CN101340115B - Motor - Google Patents
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- CN101340115B CN101340115B CN2008101279083A CN200810127908A CN101340115B CN 101340115 B CN101340115 B CN 101340115B CN 2008101279083 A CN2008101279083 A CN 2008101279083A CN 200810127908 A CN200810127908 A CN 200810127908A CN 101340115 B CN101340115 B CN 101340115B
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- 239000011241 protective layer Substances 0.000 claims description 54
- 239000011347 resin Substances 0.000 claims description 36
- 229920005989 resin Polymers 0.000 claims description 36
- 230000002093 peripheral effect Effects 0.000 claims description 32
- 238000004519 manufacturing process Methods 0.000 abstract description 25
- 230000006698 induction Effects 0.000 abstract description 17
- 238000004804 winding Methods 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 36
- 229920000049 Carbon (fiber) Polymers 0.000 description 27
- 239000004917 carbon fiber Substances 0.000 description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 27
- 230000001681 protective effect Effects 0.000 description 27
- 229920001187 thermosetting polymer Polymers 0.000 description 25
- 239000010410 layer Substances 0.000 description 20
- 239000000835 fiber Substances 0.000 description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 230000007423 decrease Effects 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 150000001721 carbon Chemical class 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000009954 braiding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000005007 epoxy-phenolic resin Substances 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 208000031872 Body Remains Diseases 0.000 description 1
- 241000004297 Draba Species 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a motor, rotor, manufacturing method of the rotor and a motor provided with the rotor. In the motor of the invention, the suitable induction voltage waveform is obtained even using concentrated winding stator and bipolar rotor. In the motor (1), the stator (2) is a concentrated winding with coils wound on a plurality of salient poles (21); the rotor (3) is in bipolar structure. In the rotor (3), the permanent magnet (33) uses two arc separated permanent magnets (331, 332); on the permanent magnet (33), two magnetic poles are formed in an angular range of from 135 degrees to 180 degrees, preferable 150 degrees to 180 degrees in the same angular range. So, the peak voltage of the induction voltage waveform is reduced to below 15%m and even below 10%.
Description
Technical field
The present invention relates to a kind of comprise rotor with permanent magnet and with respect to this rotor produce the stator of rotating magnetic field brushless motor, have the inner rotor type motor of permanent magnet, the manufacturing approach of this rotor and motor at the outer circumferential side of armature spindle with this rotor.
Background technology
Brushless motor comprises: separate the space and the rotor of permanent magnet opposed at outstanding towards the radial direction a plurality of prominent front end that is wound with the stator of coil on extremely and has with the prominent utmost point; Waveform to the induced voltage that produces in the coil detects; And control energising, thereby produce best rotating magnetic field with respect to rotor to coil based on the waveform of this induced voltage.Therefore, if the waveform and the crest voltage value of induced voltage are improper, then can't be rotated control well.
Therefore, proposed in the past: use will winding in advance coil be installed on the utmost point tooth the coiled stator of distribution and through adjusting waveform that this coiling form makes induced voltage near sinusoidal wave structure and use coil directly is wound on a plurality of concentrated coiled stators of extremely going up and the number of poles of permanent magnet increased to (with reference to the patent documentations 1) such as structures of 16 utmost points of dashing forward respectively.
Inner rotor type motor generally comprises: the stator that has the rotor of permanent magnet and produce rotating magnetic field with respect to this rotor at the outer circumferential side of armature spindle.In this motor, because the rotor high-speed rotation, the permanent magnet that therefore is configured in the armature spindle periphery is sometimes because of receiving the centrifugal force breakage and dispersing.For fear of this situation, as shown in Figure 9, the someone has proposed the protective cover that obtains after the hot curing of carbon prepreg 1003 cover if be pressed into the structure (with reference to patent documentation 2) on the periphery of the annular permanent-magnet body 1002 that armature spindle 1001 peripheries are provided with.
Patent documentation 1: Japanese Patent Laid is opened the 2006-187189 communique
Patent documentation 2: japanese patent laid-open 8-107641 communique
Yet; In patent documentation 1 disclosed motor; When adopting in order to improve motor characteristics when concentrating winding method; Use the dividing permanent-magnet body for the simplification that realizes motor structure and the simplification of manufacturing process etc., as permanent magnet and reduce number of poles,, then have the problem that can't obtain suitable induction voltage waveform in the past if rotor is made bipolar configurations in order to reduce loss.
In the rotor 1000 that patent documentation 2 is put down in writing, must carry out following operation, i.e. first coiling carbon prepreg and make its hot curing on columned model assembly (dummy member) waits; Thereby form cylindrical protective cover 1003; Afterwards, this protective cover 1003 is pulled down from model assembly, then; Sheathed on the outer peripheral face of permanent magnet 1002, be pressed into protective cover 1003, therefore have the inefficient problem of making.In addition; On the rotor 1001 that patent documentation 2 is put down in writing; For permanent magnet 1002 and protective cover 1003 are close to, need be with the fine finishining of protective cover 1003 from the internal diameter precision that is used to improve protective cover 1003 after model assembly is pulled down, this operation also can make the manufacturing decrease in efficiency.
Summary of the invention
In view of the above problems, the 1st technical problem of the present invention is to provide a kind of motor that when using concentrated takeup type stator and bipolar rotor, also can obtain suitable induction voltage waveform.
The 2nd technical problem of the present invention is to provide a kind of can prevent rotor, the manufacturing approach of this rotor and the motor with this rotor that permanent magnet disperses under the situation that does not cause the manufacturing decrease in efficiency.
In order to solve above-mentioned the 1st technical problem; Motor of the present invention; Comprise: a plurality of prominently be wound with the stator of coil on extremely and have that front end with the said prominent utmost point separates the space and the rotor of permanent magnet opposed is characterized in that outstanding towards radial direction, said stator is that said coil is wound on said a plurality of prominent concentrated coiled stator of extremely going up respectively; Said permanent magnet is a dipolar configuration; The S utmost point and the N utmost point respectively have one, and said two magnetic poles are respectively formed in 135 ° to 180 ° the angular range, and are formed on each other in the angle same scope.
In the present invention, what use as stator is that coil is wound on a plurality of prominent concentrated coiled stators of extremely going up respectively, therefore, can reduce resistance through the shortening coil end, and can improve motor characteristics.If concentrate coiled stator, then the wiring processing is also easy.In the present invention, rotor is a bipolar configurations, but two magnetic poles of permanent magnet are respectively formed in 135 ° to 180 ° the angular range and are formed on each other in the angle same scope, and week does not upwards form the regional little of magnetic pole.Therefore, can the decline of the crest voltage of induction voltage waveform be suppressed in 15% the allowed band, if this decline then can be used as sinusoidal wave the processing.Therefore,, also can carry out the Spin Control of motor reliably, can reduce torque ripple and iron loss even use when concentrating coiled stator and rotor as dipolar configuration.
It is the motor with 6 electrode structures of 6 said prominent utmost points that the present invention can be applicable to said stator.If constitute like this, then can reduce iron loss, and can avoid the problem that torque reduces, cogging torque increases, the utilization ratio of permanent magnet magnetic flux descends.That is, during greater than 6 utmost points, iron loss increases at number of poles, and during less than 6 utmost points, the problem that torque reduces, cogging torque increases, the utilization ratio of permanent magnet magnetic flux descends then can take place, if but number of poles 6 utmost points then can be avoided the problems referred to above at number of poles.
In the present invention, said two magnetic poles preferably are respectively formed in 150 ° to 180 ° the angular range.If constitute like this; Then induction voltage waveform roughly becomes sine wave, therefore, can the decline of crest voltage be suppressed in 10% the allowed band; Even use when concentrating coiled stator and rotor, also can carry out the Spin Control of motor reliably as dipolar configuration.
In the present invention, said permanent magnet preferably is made up of two dividing permanent-magnet bodies that upwards are divided into said two magnetic poles in week.When adopting the annular permanent-magnet body; Centrifugal force when permanent magnet may be because of high speed rotating causes autoclasia; Therefore need the titanium system sleeve of costliness etc. be covered outer circumferential side with all pressure in applying; But when adopting the dividing permanent-magnet body, even high speed rotating can not cause autoclasia because of centrifugal force yet.Therefore, need not the titanium system sleeve of costliness is covered outer circumferential side, can reduce cost.
In the present invention, said two dividing permanent-magnet bodies are preferably formed as circular-arc into discontented 180 ° of arc chord angle.If constitute like this,, also can make the dividing permanent-magnet body remain on peritrochanteric reliably even then there is deviation in the forming accuracy of two dividing permanent-magnet bodies.
In this case, on said rotor, be preferably formed as the location division, the end face that is positioned at circumferential both ends of this location division and said two dividing permanent-magnet bodies is butt respectively.If constitute like this, two dividing permanent-magnet bodies are remained on the rotor with higher positional precision.In addition, even when rotor high-speed rotates, the dividing permanent-magnet body can be in upwards skew of week yet.
Best said rotor has the armature spindle that on outer peripheral face, keeps said two dividing permanent-magnet bodies; On the outer peripheral face of said armature spindle, be formed with two recesses chimeric with said two dividing permanent-magnet bodies; Position between said two recesses of said armature spindle is said location division, and the end face that is positioned at circumferential both ends of the circumferential both ends of the surface of this location division and said two dividing permanent-magnet bodies is butt respectively.In addition; Best said concave depth size is identical in fact with the gauge of said two dividing permanent-magnet bodies; Both sides at the axis direction of this recess; Upwards be formed with the recess more shallow whole week, in whole said shallow recess, be formed with the protective layer of the outer peripheral face of said two the dividing permanent-magnet bodies of protection than said recess.If constitute like this, then can two dividing permanent-magnet bodies imbedded the formation protective layer state in the armature spindle under, thereby can be more fixing dividing permanent-magnet body and prevent that it from dispersing.
In the present invention, in each said two dividing permanent-magnet body, the end face that preferably is positioned at circumferential both ends is positioned on the same plane each other.If constitute like this, dividing permanent-magnet body efficiently then can be shaped.In addition, as with the dividing permanent-magnet body with the end face stable state placement down that is positioned at both ends etc., in manufacturing process, handle the dividing permanent-magnet body easily.Two dividing permanent-magnet bodies are being configured under the epitrochanterian state, and the end face between two dividing permanent-magnet bodies is parallel, therefore, can two dividing permanent-magnet bodies be remained on the rotor with higher positional precision.
In the present invention, said two dividing permanent-magnet bodies are preferably in and wholely magnetize on circumferentially.
In the present invention, the best protected seam of the outer circumferential side of said permanent magnet covers.If constitute like this, even then rotor for example is the high-speed rotation of several ten thousand cycle per minute clocks with rotating speed, permanent magnet can be not damaged because of centrifugal force yet, and permanent magnet can not disperse yet.
In this case, the most handy resin of the fibrage of said protective layer is reinforced.If this protective layer then has the advantage that does not need expensive protective covers such as titanium sleeve.
In order to solve above-mentioned the 2nd technical problem; Rotor of the present invention comprises armature spindle and the permanent magnet that remains on this armature spindle periphery; It is characterized in that; The outer circumferential side protected seam of said permanent magnet covers, and the fibrage of this protective layer is reinforced by resin, in said protective layer; As said fibrage, second fibrage more than the width dimensions of the axis direction that width is said permanent magnet than little first fibrage of the width dimensions of the axis direction of said permanent magnet and width is wound on the outer circumferential side of said permanent magnet with the form that overlaps each other.
In the present invention, be formed for the protective layer that prevents that permanent magnet from dispersing through the fibrage of directly reeling at the outer circumferential side of permanent magnet.Therefore; Different with in the past, need not to carry out sheathed in the periphery of permanent magnet after having formed the tubular protective cover, as to be pressed into protective cover and so on operation with columned model assembly etc., also need not to be used to improve the fine finishining of the internal diameter precision of protective cover; Therefore, can improve the manufacturing efficient of rotor.In addition, in the present invention, protective cover is wound on the outer circumferential side of permanent magnet by different first fibrage of width dimensions and second fibrage and forms, so intensity is also high.Therefore, can prevent reliably that permanent magnet from dispersing.And protective layer of the present invention also can play the effect of permanent magnet with respect to the armature spindle secure fixation.
In the present invention, said first fibrage preferably with this first fibrage each other on Width local overlapping form reel.If constitute like this,,, therefore, can prevent that first fibrage from being that starting point is split with the pin hole because the first fibrage part is overlapping even when then on first fibrage, having produced pin hole etc.
In the present invention, the best helically of said first fibrage is reeled.If constitute like this, then first fibrage can efficiently be reeled with local overlapping state on Width each other.
In the present invention, in said first fibrage and second fibrage, the fibrolaminar coiling terminal part that preferably is wound on upper layer side at least is towards the direction opposite with the direction of rotation of said armature spindle.If constitute like this, then when rotor rotated, the terminal part that can prevent to reel was rolled because of blast.
In the present invention, can adopt said first fibrage to be wound on the structure that lower layer side, said second fibrage are wound on this first fibrolaminar upper layer side.If constitute like this, then the end of fibrolaminar Width is exposed degree and is diminished, and therefore, gas etc. get into the inlet contraction when inner.Therefore, for example can prevent that fibrage from rolling because of blast.In addition, also can eliminate concavo-convex on the protective layer outer peripheral face.
In the present invention, also can adopt said second fibrage to be wound on the structure that lower layer side, said first fibrage are wound on this second fibrolaminar upper layer side.
In the present invention, can adopt following structure, promptly on said armature spindle, the both end sides in the holding position of said permanent magnet is formed with a pair of large-diameter portion, and the fibrolaminar coiling face of said protective layer is positioned at the radially inner side of the outer peripheral face of said a pair of large-diameter portion.Adopt the rotor of this structure, protective cover in the past can't be set on the armature spindle, but if adopts the present invention, the rotor that then also can tackle this structure.
In the present invention, said second fibrage preferably has the size of separation equal widths size with said a pair of large-diameter portion.If constitute like this, then come the part between the landfill large-diameter portion with protective layer easily.
At this, said permanent magnet can adopt the chimeric structure of recess that forms on the outer peripheral face with said armature spindle.If constitute like this, then can limit permanent magnet moving on axis direction.
In the present invention, said concave depth size preferably equates in fact with the gauge of said permanent magnet.If constitute like this, then can permanent magnet imbedded fully the formation protective layer state in the recess under, reliably fixed permanent magnet and prevent that permanent magnet from dispersing.
In the present invention; Be preferably in the both sides of the axis direction of said recess; Upwards be formed with the recess more shallow whole week, in whole said shallow recess, be wound with said first fibrage and said second fibrage with the form that covers said permanent magnet periphery than said recess.If constitute like this, then can be not outstanding from the periphery of armature spindle as first fibrage and second fibrage of protective layer, can cover the periphery of permanent magnet with the form of landfill recess.
In the present invention, said first fibrage and said second fibrage preferably are made up of carbon fiber.
In the present invention, as said first fibrage and said second fibrage, can use all fibres all along the fibrage of a direction alignment of the direction of rotation of said armature spindle, the fibrage of fiber track and column braiding.But, preferably use cheap last fibrage in the present invention.Back one fibrage is with the fiber track and column braiding, and fiber is crooked on one side to intersect on one side.Therefore; In the time of on being wound up into the outer peripheral face of permanent magnet, can the hole be enlarged because of upwards extending in week, and; Be wound up on the outer peripheral face of permanent magnet and after making resin solidification; Damaged and will exist towards low problems of tensile strength such as radial direction outside elongations when disperse in the outside when permanent magnet, last fibrage then has the advantage that this problem can not take place.For last fibrage; If the fiber of each layer overlaps each other, then there is crackable problem between the fiber, on the other hand; For back one fibrage; The problem that then for example exists fiber to fracture easily at the position of the cross fibers of the fiber of horizontal expansion and longitudinal extension, but if with the fibrage multilayer-wound, then these problems can not appear.
In the present invention, said first fibrage and said second fibrage preferably have the preforming material of said resin to constitute by infiltration.If use preforming material, then infiltration in advance has resin in the fibrage, therefore, only needs behind the fibrage of having reeled, just heat to form protective layer, and has the good advantage of close property with permanent magnet etc.
The manufacturing approach that comprises the armature spindle and the rotor of the permanent magnet that remains on this armature spindle periphery of the present invention; It is characterized in that; Carry out:, cover the protective layer that fibrage is reinforced by resin at the outer circumferential side of said permanent magnet in the outer circumferential side coiling width of the said permanent magnet first fibrolaminar first fibrage coiling operation littler and in the outer circumferential side of the said permanent magnet second fibrolaminar second fibrage coiling operation more than the width dimensions of wide axis direction for this permanent magnet of reeling than the width dimensions of the axis direction of this permanent magnet.
In the present invention; What preferably use as said first fibrage and said second fibrage is the preforming material that infiltration has resin, after said first fibrage coiling operation and the said second fibrage coiling operation, the contained resin of said preforming material is heated and the hot curing operation of solidifying.
Used rotor of the present invention and in motor, used, this motor comprises: rotor of the present invention and the stator that produces rotating magnetic field with respect to this rotor.
Adopt the motor of the 1st invention, what use as stator is that coil is wound on a plurality of prominent concentrated coiled stators of extremely going up respectively, therefore, can reduce resistance etc. through the shortening coil end, can improve motor characteristics.In the present invention, rotor is a bipolar configurations, but two magnetic poles of permanent magnet be respectively formed at 135 ° to 180 °, better be in 150 ° to 180 ° the angular range, therefore upwards not form the regional little of magnetic pole in week.Therefore, can the decline of the crest voltage of induction voltage waveform be suppressed in 15% or even 10% the allowed band, if this decline then can be handled induction voltage waveform as sine wave.Therefore,, also can carry out the Spin Control of motor reliably, can reduce torque ripple and iron loss even when adopt to concentrate coiled stator and rotor be bipolar.
In addition, in the manufacturing approach of rotor, the rotor of the 2nd invention and have in the motor of this rotor, be formed for the protective layer that prevents that permanent magnet from dispersing through outer circumferential side coiling fibrage at permanent magnet.Therefore; Different with in the past, need not to carry out after having formed the tubular protective cover at the periphery cover of permanent magnet if be pressed into the operation of protective cover and so on columned model assembly etc., also need not to be used to improve the fine finishining of the internal diameter precision of protective cover; Therefore, can improve the manufacturing efficient of rotor.In addition, in the present invention, protective cover is wound on the outer circumferential side of permanent magnet by different first fibrage of width dimensions and second fibrage and forms, so intensity is also high.Therefore, can prevent reliably that permanent magnet from dispersing.And protective layer of the present invention also can play the effect of permanent magnet with respect to the armature spindle secure fixation.
Description of drawings
Fig. 1 is a structure chart of having used the motor of the 1st invention.
Fig. 2 (a), Fig. 2 (b) be respectively used the 1st invention rotor longitudinal sectional view and along the cutaway view of A-A ' line.
Fig. 3 is the process chart of the manufacturing approach of the expression rotor of having used the 1st invention.
Fig. 4 is the fibrolaminar key diagram that in manufacturing approach shown in Figure 3, uses.
Fig. 5 (a), Fig. 5 (b), Fig. 5 (c) are respectively the oscillograms of induced voltage when having used the arc chord angle that makes the dividing permanent-magnet body in the motor of the 1st invention and becoming 120 °, 150 °, 180 °, and Fig. 5 (d) is the curve chart of the decline ratio of crest voltage in arc chord angle and the induction voltage waveform of expression dividing permanent-magnet body.
Fig. 6 (a), Fig. 6 (b) are respectively the cutaway view of the expression improvement example of having used the rotor that uses in the motor of the 1st invention and the stereogram of dividing permanent-magnet body.
Fig. 7 is a structure chart of having used the motor of the 2nd invention.
Fig. 8 (a), Fig. 8 (b) be respectively used the 2nd invention rotor longitudinal sectional view and along the cutaway view of A-A ' line.
Fig. 9 is the stereogram of structure of the existing rotor of expression the 2nd invention.
(symbol description)
1 motor
2 stators
3 rotors
21 stator cores
The 21a utmost point of dashing forward
22 coils
30 armature spindles
32 yoke portions
33 permanent magnets
32a first recess
321,322 second recesses
The location division to the dividing permanent-magnet body of 325 rotors
331,332 dividing permanent-magnet bodies
39 protective layers
100 motors
200 stators
300 rotors
3000 armature spindles
3200 yoke portions
3200a first recess
3200b second recess
3300a, 3300b permanent magnet
3900 protective layers
Embodiment
(first example)
Describe having used motor of the present invention with reference to the accompanying drawings.First example describes the 1st invention.
(overall structure of motor)
Fig. 1 is a structure chart of having used motor of the present invention.Fig. 2 (a), Fig. 2 (b) have used the longitudinal sectional view of rotor of the present invention and along the cutaway view of the A-A ' line of Fig. 2 (a).
As shown in Figure 1, the motor 1 of this example is the inner rotor type motor that disposes rotor 3 in the inboard of ring-type stator 2, and stator 2 is accommodated in the shell 5 with rotor 3.
Shown in Fig. 1 and Fig. 2 (a), Fig. 2 (b), rotor 3 comprises armature spindle 30 and the permanent magnet 33 that remains in armature spindle 30 outer peripheral faces, and it is relative that the front end of the prominent utmost point 21a that the outer peripheral face of permanent magnet 33 and stator 2 are had separates specified gap.As permanent magnet 33, can use rare earth magnet and ferrimagnets such as neodymium magnet, what in this example, use is the neodymium magnet.
In this example, permanent magnet 33 is circular-arc two dividing permanent-magnet bodies 331,332 by the cross section and constitutes, and in dividing permanent-magnet body 331,332, the outside of a permanent magnet is geomagnetic into the N utmost point, and the outside of another permanent magnet is geomagnetic into the S utmost point.
Shown in Fig. 2 (a); On the outer peripheral face (outer peripheral face of yoke portion 32) of armature spindle 30; Axis direction in a big way in be formed with along whole circumferential extension, than after the first shallow recess 32a of second recess that states, be formed with identical large-diameter portion 30a, the 30b of diameter each other in the both end sides of axis direction.
Substantial middle position at the axis direction of the first recess 32a is formed with second recess 321,322 darker than the first recess 32a in the predetermined angular scope that makes progress in week, second recess 321, two positions between 322 that make progress in week become location division 325 respectively.Promptly; Chimericly respectively in second recess 321,322 fix with binding agent under the state of dividing permanent-magnet body 331,332; At this moment, the both ends of the surface 325a butt that the circumferential both ends of the surface 331a of dividing permanent-magnet body 331,332,332a are circumferential with location division 325 respectively is positioned.At this, the gauge of the depth dimensions of second recess 321,322 and dividing permanent-magnet body 331,332 is roughly the same, and therefore, second recess 321,322 is in by the state of dividing permanent-magnet body 331,332 landfills.
In the rotor 3 that constitutes like this, the outer circumferential side protected seam 39 of dividing permanent-magnet body 331,332 covers.Protective layer 39 is formed in the whole first recess 32a, and the first recess 32a is in the roughly state of complete landfill of protected seam 39.
In this example; Describe with reference to Fig. 3 and Fig. 4 as following; Protective layer 39 has the structure that fibrage is reinforced with thermosetting resins such as epoxy resin or phenolic resins; Can prevent that dividing permanent-magnet body 331,332 is damaged because of receiving centrifugal force, and can prevent that dividing permanent-magnet body 331,332 from dispersing when having received the centrifugal force breakage.
(manufacturing approach of rotor 3)
With reference to Fig. 3 (a)～Fig. 3 (f) and Fig. 4, the manufacturing approach of rotor 3 is described, and the structure of rotor 3 and protective layer 39 is elaborated.
Fig. 3 (a)～Fig. 3 (f) is the process chart that the manufacturing approach of rotor 3 of the present invention has been used in expression.Fig. 4 is a key diagram of having used protective layer 39 employed preforming material when forming of rotor 3 of the present invention.
When making the rotor 3 of this example, at first, shown in Fig. 3 (a),, be ready to be formed with the parts of the first recess 32a, second recess 321,322 and location division 325 as the yoke portion 32 of regulation armature spindle 30 outer peripheral faces.In this yoke portion 32, be formed with large- diameter portion 30a, 30b at its both ends.
Then, shown in Fig. 3 (b), make the dividing permanent-magnet body 331,332 after being magnetized chimeric with second recess 321,322 respectively, and utilize binding agent to fix.Consequently, second recess 321,322 is by dividing permanent-magnet body 331,332 landfills.Promptly; The outer peripheral face of dividing permanent-magnet body 331,332 is positioned at roughly the same height and position with the outer peripheral face of the first more shallow recess; Therefore, in second recess 321,322, insert dividing permanent-magnet body 331,332 after, the first more shallow recess 32a between large-diameter portion 30a, the 30b forms continuously.
Then, in the first fibrolaminar coiling operation shown in Fig. 3 (c), the width dimensions of reeling to the upper end from the lower end of the first recess 32a of yoke portion 32 is the first fibrage 38a of w1.The direction of rotation of the coiling direction of the first fibrage 38a and armature spindle 30 (yoke portion 32) is opposite.
The first fibrage 38a is that width dimensions is the strip carbon prepreg of w1, and in this carbon prepreg, thermosetting resin has infiltrated in carbon fiber layer.This carbon prepreg is tack-free because of thermosetting resin is in semi-cured state, and therefore, the operation property during coiling might as well.
The width dimensions w1 of the first fibrage 38a is narrower than the width dimensions w3 on the axis direction of cutting apart permanent magnet 331,332.Therefore; When reeling the first fibrage 38a to the upper end from the lower end of the first recess 32a of yoke portion 32; The helically first fibrage 38a that reels on the outer peripheral face of dividing permanent-magnet body 331,332, and make the first fibrage 38a local overlapping on Width each other.That is, the first fibrage 38a is reeled a circle along the lower end of the first recess 32a after, when carrying out the later coiling of second circle, the helically first fibrage 38a that reels in yoke portion 32.Thus, the first fibrage 38a is wound in the yoke portion 32 with the form with respect to the axis direction diagonal cross.Consequently; The n that is reeled (n >=2) circle first fibrage 38a and (n+1) circle first fibrage 38a that is reeled reel with roughly 1/2 the width dimensions of width dimensions w1 overlappingly, thereby at the outer circumferential side of dividing permanent-magnet body 331, the 332 two-layer first fibrage 38a that reels.Then, shown in Fig. 3 (d),, then first fibrage 38a coiling one is enclosed along the upper end of the first recess 32a if the first fibrage 38a has arrived the upper end of the first recess 32a.At this, because the direction of rotation of the coiling direction of the first fibrage 38a and armature spindle 30 (yoke portion 32) is opposite, therefore the coiling terminal part of the first fibrage 38a is towards the direction opposite with the direction of rotation of armature spindle 30.
Then, in the second fibrage coiling operation shown in Fig. 3 (e), the outer circumferential side of the first fibrage 38a in being wound on the first recess 32a is the second fibrage 38b coiling regulation number of turns, for example 5 layers of w2 with width dimensions.The coiling direction of the second fibrage 38b is also the same with the first fibrage 38a, and is opposite with the direction of rotation of armature spindle 30 (yoke portion 32).
The second fibrage 38b is that width dimensions is the strip carbon prepreg of w2, and this carbon prepreg is the same with the first fibrage 38a, and thermosetting resin has infiltrated in carbon fiber layer.The width dimensions w2 of the second fibrage 38b is bigger than cutting apart the width dimensions w3 of permanent magnet 331,332 on axis direction, with the width dimensions (separating distance of large- diameter portion 30a, 30b) of the first recess 32a about equally.Therefore, when on the outer peripheral face of the first fibrage 38a, covering the second fibrage 38b, the second fibrage 38b roughly reels on quadrature ground with respect to axis direction.
Consequently, shown in Fig. 3 (f), the first recess 32a is by the complete landfill of the second fibrage 38b.In addition, because the direction of rotation of the coiling direction of the second fibrage 38b and armature spindle 30 (yoke portion 32) is opposite, therefore the coiling terminal part of the second fibrage 38b is towards the direction opposite with the direction of rotation of armature spindle 30.
Then, in the hot curing operation, in to the first fibrage 38a and second fibrage 38b heating, yoke portion 32 vacuum draves are outgased, the first fibrage 38a and the second fibrage 38b are close to.In addition, make the thermosetting resin hot curing that is infiltrated up in the first fibrage 38a and the second fibrage 38b, reinforce the first fibrage 38a and the second fibrage 38b with thermosetting resin.Thus, can form protective layer 39 with the form of the complete landfill first recess 32a.
When making rotor 3 like this; In this example; Shown in Fig. 4 (a), as the first fibrage 38a and the second fibrage 38b, use be carbon prepreg at thermosetting resin that carbon fiber has been infiltrated in the fibrage of a direction alignment of the direction of rotation (circumferentially) of armature spindle 30.In addition; In the present invention; Shown in Fig. 4 (b); As the first fibrage 38a and the second fibrage 38b, also can use the carbon prepreg that is made into the thermosetting resin that infiltrated in the cancellous fibrage at the carbon fiber that will extend along the direction of rotation (circumferentially) of armature spindle 30 with along the carbon fiber of axis direction (vertically) extension of armature spindle 30.But; The carbon prepreg that is made into the thermosetting resin that infiltrated in the cancellous fibrage with the carbon fiber that extends at carbon fiber that will extend along the direction of rotation (circumferentially) of armature spindle 30 and axis direction (vertically) along armature spindle 30 shown in Fig. 4 (b) is compared, and the carbon prepreg of the thermosetting resin that in the fibrage that carbon fiber is alignd along a direction of the direction of rotation (circumferentially) of armature spindle 30, infiltrated shown in Fig. 4 (a) has advantages of being cheap.In addition; The carbon prepreg that is made into the thermosetting resin that infiltrated in the cancellous fibrage with the carbon fiber that extends at carbon fiber that will extend along the direction of rotation (circumferentially) of armature spindle 30 and axis direction (vertically) along armature spindle 30 shown in Fig. 4 (b) is compared, and the carbon prepreg of the thermosetting resin that in the fibrage that carbon fiber is alignd along a direction of the direction of rotation (circumferentially) of armature spindle 30, infiltrated shown in Fig. 4 (a) has the high advantage of tensile strength.Promptly; For shown in Fig. 4 (b) at the carbon prepreg that carbon fiber is made into the thermosetting resin that infiltrated in the cancellous fibrage; When dividing permanent-magnet body 331,332 disperses; Form cancellous part and on the axis direction (vertically) of armature spindle 30 and direction of rotation (circumferentially) both direction, stretch, therefore, dividing permanent-magnet body 331,332 may disperse from this stretched portion.On the other hand; Because the carbon prepreg shown in Fig. 4 (a) is the carbon prepreg of thermosetting resin of in the fibrage that aligns along a direction of the direction of rotation (circumferentially) of armature spindle 30, having infiltrated; Therefore the carbon prepreg that kind of carbon fiber shown in can image pattern 4 (b) stretches on both direction; The tensile strength that particularly makes progress in week is good, therefore, can prevent more reliably that dividing permanent-magnet body 331,332 from dispersing.Carbon fiber may split along the direction of rotation (circumferentially) of armature spindle 30, but in this example, the fibrage through making the outer peripheral face that covers dividing permanent-magnet body 331,332 on Width local overlapping and with helical coil around, can suppress carbon fiber and split.
In this example, the second fibrage 38b that after the outer circumferential side of dividing permanent-magnet body 331,332 has been reeled the first fibrage 38a, reels again, but the first fibrage 38a that also can behind the second fibrage 38b that reeled, reel again.That is, also can after the second fibrage coiling operation, carry out the first fibrage coiling operation.
(detailed structure of rotor 3)
As stated, in the motor 1 of this example, what use as stator 2 is that coil 22 is wound on concentrated coiled 6 utmost point stators on a plurality of prominent utmost point 21a respectively, and rotor 3 is a bipolar configurations.Adopt this structure, the induction voltage waveform that obtains from coil 22 during rotor 3 rotations may distortion.
Therefore; In this example; The result of study that describes with reference to Fig. 5 based on the back, with dividing permanent-magnet body 331,332 all form arc chord angle be 135 ° to 180 °, better be 150 ° to 180 ° circular-arc, and make the arc chord angle of dividing permanent-magnet body 331,332 equal.In addition, dividing permanent-magnet body 331,332 all magnetizes on circumferentially whole.Therefore, in this example, on permanent magnet 33, two magnetic poles that are made up of the S utmost point and the N utmost point are respectively formed at 135 ° to 180 °, better being formed in 150 ° to 180 ° the angular range.But, in the permanent magnet 33 shown in Fig. 1 and Fig. 2 (a), discontented 180 ° of the arc chord angle of dividing permanent-magnet body 331,332 (angular ranges of two magnetic poles that constitute by the S utmost point and the N utmost point).
Setting the arc chord angle of dividing permanent-magnet body 331,332 for 180 ° structure is equivalent to that location division 325 is not set, makes second recess 321,322 on the whole circumference of armature spindle 30, form the structure of second recess continuously on rotor 3.
(result of study of induction voltage waveform)
In this example, shown in Fig. 2 (b), permanent magnet 33 uses is to have carried out magnetized dividing permanent-magnet body 331,332 whole on circumferentially, and the arc chord angle θ of dividing permanent-magnet body 331,332 equates.Therefore, the variation of induction voltage waveform when 120 ° are changed to 180 ° is studied to the arc chord angle θ (angular ranges of two magnetic poles of permanent magnet 33) that makes dividing permanent-magnet body 331,332.Fig. 5 (a) and (b), (c), (d) have represented its result.
Fig. 5 (a) and (b), (c) are respectively the oscillograms of induced voltage when making the arc chord angle θ of dividing permanent-magnet body 331,332 be varied to 120 °, 150 °, 180 °, and Fig. 5 (d) is the curve chart of decline ratio of crest voltage of arc chord angle θ and the induction voltage waveform of expression dividing permanent-magnet body 331,332.
Can be known that by Fig. 5 (a) and (b), (c), (d) the arc chord angle θ of dividing permanent-magnet body 331,332 is big more as 120 °, 150 °, 165 °, 180 °, the decline of the crest voltage of induction voltage waveform is just more little, and waveform is more approaching sinusoidal wave.Therefore; If the arc chord angle θ with dividing permanent-magnet body 331,332 as this example sets 135 ° to 180 ° angular range for; Then can the decline of the crest voltage of induction voltage waveform be suppressed to below 15%; Therefore, even when use to concentrate coiled stator and rotor 3 be bipolar, also can carry out the Spin Control of motor 1 reliably.In addition, if set the arc chord angle θ of dividing permanent-magnet body 331,332 for 150 ° to 180 ° angular range, then can the decline of the crest voltage of induction voltage waveform be suppressed to below 10%.
(the main effect of first example)
As stated, in this example, what use as stator 2 is that coil 22 is wound on the concentrated coiled stator on a plurality of prominent utmost point 21a respectively, therefore, can reduce resistance etc. through the shortening coil end, can improve motor characteristics.In addition, in this example, rotor 3 is a bipolar configurations, but two magnetic poles of permanent magnet 33 be respectively formed at 135 ° to 180 ° angular range, better be that it is very narrow that week does not upwards form the zone of magnetic pole in 150 ° to 180 ° the angular range.Therefore, can the decline of the crest voltage of induction voltage waveform be suppressed to below 15%, or even be suppressed to below 10%, if such decline then can be handled waveform as sine wave.Therefore,, also can carry out the Spin Control of motor 1 reliably, can reduce torque ripple and iron loss even when use to concentrate coiled stator 2 and rotor 3 be bipolar.
In this example, because stator 2 is 6 utmost points, therefore can reduce iron loss, and can avoid the problem that torque reduces, cogging torque increases, the utilization ratio of permanent magnet magnetic flux descends.That is, during greater than 6 utmost points, iron loss increases at number of poles, and during less than 6 utmost points, the problem that torque reduces, cogging torque increases, the utilization ratio of permanent magnet magnetic flux descends then can take place, if but number of poles 6 utmost points then can be avoided the problems referred to above at number of poles.
In this example, what use as permanent magnet 33 is dividing permanent-magnet body 331,332, therefore need not to cover expensive titanium system sleeve at outer circumferential side, can reduce cost.Promptly; Centrifugal force in the time of may be because of high speed rotating when adopting the annular permanent-magnet body causes autoclasia; Therefore need outer circumferential side cover expensive titanium system sleeve wait apply in all pressure; But adopting the dividing permanent-magnet body at 331,332 o'clock, even high speed rotating can not cause autoclasia because of centrifugal force yet.Therefore; As with reference to Fig. 3 and Fig. 4 explanation, can be formed for preventing the breakage of dividing permanent-magnet body 331,332, the protective layer 39 that disperses through outer circumferential side coiling carbon prepreg (the first fibrage 38a and the second fibrage 38b) at dividing permanent-magnet body 331,332.Therefore, can save after forming expensive protective covers such as titanium system sleeve cylindraceous and to overlap in the periphery of permanent magnet if be pressed into the operation of protective cover, also can save the fine finishining of the internal diameter precision that is used to improve protective cover.
In this example, because the first fibrage 38a and the second big fibrage 38b multilayer-wound of width that width is little, so the intensity of protective layer 39 is big.Therefore, can prevent reliably that dividing permanent-magnet body 331,332 from dispersing, and protective layer 39 can play with dividing permanent-magnet body 331,332 effects with respect to armature spindle 30 secure fixation.The little first fibrage 38a helical coil of image width degree, can be reeled according to fibrolaminar width dimensions to cover that kind such as form coiling of whole Width around the big second fibrage 38b of, width.Therefore, can form the big protective layer of intensity 39 effectively.
Owing to form protective layer 39 through outer circumferential side coiling carbon prepreg (the first fibrage 38a and the second fibrage 38b) at dividing permanent-magnet body 331,332; Therefore, even when the coiling face of the first fibrage 38a and the second fibrage 38b is located at the radially inner side of outer peripheral face of a pair of large-diameter portion 30a that the both end sides of the holding position of dividing permanent-magnet body 331,332 forms, 30b, also can tackle.Promptly; For after having formed protective cover cylindraceous, overlapping if be pressed into the structure of protective cover in the periphery of permanent magnet; If the both end sides in the holding position of dividing permanent-magnet body 331,332 is formed with large- diameter portion 30a, 30b, then can't protective cover cylindraceous be enclosed within and covers permanent magnet on the armature spindle, but adopt this example; Even the rotor of this structure 3, also available protective layer 39 covers the outer circumferential side of permanent magnet.When forming protective layer 39, a kind of carbon prepreg also can obtain this effect when reeling at the outer circumferential side of dividing permanent-magnet body 331,332.
In this example because the first fibrage 38a helically is reeled, therefore easily at the outer circumferential side of dividing permanent-magnet body 331,332 with the first fibrage 38a that reels of local overlapping state on Width.
In this example, what use as the first fibrage 38a and the second fibrage 38b is the carbon prepreg of thermosetting resin of in carbon fiber layer, having infiltrated, therefore, only need behind coiling, heat just can make thermosetting resin cured.Therefore, need not the resin that behind coiling, infiltrates, can form protective layer 39 efficiently.
In this example, shown in Fig. 4 (a), what use as the first fibrage 38a and the second fibrage 38b is with infiltrated in the carbon fiber layer of the direction alignment carbon prepreg of thermosetting resin of the formation direction of fiber.The carbon prepreg of this structure is more cheap than the carbon prepreg shown in Fig. 4 (b).Therefore, protective layer 39 can be made at an easy rate, thereby the manufacturing cost of rotor 3 can be reduced.At this; Infiltrated in the carbon fiber layer of the direction alignment carbon prepreg of thermosetting resin of the formation direction of fiber may be split along the bearing of trend of fiber; But in this example; Owing to, therefore can prevent this splitting with the first fibrage 38a and the second fibrage 38b multilayer-wound.In addition; Because the first fibrage 38a helically is reeled, and fiber is intersected with each other, even therefore use when the formation direction of fiber has been infiltrated the carbon prepreg of thermosetting resin in the carbon fiber layer of a direction alignment; Also be not easy to split, can form high-intensity protective layer 39.
In this example, the coiling direction of the second fibrage 38b that reels at outer circumferential side at least is opposite with the direction of rotation of armature spindle 30 (yoke portion 32), and therefore, the coiling terminal part of the second fibrage 38b is towards the direction opposite with the direction of rotation of armature spindle 30.Therefore, when armature spindle 30 rotation, has the advantage that the coiling terminal part can not rolled because of blast.
Second recess 321,322 that forms on the outer peripheral face of dividing permanent-magnet body 331,332 and armature spindle 30 is chimeric, and the gauge of the depth dimensions of second recess 321,322 and dividing permanent-magnet body 331,332 about equally.Therefore, can under the state of dividing permanent-magnet body 331,332 being imbedded fully in second recess 321,322, form protective layer 39, can be reliably fixing dividing permanent-magnet body 331,332 and prevent that dividing permanent-magnet body 331,332 from dispersing.
(another example of first example)
In above-mentioned example; The circumferential both ends of the surface 331a of dividing permanent-magnet body 331,332,332a with respect to the center of rotor 3 all with radial formation; But but the also that kind shown in image pattern 6 (a), Fig. 6 (b) makes the end face 331a, the 332a that are positioned at circumferential both ends be positioned on the same plane on two dividing permanent-magnet bodies 331,332 respectively.If constitute like this, then can form dividing permanent-magnet body 331,332 efficiently.In addition, as with dividing permanent-magnet body 331,332 with the end face stable state placement down that is positioned at both ends etc., in manufacturing process, handle dividing permanent-magnet body 331,332 easily.Under the state that two dividing permanent-magnet bodies 331,332 are configured on the rotor 3; Two dividing permanent-magnet bodies 331, the end face 331a between 332,332a are parallel; Therefore, can two dividing permanent-magnet bodies 331,332 be remained on the rotor 3 with higher positional precision.
In above-mentioned example, what use as permanent magnet 33 is dividing permanent-magnet body 331,332, but the situation of the structure that also can apply the present invention to the magnetic of the one cylindraceous that constitutes permanent magnet is magnetized two magnetic pole anisotropy of the S utmost point and the N utmost point.That is, also can adopt two magnetic poles of cylindric permanent magnet 33 be respectively formed at 135 ° to 180 ° angular range, better be structure in 150 ° to 180 ° the angular range.
In above-mentioned example, adopted the protective layer 39 that will use the carbon prepreg to cover the structure of the outer circumferential side of permanent magnet 33, but also can apply the present invention to be coated with the motor of titanium system sleeve at outer circumferential side.
(second example)
With reference to the accompanying drawings rotor and the manufacturing approach of this rotor of having used motor of the present invention, be installed on this motor are described.Second example describes the 2nd invention.
(overall structure of motor)
Fig. 7 is a structure chart of having used motor of the present invention.Fig. 8 (a), Fig. 8 (b) have used the longitudinal sectional view of rotor of the present invention and along the cutaway view of the A-A ' line of Fig. 8 (a).
As shown in Figure 7, the motor 100 of this example is the inner rotor type motor that disposes rotor 300 in the inboard of ring-type stator 200, and stator 200 is accommodated in the shell 400 with rotor 300.
Stator 200 has the stator core 2100 of ring-type, and stator core 2100 has 6 side-prominent prominent utmost point 2100a in the radial direction.On 6 prominent utmost point 2100a, be wound with coil 2200 respectively, constitute and concentrate coiled 6 utmost point stators.Adopt this structure, stator 200 produces rotating magnetic field with respect to rotor 300.
Shown in Fig. 7 and Fig. 8 (a), Fig. 8 (b), rotor 300 comprises armature spindle 3000 and the permanent magnet 3300a, the 3300b that remain in armature spindle 3000 outer peripheral faces, and it is relative that the prominent utmost point 2100a that the outer peripheral face of rotor 300 and stator 200 are had separates specified gap.
Shown in Fig. 8 (a); Position in the way of the length direction of armature spindle 3000; On the outer peripheral face (outer peripheral face of yoke portion 3200) of armature spindle 3000; Axis direction in a big way in be formed with along circumferentially extend, than after the first shallow recess 3200a of the second recess 3200b that states, be formed with identical large-diameter portion 3000a, the 3000b of diameter each other in the both end sides of axis direction.
Be formed with darker and at the upwardly extending second recess 3200b of week than the first recess 3200a in the substantial middle position of the axis direction of the first recess 3200a.Chimeric permanent magnet 3300a, 3300b in the second recess 3200b.At this, the depth dimensions of the second recess 3200b and permanent magnet 3300a, 3300b are roughly the same, and therefore the second recess 3200b is in the state of landfill roughly by permanent magnet 3300a, 3300b.
In the rotor 300 that constitutes like this, the outer circumferential side protected seam 3900 of permanent magnet 3300a, 3300b covers.Protective layer 3900 is formed in the whole first recess 3200a, and the first recess 3200a is in the roughly state of complete landfill of protected seam 3900.
In this example; In the explanation of the 1st invention first example, describe with reference to Fig. 3 (a)～Fig. 3 (f) and Fig. 4 (a), Fig. 4 (b); Protective layer 3900 has the structure that fibrage is reinforced by thermosetting resins such as epoxy resin or phenolic resins; Can prevent that permanent magnet 3300a, 3300b are damaged because of receiving centrifugal force, and can prevent that permanent magnet 3300a, 3300b from dispersing when having received the centrifugal force breakage.
(manufacturing approach of rotor 300)
Compare with the manufacturing approach of rotor of the 1st invention first example of explaining with reference to Fig. 3 (a)～Fig. 3 (f) and Fig. 4 (a), Fig. 4 (b); The difference of having used the manufacturing approach of rotor 300 of the present invention is not form on the armature spindle 3000 location division; And other structure is identical, the detailed description of therefore omitting the manufacturing approach of rotor 300 of the present invention.In the explanation below, to total first fibrage of the 1st invention and the 1st invention of the second fibrage mark in employed symbol and omit its explanation.
(the main effect of second example)
As stated, in this example,, formed the protective layer 3900 that is used to prevent that permanent magnet 3300a, 3300b are damaged, disperses through outer circumferential side coiling carbon prepreg (the first fibrage 38a and the second fibrage 38b) at permanent magnet 3300a, 3300b.Therefore, different with structure with reference to Fig. 9 explanation, can save and formed using a model parts behind the tubular protective cover at the periphery cover of permanent magnet if be pressed into the operation of protective cover and so on, also can save the fine finishining of the internal diameter precision that is used to improve protective cover.Therefore, adopt this example, can improve the manufacturing efficient of rotor 300.
In this example, because the first fibrage 38a and the second big fibrage 38b multilayer-wound of width that width is little, so the intensity of protective layer 3900 is big.Therefore, can prevent reliably that permanent magnet 3300a, 3300b from dispersing, and protective layer 3900 can play the effect with respect to armature spindle 3000 secure fixation with permanent magnet 3300a, 3300b.The little first fibrage 38a helical coil of image width degree, can be reeled according to fibrolaminar width dimensions to cover that kind such as form coiling of whole Width around the big second fibrage 38b of, width.Therefore, can form the big protective layer of intensity 3900 effectively.
Owing to form protective layer 3900 through outer circumferential side coiling carbon prepreg (the first fibrage 38a and the second fibrage 38b) at permanent magnet 3300a, 3300b; Therefore, even when the coiling face of the first fibrage 38a and the second fibrage 38b is located at the radially inner side of outer peripheral face of a pair of large-diameter portion 3000a that the both end sides of the holding position of permanent magnet 3300a, 3300b forms, 3000b, also can tackle.Promptly; In structure with reference to Fig. 9 explanation; If the both end sides in the holding position of permanent magnet 3300a, 3300b is formed with large-diameter portion 3000a, 3000b, then can't protective cover cylindraceous be enclosed within and covers permanent magnet on the armature spindle, but adopt this example; Even the rotor of this structure 300, also available protective layer 3900 covers the outer circumferential side of permanent magnet., a kind of carbon prepreg of reeling at the outer circumferential side of permanent magnet 3300a, 3300b also can obtain this effect when forming protective layer 3900.
In this example because the first fibrage 38a helically is reeled, therefore easily at the outer circumferential side of permanent magnet 3300a, 3300b with the first fibrage 38a that reels of local overlapping state on Width.
In this example, what use as the first fibrage 38a and the second fibrage 38b is the carbon prepreg of thermosetting resin of in carbon fiber layer, having infiltrated, therefore, only need behind coiling, heat just can make thermosetting resin cured.Therefore, need not the resin that behind coiling, infiltrates, can form protective layer 3900 efficiently.And, when using the carbon prepreg, also have and permanent magnet 3300a, 3300b, large-diameter portion 3000a, 3000b between the also good advantage of close property.
In this example; Shown in Fig. 4 (a), what use as the first fibrage 38a and the second fibrage 38b is the carbon prepreg of thermosetting resin of having infiltrated in the carbon fiber layer that the formation direction of carbon fiber is alignd along a direction of the direction of rotation (circumferentially) of armature spindle 3000.The carbon prepreg of this structure is made into cancellous carbon prepreg cheapness than the carbon fiber that will extend along the direction of rotation (circumferentially) of armature spindle 3000 shown in Fig. 4 (b) with along the carbon fiber that the axis direction (vertically) of armature spindle 3000 extends.Therefore, protective layer 3900 can be made at an easy rate, thereby the manufacturing cost of rotor 300 can be reduced.In addition, because the tensile strength of the carbon prepreg of this structure is bigger than the carbon prepreg shown in Fig. 4 (b), therefore has and to prevent advantages such as permanent magnet 3300a, 3300b disperse more reliably.At this; Infiltrated in the carbon fiber layer of the direction alignment carbon prepreg of thermosetting resin of the formation direction of fiber may be split along the bearing of trend of fiber; But in this example; Owing to, therefore can prevent this splitting with the first fibrage 38a and the second fibrage 38b multilayer-wound.In addition; Because the first fibrage 38a helically is reeled, and fiber is intersected with each other, even therefore use when the formation direction of fiber infiltrated the carbon prepreg of thermosetting resin in the carbon fiber layer of a direction alignment; Also be not easy to split, can form high-intensity protective layer 3900.
In this example; At least the coiling direction of the second fibrage 38b that reels at outer circumferential side is opposite with the direction of rotation of armature spindle 3000 (yoke portion 3200); Therefore, the coiling terminal part of the second fibrage 38b is towards the direction opposite with the direction of rotation of armature spindle 3000.Therefore, when armature spindle 3000 rotation, has the advantage that the coiling terminal part can not rolled because of blast.
In this example, the first fibrage 38a is wound in lower layer side, and the second fibrage 38b is wound in the upper layer side of the first fibrage 38a.If constitute like this, then can reduce the path of process when getting between the first fibrage 38a and the second fibrage 38b from the outside such as gas, so for example can prevent that fibrage 38b from rolling because of blast.In addition, also can eliminate concavo-convex on protective layer 3900 outer peripheral faces.
The second recess 3200b that forms on the outer peripheral face of permanent magnet 3300a, 3300b and armature spindle 3000 is chimeric, and the gauge of the depth dimensions of the second recess 3200b and permanent magnet 3300a, 3300b about equally.Therefore; Can under the state of permanent magnet 3300a, 3300b being imbedded fully in the second recess 3200b, form protective layer 3900; Fixed permanent magnet 3300a, 3300b limit permanent magnet 3300a, 3300b moving on axis direction, and prevent that permanent magnet 3300a, 3300b from dispersing reliably.In addition,, between the first recess 3200a and permanent magnet 3300a, 3300b, can not produce difference of height, therefore can fibrage 38a, 38b be wound up under the situation of difference of height on the outer peripheral face of armature spindle 3000 not having through such formation.Therefore, can form the big protective layer of intensity 3900 efficiently.
(another example of second example)
In above-mentioned example, the second fibrage 38b that after the outer circumferential side of permanent magnet 3300a, 3300b has been reeled the first fibrage 38a, reels again, but in the present invention, the first fibrage 38a more also can reel behind the second fibrage 38b that reeled.That is, also can after the second fibrage coiling operation, carry out the first fibrage coiling operation.
Claims (9)
1. motor comprises: a plurality of prominently is wound with the stator of coil on extremely and has that front end with the said prominent utmost point separates the space and the rotor of permanent magnet opposed is characterized in that outstanding towards radial direction,
Said stator is that said coil is wound on said a plurality of prominent concentrated coiled stator of extremely going up respectively,
Said permanent magnet is a dipolar configuration, and the S utmost point and the N utmost point respectively have one,
Said two magnetic poles are respectively formed in 135 ° to 180 ° the angular range, and are formed on each other in the angle same scope,
Said stator is 6 electrode structures with 6 said prominent utmost points,
The outer circumferential side protected seam of said permanent magnet covers, and the fibrage of said protective layer is reinforced by resin,
In said protective layer; As said fibrage, second fibrage more than the width dimensions of the axis direction that width is said permanent magnet than little first fibrage of the width dimensions of the axis direction of said permanent magnet and width is wound on the outer circumferential side of said permanent magnet with the form that overlaps each other.
2. motor as claimed in claim 1 is characterized in that, said two magnetic poles are respectively formed in 150 ° to 180 ° the angular range.
3. motor as claimed in claim 1 is characterized in that, said permanent magnet is made up of two dividing permanent-magnet bodies that upwards are divided into said two magnetic poles in week.
4. motor as claimed in claim 3 is characterized in that, said two dividing permanent-magnet bodily forms become the circular-arc of discontented 180 ° of arc chord angle.
5. motor as claimed in claim 4 is characterized in that, on said rotor, is formed with the location division, and the end face that is positioned at circumferential both ends of this location division and said two dividing permanent-magnet bodies is butt respectively.
6. motor as claimed in claim 5 is characterized in that,
Said rotor has the armature spindle that on outer peripheral face, keeps said two dividing permanent-magnet bodies,
On the outer peripheral face of said armature spindle, be formed with two recesses chimeric with said two dividing permanent-magnet bodies,
Position between said two recesses of said armature spindle is said location division,
The end face that is positioned at circumferential both ends of the circumferential both ends of the surface of said location division and said two dividing permanent-magnet bodies is butt respectively.
7. motor as claimed in claim 6 is characterized in that,
Said concave depth size is identical in fact with the gauge of said two dividing permanent-magnet bodies, and the both sides at the axis direction of said recess upwards are being formed with the recess more shallow than said recess whole week,
In whole said shallow recess, be formed with the protective layer of the outer peripheral face of said two the dividing permanent-magnet bodies of protection.
8. motor as claimed in claim 3 is characterized in that, in each said two dividing permanent-magnet body, the end face that is positioned at circumferential both ends is positioned on the same plane each other.
9. motor as claimed in claim 3 is characterized in that, said two dividing permanent-magnet bodies magnetize on circumferentially whole.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
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| JP2007177869 | 2007-07-06 | ||
| JP2007-177870 | 2007-07-06 | ||
| JP2007-177869 | 2007-07-06 | ||
| JP2007177870 | 2007-07-06 | ||
| JP2007177870A JP5128864B2 (en) | 2007-07-06 | 2007-07-06 | motor |
| JP2007177869A JP4932620B2 (en) | 2007-07-06 | 2007-07-06 | Rotor, rotor manufacturing method, and motor |
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| CN201210239970.8A Division CN102751801B (en) | 2007-07-06 | 2008-07-02 | Motor, and rotor, and manufacturing method for the rotor, and a motor provided with the rotor |
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| CN101340115A CN101340115A (en) | 2009-01-07 |
| CN101340115B true CN101340115B (en) | 2012-09-05 |
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| CN103368300A (en) * | 2012-03-26 | 2013-10-23 | 珠海格力电器股份有限公司 | Motor permanent magnet fixing structure, fixing method and motor comprising structure |
| CN103779985A (en) * | 2012-10-23 | 2014-05-07 | 海尔集团公司 | Rotor, manufacturing method thereof, motor with rotor and linear compressor |
| JP6127504B2 (en) * | 2012-12-26 | 2017-05-17 | 日立金属株式会社 | Magnet roller and method of manufacturing magnet roller |
| CN106460773B (en) * | 2014-05-30 | 2019-12-10 | 海洋能源公司 | Hydroelectric turbine, anchoring structure and associated assembly method |
| CN204810096U (en) * | 2014-12-11 | 2015-11-25 | 德昌电机(深圳)有限公司 | Motor, pump and belt cleaning device |
| JP6880668B2 (en) * | 2016-11-16 | 2021-06-02 | トヨタ紡織株式会社 | Rotating machine rotor |
| GB2563615B (en) * | 2017-06-20 | 2020-02-12 | Dyson Technology Ltd | A rotor assembly and method of manufacture thereof |
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Also Published As
| Publication number | Publication date |
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| JP2009017708A (en) | 2009-01-22 |
| JP4932620B2 (en) | 2012-05-16 |
| CN101340115A (en) | 2009-01-07 |
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