CN102738935A - Motor - Google Patents
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- CN102738935A CN102738935A CN2012100888038A CN201210088803A CN102738935A CN 102738935 A CN102738935 A CN 102738935A CN 2012100888038 A CN2012100888038 A CN 2012100888038A CN 201210088803 A CN201210088803 A CN 201210088803A CN 102738935 A CN102738935 A CN 102738935A
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- 229910000831 Steel Inorganic materials 0.000 claims description 100
- 239000010959 steel Substances 0.000 claims description 100
- 230000002093 peripheral effect Effects 0.000 claims description 30
- 238000003475 lamination Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001149 cognitive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Provided is a motor. A bearing part of the motor is disposed in a radial inner side of a cylinder-shaped magnet holder having a cover, and thereby the axial position of the magnet can overlap with that of the bearing part. The axial size of the motor can be limited. The magnet holder comprises a positioning plate having a plurality of protruding parts protruding from the radial inner side of the magnet to the outer side. The plurality of magnets are disposed at the circumferential position defined by a plurality of protruding parts. Accordingly, circumferential positioning of the magnet can be conducted with high accuracy, and the back electromotive force (EMF) waveform of the motor becomes stable.
Description
Technical field
The present invention relates to inner-rotor type motor.
Background technology
In the past, made the inner-rotor type motor of rotating part sideway swivel in coil cognitive by everybody with magnet.For example, in TOHKEMY 2006-109575 communique, put down in writing the brushless motor that comprises rotor and stator.This rotor has magnet, and this stator arrangement is at the outer circumferential side of this rotor.In addition, in TOHKEMY 2009-261191 communique, put down in writing and comprised and be fixed in the inner stator of motor chassis and have a plurality of motors that separate the rotor of shape magnet that these a plurality of separation shape magnet configuration are opposed with the inner surface of stator core.
In TOHKEMY 2006-109575 communique, magnet is entrenched in the outer peripheral face (0049 paragraph) of yoke.But if the outer peripheral face of the yoke in TOHKEMY 2006-109575 communique is installed a plurality of magnet, adjacent magnet can be attracted each other etc., is difficult to the circumferential position of each magnet of decision.In addition, yoke is under the situation of drawing article, is provided for magnet very difficult in the shape that circumferentially positions at yoke itself.
If the skew of the circumferential position of a plurality of magnet, then circumferential pole change can produce deviation.The deviation of magnetic pole becomes the reason of the back emf waveform when upsetting motor operations.If the back emf waveform multilated, then the electrical characteristic of motor will worsen.In addition, owing to produce the pulsation of torque, vibration and noise can take place sometimes.
On the other hand, in TOHKEMY 2009-261191 communique, put down in writing in the rotor yoke setting and blocked the border teat that separates shape magnet.(claim 1 etc.).But, in TOHKEMY 2009-261191 communique, the bearing that is used for back shaft be configured in the prism shape rotor yoke about (0015 paragraph, 0022 paragraph, Fig. 1).In such structure, suppress motor drive shaft to the size difficulty that becomes.
Particularly, the rotor yoke in the TOHKEMY 2009-261191 communique is many steel plates of lamination and form (0015 paragraph).Many steel plates are laminated into the yoke cylindraceous of lid that has as TOHKEMY 2006-109575 communique, and former is difficult.That is to say, realize simultaneously yoke is made into that lid is cylindric to be suppressed the axial dimension of motor and circumferentially magnet is being positioned accurately, is the problem that is attended by technical difficulty.
Summary of the invention
The purpose of this invention is to provide a kind of motor, this motor can either suppress the axial dimension of motor, can determine the circumferential position of magnet again accurately, makes the back emf waveform of motor stable thus.
Illustrative the 1st aspect of the present invention is a motor.Said motor has stationary part and the above central axis that extends below is the rotating part of center rotation.Said rotating part has axle, the magnet retainer of the said central axis configuration in edge and is fixed in a plurality of magnet of the outer peripheral face of said magnet retainer.The cylindrical portion that said magnet retainer has the cap that is fixed in said axle and extends downwards from the peripheral part of said cap.Said stationary part has the said axle of coil, stator core, the support of the radial outside that is configured in said magnet to be made this rotatable bearing portion and keeps said stator core and the shell of said bearing portion.Said stator core has a plurality of teeth of the magnetic core that becomes said coil.Said bearing portion is configured in the radially inner side of said cylindrical portion; Said magnet retainer comprises the location-plate towards the outstanding a plurality of protuberances of radial outside that has than the radially inner side of said magnet, and said a plurality of magnet configuration are at the circumferential position by said a plurality of protuberance regulations.
Illustrative the 1st aspect according to the present invention can make the axial location of axial location and bearing portion of magnet overlapping.The axial dimension that therefore, can suppress motor.In addition, can circumferentially position magnet accurately through a plurality of protuberances.Therefore, can make the back emf waveform of motor stable.
Description of drawings
Fig. 1 is the sectional arrangement drawing of motor.
Fig. 2 is the sectional arrangement drawing of motor.
Fig. 3 is the vertical view of magnet retainer and rotor magnet.
Fig. 4 is the upward view of magnet retainer and rotor magnet.
Fig. 5 is the sectional arrangement drawing of magnet retainer and rotor magnet.
Fig. 6 obtains constituting the electromagnetic steel plate of stator core and the figure of the appearance of the electromagnetic steel plate that constitutes the magnet retainer for schematically representing from same electromagnetic steel plate.
Fig. 7 is the sectional arrangement drawing of motor.
Symbol description
1,1A, 1B motor
2,2A stationary part
3,3A, 3B rotating part
9,9A central axis
21,21A, 21B shell
22,22A stator core
23,23A coil
Insulating element on 24
25 times insulating elements
26,26B circuit substrate
27,27A, 27B bearing portion
The 28B encoder
31,31A, 31B axle
32,32A, 32B magnet retainer
33,33B rotor magnet
33A magnet
34 sensing magnet
41 the 1st steel plates
42 the 2nd steel plates
51 the 1st caulking parts
52 the 2nd caulking parts
53 through holes
61 constitute the electromagnetic steel plate of stator core
71 electromagnetic steel plates
The 81B rotor core
82A, 82B location-plate
321,321A, 321B cap
322,322A, 322B cylindrical portion
323 bodies
411 the 1st protuberances
412 the 1st circular holes
421 the 2nd protuberances
422 the 2nd circular holes
821A, 821B protuberance
Embodiment
Below, with reference to accompanying drawing the illustrative execution mode of the present invention is described.Below, will be called above-below direction along the direction of motor center's axis, with respect to the cap of magnet retainer, for down, the shape and the position relation of each several part is described with bearing portion side.But this only is to explain for ease and the above-below direction that defines, is not the posture when limiting motor involved in the present invention and using.
< 1. the 1st execution mode >
The sectional arrangement drawing of the motor 1A that Fig. 1 relates to for the present invention's the 1st execution mode.As shown in Figure 1, motor 1A has stationary part 2A and rotating part 3A.The central axis 9A that extends below more than the rotating part 3A is the center rotation.
Rotating part 3A has a 31A, magnet retainer 32A and a plurality of magnet 33A.Axle 31A disposes along central axis 9A.Magnet retainer 32A has cap 321A and cylindrical portion 322A.Cap 321A is fixed in a 31A.Cylindrical portion 322A extends downwards from the peripheral part of cap 321A.Magnet 33A is fixed in the outer peripheral face of magnet retainer 32A.
Stationary part 2A has shell 21A, stator core 22A, coil 23A and the 27A of bearing portion.Coil 23A is configured in the radial outside of magnet 33A.Stator core 22A has a plurality of tooth 222A of the magnetic core that becomes coil 23A.The 27A of bearing portion makes the rotatable mechanism of this 31A for being used for back shaft 31A.Shell 21A is keeping stator core 22A and the 27A of bearing portion.
As shown in Figure 1, the 27A of bearing portion is configured in the radially inner side of the cylindrical portion 322A of magnet retainer 32A.Therefore, can make the axial location of magnet 33A and the 27A of bearing portion overlapping radially.The axial dimension that can suppress thus, motor 1A.
In addition, magnet retainer 32A comprises the location-plate 82A with a plurality of protuberance 821A.Protuberance 821A is more outstanding towards radial outside than the radially inner side of magnet 33A.A plurality of magnet 33A are configured in the circumferential position by a plurality of protuberance 821A defineds.Thus, can circumferentially position a plurality of magnet 33A accurately.Its result, the back emf waveform of motor 1A becomes stable.
< 2. the 2nd execution mode >
< overall structure of 2-1. motor >
Next, the 2nd execution mode of the present invention is described.
The motor of this execution mode carries at tame electrical article such as for example air-conditioning and refrigerator etc., and the drive source that is used as fan and pump uses.But motor of the present invention also can be the motor that is used for other known application.For example, motor of the present invention can carry also that (Office Automation: office automation) equipment, Medical Devices, automobile etc. produce various actuating forces at OA.Below, the equipment that carries motor 1 is called " drive unit ".
The sectional arrangement drawing of the motor 1 that Fig. 2 relates to for this execution mode.As shown in Figure 2, motor 1 has stationary part 2 and rotating part 3.Stationary part 2 is fixed in the framework of drive unit.Rotating part 3 is rotatably supported with respect to stationary part 2.
The stationary part 2 of this execution mode has shell 21, stator core 22, coil 23, last insulating element 24, following insulating element 25, circuit substrate 26 and bearing portion 27.
Shell 21 keeps stator core 22 and bearing portion 27.Shell 21 is the metallic parts.Shell 21 has bottom 211, outside cylindrical portion 212, inside cylindrical portion 213 and circular protrusion 214.Bottom 211 be at the lower direction of coil 23 (with the direction of central axis quadrature, below same) position extension, that be substantially planar radially.That outside cylindrical portion 212 extends to the top for 211 the peripheral part from the bottom, be position roughly cylindraceous.Inside cylindrical portion 213 for the radially inner side of bottom 211 to above extend, be position roughly cylindraceous.Circular protrusion 214 be between bottom 211 and inside cylindrical portion 213 from the bottom 211 outstanding downwards positions.When drive unit is installed motor 1, circular protrusion 214 is entrenched in the framework of drive unit.Thus, can easily position motor 1 and drive unit.
The shell 21 of this execution mode forms the alloy sheets punch process that with iron is main component.That is to say that shell 21 is the single punch process article with bottom 211, outside cylindrical portion 212, inside cylindrical portion 213 and circular protrusion 214.Punch process is compared with other processing methods such as casting, cuttings, is more suitable in a large amount of productions.But shell of the present invention also can form through other processing methods.
Coil 23 constitutes by being wound on tooth 222 lead on every side.When coil 23 provides drive current, at tooth 222 generations magnetic flux radially as magnetic core.And, because the effect of the magnetic flux between the rotor magnet 33 of tooth 222 and rotating part 3 sides produces circumferential torque.Its result, with respect to stationary part 2, rotating part 3 is the center rotation with central axis 9.
Last insulating element 24 is the resin parts that makes stator core 22 and coil 23 electric insulations with following insulating element 25.Last insulating element 24 is configured in the upside of stator core 22.Following insulating element 25 is configured in the downside of stator core 22.In other words, stator core 22 in clamping between last insulating element 24 and following insulating element 25.
Last insulating element 24 and following insulating element 25 have between tooth 222 and coil 23 and make tooth 222 and the part of coil 23 electric insulations.In addition, last insulating element 24 has in circumferential ring-shaped continuous portion 241 at the radial outside of coil 23.At the upper surface of annulus 241, be provided with a plurality of steady pins 242 that are used for fixing circuit substrate 26.
Circuit substrate 26 is for carrying the substrate that is used for providing to coil 23 electronic loop of drive current.Circuit substrate 26 is fixed on the upper surface of the annulus 241 of insulating element 24.Specifically, the steady pin 242 of last insulating element 24 is inserted in the through hole that is arranged on circuit substrate 26, and the upper end of steady pin 242 is welded on the upper surface of circuit substrate 26.In addition, at the lower surface of circuit substrate 26, be provided with the Magnetic Sensor 261 of the rotating speed that is used to detect rotating part 3.Magnetic Sensor 261 can use for example Hall element.
Bearing portion 27 makes this axle 31 rotatable mechanisms for the axle 31 that is used to support rotating part 3.Bearing portion 27 remains on the inner peripheral surface of the inside cylindrical portion 213 of shell 21.Bearing portion 27 for example can use and make outer ring and the counterrotating ball bearing of inner ring through spheroid.Bearing portion 27 also can use the bearing of other modes such as sliding bearing or FDB.
The rotating part 3 of this execution mode has axle 31, magnet retainer 32, a plurality of rotor magnet 33 and sensing magnet 34.
Axle 31 is the roughly columned parts that extend to above-below direction along central axis 9.Axle 31 be that the center rotates with central axis 9 when being supported by above-mentioned bearing portion 27.The bottom of axle 31 is outstanding to the below of shell 21.In addition, the upper end of axle 31 is outstanding to the top of circuit substrate 26.The bottom of axle 31 or upper end are attached at drive unit through Poewr transmission mechanisms such as gears drive division.
A plurality of rotor magnets 33 are fixed on the outer peripheral face of the cylindrical portion 322 of magnet retainer 32.The face of the radial outside of each rotor magnet 33 becomes and stator core 22 and coil 23 opposed magnetic pole strengths.The state that a plurality of rotor magnets 33 are alternately arranged at the magnetic pole strength of the magnetic pole strength that circumferentially equally spaced is arranged in the N utmost point and the S utmost point.
Sensing magnet 34 is fixed on the upper surface of the cap 321 of magnet retainer 32.In sensing magnet 34, magnetic pole than rotor magnet 33 thinner spacing arrangement.During 1 work of this motor, the Magnetic Sensor 261 of foregoing circuit substrate 26 detects the magnetic pole of sensing magnet 34.Circuit substrate 26 acceptance critically detect the rotating speed of rotating part 3 from the detection signal of Magnetic Sensor 261, and simultaneously, control flows is to the drive current of coil 23.
< 2-2. is about the form that is provided with of bearing portion >
As stated, this motor 1 has to be has lid magnet retainer 32 roughly cylindraceous.And, bearing portion 27 be configured in this magnet retainer 32 cap 321 downside and be configured in the radially inner side of cylindrical portion 322.It is overlapped diametrically that the bearing portion 27 of this execution mode, the cylindrical portion 322 of magnet retainer 32 and rotor magnet 33 are configured to their axial location.The axial dimension that can suppress thus, motor 1.In addition, bearing portion 27 is at the height and position back shaft 31 near the center of gravity of magnet retainer 32.
Suppose at the top position and lower position two places of magnet retainer 32 bearing portion to be set, metal (upper portion is kept by different parts, then because mismachining tolerance between parts or assembly error might produce the inclination of axle 31.Relative therewith, in this execution mode, only the downside at cap 321 disposes bearing portion 27.And bearing portion 27 is used as 21 supports of shell of single part, therefore, is not easy to produce the inclination of axle 31.
In addition, in this execution mode, stator core 22 keeps with the shell 21 that bearing portion 27 is used as single part.Therefore, compared by the situation that different parts keep with bearing portion 27, can improve the axiality of stator core 22 and bearing portion 27 with stator core 22.Therefore, also can improve the axiality of stator core 22 and rotor magnet 33.
If the axiality of stator core 22 and rotor magnet 33 has improved, the back emf waveform when then motor 1 is worked will be stablized.Like this, the pulsation of yoke is suppressed, and the vibration of motor 1 and noise are lowered.
< 2-3. is about the detailed construction of magnet retainer >
Next, the structure of magnet retainer 32 is explained in more detail.Fig. 3 is the vertical view of magnet retainer 32 and a plurality of rotor magnets 33.Fig. 4 is the upward view of magnet retainer 32 and a plurality of rotor magnets 33.In addition, Fig. 5 is for from the magnet retainer 32 of the V-V position of Fig. 3 and Fig. 4 and the sectional arrangement drawing of rotor magnet 33.
The magnet retainer 32 of this execution mode by many electromagnetic steel plates vertically the laminate steel that obtains of lamination form.Electromagnetic steel plate can use for example silicon steel sheet.Many electromagnetic steel plates comprise many 1st steel plates 41 that constitute cap 321 and many 2nd steel plates 42 that constitute cylindrical portion 322.Central authorities at the 1st steel plate 41 are provided with the 1st circular hole 412.Be inserted with axle 31 at the 1st circular hole 412.Be provided with the 2nd big circular hole 422 of radius of radius ratio the 1st circular hole in the central authorities of the 2nd steel plate 42.
Suppose to utilize punch process to be manufactured with lid magnet retainer cylindraceous, then the boundary portion at cap upper surface and cylindrical portion outer peripheral face can produce bending.Relative therewith, if as this execution mode, utilize laminate steel making magnet retainer 32, can not produce bending as the punch process in the boundary portion of cap 321 upper surfaces and cylindrical portion 322 outer peripheral faces.
Therefore, in the magnet retainer 32 that forms by laminate steel, can guarantee to be used to dispose the planar portions of sensing magnet 34 more largo at the upper surface of cap 321.Therefore, can more stably dispose sensing magnet 34 at the upper surface of cap 321.Its result can lower the inclination of sensing magnet 34 with respect to central axis 9.
In addition, same, in the magnet retainer 32 that forms by laminate steel, can guarantee the contact-making surface with rotor magnet 33 more largo at the outer peripheral face of cylindrical portion 322.Therefore, can enlarge the position that becomes the back of rotor magnet 33 yoke.
In addition, if utilize laminate steel to make magnet retainer 32, then can set the radial thickness of cylindrical portion 322, the i.e. radial dimension of the 2nd steel plate 42 arbitrarily.Therefore, compare, can freely design the radial thickness of cylindrical portion 322 with the situation of utilizing punch process to make the magnet retainer.For example, with the radial thickness thickening of cylindrical portion 322, the position that enlarges the back yoke that becomes rotor magnet 33 just becomes easy.
Enlarge if become the position of the back yoke of rotor magnet 33, will lower the iron loss of motor 1.Its result, it is big that the back electromotive force the during work of motor 1 becomes, and energy efficiency improves.
Like Fig. 3 and shown in Figure 5,, be provided with to outstanding a plurality of the 1st protuberances 411 of radial outside at the peripheral part of the 1st steel plate 41.A plurality of the 1st protuberances 411 equally spaced are arranged in circumferentially.The quantity of the 1st protuberance 411 that one the 1st steel plate 41 is had is consistent with the quantity of rotor magnet 33.The end of the radial outside of the 1st protuberance 411 is positioned at than is fixed in the face of radially inner side of rotor magnet 33 of magnet retainer 32 more near the position of radial outside.
In addition,, in many 2nd steel plates 42, be disposed at the peripheral part of several the 2nd steel plates 42 of foot, be provided with to outstanding a plurality of the 2nd protuberances 421 of radial outside like Fig. 4 and shown in Figure 5.A plurality of the 2nd protuberances 421 are arranged at the lower position of a plurality of the 1st protuberances 411 respectively.Therefore, a plurality of the 2nd protuberances 421 also equally spaced are arranged in circumferentially.The quantity of the 2nd protuberance 421 that one the 2nd steel plate 42 is had is consistent with the quantity of rotor magnet 33.The end of the radial outside of the 2nd protuberance 421 is positioned at than is fixed in the face of radially inner side of rotor magnet 33 of magnet retainer 32 more near the position of radial outside.
The top of each rotor magnet 33 is disposed between circumferentially adjacent a pair of the 1st protuberance 411.In addition, the bottom of each rotor magnet 33 is disposed between circumferentially adjacent a pair of the 2nd protuberance 421.Like this, a plurality of rotor magnet 33 is configured in the circumferential position by a plurality of protuberance 411,421 defineds.That is to say that in this execution mode, the 1st steel plate 41 with the 1st protuberance 411 and the 2nd steel plate 42 with the 2nd protuberance 421 are as in the location-plate performance function that circumferentially rotor magnet 33 is positioned.In other words, many electromagnetic steel plates comprise location-plate.
When making motor 1, utilize the 1st protuberance 411 and the 2nd protuberance 421 can be easily and determine the circumferential position of each rotor magnet 33 accurately.Particularly, in the rotor magnet 33 that configuration is magnetized in advance, both can prevent that adjacent rotors magnet 33 from because magnetic force attracts each other, also can position rotor magnet 33.As long as circumferentially a plurality of rotor magnets 33 are being positioned accurately, the back emf waveform during motor 1 work will be stablized.Like this, the pulsation of torque is suppressed, and the vibration of motor 1 and noise are lowered.In addition, the centre-of gravity shift of rotating part 3 also can be suppressed.
In this execution mode, near the upper end of the outer peripheral face of magnet retainer 32, be provided with the 1st protuberance 411.In addition, near the bottom of the outer peripheral face of magnet retainer 32, be provided with the 2nd protuberance 421.The axial location of magnet retainer 32 between the 1st protuberance 411 and the 2nd protuberance 421 has the body 323 that is not provided with protuberance.Body 323 in this execution mode is made up of many 2nd steel plates 42 that do not have protuberance.
Suppose to be provided with protuberance continuously to the bottom from the upper end of the outer peripheral face of magnet retainer 32, the magnetic flux that then moves into protuberance will increase.Relative therewith, in the structure of this execution mode, between adjacent rotors magnet 33 and at the radial outside of body 323, guaranteed not have the space of protuberance.Therefore, this space becomes at a distance from magnetic magnetic barrier (flux barrier).Its result, the switching of circumferential magnetic flux becomes clearly, and the magnetism characteristic of motor 1 improves.
In addition, the outer peripheral face of body 323 is not have concavo-convex barrel surface.The sticker that therefore, can easily be used for fixing rotor magnet 33 in the outer peripheral face coating of body 323.In the coating sticker, with the nozzle of sticker outer peripheral face near body 323.Be that the center sprays sticker from nozzle to the outer peripheral face of body 323 in rotary magnet retainer 32 one side on one side with central axis 9 then.Like this, can not contact under the situation of protuberance 411,421, promptly be coated with sticker at the leading section of nozzle.
In addition, the axial location of protuberance is not limited to the example of this execution mode.For example, also can only protuberance be set in the top position of body 323 and the side in the lower position.Also have, also can protuberance be set at the axial location beyond upper end and the bottom.In this execution mode, the integral body of magnet retainer 32 is formed by laminate steel.Therefore, can protuberance be set at the electromagnetic steel plate that is configured in any axial location.In addition, protuberance also is set to the bottom from the upper end of the outer peripheral face of magnet retainer 32 serially.
When making magnet retainer 32, at first, on one side from tabular steelplate punching the 1st steel plate 41 and the 2nd steel plate 42, one side is at the mould inside of appointment each steel plate of lamination successively.Next, come many steel plates fastened to each other through the many places of riveting laminate steel vertically.Afterwards, from mould, take out the magnet retainer 32 that constitutes by laminate steel.
In addition, many 1st steel plates 41 when overlooking and the 2nd caulking part 52 position overlapped be provided with a plurality of through holes 53.The bottom of the upper end of the 2nd caulking part 52 and through hole 53 is chimeric.Thus, bottom the 1st steel plate 41 is fixed with the 2nd steel plate 42 topmost.
When magnet retainer 32 is configured in mould inside, towards the stress of radially inner side from the side action of mould in the 1st steel plate 41 and the 2nd steel plate 42.Owing to be arranged on the varying in size of circular hole of central authorities, so the deflection to radially inner side that is caused by above-mentioned stress of the 1st steel plate 41 and the 2nd steel plate 42 is different.
At this, suppose through hole 53 not to be set, to form caulking part at whole the 1st steel plate 41 and the 2nd steel plate 42 both sides at the 1st steel plate 41, under the deflection different state, the 1st steel plate 41 and the 2nd steel plate 42 are fixed.Like this, when taking out magnet retainer 32, might occur in problems such as cylindrical portion 322 retention flexs from mould.
Relative therewith, in this execution mode, be pre-formed through hole 53 at the 1st steel plate 41, then when overlooking and these through hole 53 position overlapped form the 2nd caulking part 52.That is to say that the 2nd caulking part 52 of the through hole 53 of the 1st steel plate 41 and the 2nd steel plate 42 forms separately.Therefore, can prevent that the 1st steel plate 41 and the 2nd steel plate 42 are fixed under the deflection different state.
In addition, under the situation of deflection difference in allowable range, can through hole 53 be set yet, caulking part be set the both sides of whole the 1st steel plate 41 and the 2nd steel plate 42 at the 1st steel plate 41.
The stator core 22 and the magnet retainer 32 of this execution mode are all formed by laminate steel.In addition, stator core 22 and magnet retainer 32 are when overlooking, and be not overlapping mutually.Therefore, as shown in Figure 6, can constitute the electromagnetic steel plate 61 of stator core 22 and the 1st steel plate 41 or the 2nd steel plate 42 of formation magnet retainer 32 from same electromagnetic steel plate 71 stamping-outs.
In this case, stator core 22 and magnet retainer 32 are used the electromagnetic steel plate of same material and same thickness.Like this, but efficent use of resources, the discarded amount of reduction.Its result both can suppress the manufacturing cost of motor 1, also can alleviate the load to environment.
< 3. the 3rd execution mode >
Next, about the 3rd execution mode of the present invention, be that the center describes with difference with the 2nd execution mode.Fig. 7 is the sectional arrangement drawing of the related motor 1B of the 3rd execution mode.The formation of the magnet retainer 32B of the motor 1B of Fig. 7 and have this 2 point of encoder 28B is different with the motor 1 of the 2nd execution mode.
At first, the formation to magnet retainer 32B describes.The magnet retainer 32B of Fig. 7 has rotor core 81B and location-plate 82B.Rotor core 81B has cap 321B and cylindrical portion 322B.Cap 321B is to the roughly discoideus position of radially expanding above the 27B of bearing portion.The interior perimembranous of cap 321B is fixed on the outer peripheral face of a 31B.The position roughly cylindraceous that cylindrical portion 322B extends downwards for the peripheral part from cap 321B.
The rotor core 81B of this execution mode is for through punch process with iron being the drawing article that the alloy sheets of main component forms.Therefore, compare with the situation of making rotor core through casting or cutting, can a large amount of at low cost production rotor core 81B.
Location-plate 82B is the flat parts of upper surface that are configured in the cap 321B of rotor core 81B.The interior perimembranous of location-plate 82B is fixed on the outer peripheral face of a 31B.The location-plate 82B of this execution mode by many electromagnetic steel plates of lamination vertically and the laminate steel that obtains form.Can use for example silicon steel sheet to electromagnetic steel plate.
Peripheral part at location-plate 82B is provided with to the outstanding a plurality of protuberance 821B of radial outside.A plurality of protuberance 821B equally spaced are arranged in circumferentially.The quantity of the protuberance 821B that location-plate 82B is had is consistent with the quantity of rotor magnet 33B.The end of the radial outside of protuberance 821B is positioned at than the face of the radially inner side of rotor magnet 33B more near the position of radial outside.
The top of each rotor magnet 33B is configured between the circumferentially adjacent a pair of protuberance 821B.That is to say that a plurality of rotor magnet 33B are configured in the circumferential position by a plurality of protuberance 821B defineds.When making motor 1B, utilize a plurality of protuberance 821B can be easily and determine the circumferential position of each rotor magnet 33B accurately.As long as circumferentially a plurality of rotor magnet 33B are being positioned accurately, the back emf waveform when then motor 1B works will be stablized.Like this, the pulsation of torque is suppressed, and the vibration of motor 1B and noise are lowered.
It is identical shaped with protuberance 821B to suppose to be shaped at rotor core 81B through punch process, and the operation of punch process can be complicated significantly.But, in this execution mode, disposed location-plate 82B dividually in addition with protuberance 821B with rotor core 81B.Therefore, protuberance 821B can easily be set.
In addition, rotor core 81B is different parts with location-plate 82B, can carry out various combination of multiple rotor core 81B and multiple location-plate 82B.For example, even under the situation of the shape that has changed location-plate 82B according to desired specification, rotor core 81B also needn't change shape and just can use.
In addition, location-plate 82B both can as shown in Figure 7ly be configured in the upper surface side of the cap 321B of rotor core 81B, and was also configurable below rotor core 81B.But, when location-plate 82B being configured in the upper surface side of cap 321B of rotor core 81B, more easily shell 21B and the 27B of bearing portion are configured in the below of the cap 321B of rotor core 81B.Location-plate 82B also can be arranged on the top of rotor core 81B with the upper surface of rotor core 81B across the gap.
In addition, in the example of Fig. 7, replace Magnetic Sensor 261 and sensing magnet 34, encoder 28B is set in the upper surface side of circuit substrate 26B.Encoder 28B has the test section 281B and the seized drafting board 282B that is installed on a 31B of the upper surface that is arranged on circuit substrate 26B.Be provided with a plurality of slits at seized drafting board 282B in circumferential array.Test section 281B detects the rotating speed of rotating part 3B through a plurality of slits that detect seized drafting board 282B optically.
4. variation
More than, the illustrative execution mode of the present invention is illustrated, but the present invention is not limited to above-mentioned execution mode.
The protuberance of location-plate not only has the function of decision rotor magnet position, also has the function of fixed rotor magnet.For example, protuberance is projected to more near the position of radial outside, rotor magnet is pressed into between the adjacent protuberance.Like this, can omit the sticker that is used for rotor magnet is fixed in the magnet retainer.
In addition, the 1st steel plate also can be made up of an electromagnetic steel plate.Equally, the 2nd steel plate also can be made up of an electromagnetic steel plate.In this case, just there is no need to be provided with the 1st caulking part.
In addition, shown in above-mentioned the 2nd execution mode and the 3rd execution mode, location-plate both can be from the electromagnetic steel plate stamping-out same with stator core, also can be from the electromagnetic steel plate stamping-out different with stator core.
In addition, location-plate also can not necessarily be formed by laminate steel.Location-plate both can be formed by single steel plate, also can be formed by materials such as nonmetallic resins.
In addition, shell also can be made up of the parts more than 2 or 2.For example, shell also can have the 1st case member that keeps stator core and the 2nd case member that keeps bearing portion.
In addition, each key element that in above-mentioned execution mode and variation, occurs can suitably make up in the scope that does not produce contradiction.
The present invention is capable of using in the motor of inner-rotor type.
Claims (9)
1. motor, said motor comprises:
Stationary part; And
Rotating part, it is the center rotation with the central axis that extends below on the edge;
It is characterized in that,
Said rotating part has:
Axle, it is along said central axis configuration;
The magnet retainer, the cylindrical portion that it has the cap that is fixed in said axle and extends downwards from the peripheral part of said cap; And
A plurality of magnet, they are fixed in the outer peripheral face of said magnet retainer,
Said stationary part has:
Coil, it is configured in the radial outside of said magnet;
Stator core, it has a plurality of teeth of the magnetic core that becomes said coil;
Bearing portion, it supports said axle makes this rotatable; And
Shell, it keeps said stator core and said bearing portion,
Said bearing portion is configured in the radially inner side of said cylindrical portion,
Said magnet retainer comprises location-plate, this location-plate have than the radially inner side of said magnet towards the outstanding a plurality of protuberances of radial outside,
Said a plurality of magnet configuration is at the circumferential position by said a plurality of protuberance regulations.
2. motor as claimed in claim 1, wherein,
Said magnet retainer is formed by the laminate steel that many electromagnetic steel plates of lamination vertically obtain,
Said many electromagnetic steel plates comprise said location-plate.
3. motor as claimed in claim 2, wherein,
Said magnet retainer has the caulking part that said many electromagnetic steel plates are formed in axial deformation,
Said caulking part is arranged on the circumferential position identical with said protuberance.
4. motor as claimed in claim 2, wherein,
Said many electromagnetic steel plates have:
One or more 1st steel plates, said the 1st steel plate has the 1st circular hole in central authorities, and constitutes said cap; And
One or more 2nd steel plates, said the 2nd steel plate has 2nd circular hole bigger than said the 1st circular hole in central authorities, and constitutes said cylindrical portion,
Said cylindrical portion has the caulking part that said one or more 2nd steel plates are formed in axial deformation,
Said one or more 1st steel plates have and are arranged on when overlooking and the through hole of said caulking part position overlapped.
5. motor as claimed in claim 1, wherein,
Said magnet retainer has:
Rotor core, it has said cap and said cylindrical portion; And
Said location-plate, it is different parts with said rotor core.
6. motor as claimed in claim 5, wherein,
Said rotor core is the drawing article.
7. like claim 5 or the described motor of claim 6, wherein,
Said location-plate is configured in the upper surface side of said cap.
8. like each the described motor in claim 1 to the claim 6, wherein,
Said magnet retainer has the body that said protuberance is not set,
Said protuberance is configured in the top position of said body and at least one side in the lower position.
9. like each described motor in claim 1 to the claim 6, wherein,
Said stator core is formed by the laminate steel that the electromagnetic steel plate of lamination and said location-plate same material and same thickness vertically obtains.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011083250A JP5741826B2 (en) | 2011-04-05 | 2011-04-05 | motor |
| JP2011-083250 | 2011-04-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102738935A true CN102738935A (en) | 2012-10-17 |
| CN102738935B CN102738935B (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210088803.8A Expired - Fee Related CN102738935B (en) | 2011-04-05 | 2012-03-29 | Motor |
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| Country | Link |
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| JP (1) | JP5741826B2 (en) |
| CN (1) | CN102738935B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026433A (en) * | 2015-03-31 | 2016-10-12 | 日本电产株式会社 | Motor |
| CN107276273A (en) * | 2016-03-31 | 2017-10-20 | 日本电产株式会社 | The manufacture method of motor and motor |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014099971A (en) | 2012-11-13 | 2014-05-29 | Nippon Densan Corp | Motor |
| JP6238054B2 (en) | 2013-09-26 | 2017-11-29 | 日本電産株式会社 | Inner rotor type motor |
| JP6349719B2 (en) | 2013-12-20 | 2018-07-04 | 日本電産株式会社 | Inner rotor type motor |
| JP2016010294A (en) * | 2014-06-26 | 2016-01-18 | 日本電産株式会社 | Motor |
| JP2018048596A (en) * | 2016-09-21 | 2018-03-29 | 日立オートモティブシステムズ株式会社 | Actuator for linkage mechanism for internal combustion engine |
| DE102018124225A1 (en) * | 2018-04-10 | 2019-10-10 | Schaeffler Technologies AG & Co. KG | Pump actuator for a clutch and corresponding clutch |
| WO2019197856A1 (en) * | 2018-04-12 | 2019-10-17 | 日産自動車株式会社 | Rotating electric machine |
| CN109660099B (en) * | 2018-12-10 | 2024-07-12 | 陕西法士特齿轮有限责任公司 | Mixed excitation synchronous motor |
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| JPH05260686A (en) * | 1992-03-16 | 1993-10-08 | Toshiba Corp | Permanent magnet rotor |
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| JP2006204012A (en) * | 2005-01-20 | 2006-08-03 | Nidec Tosok Corp | Rotor structure of torque motor |
| JP5257821B2 (en) * | 2005-08-24 | 2013-08-07 | 日本電産株式会社 | motor |
| JP2007318831A (en) * | 2006-05-23 | 2007-12-06 | Honda Motor Co Ltd | Rotary electric machine |
| JP2009095139A (en) * | 2007-10-09 | 2009-04-30 | Nippon Densan Corp | Electric motor |
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| JPH04165932A (en) * | 1990-10-29 | 1992-06-11 | Toshiba Corp | Permanent magnet type rotor |
| JPH05260686A (en) * | 1992-03-16 | 1993-10-08 | Toshiba Corp | Permanent magnet rotor |
| JP3779097B2 (en) * | 1999-07-23 | 2006-05-24 | 日本電産サンキョー株式会社 | Electric motor rotor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106026433A (en) * | 2015-03-31 | 2016-10-12 | 日本电产株式会社 | Motor |
| CN106026433B (en) * | 2015-03-31 | 2019-10-08 | 日本电产株式会社 | Motor |
| CN107276273A (en) * | 2016-03-31 | 2017-10-20 | 日本电产株式会社 | The manufacture method of motor and motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5741826B2 (en) | 2015-07-01 |
| JP2012222867A (en) | 2012-11-12 |
| CN102738935B (en) | 2015-04-08 |
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