CN103078430A - Permanent magnet motor with circular and uniform distribution of rotor permanent magnets - Google Patents
Permanent magnet motor with circular and uniform distribution of rotor permanent magnets Download PDFInfo
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- CN103078430A CN103078430A CN2012105864788A CN201210586478A CN103078430A CN 103078430 A CN103078430 A CN 103078430A CN 2012105864788 A CN2012105864788 A CN 2012105864788A CN 201210586478 A CN201210586478 A CN 201210586478A CN 103078430 A CN103078430 A CN 103078430A
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Abstract
The invention discloses a permanent magnet motor with circular and uniform distribution of rotor permanent magnets, and belongs to the field of motors. The permanent magnet motor comprises a permanent magnet rotor, a stator, a bearing and a casing, wherein the permanent magnet rotor comprises permanent magnets, a shaft and mandrels, the mandrels are fixedly arranged at the two ends of the shaft, the inner side of the cylindrical surface of the shaft is annularly and uniformly provided with grooves in the circumferential direction, the grooves are arranged in an independent and non-connected way, and the permanent magnets are arranged in the grooves to form a rotor main body of the permanent magnet motor. The permanent magnet motor has the advantages that the material utilization rate and the strength of the rotor of the permanent magnet motor are improved, the higher rotation speed and higher stress can be borne, the eddy current loss is smaller, the structure is simple, the cost is low, the output efficiency is high, the application range is wide, the requirements of different users can be met, and the permanent magnet motor can be used for high-speed motors.
Description
Technical field
The present invention relates to a kind of rotor permanent magnet and circularize uniform magneto, belong to technical field of motors.
Background technology
One, rotor uses the origin of permanent magnet
The advantage of permanent-magnet rotor motor: 1, the high permanent-magnetic electric machine of simple in structure, reliability has saved excitation winding, carbon brush, the slip ring structure of exciter engine, makes complete machine structure simple; Cancelled carbon brush, slip ring structure, avoided magnetic-type generator excitation winding easily to burn, break, the fault such as carbon brush, slip ring are easy to wear; Reliability is greatly improved.
2, volume is little, lightweight, specific power is large
The employing of permanent magnet rotor structure, so that the internal structure of motor design is arranged very compactly, volume, weight greatly reduce.The simplification of permanent magnet rotor structure, also so that rotor moment of inertia reduces, practical rotating speed increases, and specific power (being the ratio of power, volume) reaches a very high value.
3, in, low-speed performance is good
In the identical situation of power grade, during idling, permanent-magnetic electric machine doubles than the power output of exciter engine.
4, efficient is high
Permanent-magnetic electric machine is a kind of energy-conserving product.Permanent magnet rotor structure has been removed from and has been produced the mechanical loss that rubs between the required exciting power in rotor field and carbon brush, the slip ring, so that permanent-magnetic electric machine efficient greatly improves.Average efficiency only has 45% to 55% in the range of speeds of common exciter engine between 1500 rev/mins to 6000 rev/mins, and permanent-magnetic electric machine then can be up to 75% to 80%.
5, without radio interference
Magneto is non-carbonate, without the structure of slip ring, eliminated the radio interference that the friction of carbon brush and slip ring produces; Eliminate electric spark, be particularly suitable for working under the more environment of explosion risk, also reduced the requirement of motor to ambient temperature.
Two, motor permanent magnetic rotor traditional structure mode
The tradition permanent magnet rotor structure is that cylindricality, annular permanent magnet are wrapped in the sheath, or magnet steel is embedded in the mandrel surface.
The cylindricality permanent magnet is wrapped in the sheath, is the most traditional structure, and it is applicable to micro-machine, large to the waste of heavy-duty motor permanent magnet, causes cost too high, also has sleeve thick, unfavorable to the electromagnetic structure design.
Annular permanent magnet is wrapped in the sheath, is the improvement to the front, and cost decreases, but other problem not solve, more than there emerged a the problem that inner radius stress is concentrated, break easily during High Rotation Speed, this makes it limit rotor speed, is difficult to be used on the high-speed electric expreess locomotive.For addressing this problem, generally can in the middle of magnet ring, put into silicon steel sheet or bar magnet, this has strengthened the rotor manufacture difficulty, affects dynamic balancing.Although permanent magnet can not come off, do not solve the problem that inner radius stress is concentrated, permanent magnet is ftractureed easily, magnetic property there are some impacts.In addition, use the permanent magnet of monoblock also can increase trochiterian eddy current loss, increased the difficulty of motor radiating.
Magnet steel is embedded in the mandrel surface, although solved the Electromagnetic Design problem, intensity is low; The magnet steel eddy current loss that is directly exposed in the armature reacting field is also larger, therefore is difficult to be used on the high-speed electric expreess locomotive.
Summary of the invention
The invention provides a kind of rotor permanent magnet and circularize uniform magneto, simple in structure, with low cost, delivery efficiency is high, applied range, can be used on the high-speed electric expreess locomotive.
The present invention adopts following technical scheme for solving its technical problem:
A kind of rotor permanent magnet circularizes uniform magneto, comprise p-m rotor, stator, bearing and casing, p-m rotor wherein, stator and bearing are contained in the casing, p-m rotor is fixed on the bearing and rotates, p-m rotor comprises permanent magnet, axle and two ends mandrel, described axle circularizes the uniform groove that is arranged with in its cylinder inboard along circumference, each groove is independently disjunct mutually, permanent magnet is placed on and consists of the permanent magnet machine rotor main body in the groove, the two ends mandrel is fixed on the axle two ends, be used for promoting workpiece rotation or rotor driven and rotate, output mechanical energy or input mechanical energy consist of p-m rotor.
Described permanent magnet radially distributes, and every permanent magnet does not link to each other, and all permanent magnets are externally looked as a whole, and integral body magnetizes or with each permanent magnet p-m rotor of packing into afterwards that radially magnetizes first.
Described p-m rotor is n electrode structure pattern, and n is even number.
Described permanent magnet is divided into m segment structure pattern vertically according to the segmentation of length needs, and m is the natural number greater than 1.
Beneficial effect of the present invention is as follows:
1, compares magnet ring, the problem that does not exist inner radius stress to concentrate.Fast state lower rotor part centrifugal force is very large, and larger plastic deformation can appear in rotor simultaneously; For the cylinder or round ring magnet of integral body, the single volume I of each strip permanent magnet is born higher centrifugal force, and can not occur cracked; Relatively whole permanent magnet, stress comparatively disperses, and the stress that each permanent magnet bears reduces, and rotor can bear larger rotor deformation.
2, outer wall thickness reduces, and the circumferential segmentation of permanent magnet, and further vertically segmentation are conducive to reduce rotor loss.
3, rotor body shaft is that cylinder material by monoblock consists of, and has improved stock utilization and rotor strength, can bear higher rotating speed and stress, and have less eddy current loss.Conventional rotors is stressed or concentrate on the sheath, or concentrates on the axle, and other parts do not stress; The structure of this device makes all-in-one-piece sheath, axle, muscle all stressed, and it is high a lot of that effective rate of utilization is wanted.
4, reduce the permanent magnet consumption, reduce cost.
5, rotor permanent magnet radial distribution, all permanent magnets of p-m rotor are externally visual as a whole, can integral body magnetize; But also each permanent magnet rotor of packing into afterwards that radially magnetizes first.
Description of drawings
Fig. 1 is the permanent magnet rotor plane schematic diagram of packing into afterwards that radially magnetizes first.
Fig. 2 is that all permanent magnets of p-m rotor are externally visual as a whole, can integral body magnetize the integral body floor map under the state that magnetizes.
Fig. 3 is the unistage type permanent magnet rotor structure schematic diagram of radially packing into, and wherein 1 is the first axle; The 2nd, the first permanent magnet.
Fig. 4 is the segment permanent magnet body rotor structure schematic diagram of radially packing into, and wherein 3 is second axles; The 4th, the second permanent magnet.
Fig. 5 is the permanent magnet motor structure schematic diagram, and wherein 5 is casings; The 6th, stator; The 7th, bearing; 8 is first mandrels; The 9th, the third permanent magnet; 10 is the 3rd axles; 11 is second mandrels.
Embodiment
Below in conjunction with accompanying drawing the invention is described in further details.
As shown in Figure 1, the permanent magnet magnetic of can radially substituting the bad for the good first, in the axle of then packing into, its external magnetic characteristic is such as figure, and polarity can integral body be exchanged the same.
As shown in Figure 2, permanent magnet can radially be packed into first in the axle, and axle is that the cylinder material by monoblock consists of, and all permanent magnets of its p-m rotor are externally visual as a whole, and it can integral body magnetize, and its external magnetic characteristic is such as figure.
As shown in Figure 3, unistage type permanent magnet (the first permanent magnet 2) is radially packed in axle (the first axle 1) groove one by one, and its structural representation is fit to the short structure of permanent magnet overall length such as figure.Then available chock or curing filler adding slit are fixed.
As shown in Figure 4, when permanent magnet is longer, from the end difficulty of packing into, can divide two sections or multistage to pack into from two ends, be in a minute two-part permanent magnet (the second permanent magnet 4) is radially packed axle (the second axle 3) groove into from two ends among the figure, its structural representation is fit to the long structure of permanent magnet overall length such as figure.Then available chock or curing filler adding slit are fixed.
As shown in Figure 5, this is the permanent magnet motor structure schematic diagram, comprise permanent magnetism, stator, bearing and casing, the stator of magneto and other permanent magnet motor stators are as broad as long, p-m rotor wherein, stator and bearing are contained in the casing, p-m rotor is fixed on the bearing and rotates, p-m rotor comprises permanent magnet, axle and two ends mandrel, described axle is that the cylinder material by monoblock consists of, circularize the uniform groove that is arranged with in its cylinder inboard along circumference, each groove is independently disjunct mutually, permanent magnet is placed on and consists of the permanent magnet machine rotor main body in the groove, and the two ends mandrel is fixed on the axle two ends, is used for promoting workpiece rotation or rotor driven and rotates, output mechanical energy or input mechanical energy consist of p-m rotor.After packing into the third permanent magnet 9 in the groove of the 3rd axle 10, be connected and fixed the two ends mandrel, namely the first mandrel 8 and the second mandrel 11 just obtain needed rotor, after this rotor packed into just obtain magneto in the casing 5 that stator 6, bearing 7 are housed.
Claims (4)
1. a rotor permanent magnet circularizes uniform magneto, comprise p-m rotor, stator, bearing and casing, p-m rotor wherein, stator and bearing are contained in the casing, p-m rotor is fixed on the bearing and rotates, it is characterized in that p-m rotor comprises permanent magnet, axle and two ends mandrel, described axle circularizes the uniform groove that is arranged with in its cylinder inboard along circumference, each groove is independently disjunct mutually, permanent magnet is placed on and consists of the permanent magnet machine rotor main body in the groove, the two ends mandrel is fixed on the axle two ends, be used for promoting workpiece rotation or rotor driven and rotate, output mechanical energy or input mechanical energy consist of p-m rotor.
2. a kind of rotor permanent magnet according to claim 1 circularizes uniform magneto, it is characterized in that described permanent magnet radially distributes, every permanent magnet does not link to each other, all permanent magnets are externally looked as a whole, and integral body magnetizes or with each permanent magnet p-m rotor of packing into afterwards that radially magnetizes first.
3. a kind of rotor permanent magnet according to claim 1 circularizes uniform magneto, it is characterized in that described p-m rotor is n electrode structure pattern, and n is even number.
4. a kind of rotor permanent magnet according to claim 1 circularizes uniform magneto, it is characterized in that described permanent magnet according to the segmentation of length needs, is divided into m segment structure pattern vertically, and m is the natural number greater than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105864788A CN103078430A (en) | 2012-12-31 | 2012-12-31 | Permanent magnet motor with circular and uniform distribution of rotor permanent magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105864788A CN103078430A (en) | 2012-12-31 | 2012-12-31 | Permanent magnet motor with circular and uniform distribution of rotor permanent magnets |
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| Publication Number | Publication Date |
|---|---|
| CN103078430A true CN103078430A (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105864788A Pending CN103078430A (en) | 2012-12-31 | 2012-12-31 | Permanent magnet motor with circular and uniform distribution of rotor permanent magnets |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953740A (en) * | 2014-03-27 | 2015-09-30 | 三菱电机株式会社 | Rotor shaft and manufacturing method thereof, and electrical scanner using rotor shaft |
| CN111524681A (en) * | 2020-03-29 | 2020-08-11 | 至玥腾风科技集团有限公司 | Magnetizing method of permanent magnet and manufacturing method of high-speed rotor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005318756A (en) * | 2004-04-30 | 2005-11-10 | Fuji Electric Systems Co Ltd | Rotor of permanent magnet embedded type synchronous motor |
| CN201584831U (en) * | 2009-11-26 | 2010-09-15 | 杭州大路实业有限公司 | Two-pole permanent magnet synchronous motor rotor |
| CN202034877U (en) * | 2011-05-13 | 2011-11-09 | 沈阳工程学院 | Built-in permanent-magnetic rotor high-speed motor |
| CN202550733U (en) * | 2012-03-20 | 2012-11-21 | 中科盛创（青岛）电气有限公司 | Two-end inserted permanent magnet motor rotor |
-
2012
- 2012-12-31 CN CN2012105864788A patent/CN103078430A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005318756A (en) * | 2004-04-30 | 2005-11-10 | Fuji Electric Systems Co Ltd | Rotor of permanent magnet embedded type synchronous motor |
| CN201584831U (en) * | 2009-11-26 | 2010-09-15 | 杭州大路实业有限公司 | Two-pole permanent magnet synchronous motor rotor |
| CN202034877U (en) * | 2011-05-13 | 2011-11-09 | 沈阳工程学院 | Built-in permanent-magnetic rotor high-speed motor |
| CN202550733U (en) * | 2012-03-20 | 2012-11-21 | 中科盛创（青岛）电气有限公司 | Two-end inserted permanent magnet motor rotor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953740A (en) * | 2014-03-27 | 2015-09-30 | 三菱电机株式会社 | Rotor shaft and manufacturing method thereof, and electrical scanner using rotor shaft |
| CN104953740B (en) * | 2014-03-27 | 2018-09-21 | 三菱电机株式会社 | Armature spindle and its manufacturing method, the electrical scanner using the armature spindle |
| CN111524681A (en) * | 2020-03-29 | 2020-08-11 | 至玥腾风科技集团有限公司 | Magnetizing method of permanent magnet and manufacturing method of high-speed rotor |
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Application publication date: 20130501 |