CN1866692A - Axial gap motor - Google Patents
Axial gap motor Download PDFInfo
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- CN1866692A CN1866692A CN 200610080381 CN200610080381A CN1866692A CN 1866692 A CN1866692 A CN 1866692A CN 200610080381 CN200610080381 CN 200610080381 CN 200610080381 A CN200610080381 A CN 200610080381A CN 1866692 A CN1866692 A CN 1866692A
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Abstract
An axial gap motor may benefit from a reduction of axial force on the rotor, which may reduce load on the rotor (1) and bearings and reduce the vibration on the surface of the rotor. An air gap (3) is positioned on the stator (2) facing the rotor, and an auxiliary yoke (12) is positioned facing the air gap (13) on the other side of the rotor (1). Magnetic flux Phi circulates from the rotor (1) and the axial force alpha is applied to the rotor when the magnetic flux passes by the air gap surface (1b) on the stator side of the rotor. Axial force beta is applied to the rotor when the magnetic flux passes by the air gap surface on the auxiliary yoke side of the rotor (1). Axial force beta is opposite, or reverse, of axial force alpha and reduces axial force alpha so axial force alpha reduces the load on the rotor (1) and bearings.
Description
Technical field
The present invention relates to the relatively configuration and be accommodated in motor in the casing on rotor rotation direction of rotor and stator, that is, the space between stator and rotor (air gap) is present in the axial gap electric motor between the axis direction opposite face of stator and rotor.
Background technology
Generally use in the synchronized model motor of permanent magnet at rotor, the rotating magnetic field that produces to the stator energising attracts to repel the permanent magnet in the rotor and produces magnetic torque, generally is to make the rotor rotation by this magnetic torque, makes motor starting.
As one of motor of synchronized model rotor and stator relative axial gap electric motor that disposes and be incorporated in the casing on rotor rotation direction are arranged.
As the motor of synchronized model, for example known spy of having opens the axial gap electric motor of 2004-297902 communique record.
Axial gap electric motor is rotor and stator configuration relatively on rotor rotation direction of plate-like.
But, in motor, by switching on and magnetic flux that produces and the magnetic flux that produces by the permanent magnet in the rotor to stator, as the magnetic flux that is used to produce moment, opposite face (air-gap surface) by rotor and stator, but these magnetic fluxs can apply the power of the direction that is helpless to moment to rotor in by air-gap surface.
In the above-mentioned axial gap electric motor, forming the rotor of air gap and the opposite face of stator is the plane vertical with the rotor rotation, therefore between air gap and rotor as the power that is helpless to the output torque of motor, to the power (axle power) of its rotation direction of rotor effect.
In such axial gap electric motor, the magnetic flux that is used to produce moment produces when the face (crack face) by the rotor relative with stator, the power (axle power) that acts on the rotation direction of rotor is only from the power of rotor to the stator direction, therefore rotor is always applied a power from rotor to the direction of stator, the load of rotor and bearing can produce the problem of the surface vibration of rotor when increasing.
And this phenomenon flux controlled zone a little less than not carrying out is particularly remarkable, and the problems referred to above can not be ignored.
Summary of the invention
The present invention researches and develops in view of the above problems, its purpose is to provide a kind of improvement structure of axial gap electric motor, this improvement structure can be offset and reduce or the above-mentioned axle power that acts on rotor that the magnetic flux of cancelling out each other produces by clearance plane the time, address the above problem thus, that is, the problem of the load of rotor and bearing increase and rotor produce the problem of surface vibration.
For this purpose, axial gap electric motor of the present invention has: the rotating shaft that is supported on casing freely rotatably; Link and have the rotor of a plurality of permanent magnets with above-mentioned rotating shaft; With above-mentioned rotating shaft be positioned at coaxial go up and with the relative stator that disposes and have a plurality of coils of one side of the side of above-mentioned rotor; Be positioned at coaxial go up and can not be to the auxiliary yoke that said machine casing is formed by magnet that is accommodated in of rotating shaft direction displacement with above-mentioned rotating shaft with the relative configuration of another side of the side of above-mentioned rotor.
According to axial gap electric motor of the present invention, can be used to produce moment magnetic flux partly or entirely towards the auxiliary yoke that is positioned at the rotor-side of the position opposite of stator, thus, on the rotor cover of the rotor-side opposite with position of stator also by above-mentioned magnetic flux is arranged.
The above-mentioned axle force direction that produces by above-mentioned magnetic flux on axle power that produces by above-mentioned magnetic flux on the rotor cover of the rotor-side opposite with position of stator and the rotor cover in relative stator is opposite like this, and these power are offset minimizing or cancelled out each other on rotor.
Like this, can solve on the rotor cover relative the problem that the above-mentioned axle power that produces by above-mentioned magnetic flux makes the problems referred to above that the load of rotor and bearing increases and rotor produce surface vibration with stator.
Description of drawings
Fig. 1 is the vertical profile side skeleton diagram of a structure example of expression axial gap electric motor;
Fig. 2 only takes out stator and rotor from axial gap electric motor shown in Figure 1, the side skeleton diagram of together representing with the flow direction of magnetic flux;
Fig. 3 is the side skeleton diagram of together representing from as the flow direction of only taking out vitals and magnetic flux the axial gap electric motor of one embodiment of the invention;
Fig. 4 is from the look front front elevation of rotor of axial gap electric motor of the same embodiment of expression of the arrow A direction of Fig. 3;
Fig. 5 is from the look front elevation of stator of the axial gap electric motor that is illustrated in same embodiment of the arrow B direction of Fig. 3;
Fig. 6 is from the look front elevation of the auxiliary yoke the axial gap electric motor that is illustrated in same embodiment of the arrow C direction of Fig. 3;
Fig. 7 is the magnetic flux distribution of the axial gap electric motor of the same embodiment of expression, its (a) is the flux distribution under the situation of the auxiliary yoke core body of auxiliary yoke nothing as shown in FIG. 6, (b) is the flux distribution under the auxiliary yoke situation that auxiliary yoke core body is arranged as shown in FIG. 6;
Fig. 8 be expression with Fig. 3 in assist the side skeleton diagram of major part of axial gap electric motor of an example of the relevant mounting structure of yoke;
Fig. 9 is the major part side skeleton diagram of the axial gap electric motor of another example of the mounting structure of auxiliary yoke among expression and Fig. 3;
Figure 10 is the major part side skeleton diagram of the axial gap electric motor of other examples of the mounting structure of auxiliary yoke among expression and Fig. 3;
Figure 11 is the front elevation identical with Fig. 6 of another configuration example of the expression auxiliary yoke that replaces Fig. 6;
Figure 12 is that other of the expression auxiliary yoke that replaces Fig. 6 constitute the front elevation identical with Fig. 6 of examples;
Figure 13 is the variation in time that expression acts on the epitrochanterian axle power of axial gap electric motor, its (a) is the time dependent flow chart of epitrochanterian axle power that expression acts on the axial gap electric motor that does not have auxiliary yoke as shown in Figure 1, 2, and its (b) is the time dependent flow chart of epitrochanterian axle power that expression acts on the axial gap electric motor with auxiliary yoke shown in Fig. 3,8～10.
Description of reference numerals
1 rotor
2 stators
3 air gaps
4 casings
5 rotor core bodys
6 permanent magnets
7 rotor rotating shafts
8 bearings
9 solenoids
10 stator core bodys
The 11 stators back of the body holds core body
12 auxiliary yokes
13 air gaps
14 teeth
15 insulators
16 auxiliary yoke core bodys
The 17 auxiliary yoke back ofs the body hold core body
18 auxiliary yoke scaffolds
19 seize plate on both sides by the arms
20 thrust bearings
21 seize plate on both sides by the arms
22 thrust bearings
The vortex duplexer of 23 electromagnetic steel plates
24 powder pressing mold core bodys
Embodiment
Below describe embodiments of the present invention in detail based on illustrated embodiment.
Fig. 1 has the problem to be solved in the present invention, is used for the sectional skeleton diagram of the axial gap electric motor of suitable conception of the present invention.
In Fig. 1,1,2 represent rotor and stator respectively, and this rotor 1 and stator 2 exist space (air gap) 3 between the two, and are accommodated in the casing 4 in the configuration relatively on rotor rotation direction.
Above-mentioned rotor 1, the central part 5a of its rotor core body 5 is fastened on the rotor rotating shaft 7, and this rotating shaft 7 is bearing in the casing 4 freely by bearing 8 rotations at two ends, and can not displacement on axis direction.
A plurality of stator core bodys 10 of stator 2 its coiling solenoids 9 with respect to the back of the body hold core body 11 in a circumferential direction uniformly-spaced configuration supporting form.
And this stator 2 is towards making its stator core body 10 across the relative direction of air gap 3 and rotor 1, and with rotor 1 concentric arrangement, and then hold core body 11 via the back of the body and be installed on the casing 4.
In addition, W represents the cooling water channel of the cooling of responsible motor.R represents to be used for the position of rotation of detection rotor 1 and rotation decoder that the order drive control signal of solenoid 9 is provided.
Effect for brief description axial gap electric motor shown in Figure 1, solenoid 9 is driven in turn under the control of not shown converter and is encouraged, upwards form rotation magnetic circle in the week of stator 2 thus, different at the alternating polarity that makes progress in the week of rotor 1 and a plurality of permanent magnets 6 configuration are attracted repulsion by this rotation magnetic circle, rotor 1 is to be driven in rotation with the synchronous speed of this rotation magnetic circle.
Only be then as shown in Figure 2 in the axial gap electric motor shown in Figure 1 about both correlations of rotor 1 and stator 2.
In addition, for simplicity, in Fig. 2, rotor 1 and stator 2 are represented with Fig. 1 left and right sides position opposite ground.
The path that is used to produce the magnetic flux Φ of moment according to Fig. 2 explanation.This magnetic flux Φ enters the stator core body 10 of stator 2 by air gap 3 from rotor 1, the back of the body of process stator 2 holds core body 11 and returns stator core body 10 and bending afterwards, and then from stator core body 10 by air gap 3 towards rotor 1, enter stator 2 from rotor 1 by air gap 3 again and flow.
In this process, the magnetic flux Φ that is used to produce moment is by the face 1a (air-gap surface) of the rotor 1 relative with stator 2, thereby to the axle power α of rotor 1 effect rotor rotation direction.
This power α is the power on 2 directions from rotor 1 to stator only, if therefore this power α is carried out integration on the complete cycle of rotor 1, then on rotor 1 always to an above-mentioned direction continuous action power, rotor 1 occurs and support problem that the load of the bearing 8 (with reference to Fig. 1) that this rotor rotates freely increases and the problem of the surface vibration of rotor 1.
For not producing this type of problem in the present embodiment, as shown in Figure 3,, increased the auxiliary yoke 12 that constitutes by magnetic as described later with respect to the structure of Fig. 2.
Should auxiliary yoke 12 in rotor 1 side opposite with configuration stator 2 with respect to rotor 1 concentric arrangement, preferably have the air gap 13 same between these auxiliary yokes 12 and the rotor 1 with air gap 3, simultaneously, for keeping this air gap 13, will assist yoke 12 can not to the displacement of rotor rotation direction be fixed on (with reference to Fig. 1) in the casing 14.
And the diameter of auxiliary yoke 12 can be identical with the diameter of rotor 1 or bigger than it.
In the present embodiment, rotor 1 is promptly shown in Figure 4 to view as its A, and it equidistantly disposes a plurality of permanent magnets 6 in a circumferential direction with respect to the rotor core body 5 that is made of plate-like magnetic and constitutes.
In addition, permanent magnet 6 as mentioned above, equidistantly dispose in a circumferential direction because be, be fan-shaped so look from rotor rotation direction, and be embedded in the same shaped aperture that is formed on the rotor core body 5, separate week that predetermined distance is configured in rotor 5 but alternating polarity is different upwards.
Above-mentioned rotor 1 is fixed on the central part 5a of rotor core body 5 on the rotor rotating shaft 7.
In addition, stator 2 as promptly shown in Figure 5 to view as the B of Fig. 3 forms following structure: be a plurality of via insulator 15 with solenoid 9 be wound on the tooth 14 stator core body 10 with respect to the stator common back of the body of the plate-like that constitutes by magnetic hold core body 11 in a circumferential direction equidistantly configuration support.
And, be formed for the centre bore 11a of the chimeric rotor rotating shaft 7 of play at the central part of stator support core body 11.
And then auxiliary yoke 12 is the following shape of formation shown in Figure 6 as the C as Fig. 3 to view, promptly, the auxiliary yoke core body 16 of its a plurality of (preferably identical with stator core body 10 numbers), the auxiliary yoke back of the body shared with respect to the plate-like that is made by magnetic holds core body 17 equidistantly configuration support in a circumferential direction.
Carry on the back the centre bore 17a that the central part that holds core body 17 is formed for the chimeric rotor rotating shaft 7 of play at auxiliary yoke.
In addition, to hold the axis direction thickness of core body 11 identical or thicker than it with the stator back of the body as shown in Figure 3 for the auxiliary yoke back of the body axis direction thickness that holds core body 17.
In the axial gap electric motor that constitutes above-mentioned present embodiment, the magnetic flux Φ that is used to produce moment as shown in Figure 3, enter the stator core body 10 of stator 2 by air gap 3 from rotor 1, the back of the body of process stator 2 holds core body 11 and returns stator core body 10 and bending afterwards, and then from stator core body 10 by air gap 3 towards rotor 1, enter the auxiliary yoke core body 16 of auxiliary yoke 12 afterwards by air gap 13 from rotor 1, hold core body 17 through the auxiliary yoke back of the body then and get back to rotor 1, enter stator 2 from rotor 1 by air gap 3 again and flow.
In this process, the magnetic flux Φ that is used to produce moment is by the face 1a (air-gap surface) of the rotor 1 relative with stator 2, thereby to the axle power α of the approaching rotor rotation direction of rotor 1 effect and stator 1.
On the other hand, magnetic flux Φ is by the face 1b (air-gap surface) of rotor 1 of the opposition side of configuration stator 2, thus in effect on the rotor 1 away from the axle power β on the rotation direction of stator 1.
This power β is opposite with above-mentioned axle power α direction, axle power β is carried out integration power of trying to achieve and the power counteracting that axle power α tries to achieve in the complete cycle upper integral of rotor 1 on the complete cycle of rotor 1 reduce, or offset, can solve a power α and act on rotor 1, rotor 1 and support problem that the load of the bearing 8 (with reference to Fig. 1) that this rotor rotates freely increases and the problem of the surface vibration of rotor 1.
According to Figure 13 above-mentioned action effect is described, Figure 13 (a) expression as shown in Figures 1 and 2 not above-mentioned axle power α in the existing axial gap electric motor of auxiliary yoke (unit: N) through the time change (unit: msec), Figure 13 (b) expression be provided with as shown in Figure 3 auxiliary yoke 12 present embodiment axial gap electric motor above-mentioned axle power (alpha+beta) through the time change.
In addition, the negative of the axle power α in Fig. 7 (a) and (b) or (alpha+beta) is the axle power that rotor 1 draws on the direction of being partial to stator 2.
Do not assist in the existing axial gap electric motor of yoke as shown in Figures 1 and 2, bigger shown in Figure 13 (a) with axle power α, relative therewith, be provided with as shown in Figure 3 in the axial gap electric motor of the present embodiment of assisting yoke 12, an axle power alpha+beta can reduce to existing about 1/10 shown in Figure 13 (b).
In addition, in the axial gap electric motor of the present embodiment that has possessed auxiliary yoke 12 as shown in Figure 3, axle power alpha+beta turns to forward shown in Figure 13 (b), this be because, act on by the magnetic flux of 12 of rotor 1 and auxiliary yokes on the rotor 1 axle power β (with reference to Fig. 3) the value of Zhou Fangxiang upper integral gained compare the axle power α (with reference to Fig. 3) that acts on by the magnetic flux of 2 of rotor 1 and stators on the rotor 1 on Zhou Fangxiang integration and must value big slightly.
And, in the present embodiment, auxiliary yoke 12 holds core body 17 with a plurality of auxiliary yoke core bodys 16 with respect to the shared auxiliary yoke back of the body of the plate-like that is made of magnetic and equidistantly arranges supporting in a circumferential direction and constitute, so can obtain following action effect as shown in Figure 6.
The auxiliary yoke 12 of Fig. 7 (a) expression does not have the structure under Fig. 3 and auxiliary yoke core body 16 situations shown in Figure 6, in the case, arrive the magnetic flux path of auxiliary yoke 12 through rotor 1 from stator 2, the magnetic flux inlet area of auxiliary yoke 12 is bigger than the magnetic flux discharge area (the square with the axis basal area of stator core body 10) of stator 2, asymmetric at magnetic flux distribution γ on the air gap 3 of 2 of rotor 1 and stators and the magnetic flux distribution δ on the air gap 13 of 12 of rotor 1 and auxiliary yokes, shown in δ, expand and leak at auxiliary yoke 12 side magnetic fluxs, reduce making it can not fully obtain above-mentioned action effect by axle power β.
Relative therewith, in the present embodiment, auxiliary yoke 12 as shown in Figure 6, be that a plurality of auxiliary yoke core bodys 16 are equidistantly arranged supporting and formation in a circumferential direction with respect to assisting the yoke back of the body to hold core body 17, so shown in Fig. 7 (b), arrive the magnetic flux path of auxiliary yoke 12 through rotor 1 from stator 2, the magnetic flux discharge area of stator 2 (the square with the axis basal area of stator core body 10) is identical with the magnetic flux inlet area (the square with the axis basal area of auxiliary core body 16) of auxiliary yoke 12, magnetic flux distribution γ in the air gap 3 of 2 of rotor 1 and stators and the magnetic flux distribution ε on the air gap 13 of 12 of rotor 1 and auxiliary yokes are symmetrical, when assisting yoke 12, the magnetic flux process do not expand leakage, axle power β forms predetermined power, can guarantee above-mentioned action effect.
In addition, in the present embodiment, to hold the axis direction thickness of core body 11 identical or thick than it with the stator back of the body as shown in Figure 3 for the axis direction thickness that the auxiliary yoke back of the body holds core body 17, so can obtain following effect.
That is, the bar number of the magnetic flux line of decision motor output exists with ... the minimum area of section of magnetic flux path, and the minimum area of section of the magnetic flux path in motor (rotor 1 and stator 2) is held the area of section decision of the magnetic flux path direction of core body 11 by the stator back of the body.
Like this, as shown in this embodiment, the auxiliary yoke back of the body holds the axis direction thickness of core body 17 and carries on the back under the situation of the axis direction thickness that holds core body 11 more than or equal to stator, the area of section that the auxiliary yoke back of the body holds the magnetic flux path direction of core body 17 holds the area of section of the magnetic flux path direction of core body 11 more than or equal to the stator back of the body, in the present embodiment, for reaching above-mentioned action effect, even magnetic flux is through auxiliary yoke 12, the bar number of magnetic flux line can not reduce, reduce and can avoid motor output, realize above-mentioned action effect simultaneously.
In addition, in the present embodiment, as previously mentioned, the diameter of auxiliary yoke 12 can be avoided from the flux leakage of rotor 1 towards auxiliary yoke 12 thus more than or equal to the diameter of rotor 1.Thus, be used to realize that the above-mentioned axle power β (with reference to Fig. 3) of purpose of the present invention forms the power of regulation, can guarantee above-mentioned action effect.
The mounting structure of auxiliary yoke 12 shown in Figure 8 at first is described, it has possessed the cylindraceous auxiliary yoke scaffold 18 that jacket rotor 1 and stator 2, and its cardinal extremity is installed on the casing 4, and free end will assist the periphery of yoke 12 chimeric fixing.
The rotating shaft 7 of rotor 1 connect stators 2 and auxiliary yoke 12 both, the direction of principal axis two ends can not be bearing in to displacement casing 4 by bearing 4 respectively freely rotatably on axis direction.
According to the mounting structure of above-mentioned auxiliary yoke 12, not only can will assist yoke 12 to install, and can guarantee that auxiliary yoke 12 self does not rotate, and therefore can improve its durability with easy structure.
Next the mounting structure of auxiliary yoke 12 shown in Figure 9 is described, it also is to have possessed the cylindraceous auxiliary yoke scaffold 18 that jacket rotor 1 and stator 2, and its cardinal extremity is fixed on the casing 4.
The rotating shaft 7 of rotor 1 connect stators 2 and auxiliary yoke 12 both, the direction of principal axis two ends can not be bearing on the casing 4 to displacement by bearing 4 on the axis direction respectively freely rotatably, but will assist the central part spline of yoke 12 to be entrenched on the described rotor rotating shaft 7 by spline 17b, will assist yoke 12 and rotor 1 together to be accommodated in rotatably in the casing 4 thus.
And, in the free end of auxiliary yoke scaffold 18 on week, embedding from the direction of principal axis both sides and is seized the peripheral part of assisting yoke 12 on both sides by the arms and the circular plate 19 of seizing on both sides by the arms of the pair of nonmagnetic body that disposes formation, circular seize plate 19 on both sides by the arms and 12 of auxiliary yokes are got involved thrust bearing 20 respectively at these, make the auxiliary yoke 12 can not displacement on axis direction on rotor rotating shaft 7.
According to the mounting structure of above-mentioned auxiliary yoke 12, thereby can make auxiliary yoke 12 and together rotation synchronously of rotor 1, so can obtain following action effect.
Promptly, comprise magnetic flux that the permanent magnet 6 (with reference to Fig. 4) of rotating magnetic field that stator 2 produces and rotor 1 produces, make torque generation magnetic flux when auxiliary yoke 12 passes through, make under the static structure of auxiliary yoke 12 as the situation of Fig. 8, be accompanied by the variation of torque generation magnetic flux, auxiliary yoke 12 is rotated synchronously with rotating magnetic field, in auxiliary yoke 12, produce in the vortex flow, as shown in Figure 9 in the structure that auxiliary yoke 12 and rotor 1 are rotated synchronously, can suppress the change of torque generation magnetic flux itself, suppress above-mentioned vortex flow and produce eddy current losses.
In addition, to assist yoke 12 on the rotation direction when limited, to assist the peripheral part of yoke 12 to be limited under the situation on the axis direction by thrust bearing 20 by seizing plate 19 on both sides by the arms as shown in Figure 9, the end play that can make 1 of auxiliary yoke 12 and rotor on the complete cycle and on the integrated radial evenly, can make to the above-mentioned axle power β (with reference to Fig. 3) that realizes purpose of the present invention to keep stable.
Next the explanation mounting structure of auxiliary yoke 12 as shown in figure 10, it also is to have possessed the cylindraceous auxiliary yoke scaffold 18 that jacket rotor 1 and stator 2, its cardinal extremity is installed on the casing 4.
The rotating shaft 7 of rotor 1 connect stators 2 and auxiliary yoke 12 both, the direction of principal axis two ends can not be bearing in the casing 4 to displacement on axis direction freely rotatably by bearing 4 respectively.And, in the free end of auxiliary yoke scaffold 18 on week, the circular plate 21 of seizing on both sides by the arms of seizing the roughly whole pair of nonmagnetic body formation of auxiliary yoke 12 from the direction of principal axis both sides on both sides by the arms in embedding, between these circular interior perimembranous of seizing plate 21 and auxiliary yoke 12 on both sides by the arms, get involved thrust bearing 22 respectively, make auxiliary yoke 12 on rotor rotating shaft 7 not to the axis direction displacement.
In the mounting structure of above-mentioned auxiliary yoke 12, identical with the auxiliary yoke mounting structure of Fig. 9, auxiliary yoke 12 rotates synchronously with rotor 1, therefore with Fig. 9 in same action effect, promptly, can realize suppressing the change of torque generation magnetic flux itself, and suppress to produce in the auxiliary yoke 12 action effect of vortex flows and the action effects that suppress to produce eddy current losses.
In addition, in the time of will assisting yoke 12 to be limited on the rotation direction, as shown in figure 10, the interior perimembranous of auxiliary yoke 12 is limited under the situation on the axis direction by seizing plate 21 on both sides by the arms via thrust bearing 22, the peripheral speed of thrust bearing 22 reduces, and durability improves, simultaneously, thrust bearing 22 miniaturizations, cost and weight aspect also benefit.
And, in the foregoing description, auxiliary yoke 12 as shown in Figure 6, be that the auxiliary yoke back of the body that a plurality of auxiliary yoke core bodys 16 are shared with respect to the plate-like that is made of magnetic holds core body 17 and equidistantly arranges supporting in a circumferential direction and constitute, but auxiliary yoke 12 in addition as shown in figure 11, by with electromagnetic steel plate 23 from central division continuously the vortex duplexer of the electromagnetic steel plate that is laminated of vortex shape constitute, perhaps constitute by powder pressing mold core body 24 as shown in figure 12, can realize above-mentioned each action effect.
In addition, auxiliary yoke 12 is as under Fig. 9 and the situation that is rotated supporting shown in Figure 10, because the rotating magnetic field that the excitation of stator 2 produces is a cause, in auxiliary yoke 12, the tendency that produces vortex flow is arranged, therefore will assist yoke 12 to constitute by the duplexer of electromagnetic steel plate 23 as shown in figure 11, perhaps constitute by powder pressing mold core body 24 as shown in figure 12, be difficult to produce vortex flow in the auxiliary yoke 12, thereby the eddy current losses that lowers in the auxiliary yoke 12 is very important.
Under the situation that auxiliary yoke 12 is made of the duplexer of electromagnetic steel plate 23 as shown in figure 11 or is made of powder pressing mold core body 24 as shown in figure 12, it is identical or than its thick action effect under more helping producing that the axis direction thickness of auxiliary yoke 12 and the stator back of the body hold the axis direction thickness of core body 11
That is, the bar number of the magnetic flux line of decision motor output exists with ... the minimum area of section of magnetic flux path, and the minimum area of section of the magnetic flux path in motor (rotor 1 and stator 2) is held the area of section decision of the magnetic flux path direction of core body 11 by the stator back of the body.
Therefore, auxiliary yoke 12 is made of the duplexer of electromagnetic steel plate 23 as shown in figure 11, or when constituting by powder pressing mold core body 24 as shown in figure 12, the axis direction thickness of auxiliary yoke 12 is carried on the back under the situation of the axis direction thickness that holds core body 11 more than or equal to stator as mentioned above, the area of section of the magnetic flux path direction of auxiliary yoke 12 holds the area of section of the magnetic flux path direction of core body 11 more than or equal to the stator back of the body, does not have thus to avoid the problem that motor output reduces when situation that the bar number of magnetic flux line reduces can realize above-mentioned action effect.
Claims (8)
1. axial gap electric motor, this axial gap electric motor is bearing in rotating shaft on the casing freely, is formed with this rotating shaft binding and rotor and the relative stator that disposes and have a plurality of coils with the one side of the direction of principal axis side of above-mentioned rotor with a plurality of permanent magnets by rotation, it is characterized in that
Be oppositely arranged with the direction of principal axis side of an opposite side with rotor-side of said stator with the auxiliary yoke that forms by magnetic that can not be accommodated in to the mode of rotating shaft direction displacement in the said machine casing.
2. axial gap electric motor as claimed in claim 1 is characterized in that, above-mentioned auxiliary yoke is accommodated in the said machine casing in the mode that can not rotate.
3. axial gap electric motor as claimed in claim 1 is characterized in that, above-mentioned auxiliary yoke can be accommodated in the said machine casing with above-mentioned rotor one rotation.
4. as each described axial gap electric motor of claim 1～3, it is characterized in that the auxiliary yoke back of the body that above-mentioned auxiliary yoke has a plurality of auxiliary yoke core bodys and above-mentioned a plurality of auxiliary yoke core bodys arranged in a circumferential direction the plate-like of supporting holds core body.
5. axial gap electric motor as claimed in claim 4, it is characterized in that, said stator has the stator back of the body that a plurality of stator core bodys of coiling coil are arranged the plate-like that forms of supporting in a circumferential direction and holds core body, and the axial thickness of rotation that the above-mentioned auxiliary yoke back of the body holds core body holds the axial thickness of rotation of core body more than or equal to the said stator back of the body.
6. as each described axial gap electric motor of claim 1～3, it is characterized in that above-mentioned auxiliary yoke is made of the vortex duplexer or the powder pressing mold core body of electromagnetic steel plate.
7. axial gap electric motor as claimed in claim 6, it is characterized in that, said stator has the stator back of the body that a plurality of stator core bodys of coiling coil are arranged the plate-like that forms of supporting in a circumferential direction and holds core body, and the axial thickness of the rotation of above-mentioned auxiliary yoke holds the axial thickness of rotation of core body more than or equal to the said stator back of the body.
8. as the described axial gap electric motor of claim 1～3, it is characterized in that above-mentioned its diameter of auxiliary yoke is more than or equal to the diameter of above-mentioned rotor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005143358 | 2005-05-17 | ||
| JP143358/05 | 2005-05-17 | ||
| JP49828/06 | 2006-02-27 |
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| CN1866692A true CN1866692A (en) | 2006-11-22 |
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| CN 200610080381 Pending CN1866692A (en) | 2005-05-17 | 2006-05-16 | Axial gap motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102939415A (en) * | 2010-06-16 | 2013-02-20 | Bsh博世和西门子家用电器有限公司 | Household appliance, in particular a washing machine having a stationary detergent tank |
| CN103346633A (en) * | 2013-07-05 | 2013-10-09 | 西北工业大学 | Disc-type vibration motor |
| CN103560616A (en) * | 2013-11-06 | 2014-02-05 | 上海工业自动化仪表研究院 | Separating-type fan in standard container of flow test device |
| CN108233656A (en) * | 2018-03-01 | 2018-06-29 | 西安科技大学 | A kind of ultrahigh speed disc type permanent magnet synchronous electric motor |
| CN111566902A (en) * | 2018-03-08 | 2020-08-21 | 株式会社日立产机系统 | Axial gap type rotating electric machine |
| CN118487397A (en) * | 2024-05-13 | 2024-08-13 | 南京理工大学 | Axial magnetic field lightweight rotor motor reducer integrated rotating device |
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- 2006-05-16 CN CN 200610080381 patent/CN1866692A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102939415A (en) * | 2010-06-16 | 2013-02-20 | Bsh博世和西门子家用电器有限公司 | Household appliance, in particular a washing machine having a stationary detergent tank |
| CN102939415B (en) * | 2010-06-16 | 2015-12-16 | Bsh家用电器有限公司 | Home appliances, particularly there is the washing machine of static cleaning solution bucket |
| CN103346633A (en) * | 2013-07-05 | 2013-10-09 | 西北工业大学 | Disc-type vibration motor |
| CN103560616A (en) * | 2013-11-06 | 2014-02-05 | 上海工业自动化仪表研究院 | Separating-type fan in standard container of flow test device |
| CN108233656A (en) * | 2018-03-01 | 2018-06-29 | 西安科技大学 | A kind of ultrahigh speed disc type permanent magnet synchronous electric motor |
| CN108233656B (en) * | 2018-03-01 | 2023-11-14 | 西安科技大学 | Ultra-high-speed disc type permanent magnet synchronous motor |
| CN111566902A (en) * | 2018-03-08 | 2020-08-21 | 株式会社日立产机系统 | Axial gap type rotating electric machine |
| CN118487397A (en) * | 2024-05-13 | 2024-08-13 | 南京理工大学 | Axial magnetic field lightweight rotor motor reducer integrated rotating device |
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