve 25 is a metal sleeve, the diameter of the sleeve 25 is smaller than that of the first rotor core 22, and the diameter ratio of the diameter of the sleeve 25 to that of the first rotor core 22 is smaller than or equal to 50%.
Specifically, as shown in fig. 6 to 9, the present embodiment leaves a gap between the second bearing 24 and the first rotor core 22 to place the sleeve 25. By adding the sleeve 25, the rotor is fixed. The sleeve 25 is preferably a cylinder made of metal. The sleeve 25 has a smaller diameter than the first rotor core 22 to save costs.
This embodiment places the sleeve by leaving a gap between the second bearing and the first rotor core. The stability of the rotor is improved by adding the sleeve. By reducing the diameter of the sleeve, cost savings are achieved. And finally, the sleeve is made of metal so as to further improve the stability.
One of these application embodiments, an electric automobile, including permanent magnet synchronous machine, permanent magnet synchronous machine includes: stator 1 and holding are in the stator 1 with the coaxial rotor 2 of stator 1, rotor 2 include with the coaxial rotor shaft 21 of stator 1 and cover are established first rotor core 22 in the rotor shaft 21, the axial length of stator 1 is greater than the axial length of first rotor core 22.
The rotor core space is reserved in this application for after the vehicle is sold, can be through increasing rotor core in order to promote the power of motor, need not to carry out the whole change to the motor, greatly reduced the cost that promotes vehicle power.
Fig. 10 is a flowchart illustrating a method for upgrading power of a permanent magnet synchronous motor of an electric vehicle according to the present application, where the electric vehicle includes the permanent magnet synchronous motor, and the permanent magnet synchronous motor includes: stator 1 and holding in stator 1 with stator 1 coaxial rotor 2, rotor 2 include with stator 1 coaxial rotor shaft 21 and the cover establish rotor shaft 21 is last first rotor core 22, stator 1's axial length is greater than first rotor core 22's axial length, the method includes:
step S1001 of taking out a rotor 2 from a stator 1 of the permanent magnet synchronous motor of the electric vehicle;
step S1002, sleeving a second rotor core 26 on the rotor shaft 21 of the rotor 2;
step S1003, assembling the rotor 2 assembled with the second rotor iron core 26 into the stator 1, and finishing the power upgrade of the permanent magnet synchronous motor.
Specifically, when the customer needs to raise the vehicle power after the vehicle is sold, step S1001 is executed to take out the rotor 2. Then, step S1002 is executed to sleeve the second rotor core 26 on the rotor shaft 21, as shown in fig. 5. Step S1003 is performed again, and the rotor 2 is assembled into the stator 1.
The rotor core space is reserved in this application for after the vehicle is sold, can be through increasing rotor core in order to promote the power of motor, need not to carry out the whole change to the motor, greatly reduced the cost that promotes vehicle power.
The application provides a method for upgrading power of a permanent magnet synchronous motor of an electric automobile, wherein the electric automobile comprises the permanent magnet synchronous motor, and the permanent magnet synchronous motor comprises the following steps: a permanent magnet synchronous motor comprising: the stator comprises a stator 1 and a rotor 2 which is accommodated in the stator 1 and is coaxial with the stator 1, wherein the rotor 2 comprises a rotor rotating shaft 21 which is coaxial with the stator 1, a first rotor core 22 which is sleeved on the rotor rotating shaft 21, a first bearing 23 and a second bearing 24 which are sleeved on two ends of the rotor rotating shaft 21, and a sleeve 25 which is sleeved on the rotor rotating shaft 21, and the axial length of the stator 1 is greater than that of the first rotor core 22;
the first bearing 23 is disposed on a first side of the first rotor core 22 and abuts against the first rotor core 22, the second bearing 24 is disposed on a second side of the first rotor core 22, a preset gap is formed between the second bearing 24 and the second side of the first rotor core 22, and a distance between the first bearing 23 and the second bearing 24 is consistent with an axial length of the stator 1;
the sleeve 25 is disposed between the second bearing 24 and the second side of the first rotor core 22, and the sleeve 25 respectively abuts against the second bearing 24 and the second side of the first rotor core 22;
the sleeve 25 is a metal sleeve, the diameter of the sleeve 25 is smaller than that of the first rotor core 22, and the diameter ratio of the diameter of the sleeve 25 to that of the first rotor core 22 is less than or equal to 50%;
the method comprises the following steps:
taking out a rotor 2 from a stator 1 of the permanent magnet synchronous motor of the electric vehicle;
taking down the sleeve 25, and sleeving a second rotor core 26 on the rotor rotating shaft 21 of the rotor 2, wherein the first rotor core 22 comprises a silicon steel sheet and magnetic steel, and the second rotor core 26 comprises a silicon steel sheet and magnetic steel consistent with the first rotor core 22;
and assembling the rotor 2 assembled with the second rotor core 26 into the stator 1 to complete the power upgrade of the permanent magnet synchronous motor.
Specifically, when the customer needs to raise the vehicle power after the vehicle is sold, the rotor 2 is taken out first. Then, as shown in fig. 5, second rotor core 26 is fitted over rotor shaft 21. The rotor 2 is then assembled into the stator 1.
This scheme, through increasing second rotor core 26, including silicon steel sheet and magnet steel, increase the permanent magnetism flux linkage to increase permanent magnet motor's permanent magnetism moment of torsion, and then promote the power of motor. This solution, if it is reasonable to design, can basically increase the power of the motor proportionally, for example, 100mm rotor core, and if the power is 100kw, after adding 20mm second rotor core 26, it can increase the power by about 20%, that is, 120 kw.
The space of the rotor core is reserved in the motor, and after sale, the rotor core is only required to be added, so that the power of the motor is promoted at low cost. The cost of the added rotor core is generally less than 10% of the whole motor, and is greatly lower than the cost of replacing the motor.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A permanent magnet synchronous motor, comprising: the stator structure comprises a stator (1) and a rotor (2) accommodated in the stator (1) and coaxial with the stator (1), wherein the rotor (2) comprises a rotor rotating shaft (21) coaxial with the stator (1) and a first rotor iron core (22) sleeved on the rotor rotating shaft (21), and the axial length of the stator (1) is greater than that of the first rotor iron core (22);
the rotor (2) further comprises: the first bearing (23) and the second bearing (24) are sleeved at two ends of the rotor rotating shaft (21), the first bearing (23) is arranged on the first side of the first rotor core (22) and abuts against the first rotor core (22), the second bearing (24) is arranged on the second side of the first rotor core (22), and a preset gap is formed between the second bearing (24) and the second side of the first rotor core (22);
rotor (2) still establish including the cover sleeve (25) on rotor pivot (21), sleeve (25) set up second bearing (24) with between the second side of first rotor core (22), just sleeve (25) are contradicted respectively second bearing (24) with the second side of first rotor core (22).
2. A permanent magnet synchronous machine according to claim 1, characterized in that the diameter of the sleeve (25) is smaller than the diameter of the first rotor core (22).
3. A permanent magnet synchronous machine according to claim 2, characterized in that the diameter ratio of the diameter of the sleeve (25) to the diameter of the first rotor core (22) is less than or equal to 50%.
4. A permanent magnet synchronous machine according to claim 2, characterized in that the sleeve (25) is a metal sleeve.
5. A permanent magnet synchronous machine according to claim 1, characterized in that the distance between the first bearing (23) and the second bearing (24) corresponds to the axial length of the stator (1).
6. An electric vehicle, characterized by comprising a permanent magnet synchronous machine according to any one of claims 1 to 5.
7. The method for upgrading the power of the permanent magnet synchronous motor of the electric automobile according to claim 6, characterized by comprising the following steps:
taking out a rotor (2) from a stator (1) of the permanent magnet synchronous motor of the electric vehicle;
sleeving a second rotor iron core (26) on the rotor rotating shaft (21) of the rotor (2);
and assembling the rotor (2) provided with the second rotor iron core (26) into the stator (1) to finish the power upgrade of the permanent magnet synchronous motor.
8. The method for upgrading power of the PMSM of the electric vehicle according to claim 7, wherein the first rotor core (22) comprises silicon steel sheets and magnetic steel, and the second rotor core (26) comprises silicon steel sheets and magnetic steel consistent with the first rotor core (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011437729.7A CN112564445B (en) | 2020-12-07 | 2020-12-07 | Permanent magnet synchronous motor, electric automobile and power upgrading method of permanent magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011437729.7A CN112564445B (en) | 2020-12-07 | 2020-12-07 | Permanent magnet synchronous motor, electric automobile and power upgrading method of permanent magnet synchronous motor |
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| CN112564445A CN112564445A (en) | 2021-03-26 |
| CN112564445B true CN112564445B (en) | 2022-05-10 |
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| CN202011437729.7A Active CN112564445B (en) | 2020-12-07 | 2020-12-07 | Permanent magnet synchronous motor, electric automobile and power upgrading method of permanent magnet synchronous motor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6069422A (en) * | 1998-03-06 | 2000-05-30 | Fasco Industries, Inc. | Noise reduction motor design and method |
| CN103066720A (en) * | 2013-01-05 | 2013-04-24 | 西安英威腾合升动力科技有限公司 | Axial magnetic field permanent magnet motor with asymmetric magnetic circuits |
| CN103580410A (en) * | 2012-07-31 | 2014-02-12 | 成都联腾动力控制技术有限公司 | Wide-range speed control permanent magnet synchronous motor used for electric vehicle |
| CN104917346A (en) * | 2015-06-18 | 2015-09-16 | 今盛科技有限公司 | Multi-rotor permanent magnet synchronous motor |
| CN210577982U (en) * | 2019-09-20 | 2020-05-19 | 雷德伺服技术(苏州)有限公司 | Motor rotor |
| CN111509937A (en) * | 2020-04-23 | 2020-08-07 | 佛山中锦微电科技有限公司 | Coaxial line opposed rotor differential motor and new energy automobile |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006136068A (en) * | 2004-11-04 | 2006-05-25 | Mori Seiki Co Ltd | Permanent magnet type synchronous motor |
-
2020
- 2020-12-07 CN CN202011437729.7A patent/CN112564445B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6069422A (en) * | 1998-03-06 | 2000-05-30 | Fasco Industries, Inc. | Noise reduction motor design and method |
| CN103580410A (en) * | 2012-07-31 | 2014-02-12 | 成都联腾动力控制技术有限公司 | Wide-range speed control permanent magnet synchronous motor used for electric vehicle |
| CN103066720A (en) * | 2013-01-05 | 2013-04-24 | 西安英威腾合升动力科技有限公司 | Axial magnetic field permanent magnet motor with asymmetric magnetic circuits |
| CN104917346A (en) * | 2015-06-18 | 2015-09-16 | 今盛科技有限公司 | Multi-rotor permanent magnet synchronous motor |
| CN210577982U (en) * | 2019-09-20 | 2020-05-19 | 雷德伺服技术(苏州)有限公司 | Motor rotor |
| CN111509937A (en) * | 2020-04-23 | 2020-08-07 | 佛山中锦微电科技有限公司 | Coaxial line opposed rotor differential motor and new energy automobile |
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| CN112564445A (en) | 2021-03-26 |
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