CN102420481A - Permanent magnet synchronous motor and cambered rotor structure thereof - Google Patents
Permanent magnet synchronous motor and cambered rotor structure thereof Download PDFInfo
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- CN102420481A CN102420481A CN201110427613XA CN201110427613A CN102420481A CN 102420481 A CN102420481 A CN 102420481A CN 201110427613X A CN201110427613X A CN 201110427613XA CN 201110427613 A CN201110427613 A CN 201110427613A CN 102420481 A CN102420481 A CN 102420481A
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- permanent magnet
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- synchronous motor
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Abstract
The invention discloses a permanent magnet synchronous motor and a cambered rotor structure thereof. The cambered rotor structure has a rotor core of which each pole is provided with at least two permanent magnets and magnetic isolation bridges. Mounting holes in a number which corresponds to that of the permanent magnets are formed on the rotor core, and are used for arranging the permanent magnets. Reinforcing ribs are formed on the parts, between every two adjacent mounting holes, of the rotor core. The permanent magnets in each pole are arranged to form a cambered shape of which an opening faces the center of the rotor core. The reinforcing ribs are formed between the permanent magnets in each pole of the rotor structure, and bear centrifugal forces produced by the mass of the rotor core and the mass of each permanent magnet, so that the influence of the centrifugal forces on the strength of the magnetic isolation bridge is reduced; moreover, the reinforcing ribs have magnetic isolation effects.
Description
Technical field
The present invention 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 in the rotor core, places in the installing hole permanent magnet also fixing.Also be provided with in 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.
Summary of the invention
The object of the invention 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 object of the present invention provides a kind of permagnetic synchronous motor that comprises rotor structure.
For reaching first purpose of the present invention; The present invention 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 invention, 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 object of the present invention, the present invention 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 present invention carries, 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
Core of the present invention 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 present invention provides a kind of permagnetic synchronous motor that comprises rotor structure.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description 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 present invention carries; This figure only illustrates a utmost point of rotor structure, and 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 unshakable in one's determination 100 is provided with three permanent magnets 101 in extremely.
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 present invention 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 provided by the present invention and arc rotor structure thereof have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection range of claim of the present invention.
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 mechanism 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 mechanism 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 |
|---|---|---|---|
| CN201110427613XA CN102420481A (en) | 2011-12-19 | 2011-12-19 | Permanent magnet synchronous motor and cambered rotor structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110427613XA CN102420481A (en) | 2011-12-19 | 2011-12-19 | Permanent magnet synchronous motor and cambered rotor structure thereof |
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| Publication Number | Publication Date |
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| CN102420481A true CN102420481A (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110427613XA Pending CN102420481A (en) | 2011-12-19 | 2011-12-19 | Permanent magnet synchronous motor and cambered rotor structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017750A (en) * | 2017-05-08 | 2017-08-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002136008A (en) * | 2000-08-18 | 2002-05-10 | Yaskawa Electric Corp | Rotor for permanent magnet synchronous motor |
| CN101924445A (en) * | 2010-09-01 | 2010-12-22 | 哈尔滨工业大学 | Permanent magnetic synchronous motor in wide weak-magnetic speed-regulating range |
| CN102157998A (en) * | 2011-03-25 | 2011-08-17 | 上海大学 | Rotor of built-in permanent magnet motor and magnetic steel structural parameter determining method thereof |
| CN202435164U (en) * | 2011-12-19 | 2012-09-12 | 南车株洲电机有限公司 | Permanent magnet synchronous motor and arc rotor structure thereof |
-
2011
- 2011-12-19 CN CN201110427613XA patent/CN102420481A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002136008A (en) * | 2000-08-18 | 2002-05-10 | Yaskawa Electric Corp | Rotor for permanent magnet synchronous motor |
| CN101924445A (en) * | 2010-09-01 | 2010-12-22 | 哈尔滨工业大学 | Permanent magnetic synchronous motor in wide weak-magnetic speed-regulating range |
| CN102157998A (en) * | 2011-03-25 | 2011-08-17 | 上海大学 | Rotor of built-in permanent magnet motor and magnetic steel structural parameter determining method thereof |
| CN202435164U (en) * | 2011-12-19 | 2012-09-12 | 南车株洲电机有限公司 | Permanent magnet synchronous motor and arc rotor structure thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017750A (en) * | 2017-05-08 | 2017-08-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor |
| CN107017750B (en) * | 2017-05-08 | 2024-04-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor with a motor housing |
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Application publication date: 20120418 |