CN101162638A - Permanent magnet motor, electrical device and method for manufacturing permanent magnet - Google Patents
Permanent magnet motor, electrical device and method for manufacturing permanent magnet Download PDFInfo
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- CN101162638A CN101162638A CNA200710161265XA CN200710161265A CN101162638A CN 101162638 A CN101162638 A CN 101162638A CN A200710161265X A CNA200710161265X A CN A200710161265XA CN 200710161265 A CN200710161265 A CN 200710161265A CN 101162638 A CN101162638 A CN 101162638A
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Abstract
The present invention provides a permanent magnet motor and the making method thereof. The permanent magnet motor is composed of a rotor and a stator, the rotor comprises a rotor core which is made of magnetic material and is polygon prism shaped and a permanent magnet arranged at the external circumstance surface of the rotor core, the stator is opposite to the external circumstance surface of the rotor and has an electric winding. The permanent magnet is provided with a dent with arc shaped cross section at the position corresponding to the polygon prism shaped each corner, the middle position between the dent and the adjacent dent is provided with a thickest wall part and the permanent magnets leads to the thickest wall part to the magnetic pole center and is magnetized.
Description
Technical field
The present invention relates on the outer peripheral face of the rotor core that constitutes by magnetic material, be fixed with the magneto and the manufacture method thereof of permanent magnet.
Background technology
In the past, magneto be fixed at permanent magnet on the rotor core outer peripheral face, mainly utilize in conjunction with magnet.At this, so-called be meant the composite material permanent magnet that utilizes bond materials such as rubber, thermoplastic resin or thermosetting resin that the permanent magnet powder curing of ferrite type or terres rares is formed in conjunction with magnet.Owing to contain binding constituents, so compare with the sintered magnet of being made by sintering process that does not contain the bond composition, magnetic characteristic is low in conjunction with magnet for this.
But, such in conjunction with magnet because the contraction problem that sintering brings is few, so have the advantage that can make special shapes such as ring-type, circular shape, thin-walled shape with high dimensional accuracy.And,, also can not produce slight crack or problem such as damaged even form special shapes such as such ring-type, circular shape, thin-walled shape.Therefore, in recent years, ring-type in conjunction with magnet mostly as household electrical appliances with motor or information equipment motor.
At this, in conjunction with magnet be divided into anisotropy in conjunction with magnet and isotropism in conjunction with magnet.Anisotropy in conjunction with magnet owing on prescribed direction, produce strong magnetic force, so help the miniaturization or the high performance of motor.But, when making anisotropy, carry out moulding on one side on prescribed direction Yi Bian must in magnetic field, ferromagnetic powder be arranged in conjunction with magnet.Especially, when making the permanent magnet of the special shape that ferromagnetic powder is arranged diametrically with ring-type, even utilize for example rare earth element magnet powder of high-remanece, its performance also is difficult to reach 100%.Therefore, when making annular permanent, the isotropism that just can make simply by compression forming or ejection formation in no magnetic field of only using in conjunction with magnet more.
In addition, the common price of rare earth element magnet powder is more expensive than ferrite type ferromagnetic powder.Therefore, when using the rare earth element magnet powder to make annular permanent, need attenuate permanent magnet thickness radially, reduce the ferromagnetic powder amount.
But,, then have the tendency that becomes big that deviates from of its surperficial flux waveforms and sine waveform if like this with the radial thickness attenuate of permanent magnet.Therefore, when the motor of such permanent magnet is used in rotation, have sound or the vibration of cogging torque when becoming big, motor rotation and become big problem.
At this, the radial thickness of annular permanent and the relation of surface magnetic flux waveform are described.
Figure 16 represents the relation of the radial thickness and the surface magnetic flux waveform of annular permanent.In the figure, measure the surface magnetic flux of the terres rares isotropism of the external diameter 50mm with ends of the earth magnetic pole by magnetometer (gaussmeter) in conjunction with magnet.And, change its internal diameter, be 46mm (magnet wall thickness 2mm), 42mm (magnet wall thickness 4mm), 38mm (magnet wall thickness 6mm), 35.6mm (magnet wall thickness 7.2mm) and measure.
As known in the figure, along with the attenuate of annular permanent magnnet thickness, the peak value of surface magnetic flux reduces.In addition, as can be known, along with the attenuate of annular permanent magnnet thickness, the surface magnetic flux waveform departs from from sine waveform.
Therefore, in order to make such surface magnetic flux waveform, propose to have following technical scheme near sine waveform.
The disclosed technology of the flat 6-217418 communique of Japanese Patent Application Laid-Open is that the inner peripheral surface formation cylindrical shape with permanent magnet forms non-cylindrical with outer peripheral face.And, the radial thickness of portion between the magnetic pole of permanent magnet is set at 0.3～0.7 times scope of the radial thickness of magnetic pole central portion.According to the disclosed technology of this patent documentation, can make the surface magnetic flux waveform near sine waveform, can reduce cogging torque, noise and vibration.
In addition, the disclosed technology of Japanese Patent Application Laid-Open 2003-111360 communique is about having by the annular permanent magnnet of the magnetized a plurality of magnetic poles of sinusoidal wave shape roughly.According to the disclosed technology of this patent documentation, can make surperficial magnet waveform near sine waveform, can reduce cogging torque, noise and vibration.
But in the disclosed technology of the flat 6-217418 communique of Japanese Patent Application Laid-Open, the jog of permanent magnet is relative with stator to be disposed, and produces the stator of portion between magnetic pole and the interval of permanent magnet and becomes problem big, that can not apply flexibly magnetic force effectively.
In addition, in the disclosed technology of Japanese Patent Application Laid-Open 2003-111360 communique, be zero and under incomplete magnetized state, be magnetized owing to make the magnetic flux of portion between magnetic pole, so generation can not be applied flexibly the problem of magnetic force effectively.
Summary of the invention
Magneto of the present invention, it is made of rotor and stator, described rotor has the rotor core of the polygon prism shape that is made of magnetic material and is located at permanent magnet on the outer peripheral face of described rotor core, and the outer peripheral face of described stator and described rotor is relative and have an electric winding.Permanent magnet has the recess that the cross section is a circular shape on the position corresponding with each bight of polygon prism shape, have heavy section in the centre position of this recess and adjacent recess, and described permanent magnet makes this heavy section become pole center and is magnetized.
In addition, the present invention includes the manufacture method of the employed permanent magnet of a kind of above-mentioned magneto.This manufacture method comprises following step: the ferromagnetic powder filling step, at the mould that is formed with cylindric through hole and have between the core with the polygon prism shape of the coaxial central shaft of described through hole and fill ferromagnetic powder; The compression forming step is carried out compression forming by upper plunger and lower plunger with the ferromagnetic powder that is filled; The pressurization steps that keep-ups pressure, the ferromagnetic powder by the moulding of compression forming step applies keep-uping pressure of regulation relatively; Mobile step is being applied with under the state that keep-ups pressure of regulation, mould and core are moved and makes the permanent magnet of regulation shape.
The present invention is by above structure and manufacture method, can reduce cost by the volume of cutting down permanent magnet, and can realize the reduction of the high efficiency of magneto and cogging torque, vibration, noise.In addition, can prevent the slight crack that produces when permanent magnet is made or damaged and a kind of high-quality magneto is provided.
Description of drawings
Fig. 1 is the stereogram of the motor of embodiment of the present invention.
Fig. 2 is the plane graph of the motor of embodiment of the present invention.
Fig. 3 A is the plane graph that constitutes the rotor of above-mentioned motor.
Fig. 3 B is the stereogram that constitutes the rotor of above-mentioned motor.
The key diagram of the situation when Fig. 4 A, Fig. 4 B are the moulding of expression permanent magnet.
Fig. 5 is the flow chart of the manufacturing process of expression permanent magnet.
Fig. 6 is based on the comparative descriptions figure of the difform motor performance of permanent magnet.
Fig. 7 is the section radius of the thickness of corresponding each the heavy section recess 15 of representing the permanent magnet shape and the chart (situation of permanent magnet profile 30mm) of the relation of permanent magnet inside maximum stress.
Fig. 8 is the section radius of the thickness of corresponding each the heavy section recess 15 of representing the permanent magnet shape and the chart (situation of permanent magnet profile 40mm) of the relation of permanent magnet inside maximum stress.
Fig. 9 is the section radius of the thickness of corresponding each the heavy section recess 15 of representing the permanent magnet shape and the chart (situation of permanent magnet profile 50mm) of the relation of permanent magnet inside maximum stress.
Figure 10 is based on the comparative descriptions figure of the difform breaking load of permanent magnet.
Figure 11 is the structure key diagram of the electric equipment (indoor apparatus of air conditioner) of embodiment of the present invention.
Figure 12 is the structure key diagram of the electric equipment (air-conditioner outdoor unit) of embodiment of the present invention.
Figure 13 is the structure key diagram of the electric equipment (water heater) of embodiment of the present invention.
Figure 14 is the structure key diagram of the electric equipment (air purifier) of embodiment of the present invention.
Figure 15 A is the plane graph of rotor of other motors of embodiment of the present invention.
Figure 15 B is the stereogram of rotor of other motors of embodiment of the present invention.
Figure 16 is the key diagram based on the difform surface magnetic flux waveform of permanent magnet of the existing motor of expression.
Embodiment
Below, use the description of drawings embodiments of the present invention.
(execution mode)
Fig. 1 is the stereogram of the magneto (below, be called motor) of embodiment of the present invention, and Fig. 2 is its plane graph.
The motor of present embodiment is the inner rotor type motor of 8 utmost points, 12 grooves that are made of rotor 101 and the stator 103 relative with its outer peripheral face.The axle 2 of the central part that rotor 101 has the rotor core 3 that is made of magnetic material, be configured in rotor core 3 and be fixedly installed on permanent magnet 1 on the outer peripheral face of rotor core 3.Stator 103 has electric winding 102.
Fig. 3 A is the plane graph of rotor that constitutes the motor of present embodiment, and Fig. 3 B is its stereogram.Rotor core 3 constitutes thin plate magnetic steel plate laminated, has axis hole at central part, and outer peripheral face forms the polygon prism shape, is in particular eight prism shapes.Chamfering is carried out in each bight to this polygon prism shape.
In addition, this permanent magnet 1 by compacting shape machine compression in conjunction with magnet with resin combination and resinous principle is solidified make, laminar NdFeB ferromagnetic powder that this will be made by melt spinning method with resin combination in conjunction with magnet and the epoxy resin that has two epoxy radicals in a strand and curing agent are as the main composition composition.That is, as the permanent magnet 1 of present embodiment, terres rares be suitable in conjunction with magnet.
By above formation, the gap of stator 103 and permanent magnet 1 can be always same intervals on the direction of rotation of motor.That is, can prevent to enlarge on one's own initiative between stator 103 and the permanent magnet 1, thus the state of maximal magnetization on the whole peripheral surface of permanent magnet 1, formed, and can reduce cogging torque, noise and vibration.
In addition, forming arc radius R by the recess 15 with permanent magnet 1 is circular shape more than the 4mm, can guarantee the intensity of thinner wall section 17 and prevent slight crack or damaged.
Then, the manufacture method to the permanent magnet 1 that constitutes motor of the present invention describes.The figure of the situation when Fig. 4 A and Fig. 4 B are 1 moulding of expression permanent magnet.In addition, Fig. 5 is the flow chart of the manufacturing process of expression permanent magnet 1.Fig. 4 A represents that the state that kept by 13 pressurizations of upper plunger 12 and lower plunger, Fig. 4 B are the states that is kept and taken out from mould 10 and core 11 by upper plunger 12 and lower plunger 13 pressurizations.
The compression mold of making permanent magnet 1 comprises: mould 10, and it is formed with the through hole of cylindrical shape; The core 11 of eight prism shapes, it has the central shaft coaxial with the through hole of mould 10; Upper plunger 12 and lower plunger 13, it has the outer peripheral face with the roughly the same shape of through hole of mould 10, and has the inner peripheral surface with the roughly the same shape of eight prism shapes of core 11.In addition, move along the vertical direction in the gap that upper plunger 12 and lower plunger 13 can form between mould 10 and core 11.
At first, between mould 10 and core 11, fill ferromagnetic powder (step S1).Carry out compression forming (step S2) by the ferromagnetic powder of filling among upper plunger 12 and 13 couples of step S1 of lower plunger.After the compression forming of ferromagnetic powder finishes, permanent magnet 1 is applied keep-up pressure (the step S3) of regulation.And, be applied with under this state that keep-ups pressure, make mould 10 and core 11 declines (step S4).More than, by moulding permanent magnet 1, can prevent to produce fractures, slight crack or damaged in thinner wall section 17.
Then, the reason that the inner peripheral surface with permanent magnet 1 is formed eight prism shapes describes.
Fig. 6 is the performance of permanent magnet (example 1) that relatively has the inner peripheral surface of eight prism shapes and permanent magnet (example 2, example 3) with inner peripheral surface of cylindrical shape and the key diagram represented.In addition, in this Fig. 6, the motor in the example 1 uses inner peripheral surface to be the cylindrical shape of diameter 40.9mm and permanent magnet magnetized as the pole center ends of the earth with heavy section as positive eight prism shapes of inscribed circle diameter 36.9mm, outer peripheral face.In order to compare, motor in the example 2 uses inner peripheral surface permanent magnet magnetized as the cylindrical shape and the ends of the earth of diameter 40.9mm as cylindrical shape, the outer peripheral face of diameter 37.9mm, and the motor of example 3 uses inner peripheral surface permanent magnet magnetized as the cylindrical shape and the ends of the earth of diameter 40.9mm as cylindrical shape, the outer peripheral face of diameter 37.4mm.Example 1, example 2 and example 3 all utilize the terres rares isotropism of height 14mm to constitute in conjunction with magnet.In addition, in example 1 and the example 2, the permanent magnet volume constitutes in the same manner.
Compare with the surface magnetic flux waveform of example 2 and example 3, the surface magnetic flux waveform of example 1 is close with sine waveform.Hence one can see that, if the permanent magnet of inner peripheral surface eight prism shapes is then compared with the permanent magnet of inner peripheral surface cylindrical shape, cogging torque can be reduced.In addition, if the inductive voltage value of example 1 is made as fiducial value 1, the inductive voltage value of the example 2 of then same magnet volume is 0.88.In addition, the magnet volume is that the inductive voltage value of 1.16 times example 3 is 0.98.By this result as can be known, if the permanent magnet of interior all eight prism shapes is then compared with the permanent magnet of inner peripheral surface cylindrical shape, its inductive voltage value is higher.
In addition, if the efficient of example 1 is made as fiducial value 1, the efficient of the example 2 of then same magnet volume is 0.96.In addition, the magnet volume is that the efficient of 1.16 times example 3 is 0.98.By this result as can be known, if the permanent magnet of inner peripheral surface eight prism shapes is then compared with the permanent magnet of inner peripheral surface cylindrical shape, its efficient is higher.
Then, to the arc radius R of the recess 15 by making permanent magnet 1 be 4mm with on guarantee that the reason of the intensity of thinner wall section 17 describes.
Fig. 7～Fig. 9 is the arc radius R of each thickness of corresponding heavy section recess 15 of representing permanent magnet 1 and the chart of the relation of permanent magnet inside maximum stress.In addition, in this Fig. 7～Fig. 9, represented that by chain-dotted line the thickness of heavy section is the permanent magnet of 2mm, the thickness that is illustrated by the broken lines heavy section is the permanent magnet of 3mm, is represented that by solid line the thickness of heavy section is the permanent magnet of 4mm.In addition, among Fig. 7 the diameter of the outer peripheral face of permanent magnet is made as 30mm and represents, Fig. 8 is made as 40mm with the diameter of the outer peripheral face of permanent magnet and represents, Fig. 9 is made as 50mm with the diameter of the outer peripheral face of permanent magnet and represents.
Diameter at outer peripheral face is under the situation of 30mm, and as shown in Figure 7, the thickness of heavy section is 2mm, 3mm, each permanent magnet of 4mm, produces the inner maximum stress of magnet of 25MPa～30MPa when arc radius R=0mm.And when R was 0mm～4mm, the inner maximum stress of magnet all sharply descended, and was 4mm when above at R, and the inner maximum stress of magnet all is below the 15MPa.
In addition, be under the situation of 40mm at the outer peripheral face diameter, as shown in Figure 8, when arc radius R=0mm, be between each permanent magnet of 2mm, 3mm, 4mm at the thickness of heavy section, the inner maximum stress of magnet has fluctuation.But the thickness of heavy section is each permanent magnet of 2mm, 3mm, 4mm, and when R was 0mm～4mm, the inner maximum stress of magnet all sharply descended, and R is 4mm when above, and magnet inside maximum stress all is below the 15MPa.
In addition, be under the situation of 50mm at the diameter of outer peripheral face, as shown in Figure 9, during arc radius R=0mm, the thickness of heavy section is between each permanent magnet of 2mm, 3mm, 4mm, the inner maximum stress of magnet has fluctuation.But the thickness of heavy section is each permanent magnet of 2mm, 3mm, 4mm, and when R was 0mm～4mm, the inner maximum stress of magnet all sharply descended, and is 4mm when above at R, and the inner maximum stress of magnet all is below the 15MPa.
By above-mentioned record, if making the arc radius R of recess 15 is more than the 4mm, then can reduce the inner maximum stress of magnet significantly, can prevent slight crack or damaged.
In addition, Figure 10 is the figure of breaking load of the permanent magnet of the permanent magnet of comparison inner peripheral surface eight prism shapes and inner peripheral surface cylindrical shape.
In this Figure 10, be that positive eight prism shapes of inscribed circle diameter 36.9mm, permanent magnet and the cylindrical shape that inner peripheral surface is diameter 37.9mm, the permanent magnet that outer peripheral face is the cylindrical shape of diameter 40.9mm of cylindrical shape that outer peripheral face is diameter 40.9mm compare with inner peripheral surface.
The breaking load of the permanent magnet of the circular shape R=0mm of the recess 15 of inner peripheral surface eight prism shapes is 4.5N, and the breaking load of the permanent magnet of inner peripheral surface cylindrical shape is 45N, produces about 10 times gap.
To this, the breaking load of the permanent magnet of the arc radius R=4mm of the recess 15 of inner peripheral surface eight prism shapes is 20N, compares with the breaking load of the permanent magnet of inner peripheral surface cylindrical shape, in about about 2 times gap.Thus,, then breaking load can be improved significantly, slight crack or damaged can be prevented if the arc radius R of recess 15 is made as more than the 4mm.
In addition, the breaking load of the permanent magnet of the arc radius R=9mm of the recess 15 of inner peripheral surface eight prism shapes is 35N, compares with the breaking weight of the permanent magnet of inner peripheral surface cylindrical shape, in about about 1.3 times gap.Thus,, then breaking load can be further increased, slight crack or damaged can be prevented if the arc radius R of recess 15 is made as 9mm.In addition, if the arc radius of this recess 15 is made as more than the 9mm, inner peripheral surface eight prism shape subcylindrical shapes have then been cut down the effect that the magnetic flux density that makes the permanent magnet surface of the present invention becomes sine waveform, and are therefore undesirable.It is desirable to, the arc radius of this recess 15 is the scope of 4mm～9mm.
Then, as the example of electric equipment of the present invention, indoor apparatus of air conditioner, air-conditioner outdoor unit, water heater, air purifier are described.
Figure 11 is the structure key diagram of the electric equipment (indoor apparatus of air conditioner) of embodiment of the present invention.
As shown in figure 11, in the framework 211 of indoor apparatus of air conditioner 210, be equipped with motor 201.Cross flow fan 212 is installed in the rotating shaft of this motor 201.Motor 201 is driven by motor driver 213.By the energising from motor driver 213, motor 201 rotations are followed in this, cross flow fan 212 rotations.Utilize the rotation of this cross flow fan 212, will carry out the empty body after the air conditioning to indoor air-supply by used for indoor machine heat exchanger (not shown).
At this, motor 201 is suitable for the motor that utilizes above-mentioned permanent magnet 1.Thus, can reduce cogging torque, noise and vibration.And,, also can access high output, the effect of the power consumption that can be reduced even descend to the current value of indoor set input.
Then, Figure 12 is the structure key diagram of the electric equipment (air-conditioner outdoor unit) of embodiment of the present invention.As shown in figure 12, air-conditioner outdoor unit 301 is equipped with motor 308 in the inside of framework 311.This motor 308 is equipped with fan 312 in rotating shaft, work with fan electromotor as air-supply.By the upright dividing plate of establishing 304 on the base plate 302 of framework 311, be divided into compressor room 306 and heat exchanger chamber 309.In compressor room 306, dispose compressor 305.In heat exchanger chamber 309, be equipped with heat exchanger 307 and air-supply fan electromotor 308.Dispose Denso tote-box 310 on the top of dividing plate 304.
Blow and follow the rotation of the motor 308 that drives by the motor driver of taking in the Denso tote-box 310 with fan electromotor 308, make blowing fan 312 rotations, by heat exchanger heat exchanger chambers 307 309 air-supplies.At this, motor 308 is suitable for and utilizes the motor that above-mentioned permanent magnet 1 is arranged.Thus, can reduce cogging torque, noise and vibration.And,, also can access high output, the effect of the power consumption that can be reduced even descend to the current value of off-premises station input.
Then, Figure 13 is the structure key diagram of the electric equipment (water heater) of embodiment of the present invention.In the framework 331 of water heater 330, carry motor 333.Fan 332 is installed in the rotating shaft of this motor 333.Motor 333 drives by motor driver 334.By the energising of motor driver 334, make motor 333 rotations, follow in this, make fan 332 rotations.By the rotation of its fan 332, the required air of relative fuel gasification chamber (not shown) air-supply burning.At this, motor 333 is suitable for and utilizes the motor that above-mentioned permanent magnet 1 is arranged.Thus, can reduce cogging torque, noise and vibration.And,, also can access high output, the effect of the power consumption that can be reduced even descend to the current value of water heater input.
Then, Figure 14 is the structure key diagram of the electric equipment (air purifier) of embodiment of the present invention.In the framework 341 of air purifier 340, be equipped with motor 343.Air circulation fan 342 is installed in the rotating shaft of this motor 343.Motor 343 drives by motor driver 344.By energising from motor driver 344, make motor 343 rotations, follow in this, make fan 342 rotations.Rotation by this fan 342 makes air circulation.At this, motor 343 uses and utilizes the motor that above-mentioned permanent magnet 1 is arranged.Thus, can reduce cogging torque, noise and vibration.And,, also can access high output, the effect of the power consumption that can be reduced even descend to the current value of air purifier input.
In addition, in the above description,, exemplified indoor apparatus of air conditioner, air-conditioner outdoor unit, water heater, air purifier, but also applicable other carry the electric equipment (for example various information equipments or industrial equipment) of motor as electric equipment of the present invention.
In addition, in the above-described embodiment, have the rotor core 3 of eight prism shapes and the permanent magnet 1 that inner circumferential surface is eight prism shapes, but as long as be the structure of permanent magnet with the polygon prism shape beyond the eight following prism shapes, it upwards has a plurality of magnetic poles in week, has recess between corresponding each magnetic pole of inner circumferential surface.
In addition, in the above-described embodiment, permanent magnet 1 can be made of in conjunction with in magnet, anisotropy sintered magnet or the anisotropy ferrite magnet any in conjunction with magnet, isotropism sintered magnet, isotropism ferrite magnet, anisotropy isotropism.
In addition, in the above-described embodiment, adopting the cross section of the recess 15 of permanent magnet 1 is the formation of circular shape, but also can adopt the formation of the recess 15 of permanent magnet 1 being carried out chamfering.
Then, Figure 15 A is the plane graph of rotor of other motors of embodiment of the present invention, and Figure 15 B represents its plane graph.This rotor comprises: the rotor core 403 of the hollow bulb that is formed with the polygon prism shape that is made of magnetic material; Be configured in the axle 402 of the central part of rotor core 403; And outer peripheral face is the polygon prism shape with protuberance, the permanent magnet 401 that inner peripheral surface is drum.The present invention also can expand to having the so-called external-rotor motor of this rotor.
Claims (11)
1. magneto, it is made of rotor and stator, described rotor has the rotor core of the polygon prism shape that is made of magnetic material and is located at permanent magnet on the outer peripheral face of described rotor core, and the outer peripheral face of described stator and described rotor is relative and have an electric winding
Described permanent magnet has the recess that the cross section is a circular shape on the position corresponding with each bight of described polygon prism shape, centre position at described recess and adjacent recess has heavy section, and described permanent magnet makes described heavy section become pole center and is magnetized.
2. magneto as claimed in claim 1, wherein, described permanent magnet is that the recess of circular shape forms thinner wall section in described cross section.
3. magneto as claimed in claim 1, wherein, the arc radius of described circular shape is the scope of 4mm～9mm.
4. magneto as claimed in claim 1, wherein, described polygon prism shape is eight prism shapes.
5. magneto as claimed in claim 1, wherein, described permanent magnet be terres rares in conjunction with magnet.
6. electric equipment, it is equipped with the described magneto of claim 1～5.
7. electric equipment as claimed in claim 6, wherein, described electric equipment is any in indoor apparatus of air conditioner, air-conditioner outdoor unit, water heater or the air purifier.
8. the manufacture method of a permanent magnet, this permanent magnet is used for magneto, wherein, described magneto is made of rotor and stator, described rotor has the rotor core of the polygon prism shape that is made of magnetic material and is located at permanent magnet on the outer peripheral face of described rotor core, the outer peripheral face of described stator and described rotor is relative and have an electric winding
Described permanent magnet has the recess that the cross section is a circular shape on the position corresponding with each bight of described polygon prism shape, have heavy section in the centre position of described recess and adjacent recess,
Described manufacture method comprises following step:
The ferromagnetic powder filling step is at the mould that is formed with cylindric through hole and have between the core with the polygon prism shape of the coaxial central shaft of described through hole and fill ferromagnetic powder;
The compression forming step, by upper plunger and lower plunger with the described ferromagnetic powder compression forming that is filled;
The pressurization steps that keep-ups pressure, the ferromagnetic powder by the moulding of described compression forming step applies keep-uping pressure of regulation relatively;
Mobile step is being applied with under the state that keep-ups pressure of described regulation, described mould and described core are moved and makes the permanent magnet of regulation shape.
9. the manufacture method of permanent magnet as claimed in claim 8, wherein, described permanent magnet makes described heavy section become pole center and is magnetized.
10. the manufacture method of permanent magnet as claimed in claim 8, wherein, described permanent magnet is that the recess of circular shape forms thinner wall section in described cross section.
11. the manufacture method of permanent magnet as claimed in claim 8, wherein, the arc radius of described circular shape is the scope of 4mm～9mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP258550/06 | 2006-09-25 | ||
| JP2006258550 | 2006-09-25 |
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| Publication Number | Publication Date |
|---|---|
| CN101162638A true CN101162638A (en) | 2008-04-16 |
| CN101162638B CN101162638B (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710161265XA Active CN101162638B (en) | 2006-09-25 | 2007-09-25 | Permanent magnet motor, electrical device and method for manufacturing permanent magnet |
| CNU2007201255501U Expired - Fee Related CN201134706Y (en) | 2006-09-25 | 2007-09-25 | Permanent-magnetic electric machine and electric equipment loading the same |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201255501U Expired - Fee Related CN201134706Y (en) | 2006-09-25 | 2007-09-25 | Permanent-magnetic electric machine and electric equipment loading the same |
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| CN101834476A (en) * | 2010-01-05 | 2010-09-15 | 陆美娟 | Permanent magnet generator inner rotor using Halback magnetic array |
| CN102255409A (en) * | 2010-05-18 | 2011-11-23 | 佶庆电机有限公司 | Motor device |
| CN103460569A (en) * | 2011-03-30 | 2013-12-18 | 松下电器产业株式会社 | Bonded-magnet rotor, method of manufacturing thereof, and motor provided therewith |
| CN108565993A (en) * | 2018-06-11 | 2018-09-21 | 成都银河磁体股份有限公司 | A kind of magnet |
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| CN103187840A (en) * | 2013-03-11 | 2013-07-03 | 南通万宝磁石制造有限公司 | Production method of motor rotor capable of reducing cogging torque |
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2007
- 2007-09-25 CN CN200710161265XA patent/CN101162638B/en active Active
- 2007-09-25 CN CNU2007201255501U patent/CN201134706Y/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101834476A (en) * | 2010-01-05 | 2010-09-15 | 陆美娟 | Permanent magnet generator inner rotor using Halback magnetic array |
| CN102255409A (en) * | 2010-05-18 | 2011-11-23 | 佶庆电机有限公司 | Motor device |
| CN103460569A (en) * | 2011-03-30 | 2013-12-18 | 松下电器产业株式会社 | Bonded-magnet rotor, method of manufacturing thereof, and motor provided therewith |
| CN103460569B (en) * | 2011-03-30 | 2015-09-30 | 松下电器产业株式会社 | Bonded permanent magnet rotor and its manufacture method and the motor with this bonded permanent magnet rotor |
| US9225212B2 (en) | 2011-03-30 | 2015-12-29 | Panasonic Intellectual Property Management Co., Ltd. | Method of manufacturing bonded-magnet rotor |
| WO2019145832A1 (en) * | 2018-01-26 | 2019-08-01 | Whylot | Unitary magnet having recessed shapes for forming part of contact areas between adjacent magnets |
| FR3077413A1 (en) * | 2018-01-26 | 2019-08-02 | Whylot Sas | UNITARY MAGNET WITH FORWARD-LOOKING SHAPES INTENDED TO BE PART OF CONTACT AREAS BETWEEN ADJACENT MAGNETS |
| CN111801749A (en) * | 2018-01-26 | 2020-10-20 | 万络公司 | Integrated magnet having concave shape to form partial contact area between adjacent magnets |
| CN111801749B (en) * | 2018-01-26 | 2022-04-05 | 万络公司 | Integrated magnet having concave shape to form partial contact area between adjacent magnets |
| US11387028B2 (en) | 2018-01-26 | 2022-07-12 | Whylot Sas | Unitary magnet having recessed shapes for forming part of contact areas between adjacent magnets |
| CN108565993A (en) * | 2018-06-11 | 2018-09-21 | 成都银河磁体股份有限公司 | A kind of magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN201134706Y (en) | 2008-10-15 |
| CN101162638B (en) | 2012-09-26 |
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