CN202435164U - Permanent magnet synchronous motor and arc rotor structure thereof - Google Patents
Permanent magnet synchronous motor and arc rotor structure thereof Download PDFInfo
- Publication number
- CN202435164U CN202435164U CN2011205345240U CN201120534524U CN202435164U CN 202435164 U CN202435164 U CN 202435164U CN 2011205345240 U CN2011205345240 U CN 2011205345240U CN 201120534524 U CN201120534524 U CN 201120534524U CN 202435164 U CN202435164 U CN 202435164U
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- Prior art keywords
- permanent magnet
- rotor core
- arc
- synchronous motor
- rotor
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Abstract
The utility model discloses a permanent magnet synchronous motor and an arc rotor structure of the permanent magnet synchronous motor. The arc rotor structure disclosed by the utility model is provided with a rotor core; each pole of the rotor core is provided with permanent magnets and magnet isolating bridges; at least two permanent magnets are arranged in each pole; installing holes which are as many as the permanent magnets so as to be used for installing the permanent magnets are arranged on the rotor core; a reinforced rib is formed at the part of rotor core between the installing holes; the permanent magnets in each pole are in arc shaped arrangement; and the arc opening faces towards the center of the rotor core. According to the rotor structure, with the reinforced rib arranged between the permanent magnets of each pole, the centrifugal force generated by the mass of the rotor core and the mass of the permanent magnets is borne by the reinforced rib, so that the influence of the centrifugal force on the strength of a magnet isolating bridge is reduced; and meanwhile the reinforced rib has an effect of magnet isolation.
Description
Technical field
The utility model relates to technical field of motors, particularly a kind of permagnetic synchronous motor and arc rotor structure thereof.
Background technology
Along with permagnetic synchronous motor exploitation and control technology are ripe gradually, and the continuous development of permanent magnet aspect performance and industrialization, every field is to the employing permagnetic synchronous motor, and particularly the interest of permanent-magnet synchronous frequency control motor and demand are increasing.At present, permagnetic synchronous motor is widely used in various servomotors, wind power generation field and petroleum drilling and mining and driving motor for electric automobile etc.
Permagnetic synchronous motor comprises stator structure, rotor structure and rotating shaft, and rotating shaft drives rotor structure and rotates.Each utmost point of rotor core is equipped with permanent magnet, and permanent magnet can be built in the rotor core, promptly processes the installing hole that extends vertically on the rotor core, places in the installing hole permanent magnet also fixing.Also be provided with on the rotor core at a distance from magnetic bridge, be positioned at the permanent magnet two ends.
Yet; There is following technical problem in existing rotor structure: the caused centrifugal force of quality of permanent magnet quality and rotor core itself all can act at a distance from magnetic bridge; Need bear bigger pressure at a distance from magnetic bridge, influence intensity, and then can't satisfy the electromagnetic performance requirement of motor at a distance from magnetic bridge; And also there are problems such as manufacturability is poor, the permanent magnet installation effectiveness is also lower in the rotor structure of traditional structure.Especially it is bigger to work as power of motor; More than 100kW; And rotating speed is also higher, like the permagnetic synchronous motor application more than the 1000r/min, directly drives the field like the central air-conditioning compressor permanent magnet; The centrifugal force of permanent magnet and rotor core is more obvious to the influence at a distance from magnetic bridge, adopts traditional rotor magnetic circuit structural more to be difficult to meet the demands.
Therefore, how reducing the influence of centrifugal force to causing at a distance from magnetic bridge in the permanent-magnetic synchronous motor rotor structure, improve intensity, is those skilled in the art's technical issues that need to address.
The utility model content
The purpose of the utility model is the arc rotor structure that a kind of permagnetic synchronous motor is provided, and the opening of arc can reduce rotor core centrifugal force to the influence at a distance from magnetic bridge towards the rotor core center; And the number of each extremely middle permanent magnet of this rotor structure is at least two, has reinforcement between each permanent magnet, and then the centrifugal force of rotor core and permanent magnet is minimized the influence at a distance from magnetic bridge.Another purpose of the utility model provides a kind of permagnetic synchronous motor that comprises rotor structure.
For reaching first purpose of the utility model; The utility model provides a kind of arc rotor structure of permagnetic synchronous motor; Have rotor core, each utmost point of said rotor core is equipped with permanent magnet and at a distance from magnetic bridge, the number of permanent magnet described in each utmost point is at least two; Said rotor core is provided with corresponding to said permanent magnet number to be used to install the installing hole of said permanent magnet, and the rotor core between each said installing hole partly forms reinforcement; The curved layout of said permanent magnet that each is extremely interior, and arc opening is towards the center of rotor core.
Preferably, permanent magnet described in each utmost point is symmetrically distributed along the radial centre lines of the rotor core end face of correspondences at different levels.
Preferably, the number of permanent magnet described in each utmost point is three.
Preferably, the size of the said permanent magnet at each extremely middle two ends is less than the size of said installing hole, to form the separated magnetic space at two ends.
Preferably, the number of poles of said rotor core is four utmost points, sextupole or the ends of the earth.
Curved distribution of permanent magnet and opening are towards the center of rotor core in this utility model, and then the centrifugal force of the rotor core generation of arc inside is minimized the influence that produces at a distance from magnetic bridge; In addition; Each utmost point of arc rotor structure is provided with at least two permanent magnets; And has reinforcement between the permanent magnet; When then rotating with rotating shaft, the centrifugal force that the quality of arc-shaped permanent magnet scope internal rotor iron core, the quality of permanent magnet produce will be born by reinforcement, reduce centrifugal force to the influence at a distance from magnetic bridge intensity; And reinforcement has separated magnetic effect.When carrying out the concrete design of rotor structure; Carrying out stress analysis calculates; Guaranteeing each reinforcement and under the situation that the suffered stress value of magnetic bridge meets the demands, obtaining the size of best reinforcement and separated magnetic bridge that the electromagnetic performance of feasible intensity at a distance from magnetic bridge, motor is best; And leave certain margin of safety, guarantee the motor reliability of operation.
For reaching another purpose of the utility model, the utility model also provides a kind of permagnetic synchronous motor, comprises stator structure, rotor structure, and rotating shaft, and said rotor structure is above-mentioned each described arc rotor structure.Because above-mentioned arc rotor structure has above-mentioned technique effect, the permagnetic synchronous motor with this arc rotor structure also has identical technique effect.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of arc rotor structure of permagnetic synchronous motor that the utility model is carried, and this figure only illustrates a utmost point of rotor structure.
Among the figure, rotating shaft 200, rotor core 100, permanent magnet 101, separated magnetic bridge 102, reinforcement 103, installing hole 104.
Embodiment
The core of the utility model is the arc rotor structure that a kind of permagnetic synchronous motor is provided; The number of each extremely middle permanent magnet of this rotor structure is at least two; And have reinforcement between each permanent magnet, then the centrifugal force of rotor core and permanent magnet is minimized the influence at a distance from magnetic bridge.Another core of the utility model provides a kind of permagnetic synchronous motor that comprises rotor structure.
In order to make those skilled in the art understand the technical scheme of the utility model better, the utility model is done further to specify below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 1; Fig. 1 is the structural representation of a kind of embodiment of arc rotor structure of permagnetic synchronous motor that the utility model is carried; This figure only illustrates a utmost point of rotor structure; Following proposal does not receive the restriction of rotor number of poles, goes for the rotor structure of motors such as four utmost points, sextupole, the ends of the earth.
The rotor structure of permagnetic synchronous motor among this embodiment has rotor core 100, and rotor core 100 runs through the rotating shaft 200 of motor, and rotating shaft 200 drives the stator rotation of rotor core 100 with respect to motor.Each utmost point of rotor core 100 is equipped with permanent magnet 101 and separated magnetic bridge 102.Rotor core 100 each extremely in the number of permanent magnets 101 be at least two, one of Fig. 1 rotor iron core 100 is provided with three permanent magnets 101 in extremely.
Rotor core 100 is provided with the installing hole 104 corresponding with permanent magnet 101 numbers, and installing hole 104 extends axially along rotor core 100, and rotor core 100 parts between each installing hole 104 form reinforcement 103, and are as shown in Figure 1, each installing hole 104 independent setting.And each extremely interior permanent magnet 101 curved layout, and arc opening is towards the center of rotor core 100.Permanent magnet 101 is symmetrically distributed along the radial centre lines of these utmost point rotor core 100 end faces among Fig. 1, and then more to help the magnet of every pair of utmost point corresponding for this structure, makes that DISTRIBUTION OF MAGNETIC FIELD is more even in the whole rotor.To this arc-shaped permanent magnet arrangement, three permanent magnets 101 are set are convenient to form arc, and satisfy the magnetic field intensity demand.
The size of the permanent magnet 101 at each extremely middle two ends is less than the size of installing hole 104, and is to form the separated magnetic space at two ends, as shown in Figure 1.Can further strengthen at a distance from the magnetic effect at a distance from the magnetic space, with separated magnetic bridge 102 common realizations at a distance from the magnetic function.When being provided with, can on the hole wall of installing hole 104, process breach or wedge groove inner structure, so that fixed permanent magnet 101 at a distance from the magnetic space.
When rotor structure rotates with rotating shaft; The quality of the rotor core 100 in arc-shaped permanent magnet 101 scopes own, the quality of permanent magnet 101 will produce centrifugal force; Owing to have reinforcement 103 between each utmost point permanent magnet 101 in the foregoing description; The centrifugal force that then produces will be born by the reinforcement between the permanent magnet 101 103, reduce centrifugal force to the influence at a distance from magnetic bridge 102 intensity; And reinforcement 103 has separated magnetic effect.In addition, because permanent magnet 101 curved distributions, and arc opening then to produce the rotor core 100 parts minimizing of centrifugal action at a distance from magnetic bridge 102, has also reduced centrifugal force to the influence at a distance from magnetic bridge 102 towards the center of rotor core 100.
When carrying out the concrete design of rotor structure; Under the prerequisite that satisfies motor electromagnetic performance and rotor manufacture process requirement;, under the maximum speed of operation, can carry out stress analysis to permanent magnet 101, rotor core 100 action of centrifugal force and calculate according to motor, guarantee under the situation that each reinforcement 103 and separated magnetic bridge 101 suffered stress values meet the demands; Obtain the size of best reinforcement 103 and separated magnetic bridge 102; So that at a distance from the intensity of magnetic bridge 103, electromagnetic performance the best of motor, and leave certain margin of safety, guarantee the motor reliability of operation.
In addition; Because the number of each extremely interior permanent magnet 101 is more; The size of each permanent magnet 101 is less relatively, and permanent magnet 101 is mounted to 100 last times of rotor core, only needs according to permanent magnet 101 in each N of motor, the S prescribed direction under extremely; The guided tooling that utilizes non-magnet material to process pushes permanent magnet 101, and use device axial restraint permanent magnet 101 gets final product after the installation.Whole magnet steel installation process good manufacturability, production efficiency is high.
Except above-mentioned rotor structure, the utility model also provides a kind of permagnetic synchronous motor, comprises stator structure, arc rotor structure, and rotating shaft 200, and the arc rotor structure is the described arc rotor structure of above-mentioned arbitrary embodiment.Because above-mentioned arc rotor structure has above-mentioned technique effect, the permagnetic synchronous motor with this arc rotor structure also has identical technique effect.
More than a kind of permagnetic synchronous motor and arc rotor structure thereof that the utility model provided have been carried out detailed introduction.Used concrete example among this paper the principle and the execution mode of the utility model are set forth, the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the utility model.Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection range of the utility model claim.
Claims (6)
1. the arc rotor structure of a permagnetic synchronous motor; Has rotor core; Each utmost point of said rotor core is equipped with permanent magnet and at a distance from magnetic bridge, it is characterized in that the number of permanent magnet described in each utmost point is at least two; Said rotor core is provided with corresponding to said permanent magnet number to be used to install the installing hole of said permanent magnet, and the rotor core between each said installing hole partly forms reinforcement; The curved layout of said permanent magnet that each is extremely interior, and arc opening is towards the center of rotor core.
2. the arc rotor structure of permagnetic synchronous motor according to claim 1 is characterized in that, permanent magnet described in each utmost point is symmetrically distributed along the radial centre lines of the rotor core end face of correspondences at different levels.
3. the arc rotor structure of permagnetic synchronous motor according to claim 2 is characterized in that, the number of permanent magnet described in each utmost point is three.
4. according to the arc rotor structure of each described permagnetic synchronous motor of claim 1 to 3, it is characterized in that the size of the said permanent magnet at each extremely middle two ends is less than the size of said installing hole, to form the separated magnetic space at two ends.
5. the arc rotor structure of permagnetic synchronous motor according to claim 4 is characterized in that, the number of poles of said rotor core is four utmost points, sextupole or the ends of the earth.
6. a permagnetic synchronous motor comprises stator structure, rotor structure, and rotating shaft, it is characterized in that, said rotor structure is each described arc rotor structure of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205345240U CN202435164U (en) | 2011-12-19 | 2011-12-19 | Permanent magnet synchronous motor and arc rotor structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205345240U CN202435164U (en) | 2011-12-19 | 2011-12-19 | Permanent magnet synchronous motor and arc rotor structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202435164U true CN202435164U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205345240U Expired - Lifetime CN202435164U (en) | 2011-12-19 | 2011-12-19 | Permanent magnet synchronous motor and arc rotor structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202435164U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420481A (en) * | 2011-12-19 | 2012-04-18 | 南车株洲电机有限公司 | Permanent magnet synchronous motor and cambered rotor structure thereof |
| CN107565726A (en) * | 2017-10-31 | 2018-01-09 | 电子科技大学中山学院 | Permanent magnet synchronous motor rotor structure for electric automobile |
| CN112953055A (en) * | 2021-01-25 | 2021-06-11 | 中国第一汽车股份有限公司 | Rotor structure, motor and vehicle |
-
2011
- 2011-12-19 CN CN2011205345240U patent/CN202435164U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420481A (en) * | 2011-12-19 | 2012-04-18 | 南车株洲电机有限公司 | Permanent magnet synchronous motor and cambered rotor structure thereof |
| CN107565726A (en) * | 2017-10-31 | 2018-01-09 | 电子科技大学中山学院 | Permanent magnet synchronous motor rotor structure for electric automobile |
| CN107565726B (en) * | 2017-10-31 | 2024-01-23 | 重庆合众电气工业有限公司 | Permanent magnet synchronous motor rotor structure for electric automobile |
| CN112953055A (en) * | 2021-01-25 | 2021-06-11 | 中国第一汽车股份有限公司 | Rotor structure, motor and vehicle |
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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: 20120912 |
|
| CX01 | Expiry of patent term |