CN109889005A - The motor of outer-rotor type - Google Patents
The motor of outer-rotor type Download PDFInfo
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- CN109889005A CN109889005A CN201811477955.0A CN201811477955A CN109889005A CN 109889005 A CN109889005 A CN 109889005A CN 201811477955 A CN201811477955 A CN 201811477955A CN 109889005 A CN109889005 A CN 109889005A
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Abstract
There is provided a kind of motor of outer-rotor type, wherein the excitation division of rotor is annularly configured centered on central axis, and stator arrangement is in the radially inner side of the excitation division of rotor.In the rotor, cylindrical portion is opposed with stator, and the ferro-gum of tubular is configured at the radial outside of the outer peripheral surface of cylindrical portion and along the outer peripheral surface.
Description
Technical field
The present invention relates to the motors of outer-rotor type.
Background technique
The motor of outer-rotor type has stator and rotor.Stator arrangement is in the radially inner side of the excitation division of rotor.Stator produces
Raw armature field.Rotor generates excitation field.Generated excitation field interlinks with generated armature field.It generates as a result,
The torque for rotating rotor about central axis.
Rotor has rotor retainer and magnet.Magnet generates excitation field.
The magnet for being assembled in rotor is roughly divided into sintered magnet, plastic magnet and ferro-gum.
In the case where being assembled in the magnet of rotor is sintered magnet or plastic magnet, it is not easy to create the problem that
Magnet is made towards stator deformability or movement, thus magnet due to magnetic interaction between heat, external force, stator and magnet etc.
It is contacted with the tooth of stator etc..But in the case where being assembled in the magnet of rotor is sintered magnet or plastic magnet, magnet is not
Cheaply, the keeping, processing and the assembling to rotor of magnet are not easy to.
On the other hand, in the case where being assembled in the magnet of rotor is ferro-gum, it is easy to produce the above problem.Especially
It is that, in the case where ferro-gum is neodymium (Nd) ferro-gum, the above problem is easy to become obvious.But it is being assembled in rotor
Magnet be ferro-gum in the case where, magnet it is cheap, the keeping of magnet, processing and the assembling to rotor become to hold
Easily.
For example, the motor recorded in Japanese Kokai special open 2016-119789 bulletin is the motor of outer-rotor type
Example.In the motor documented by the bulletin, rotor magnet is configured on the inner peripheral surface of the rotor yoke of cup-shaped.In the bulletin
In documented motor, rotor magnet is ferro-gum.
As described above, when the magnet assembled in the rotor for the motor for being set to outer-rotor type is sintered magnet or plastics
In the case where magnet, magnet is not cheap, and keeping, processing and the assembling to rotor of magnet are not easy.On the other hand, when setting
In the case where being placed in the magnet assembled in the rotor of the motor of outer-rotor type and being ferro-gum, under high temperature environment, it is easy to produce
The problem of magnet and stator contact.
Therefore, in existing technology, it is difficult to obtain using cheap ferro-gum and does not allow to be also easy to produce magnet
With the motor of outer-rotor type the problem of stator contact.
Summary of the invention
In embodiment illustrated of the invention, it is capable of providing cheap and does not allow to be also easy to produce magnet and connect with stator
The motor of the outer-rotor type of the problem of touching.
In embodiment illustrated of the invention, in the motor of outer-rotor type, the excitation division of rotor is set in
It is annularly configured centered on mandrel line, stator arrangement is in the radially inner side of rotor.In the rotor, cylindrical portion is opposed with stator, cylinder
The ferro-gum of shape is configured at the radial outside of the outer peripheral surface of cylindrical portion and along the outer peripheral surface.
In said motor, the ferro-gum of tubular has towards the 1st multipole magnetized face of radially inner side and direction and diameter
The 2nd multipole magnetized face in different directions inwardly.Said motor also has Magnetic Sensor.Magnetic Sensor and the 2nd multipole magnetized
Face is opposed, the magnetic field that detection is generated by the 2nd multipole magnetized face.
In said motor, the 2nd multipole magnetized face is axially extending from cylindrical portion and towards axial direction.
In said motor, the ferro-gum of tubular is isotropic magnet.
In said motor, the ferro-gum of tubular has the multiple magnetized portions for being geomagnetic into Halbach array.Rubber
Magnet has magnet inner peripheral surface and magnet outer peripheral surface.The magnetic generated by magnet outer peripheral surface is better than by the magnetic field that magnet inner peripheral surface generates
?.
In said motor, the outer diameter of excitation division is greater than the axial dimension of excitation division.
In said motor, cylindrical portion is made of non-magnetic material.
In said motor, said motor also has the barrel-shaped structure portion for the ferro-gum for surrounding tubular.
Embodiment illustrated according to the present invention assembles and cheap by easy keeping, processing and to rotor
Ferro-gum be assembled in rotor.
Thereby, it is possible to provide the motor of cheap outer-rotor type.
Embodiment illustrated according to the present invention, in the radially inner side of ferro-gum, there are cylindrical portions.
Limited using cylindrical portion as a result, due to magnetic interaction between heat, external force, stator and ferro-gum etc. and
Cause ferro-gum towards stator deformability or movement, so as to prevent ferro-gum and stator contact.
The present invention can be more clearly understood that referring to attached drawing by the detailed description of the preferred embodiment for the present invention below
Above-mentioned and other feature, element, step, features and advantages.
Detailed description of the invention
Fig. 1 is the cross-sectional view schematically illustrated to the motor of the 1st embodiment.
Fig. 2 is schematically to carry out figure to the rotor, Magnetic Sensor and the substrate that are arranged in the motor of the 1st embodiment
The cross-sectional view shown.
Fig. 3 is the cross-sectional view schematically illustrated to the ferro-gum being arranged in the motor of the 1st embodiment.
Specific embodiment
It is illustrated hereinafter, Duiing embodiment illustrated of the invention while referring to attached drawing.In addition, in the application
In, the direction parallel with the central axis C of motor is known as " axial direction ", the direction of the central axis upright with motor is known as
" radial direction " will be known as " circumferential direction " along the direction of the circular arc centered on the central axis C of motor.In addition, in this application, it will
It is axial that the shape and positional relationship of each section are illustrated as up and down direction.But, it is not intended to pass through the upper and lower
To definition manufacture and use to limit motor of the invention when direction.
In the present specification, " parallel direction " also includes substantially parallel direction.In addition, in the present specification, it is " vertical
Direction " also include generally perpendicular direction.
1 the 1st embodiment
The outline of 1.1 motors
Fig. 1 is the cross-sectional view schematically illustrated to the motor of the 1st embodiment.
The motor 1000 illustrated in Fig. 1 is outer rotor motor, has stator 1020, rotor 1021, shell 1022, bearing
1023 and bearing 1024.Motor 1000 also can have the works other than these works.
Shell 1022 is the component of the tubular axially extended.The material of shell 1022 is not particularly limited, preferably for
Such as aluminium (including aluminium alloy) or SUS ferroalloy etc..Stator 1020 is fixed on shell 1022 such as and by being pressed into or being bonded
Outer peripheral surface.
Inside on the downside of the axial direction of shell 1022 maintains bearing 1024.Bearing 1024 indentation such as by fixing
In the medial surface of shell 1022.Bearing 1023 is fixed on the inner peripheral surface of aftermentioned stator core.In the present embodiment, axis
Holding 1023,1024 is ball bearing.In addition, the type of bearing 1023,1024 is not limited to ball bearing, be also possible to sliding bearing etc. its
The bearing of his type.
Rotor 1021 can be rotated by the bearing of bearing 1023,1024 relative to shell 1022.
In motor driving, stator 1020 becomes armature and generates armature field.Rotor 1021 becomes excitation and generates and encourage
Magnetic magnetic field.Generated excitation field interlinks with generated armature field.Producing as a result, makes rotor 1021 around central axis
The torque of C rotation.
Motor 1000 is outer rotor motor.Therefore, in motor 1000, stator 1020 is configured at the excitation of rotor 1021
The radially inner side in portion 1040.The excitation division 1040 of rotor 1021 is annularly configured centered on central axis C.
1.2 stator
Like that, stator 1020 has stator core 1060 and multiple windings 1061 to diagram as shown in figure 1.Stator core 1060 has
Cored back 1080 and multiple teeth 1081.
In the present embodiment, core-back 1080 is annular in shape, is annularly configured centered on central axis C.Each tooth
1081 is prominent from the outer peripheral surface 1110 of core-back 1080 towards radial outside.Each tooth 1081 is centered on central axis C along week
It is configured to interval.In the present embodiment, tooth 1081 is circumferentially, equally spaced configured at the periphery of core-back 1080
Face.Insulating part is installed on each tooth 1081.The material of insulating part is the insulating materials such as the resin of insulating properties.On each tooth 1081
Winding 1061 is installed across insulating part.Winding 1061 is, for example, to be made up of coiled electrical conductor.
Stator core 1060 is made of magnetic substance.In the present embodiment, stator core 1060 is by muti-piece electromagnetic steel plate
The stacked steel plate made of axially stacked.When to multiple 1061 galvanizations of winding, armature field corresponding with electric current is generated.Separately
Outside, stator core 1060 is also possible to compressed-core etc. to replace stacked steel plate.
The inner peripheral surface of core-back 1080 has small diameter portion and large-diameter portion.Large-diameter portion is located at the axial upside of small diameter portion.Greatly
The internal diameter in diameter portion is greater than the internal diameter of small diameter portion.Inside diameter is fixed on the outer peripheral surface of shell 1020.Axis is maintained in large-diameter portion
Hold 1023.Bearing 1023 and the axis of shell 1020 opening to the upper side are opposed in the axial direction.
Stator 1020 with the illustrated construction of Fig. 1 can also be replaced into and be determined with the construction different from the construction
Son.Above-mentioned stator core 1060 is the not divided cricoid circular iron core of core-back.But stator core 1060 is unlimited
In circular iron core, any iron being also possible in the vertical bar iron core that so-called segmentation iron core is connected with a part of only core-back
Core is also possible to the iron core of other shapes.The winding method of multiple windings 1061 can be in concentration winding and scatter winds
Any means are also possible to other winding method.
1.3 rotor
Fig. 2 is schematically to illustrate to the rotor, Magnetic Sensor and the substrate that are arranged in the motor of the 1st embodiment
Cross-sectional view.Fig. 2 is the figure for being exaggerated a part of Fig. 1.
As illustrated in Fig. 1 and Fig. 2, rotor 1021 have axis 1100, rotor retainer 1101, ferro-gum 1102 with
And cylindrical portion 1103.
As illustrated in fig. 1, axis 1100 is in conjunction with the inner ring of bearing 1023,1024.The inner ring energy of bearing 1023,1024
Enough it is respectively relative to the outer ring rotation of bearing 1023 and 1024.The outer ring of bearing 1024 is combined with shell 1022.Bearing 1023
Outer ring is fixed on the inner peripheral surface of core-back.In the present embodiment, the big of core-back is fixed in the outer ring of bearing 1023
Diameter portion.Axis 1100 can rotate in the state of along central axis C around central axis C as a result,.
Rotor retainer 1101 is combined with axis 1100.Ferro-gum 1102 is installed on rotor retainer 1101.Rubber as a result,
Magnet 1102 can integrally be rotated with axis 1100.
In the present embodiment, ferro-gum 1102 is cylindrical in shape, and is configured to tubular centered on central axis C.Rubber
The magnet inner peripheral surface 1120 of magnet 1102 is magnetized out multipole and becomes multipole magnetized face.Magnet inner peripheral surface 1120 generates as a result,
Excitation field.
1.4 rotor retainers
Rotor retainer 1101 is that have lid cylindrical body.As illustrated in Figure 2 like that, rotor retainer 1101 has barrel-shaped structure
Portion 1140 and platy structure portion 1141.Barrel-shaped structure portion 1140 is the component of tubular, is axially extended.
Platy structure portion 1141 is the position of cover shape.Platy structure portion 1141 covers opening for the upside in barrel-shaped structure portion 1140
At least part of mouth.From the end of the radial outside in platy structure portion 1141, downside extends in the axial direction in barrel-shaped structure portion 1140.
The plate end 1160 of the peripheral side in platy structure portion 1141 is connected with the cylinder end 1180 of the upside in barrel-shaped structure portion 1140.At this
In embodiment, formations 1141 and barrel-shaped structure portion 1140 are integrally formed by punch process or machining etc..It changes
Yan Zhi, rotor retainer are single components.Therefore, plate end 1160 and cylinder end 1180 are integrated.But formations 1141
Also it could be separately formed and combine with barrel-shaped structure portion 1140.
Ferro-gum 1102 and barrel-shaped structure portion 1140 constitute excitation division 1040.Inner peripheral surface in barrel-shaped structure portion 1140
Ferro-gum 1102 is installed on 1200.Ferro-gum 1102 is surrounded by barrel-shaped structure portion 1140 as a result,.Ferro-gum 1102
The barrel-shaped structure portion other than the barrel-shaped structure portion 1140 of a part of rotor retainer 1101 can be formed to surround.For example,
In the case that groups of motors is loaded on pressure fan, ferro-gum 1102 can also be arranged at the barrel-shaped structure of the composition impeller of pressure fan
Portion surrounds.
In the present embodiment, the material of rotor retainer 1101 is magnetic material.In addition, constituting rotor retainer 1101
Multiple formations can also be made of mutually different material.For example, it can be barrel-shaped structure portion 1140 is metal equimagnetic
Property material, platy structure portion 1141 is the non-magnetic materials such as resin.
The advantages of 1.5 ferro-gum
The illustrated tubular of Fig. 1 and Fig. 2 can be readily available and flat ferro-gum is deformed into tubular
Ferro-gum 1102.In addition, not needing particular manufacturing craft when flat ferro-gum is deformed into tubular.Moreover, comparing
In the magnet of such as three-dimensional shape, flat ferro-gum does not need the wide space etc. for keeping, can be easily
It is taken care of.Therefore, in the case where being assembled in the magnet of rotor 1021 is ferro-gum 1102, the keeping of magnet, processing with
And it is easy to the assembling of rotor 1021.In addition, in ferro-gum 1102, binding material that magnetic powder is bonded to one another
It is cheap.Therefore, in the case where being assembled in the magnet of rotor 1021 is ferro-gum 1102, magnet becomes cheap.Therefore,
In the case where being assembled in the magnet of rotor 1021 is ferro-gum 1102, it is capable of providing cheap motor 1000.
In motor driving, the electromagnetic force of radial direction is generated between tooth and magnet.Be likely due to the electromagnetic force and
Tooth and magnet is set to generate vibration, to generate noise from motor.
Especially, in the case where being assembled in the magnet of rotor 1021 is plastic magnet or sintered magnet, the noise is not
It is easy decaying.
In addition, in the case where being assembled in the magnet of rotor 1021 is plastic magnet or sintered magnet, it is also possible to generate
Following problem: resonance noise changes according to the amount for the bonding agent that magnet is adhered to rotor subject.
In contrast, in the present embodiment, ferro-gum 1102 has elasticity.The feelings rotated as a result, in rotor 1021
Under condition, because generated between each tooth 1081 and ferro-gum 1102 radial electromagnetic force caused by vibration declined by ferro-gum 1102
Subtract.As a result, it is suppressed that the noise generated from motor 1000.
1.6 prevent ferro-gum and stator contact
In the case where being assembled in the magnet of the illustrated rotor 1021 of Fig. 1 and Fig. 2 is ferro-gum 1102, it is possible to by
Magnetic interaction between heat, external force, stator 1020 and ferro-gum 1102 etc. and cause ferro-gum 1102 to stator
1020 deformations are mobile.Therefore, it is desirable to these deformations or mobile be limited, to prevent ferro-gum 1102 and stator 1020
Contact.Hereinafter, the structure to the use is illustrated.
Rotor 1021 also has cylindrical portion 1103.In the present embodiment, cylindrical portion 1103 is aluminium (comprising aluminium alloy) etc.
Non-magnetic material.
Cylindrical portion 1103 constitutes excitation division 1040.Even if cylindrical portion 1103 will not in the case where rotor 1021 rotates
It is deformed to the degree contacted with stator 1020.Cylindrical portion 1103 is cylindrical in shape, and is axially extended centered on central axis C.Tubular
Portion 1103 is opposed radially with stator 1020.
Ferro-gum 1102 is configured at the radial outside of the outer peripheral surface 1220 of cylindrical portion 1103.Ferro-gum 1102 is along outer
Circumferential surface 1220.
Cylindrical portion 1103 is configured in the radially inner side of ferro-gum 1102.Therefore, it is limited using cylindrical portion 1103
Ferro-gum 1102 is deformed to stator 1020 or movement.As a result, can prevent ferro-gum 1102 from connecing with stator 1020
Touching.
In addition, in the present embodiment, cylindrical portion 1103 as so-called yoke without functioning.Therefore, institute as above
It states, cylindrical portion 1103 is non-magnetic material.
The detection of the circumferential position of 1.7 rotors
The ferro-gum 1102 of tubular has different from radially inner side towards the 1st multipole magnetized face of radially inner side and direction
Direction the 2nd multipole magnetized face.The motor of outer-rotor type also has Magnetic Sensor 1260.Magnetic Sensor 1260 and the 2nd multipole
Magnetizing surface is opposed.The magnetic field that the detection of Magnetic Sensor 126 is generated by the 2nd multipole magnetized face.
The magnet inner peripheral surface 1120 of the illustrated ferro-gum 1102 of Fig. 2 is directed towards radially inner side and generates excitation field
The 1st multipole magnetized face.
In motor 1000, the end face 1240 of the downside of ferro-gum 1102 is the 2nd multipole magnetized towards axial downside
Face.2nd multipole magnetized face for example generates the magnetic field of the circumferential position for detecting rotor 1021.
Motor 1000 has substrate 1261 and at least one Magnetic Sensor 1260.In the present embodiment, substrate 1261
The component of plate in this way.Substrate 1261 is supported by a part of shell 1002.In the present embodiment, substrate 1261 and stator and
Rotor is opposed in the axial direction.Electricity is electrically connected on the face of at least one party in the axial side and the axial other side of substrate 1261
The various electronic components such as container.Substrate 1261 is connect via connector etc. with external power supply (illustration omitted).In addition, substrate
1261 connect with winding indirectly such as directly or via conductive component conducting wire.Thereby, it is possible to via external power supply to
Motor (that is, stator) provides electric power.
In addition, in the present embodiment, substrate 1261 is so-called printed base plate (PCB).But substrate 1261 is not limited to
Printed base plate (PCB) is also possible to FPC (Flexible printed circuits: flexible print circuit) etc..
In addition, the number of substrate 1261 is not limited to one, it is also possible to two or more.Substrate 1321 can be single side installation
There is the single substrate of electronic component etc., is also possible to the two-sided double-sided substrate for being equipped with electronic component etc..
Magnetic Sensor 1260 is the position sensor for detecting the circumferential position of rotor 1021.In the present embodiment, magnetic passes
Sensor 1260 is installed on substrate 1261.The specific position of Magnetic Sensor 1260 in the circumferential and the downside of ferro-gum 1102
End face 1240 is opposed.
Magnetic Sensor 1260 is able to detect the magnetic field generated by end face 1240, and the magnetic field for exporting and detecting as a result,
Corresponding electric signal.The circumferential position of rotor 1021 can be detected or inferred according to the electric signal exported.
Magnetic Sensor 1260 can be any element in Hall element, Hall IC and magnetoresistive element, be also possible to it
His element.Magnetic Sensor 1260 also can detecte other than detecting the magnetic field generated by end face 1240 by ferro-gum
The magnetic field of the equal generations of 1102 magnet outer peripheral surface 1121.The quantity of Magnetic Sensor 1260 can be one, be also possible to three with
On, it can be suitably changed according to quantity of the quantity of the magnetic pole of rotor or phase etc..
In the case where magnet, which is, has stronger anisotropic sintered magnet, preferably setting and generation excitation field
The independent sensor-magnet of sintered magnet and the Magnetic Sensor in magnetic field that is generated by sensor-magnet of detection.Therefore, it senses
The cost and installation work-hour of device magnet etc. increase.
In contrast, in the present embodiment, preferably, ferro-gum 1102 is isotropic magnet or anisotropy
Magnet.Anisotropic magnet has also can be magnetized weaker each on the direction different from the direction that easy magnetizing axis is extended
Anisotropy.More preferably, ferro-gum 1102 is isotropic magnet.
It is isotropic magnet or feelings with weaker anisotropic anisotropic magnet in ferro-gum 1102
It, will be towards the magnet inner peripheral surface 1120 of the ferro-gum 1102 of radially inner side and towards the axial direction different from radially inner side under condition
1240 both sides of the end face magnetization of the downside of the ferro-gum 1102 of downside is easy to.
As a result, without being arranged and the independent sensor magnetic of ferro-gum 1102 to detect the circumferential position of rotor 1021
The Magnetic Sensor in the magnetic field that iron and detection are generated by sensor-magnet.As a result, can reduce the manufacture of motor 1000 at
This.
As illustrated in Figure 2 like that, from cylindrical portion 1103, downside is stretched in the axial direction for the end face 1240 of the downside of ferro-gum 1102
Out.The configuration of Magnetic Sensor 1260 is easy near end face 1240 as a result, it can be using Magnetic Sensor 1260 come efficiently
Detect the magnetic field generated by end face 1240.
Alternatively, it is also possible to as so following.The end face 1241 of the upside of ferro-gum 1102 is towards axial upside.End face
1241 from cylindrical portion 1103 in the axial direction upside stretch out.Magnetic Sensor 1260 is opposed with end face 1241.End face 1241 is to generate as a result,
For detecting the multipole magnetized face in the magnetic field of the circumferential position of rotor 1021.In other words, Magnetic Sensor 1260 is able to detect from end
The magnetic flux that face 1241 generates.
The installation of 1.8 ferro-gums
The illustrated ferro-gum 1102 of Fig. 2 is mounted on the inner circumferential in barrel-shaped structure portion 1140 by arbitrary installation method
On face 1200.For example, ferro-gum 1102 is by being tightly pressed into it in barrel-shaped structure portion 1140 and being pasted onto inner peripheral surface
Inner peripheral surface 1200 is installed on 1200.It, can be by the case where than installation sintered magnet according to such installation method
Installation procedure simple installation procedure ferro-gum 1102 is installed.In addition, ferro-gum 1102 can also pass through bonding etc.
Other methods and the inner peripheral surface 1200 for being installed on barrel-shaped structure portion 1140.
The type of 1.9 magnet
The illustrated ferro-gum 1102 of Fig. 1 and Fig. 2 can be the iron oxygen by constituting comprising the composition including ferrite
Any ferro-gum in body rubber magnet and the Nd ferro-gum by constituting comprising the composition including neodymium (Nd), is also possible to
Other ferro-gums, but preferably Nd ferro-gum.
Nd ferro-gum has the magnetic force same with higher volume of ferrite rubber magnet is accounted for.Therefore, same when to generate
Deng magnetic force when, the case where compared to ferrite rubber magnet is used, in the case where ferro-gum 1102 is Nd ferro-gum,
The volume of magnet can be reduced to reduce the volume of rotor.As a result, motor 1000 can be made to minimize.
The price of Nd ferro-gum, which is lower than, includes the Nd plastic magnet and Nd sintered magnet including Nd.Therefore, it is being assembled in
In the case that the magnet of rotor 1021 is Nd ferro-gum, it is capable of providing cheap motor 1000.The valence of Nd plastic magnet
It is because being needed in the case where Nd plastic magnet using epoxides, polyamide (PA), polyphenylene sulfide that lattice, which are higher than Nd ferro-gum,
Ether (PPS) etc. is used as adhesive.It is the Nd content because in Nd sintered magnet that the price of Nd sintered magnet, which is higher than Nd ferro-gum,
Higher than the Nd content in Nd ferro-gum.
In common Nd ferro-gum, the magnetic powder being made of the magnetic material of NeFeB system by nitrile rubber each other
It is bonded together.But nitrile rubber is inadequate for magnetic force possessed by the magnetic powder to the power that the magnetic powder is fixed
Sufficiently.Therefore, common Nd ferro-gum is merely being assembled into the rotor being arranged in the motor of existing outer-rotor type
In the case where, it is possible to produce the problem because caused by the power is insufficient.
For example, in the outer-rotor type with stator and the rotor for the Nd ferro-gum for being assembled with ten magnetic poles that are magnetized out
Motor be assembled and in the case where placing, it is possible to produce following problem: the magnetic powder is pulled to stator core to Nd
Ferro-gum contacts at ten with stator core.
But in motor 1000, ferro-gum 1102 is configured to the radial outside of cylindrical portion 1103, so as to anti-
Only the problem generates.
1.10 Halbach (Halbach) array
Fig. 3 is the cross-sectional view schematically illustrated to the ferro-gum for the motor for being set to the 1st embodiment.
The illustrated ferro-gum 1102 of Fig. 3 is magnetized out eight magnetic poles.In addition, the number of magnetic poles in ferro-gum 1102
It can be the number of magnetic poles except eight magnetic poles.
Ferro-gum 1102 is preferably isotropic magnet.In the present embodiment, ferro-gum 1102 is geomagnetic into sea
That Bake array.As illustrated in fig. 3, ferro-gum 1102 has the multiple magnetized portions for being geomagnetic into Halbach array
1400.The ferro-gum 1102 of tubular has magnet inner peripheral surface 1120 and magnet outer peripheral surface 1121.
Flux concentrating is in the magnet inner peripheral surface 1120 of ferro-gum 1102 as a result, by the magnet inner circumferential of ferro-gum 1102
The magnetic field that face 1120 generates is better than the magnetic field generated by the magnet outer peripheral surface 1121 of ferro-gum 1102.By magnet inner peripheral surface 1120
The magnetic field of generation is enhanced because being geomagnetic into Halbach array, this facilitates in volume, the shape for maintaining ferro-gum 1102
Increase torque caused by motor 1000 in the case that shape and material are constant.
Multiple magnetized portions 1400 circumferentially arrange.Multiple magnetized portions 1400 include the diametrical magnetization portion radially magnetized out
1420 and circumferentially magnetize circumferential magnetization portion 1421 out.In multiple magnetized portions 1400, diametrical magnetization portion 1420 and circumferential magnetic
Change portion 1421 arranges circumferentially alternatingly.
Multiple diametrical magnetization portions 1420 include the 1st diametrical magnetization portion 1440 and the 2nd diametrical magnetization portion 1441.It is radial the 1st
In magnetized portion 1440, the pole S is exposed on the magnet inner peripheral surface 1120 of ferro-gum 1102.In the 2nd diametrical magnetization portion 1441, N
Expose on the magnet inner peripheral surface 1120 of ferro-gum 1102 pole.
In multiple diametrical magnetization portions 1420, the 1st diametrical magnetization portion 1440 and the 2nd diametrical magnetization portion 1441 are alternately arranged
Column.In the two circumferential magnetization portions 1421 adjacent with the 1st diametrical magnetization portion 1440, the direction from the pole S towards the pole N is separate is somebody's turn to do
The direction in the 1st diametrical magnetization portion 1440.In the two circumferential magnetization portions 1421 adjacent with the 2nd diametrical magnetization portion 1441, from the pole S
Direction towards the pole N is the direction close to the 2nd diametrical magnetization portion 1441.
As described above, ferro-gum 1102 is cylindrical in shape configuration centered on central axis C.But ferro-gum 1102
The multiple ferro-gums circumferentially arranged centered on central axis C can be replaced into.Multiple ferro-gums respectively with rubber magnet
Multiple magnetized portions 1400 possessed by iron 1102 are similarly magnetized.
The shape and purposes of 1.11 motors
In the case where being assembled in the magnet of rotor 1021 is ferro-gum 1102, it is capable of increasing caused by motor 1000
The axial dimension of excitation division 1040 of the torque without will increase rotor 1021.
Therefore, it in the case where being assembled in the magnet of rotor 1021 is ferro-gum 1102, has been readily available as follows
Motor 1000: small-sized, the outer diameter with excitation division 1040Greater than the flat shape of the axial dimension of excitation division 1040, generate
Higher torque.The outer diameter of achievable excitation division 1040For example, 85mm or so, it can be achieved that excitation division 1040 axial ruler
It is very little for instance in 3mm to 7mm in the range of.
The present invention is used not only for power sliding, also can be widely applied for dust catcher, drying machine, ceiling fan, washing machine, ice
Case and electric power steering apparatus etc. have the plurality of devices of various motors.
It describes the invention in detail, but above-mentioned explanation is the illustration of various aspects, the invention is not limited thereto.It should
It is interpreted as, can be envisaged that the infinite variety example not illustrated without departing from the scope of the present invention.
Claims (8)
1. a kind of motor of outer-rotor type, includes
Rotor has the excitation division annularly configured centered on central axis；And
Stator is configured at the radially inner side of the excitation division,
The motor is characterized in that,
The rotor includes
Cylindrical portion, it is opposed with the stator, there is outer peripheral surface；And
The ferro-gum of tubular is configured at the radial outside of the outer peripheral surface and along the outer peripheral surface.
2. the motor of outer-rotor type according to claim 1, which is characterized in that
The ferro-gum of the tubular includes
1st multipole magnetized face, towards radially inner side；And
2nd multipole magnetized face, the direction direction different from radially inner side,
The motor of the outer-rotor type also has Magnetic Sensor, and the Magnetic Sensor is opposed with the 2nd multipole magnetized face, detection by
The magnetic field that the 2nd multipole magnetized face generates.
3. the motor of outer-rotor type according to claim 2, which is characterized in that
The 2nd multipole magnetized face is axially extending from the cylindrical portion and towards axial direction.
4. the motor of outer-rotor type according to claim 2 or 3, which is characterized in that
The ferro-gum of the tubular is isotropic magnet.
5. according to claim 1 to the motor of outer-rotor type described in any one in 3, which is characterized in that
The ferro-gum of the tubular has the multiple magnetized portions for being geomagnetic into Halbach array, and has magnet inner peripheral surface
With magnet outer peripheral surface,
The magnetic field generated by the magnet outer peripheral surface is better than by the magnetic field that the magnet inner peripheral surface generates.
6. according to claim 1 to the motor of outer-rotor type described in any one in 3, which is characterized in that
The outer diameter of the excitation division is greater than the axial dimension of the excitation division.
7. according to claim 1 to the motor of outer-rotor type described in any one in 3, which is characterized in that
The cylindrical portion is made of non-magnetic material.
8. according to claim 1 to the motor of outer-rotor type described in any one in 3, which is characterized in that
The motor of the outer-rotor type also has the barrel-shaped structure portion for the ferro-gum for surrounding the tubular.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017234109A JP2019103322A (en) | 2017-12-06 | 2017-12-06 | Outer rotor type motor |
| JP2017-234109 | 2017-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109889005A true CN109889005A (en) | 2019-06-14 |
Family
ID=66924957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811477955.0A Withdrawn CN109889005A (en) | 2017-12-06 | 2018-12-05 | The motor of outer-rotor type |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2019103322A (en) |
| CN (1) | CN109889005A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688451A (en) * | 2019-10-17 | 2021-04-20 | 丰田自动车株式会社 | Rotor and method for manufacturing rotor |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020158841A1 (en) | 2019-01-30 | 2020-08-06 | 日産化学株式会社 | Hydrazide compound and kinase inhibitor |
| JP7456859B2 (en) * | 2019-12-04 | 2024-03-27 | 東芝ライフスタイル株式会社 | Rotor and rotor manufacturing method |
| WO2022168708A1 (en) * | 2021-02-03 | 2022-08-11 | 株式会社デンソー | Field magneton |
| DE102021209701A1 (en) | 2021-09-03 | 2023-03-09 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Electromotive feedback drive for a steering system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10127030A (en) * | 1996-10-18 | 1998-05-15 | Matsushita Electric Ind Co Ltd | Brushless motor |
| JPH10256031A (en) * | 1997-01-10 | 1998-09-25 | Mitsubishi Materials Corp | Magnet, manufacture thereof and small-sized motor using the magnet |
| JP2000245116A (en) * | 1999-02-24 | 2000-09-08 | Nippon Densan Corp | Motor |
| CN102510137A (en) * | 2011-10-25 | 2012-06-20 | 捷和电机（深圳）有限公司 | Magnetic component, motor and ceiling fan comprising motor |
| CN105939077A (en) * | 2016-06-17 | 2016-09-14 | 合肥凯邦电机有限公司 | Electrical equipment, fan structure and fan motor thereof |
-
2017
- 2017-12-06 JP JP2017234109A patent/JP2019103322A/en active Pending
-
2018
- 2018-12-05 CN CN201811477955.0A patent/CN109889005A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10127030A (en) * | 1996-10-18 | 1998-05-15 | Matsushita Electric Ind Co Ltd | Brushless motor |
| JPH10256031A (en) * | 1997-01-10 | 1998-09-25 | Mitsubishi Materials Corp | Magnet, manufacture thereof and small-sized motor using the magnet |
| JP2000245116A (en) * | 1999-02-24 | 2000-09-08 | Nippon Densan Corp | Motor |
| CN102510137A (en) * | 2011-10-25 | 2012-06-20 | 捷和电机（深圳）有限公司 | Magnetic component, motor and ceiling fan comprising motor |
| CN105939077A (en) * | 2016-06-17 | 2016-09-14 | 合肥凯邦电机有限公司 | Electrical equipment, fan structure and fan motor thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688451A (en) * | 2019-10-17 | 2021-04-20 | 丰田自动车株式会社 | Rotor and method for manufacturing rotor |
| CN112688451B (en) * | 2019-10-17 | 2024-04-30 | 丰田自动车株式会社 | Rotor and method for manufacturing rotor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019103322A (en) | 2019-06-24 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190614 |
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| WW01 | Invention patent application withdrawn after publication |