CN201910684U - Permanent magnet rotor of small/medium-sized generator - Google Patents
Permanent magnet rotor of small/medium-sized generator Download PDFInfo
- Publication number
- CN201910684U CN201910684U CN2011200261624U CN201120026162U CN201910684U CN 201910684 U CN201910684 U CN 201910684U CN 2011200261624 U CN2011200261624 U CN 2011200261624U CN 201120026162 U CN201120026162 U CN 201120026162U CN 201910684 U CN201910684 U CN 201910684U
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- permanent magnet
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a permanent magnet rotor of a small/medium-sized generator, which is fixedly sleeved on a rotor shaft. The peripheral surface of the permanent magnet rotor is provided with n bosses extending along the axial direction of the permanent magnet rotor; a groove for arrangement of a permanent magnet is formed between each two adjacent bosses; and in the n bosses, the peripheral width of m bosses is W1, the peripheral width of (n-m) bosses is W2, n is a natural number more than or equal to 2, m is a natural number more than or equal to 1, W1 and W2 are not equal to 0, and W1 is not equal to W2. The permanent magnet rotor is particularly suitable for the small/medium-sized generator. By adopting the permanent magnet rotor, the cogging torque of the generator, the rotating torque and the starting torque of the rotor shaft and the vibration and noise of the generator can be reduced.
Description
Technical field
The utility model relates to a kind of generator, especially a kind of p-m rotor that is used for medium and small generator.
Background technology
Wind energy is the energy of a kind of safe, cleaning, environmental protection.At present, the main mode of human use's wind-force is a wind power generation.Wind power generation plant is a kind ofly to utilize wind-force to drive generator and with the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of wind energy transformation for electric energy.Generator is the core component of wind power plant.Wind-driven generator can be divided into small-sized, medium-sized and large-scale etc. several according to generated output.Magneto-electric generator is owing to saved excitation winding, carbon brush, the slip ring structure of excitation-type generator, complete machine structure is simple, avoided excitation winding easily to burn, break, carbon brush, slip ring structure, complete machine structure is simple, avoided the excitation winding of electric excitation type generator easily to burn or fault such as broken string, carbon brush or slip ring be easy to wear, reliability greatly improves.Therefore, there are a lot of small-sized wind power generators all to adopt permanent magnet excitation in the market.Interact between permanent magnet and the grooved armature iron core during magneto no power, can produce cogging torque, cause magneto low rate start difficulty.In wind generator system, generator must overcome cogging torque when low rate start and low cruise, can normally move.The size of cogging torque is one of important performance indexes of weighing wind-driven generator performance quality.Cogging torque causes difficulty not only for the startup of wind-driven generator, has also reduced rotating speed of motor simultaneously, has reduced energy output, has influenced generating efficiency.
Application number provides a kind of p-m rotor that is used for motor for 200620065699 Chinese patent, include rotor core and armature spindle, armature spindle passes the axis hole of rotor core, and tighten together with rotor core, the rotor core outside is provided with several boss, spiral-lock is between adjacent two boss respectively for several magnetic shoes, and boss is the straight-tooth shape.This p-m rotor adopts the mode that permanent magnet is installed on the rotor body outer peripheral face evenly and at intervals to arrange permanent magnet, permanent magnet is embedded in the groove on the rotor body outer peripheral face, the magnetic pole of the adjacent end of the permanent magnet in adjacent two grooves is identical, promptly the magnetic pole of the mutually same end of two adjacent permanent magnets is identical, the circumferential thickness of the boss between all any two grooves is identical, so two adjacent permanent magnets are symmetric arrangement, this permanent magnet arrangement can cause the magnetic circuit error bigger, the electromagnetic field of generator inside distributes comparatively complicated, the generator cogging torque is bigger, the driving torque of armature spindle and starting torque are also bigger, generator has and starts and the low cruise difficulty, it is big easily to produce vibration and noise, generating efficiency is hanged down inferior problem, has restricted the development of small-sized wind power generator.
The utility model content
The utility model is the weak point that exists in the above-mentioned prior art for avoiding, a kind of p-m rotor that is used for medium and small generator is provided, to reduce the cogging torque of generator, reduce the driving torque and the starting torque of armature spindle, alleviate the vibration and the noise of generator.
The utility model be the technical solution problem by the following technical solutions.
The p-m rotor that is used for medium and small generator, its design feature be, described p-m rotor fixed cover is located on the armature spindle, and the outer peripheral face of p-m rotor is provided with n the axially extended boss along p-m rotor; Be formed with the groove that is used to place permanent magnet between two adjacent lands; In n the boss circumferential width of m boss being arranged is W1, and the circumferential width of all the other n-m boss is W2, and n 〉=2 and n are natural number, and m 〉=1 and m are natural number, and W1 and W2 all are not equal to 0 and W1 ≠ W2; In the described permanent magnet, the polarity difference of the magnetic pole of the adjacent end of two adjacent permanent magnets.
Compared with the prior art, the utility model beneficial effect is embodied in:
P-m rotor of the present utility model, because the circumferential width difference of the boss between the permanent magnet, and the pole polarity difference of the same end of adjacent permanent magnet, make the magnetic pole of permanent magnet arrange in asymmetric mode, and the teeth groove of stator is equally distributed, be not corresponding state mutually between permanent magnet and the stator teeth groove, reduced the cogging torque of generator, the driving torque and the starting torque of armature spindle have been reduced, alleviate the vibration and the noise of generator, improved the generating efficiency and the energy output of generator.
Because the driving torque and the starting torque of p-m rotor of the present utility model are lower, make the utility model be particularly useful for medium and small generator, particularly middle-size and small-size wind-driven generator.
Description of drawings
Fig. 1 is the stator of an embodiment of the present utility model and the radially sectional drawing of p-m rotor.
Fig. 2 is the radially sectional drawing of the p-m rotor of another embodiment of the present utility model.
Fig. 3 is the cutaway view that is provided with the low moment of torsion generator of p-m rotor of the present utility model.
Label in accompanying drawing 1～accompanying drawing 3: 1 front end housing, 2 stators, 21 windings, 22 teeth groove, 3 p-m rotors, 4 armature spindles, 5 bearings, 6 permanent magnets, 7 boss, 8 bearing pedestals.
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment
Referring to Fig. 1～Fig. 2, be used for the p-m rotor of medium and small generator, it is characterized in that described p-m rotor 3 fixed covers are located on the armature spindle 4, the outer peripheral face of p-m rotor 3 is provided with n the axially extended boss 7 along p-m rotor 3; The cross section of described boss 7 can be rectangle, also can be trapezoidal; When described cross section was trapezoidal, trapezoidal microcephaly's one end and the outer peripheral face of p-m rotor 3 were fixedly connected; Be formed with the groove that is used to place permanent magnet 6 between two adjacent lands 7; In n the boss 7 circumferential width of m boss 7 being arranged is W1, and the circumferential width of all the other n-m boss 7 is W2, and n 〉=2 and n are natural number, and m 〉=1 and m are natural number, and W1 and W2 all are not equal to 0 and W1 ≠ W2.In a plurality of boss, the boss of different in width can be corresponding one by one (as shown in Figure 2) that distributes, and also can only set the boss of a broad and will make the width unanimity (as shown in Figure 1) of his boss.In the described permanent magnet 6, the polarity difference of the magnetic pole of the adjacent end of two adjacent permanent magnets 6 is respectively the S utmost point and the N utmost point.Because the circumferential width difference of the boss between the part permanent magnet, and the pole polarity difference of a corresponding end end of adjacent permanent magnet, make the magnetic pole of permanent magnet arrange in asymmetric mode, also be incomplete corresponding state between permanent magnet and the stator teeth groove, the interaction force in the magnetic field between permanent magnet and the stator teeth groove has reduced, can reduce the cogging torque of generator thus, the driving torque and the starting torque of armature spindle have been reduced, alleviate the vibration and the noise of generator, improved the generating efficiency and the energy output of generator.
As Fig. 3, generator comprises stator and p-m rotor of the present utility model.Described stator 2 is a tubular, and the inner peripheral surface of stator is provided with a plurality of circumferential equally distributed teeth groove 22; Be wound with stator winding 21 on the bossing of two adjacent teeth groove.Described p-m rotor fixed cover is located on the armature spindle, and is positioned within the cavity of stator, also is incomplete corresponding state between permanent magnet and the stator teeth groove.The stator of generator is formed by stacking by silicon steel sheet, and the inboard of stator has equally distributed in order to twine the teeth groove of winding.Winding is by high temperature resistant pure copper wire coiling.The body of p-m rotor is formed by stacking by punching silicon-steel.Armature spindle is processed by stainless steel material, and front end is a projecting shaft, and the rear end does not have the bearing step.Permanent magnet adopts rare earth material to make overlay coating.Permanent magnet is embedded in the groove of rotor body outer surface, constitutes p-m rotor with body.The corresponding cooperation of p-m rotor with stator winding, the polarity difference that permanent magnet is adjacent, and and stator between leave the gap.The polarity of the same end of adjacent permanent magnet is respectively the N utmost point and the S utmost point.The armature spindle rear end of generator does not have the bearing step, and front end has bearing step and projecting shaft.The armature spindle rear end does not have the bearing step, and front end has bearing step and projecting shaft, and armature spindle is passed by rotor bore, and fixedly step location is arranged.The front end of shield axle center is provided with bearing pedestal, the rolling bearing of built-in two same models, and armature spindle is outwards passed by the end cap inboard, and the step location is arranged.Generator does not have rear end cap, and front end housing can directly dock with casing during installation.
Claims (1)
1. be used for the p-m rotor of medium and small generator, it is characterized in that, described p-m rotor (3) fixed cover is located on the armature spindle (4), and the outer peripheral face of p-m rotor (3) is provided with n the axially extended boss (7) along p-m rotor (3); Be formed with the groove that is used to place permanent magnet (6) between two adjacent lands (7); It is W1 that the circumferential width of m boss (7) is arranged in n the boss (7), and the circumferential width of all the other n-m boss (7) is W2, and n 〉=2 and n are natural number, and m 〉=1 and m are natural number, and W1 and W2 all are not equal to 0 and W1 ≠ W2; In the described permanent magnet (6), the polarity difference of the magnetic pole of the adjacent end of two adjacent permanent magnets (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200261624U CN201910684U (en) | 2011-01-26 | 2011-01-26 | Permanent magnet rotor of small/medium-sized generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200261624U CN201910684U (en) | 2011-01-26 | 2011-01-26 | Permanent magnet rotor of small/medium-sized generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201910684U true CN201910684U (en) | 2011-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200261624U Expired - Fee Related CN201910684U (en) | 2011-01-26 | 2011-01-26 | Permanent magnet rotor of small/medium-sized generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201910684U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208872A (en) * | 2012-01-16 | 2013-07-17 | 三星电子株式会社 | Rotor and motor including the same |
| CN104518586A (en) * | 2013-09-27 | 2015-04-15 | 北京明诚技术开发有限公司 | Straight slot pole staggered structure for large-scale PMSM |
| CN105576869A (en) * | 2016-02-18 | 2016-05-11 | 华南理工大学 | Surface inlaid self-starting permanent-magnet synchronous motor rotor |
| CN107370265A (en) * | 2017-07-04 | 2017-11-21 | 广东威灵电机制造有限公司 | Skewed pole rotor iron core and its core stamping, skewed pole rotor and motor |
| WO2018209738A1 (en) * | 2017-05-15 | 2018-11-22 | 华中科技大学 | Rotor, stator, and multi-working harmonic permanent magnet motor |
| CN109831085A (en) * | 2019-02-15 | 2019-05-31 | 深圳市配天电机技术有限公司 | Switched reluctance machines, electric car and electrical equipment |
| CN110192332A (en) * | 2016-12-21 | 2019-08-30 | 沃拉博股份有限公司 | Motor |
-
2011
- 2011-01-26 CN CN2011200261624U patent/CN201910684U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208872A (en) * | 2012-01-16 | 2013-07-17 | 三星电子株式会社 | Rotor and motor including the same |
| US9831729B2 (en) | 2012-01-16 | 2017-11-28 | Samsung Electronics Co., Ltd. | Electric motor's sectional rotor with asymmetric poles having permanent magnets |
| CN103208872B (en) * | 2012-01-16 | 2017-12-12 | 三星电子株式会社 | Rotor and the engine including the rotor |
| CN104518586A (en) * | 2013-09-27 | 2015-04-15 | 北京明诚技术开发有限公司 | Straight slot pole staggered structure for large-scale PMSM |
| CN104518586B (en) * | 2013-09-27 | 2018-01-09 | 北京明诚技术开发有限公司 | Suitable for the straight trough mistake pole structure of large-scale permagnetic synchronous motor |
| CN105576869A (en) * | 2016-02-18 | 2016-05-11 | 华南理工大学 | Surface inlaid self-starting permanent-magnet synchronous motor rotor |
| CN110192332A (en) * | 2016-12-21 | 2019-08-30 | 沃拉博股份有限公司 | Motor |
| US11264853B2 (en) | 2016-12-21 | 2022-03-01 | Molabo Gmbh | Electric machine having a stator with magnetic poles of various circumferential extents |
| WO2018209738A1 (en) * | 2017-05-15 | 2018-11-22 | 华中科技大学 | Rotor, stator, and multi-working harmonic permanent magnet motor |
| US11356005B2 (en) | 2017-05-15 | 2022-06-07 | Huazhong University Of Science And Technology | Rotor, stator and multi-working-harmonic permanent magnet motor |
| CN107370265A (en) * | 2017-07-04 | 2017-11-21 | 广东威灵电机制造有限公司 | Skewed pole rotor iron core and its core stamping, skewed pole rotor and motor |
| CN109831085A (en) * | 2019-02-15 | 2019-05-31 | 深圳市配天电机技术有限公司 | Switched reluctance machines, electric car and electrical equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20130126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |