CN103427505B - Motor - Google Patents
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- CN103427505B CN103427505B CN201310183100.8A CN201310183100A CN103427505B CN 103427505 B CN103427505 B CN 103427505B CN 201310183100 A CN201310183100 A CN 201310183100A CN 103427505 B CN103427505 B CN 103427505B
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Abstract
Problem of the present invention is to provide a kind of resonance of the tooth that can suppress in stator and the motor that can cool magnet exciting coil.Motor of the present invention (10) possesses: have the rotor (30) of rotating shaft (31), in the circumference of described rotating shaft (31), surround the stator (20) of rotor (30), stator (20) have magnet exciting coil (23) has been installed multiple teeth (22,22 ...), each tooth (22) is respectively equipped with vibrationproof cooling component (50) in the mode outstanding from its surface, in the upper vibrationproof cooling component (50) arranged of each tooth (22), there is the difference of weight.
Description
Technical field
The present invention relates to motor.
Background technology
Conventionally, there is known various motor, as one of them, there will be a known switched reluctance motor disclosed in patent documentation 1 (below, also referred to as " SR motor ".)。
As shown in Figure 6, this SR electric tools is standby: the rotor 102 with rotating shaft 101; The circumference of rotating shaft 101 is surrounded the stator 103 of this rotor 102.Stator 103 has: and rotor 102 separates the interval of regulation and surrounds the stator core 104 of this rotor 102 in the circumferential; The multiple teeth 105 extended from stator core 104 towards rotor 102,105, The magnet exciting coil 106 that each tooth 105 is arranged.This magnet exciting coil 106 is formed by the conductor lines such as insulation-coated coppers being wound on tooth 105.Rotor 102 have from rotor subject 107 multiple salient poles 108 outstanding to radial direction, 108 ...
In SR motor 100, by the magnetic field formed by magnet exciting coil 106, the tooth 106 of each salient pole 108 of rotor 102 to the direction of rotation front side of rotating shaft 101 is furthered.Thus, rotor 102 is carried out rotating and is externally transmitted by rotating shaft 101 by this revolving force.
[at first technical literature]
[patent documentation]
[patent documentation 1] Japanese Unexamined Patent Publication 2008-249240 publication
[summary of invention]
[inventing the problem that will solve]
In above-mentioned SR motor 100, rotate to make rotor 102, tooth 105 is furthered intermittently by the salient pole 108 of magnetic attraction by rotor 102, there is the situation that each tooth 105 is subject to the exciting force of the higher harmonic component of the eigentone more containing this tooth 105 thus.In this case, there is resonance and the vibration of stator 103 increased in each tooth 105, thus produces noise in SR motor 100.
In addition, in above-mentioned SR motor 100, supply electric current intermittently to magnet exciting coil 106, each magnet exciting coil 106 generates heat thus, therefore from the view point of the thermal endurance of the coating film in the conductor lines such as the insulation-coated coppers of excitation coil 106, need to cool magnet exciting coil 106.
At this, the situation of SR motor is illustrated, but the attraction of the magnetic force between the stator by being produced by magnet exciting coil and rotor and repulsion is carried out to the usual motor that rotates too.
Summary of the invention
Therefore, in view of the above problems, its problem is to provide a kind of resonance of the tooth that can suppress in stator and the motor that can cool magnet exciting coil in the present invention.
[for solving the means of problem]
Present inventor carry out various research as a result, find realize above-mentioned purpose by following the present invention.That is, in a mode of motor of the present invention, described electric tools is standby: the rotor with rotating shaft; The circumference of described rotating shaft is surrounded the stator of described rotor.Further, described stator has the multiple teeth having installed magnet exciting coil, each tooth is respectively equipped with from the outstanding vibrationproof cooling component in its surface, in each vibrationproof cooling component of described multiple tooth, there is the difference of weight.
According to such structure, make tooth eigentone each other become different values by arranging the vibrationproof cooling component varied in weight, thus suppress the resonance between above-mentioned tooth, thereby, it is possible to the generation of the noise suppressing the described resonance in motor to cause.Further, by vibrationproof cooling component is arranged at tooth in a projecting manner, the area in the face of the heat transmitted from magnet exciting coil to tooth that allows to thus to shed increases, and thus, effectively cools magnet exciting coil.
Further, in above-mentioned motor, preferably following mode.First, in above-mentioned motor, it is characterized in that, described stator has and described rotor separates the interval of regulation and surrounds the stator core of this rotor in the circumferential direction, described each tooth extends from described stator core towards described rotor respectively, and described vibrationproof cooling component is arranged on the end of the described rotor-side in described each tooth.
According to such structure, owing to being provided with the component (vibrationproof cooling component) of the weight of regulation at the free end (leading section) of the tooth being arranged at stator core with cantilever position, therefore, it is possible to make the eigentone of this tooth effectively change.Thereby, it is possible to suitably change tooth eigentone each other.
In addition, the feature of above-mentioned motor is, described electric tools is standby leaves the end of at least side of described rotating shaft and by the housing of described rotor and described stator surrounding, described vibrationproof the cooling end of the side contrary with described tooth of component and described housing connect.
According to such structure, conducted heat to housing by vibrationproof cooling component from magnet exciting coil to the heat of tooth transmission, thus also dispel the heat from the surface of this housing, therefore, it is possible to more effectively cool magnet exciting coil.
In addition, in the another way of motor of the present invention, described electric tools is standby: the rotor with rotating shaft; The circumference of described rotating shaft is surrounded the stator of described rotor; Stay at least side of described rotating shaft end and by the housing of described rotor and described stator surrounding.And, described stator has and described rotor separates the interval of regulation and surrounds the stator core of this rotor in the circumferential direction, the multiple teeth extended from described stator core towards described rotor, each tooth has the vibrationproof cooling spring member be connected with described housing by this tooth respectively, the end that described vibrationproof cooling spring member has with the rotor-side of described tooth carries out conjugating from initial position and produces elastic force, and by this elastic force to the end of described rotor-side to return described initial position direction force shape, in each vibrationproof cooling spring member of described multiple tooth, there is the difference of spring constant.
According to such structure, because the tooth eigentone being each other provided with the different vibrationproof cooling spring member of spring constant becomes different values, therefore can suppress the resonance between above-mentioned tooth, thus, the generation of the noise in motor can be suppressed.Specifically, when such as carrying out vibrating (displacement) to the direction orthogonal with output shaft in the front end of tooth, the tooth being provided with the different vibrationproof cooling component of spring constant each other in, the eigentone of tooth vibrationproof cooling spring member generation strain being caused because of this vibration is different.Therefore, in this motor, the tooth that the frequency content of the exciting force produced by the electromagnetic force under certain rotating speed is consistent with resonance frequency becomes local, consequently, can suppress the increase of the vibration of stator entirety.Thereby, it is possible to suppress the noise produced by motor.
And, by arranging vibrationproof cooling spring member in the mode be connected with housing by tooth, thus the area (surface area) in the face of the heat transmitted from magnet exciting coil to tooth that allows to shed increases, and make described heat by this vibrationproof cooling spring member to housing transmission, thus also dispel the heat from the surface of this housing, effectively can cool magnet exciting coil thus.
Above-mentioned motor can be such as switched reluctance motor.
[invention effect]
By more than, according to the present invention, the resonance of the tooth that can suppress in stator can be provided and the motor of magnet exciting coil can be cooled.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional view of the switched reluctance motor of the first execution mode.
Fig. 2 is the transverse sectional view of described switched reluctance motor.
Fig. 3 (A) is the partial enlarged drawing of the transverse sectional view of described switched reluctance motor, and Fig. 3 (B) is from the figure that the arrow A direction of Fig. 3 (A) is observed under the state that straighe is widened in the stator core of the tubular in Fig. 3 (A).
Fig. 4 (A) is the partial enlarged drawing of the cross section of the switched reluctance motor of the second execution mode, Fig. 4 (B) be the stator core of tubular in Fig. 4 (A) of the switched reluctance motor by the second execution mode widen straighe state under the figure that observes from the arrow B direction of Fig. 4 (A).
Fig. 5 (A) is the partial enlarged drawing of the cross section of the switched reluctance motor of another execution mode, Fig. 5 (B) be the stator core of tubular in Fig. 5 (A) of the switched reluctance motor by another execution mode widen straighe state under the figure that observes from the arrow C direction of Fig. 5 (A).
Fig. 6 is the transverse sectional view of existing switched reluctance motor.
[symbol description]
10 switched reluctance motors (motor)
11 housings
20 stators
21 stator cores
22 teeth
23 magnet exciting coils
30 rotors
31 output shafts (rotating shaft)
32 rotor subjects
33 salient poles
50,250 vibrationproof cooling components
50A first component
50B second component
50C the 3rd component
150 spring members (vibrationproof cooling spring member)
Embodiment
Below, based on accompanying drawing, the first execution mode of the present invention is described.It should be noted that, marked the representation same structure of prosign in the various figures, suitably the description thereof will be omitted.
The motor of present embodiment is that so-called switched reluctance motor is (below, also referred to as " SR motor ".), as shown in Fig. 1 ~ Fig. 3 (B), it possesses housing (accepting container, framework) 11, stator (fixture) 20, the rotor (revolving part) 30 with output shaft (rotating shaft, axle) 31, vibrationproof cooling component 50.In this SR motor 10, under the state making a part for output shaft 31 externally give prominence to, rotor 30 is configured in housing 11 in the mode in each axle center consistent (coaxially) with stator 20, and by the magnetic field (rotating magnetic field) rotating change, rotor 30 is rotated.
Specifically, as follows.
Housing 11 possesses: the housing body 12 of substantially cylindrical shape; The front rack 13 of the open end of one side of this housing body 12 inaccessible is installed in the open side of a side (right side in Fig. 1) of housing body 12; The end bracket 14 of the open end of the opposing party of this housing body 12 inaccessible is installed in the open side of the opposing party (left side in Fig. 1) of housing body 12.Front rack 13 and end bracket 14 have bearing 15,16 respectively, and output shaft 31 axle of rotor 30 supports as rotating by each bearing 15,16.
Stator 20 possess stator core 21, multiple (being 12 in the example of present embodiment) tooth 22,22 ..., and this stator 20 is at circumference (direction of rotation) the upper encirclement rotor 30 of output shaft 31.
Stator core 21 has and rotor 30 separates the interval of regulation and surrounds the substantially cylindrical shape of this rotor 30 in the circumferential, and it is fixed on the inner peripheral surface 12a of housing body 12.
Each tooth 22 is the ridge positions extending from this stator core 21 towards rotor 30 respectively in the region surrounded by stator core 21 and extend along output shaft 31 direction.Each tooth 22 is provided with magnet exciting coil (winding) 23.This magnet exciting coil 23 is formed by being wound on tooth 22 by the conductor lines that insulator is coated by insulation-coated coppers etc.Form magnetic pole by such tooth 22 and magnet exciting coil 23, this magnetic pole is arranged with the number (number of magnetic poles) of regulation.The number of magnetic poles of present embodiment is such as 12.In this SR motor 10, by be arranged on so multiple teeth 22,22 ... on each magnet exciting coil 23 supply the electric current of phase difference of regulation, form described rotating magnetic field, thus, rotor 30 rotated.
The stator 20 possessing above stator core 21 and tooth 22 is such as by by stacked for multiple electromagnetic steel plate and formed.It should be noted that, stator 20 is not defined as the structure be laminated by electromagnetic steel plate, such as, can also be the so-called dust core formed by soft-magnetic body powder etc.
Rotor 30 possesses output shaft 31, is output the rotor subject 32 of the cylindrical shape that axle 31 passes, multiple (the example of present embodiment be 8) salient pole 33 outstanding to radial direction from the outer peripheral face of rotor subject 32,33 ...Each salient pole 33 be along output shaft 31 direction extend ridge, above-mentioned multiple salient poles 33,33 ... the outer peripheral face of rotor subject 32 is circumferentially arranged at equal intervals.
Under the state that output shaft 31 is supported on the bearing 16 be arranged in end bracket 14 at end (left end in Fig. 1) axle of a side, extended outward through front rack 13, thus the output rotation by rotor 30 produced is transmitted to the outside of housing 11.
Vibrationproof cooling component 50 is arranged at each tooth 22 respectively in the mode that the surface from tooth 22 is outstanding.This vibrationproof cooling component 50 has solid post shapes, tooth 22 and housing 11 (specifically, being front rack 13 or end bracket 14) is connected.The vibrationproof cooling component 50 of present embodiment is formed by copper, but is not defined as this raw material, such as, also can be aluminium etc.
Specifically, vibrationproof cooling component 50 extends from the both ends, output shaft 31 direction end (leading section) 22a of rotor 30 side of tooth 22 respectively.In the vibrationproof cooling component 50 arranged, there is the difference of weight in each tooth 22.In the present embodiment, vibrationproof cooling component 50,50 weight each other adjacent tooth 22,22 arranged is different.Specifically, in the SR motor 10 of present embodiment, three kinds of (the first ~ three component 50A, 50B, 50C) vibrationproof cooling components 50 that operating weight is different.Further, each vibrationproof cooling component 50A, 50B, 50C are such as in fig. 2 to be arranged at each tooth 22 along the mode making the first component 50A, second component 50B clockwise, the 3rd component 50C repeats in turn.Thus, be formed as the state that the eigentone of adjacent tooth 22,22 is different, thus the resonance between above-mentioned tooth 22,22 can be suppressed.
The vibrationproof cooling of present embodiment is all formed (that is, being formed by identical raw material) by copper with component 50, therefore changes weight by changing sectional area (size), but also can change weight by feed change.In addition, by changing the number of the vibrationproof cooling component 50 arranged on each tooth 22, the state making the eigentone of each tooth 22 different can also be formed as.
According to above SR motor 10, tooth 22,22 eigentone is each other made to become different values by arranging the vibrationproof cooling component 50 varied in weight, thus suppress the resonance between above-mentioned tooth 22,22, thereby, it is possible to the generation of the noise suppressing the above-mentioned resonance in SR motor 10 to cause.And, by vibrationproof cooling component 50 is arranged on tooth 22 in a projecting manner, thus the area (surface area) in the face (radiating surface) of the heat transmitted from magnet exciting coil 23 to tooth 22 that allows to shed increases, and thus, effectively cools magnet exciting coil 23.
In addition, in the SR motor 10 of present embodiment, owing to being provided with the component (vibrationproof cooling component) 50 of predetermined weight at free end (leading section) 22a being arranged at the tooth 22 in stator core 21 with cantilever position, therefore, it is possible to make the eigentone of this tooth 22 effectively change.Thereby, it is possible to suitably change tooth 22,22 eigentone each other.
In addition, in the SR motor 10 of present embodiment, tooth 22 is connected with housing 11 by vibrationproof cooling component 50, therefore the heat transmitted from magnet exciting coil 23 to tooth 22 is conducted heat to housing 11 by vibrationproof cooling component 50, thus also dispel the heat from the surface of this housing 11, therefore, it is possible to more effectively cool magnet exciting coil 23.
Then, with reference to Fig. 4 (A) and Fig. 4 (B), the second execution mode of the present invention is described, but in the structure same with above-mentioned first execution mode, use prosign, and omit detailed description, and only different structures is described in detail.
In the SR motor of present embodiment, the SR motor 10 of vibrationproof cooling component 150 and the first execution mode prevent cooling component 50 different.The vibrationproof cooling component 150 of present embodiment is the spring member (vibrationproof cooling spring member) the leading section 22a of tooth 22 and housing 11 (specifically, being front rack 13 or end bracket 14) connected.This spring member 150 carries out conjugating from initial position with the leading section 22a of tooth 22 and produces elastic force, and by this elastic force to the leading section 22a of tooth 22 to the direction force returning initial position.Multiple tooth 22,22 ... each spring member 150 in, there is the difference of spring constant.Namely, the vibrationproof cooling component 50 of the first execution mode changes the eigentone of each tooth 22 by the difference of the weight (deadweight) of vibrationproof cooling component self, in contrast, the vibrationproof cooling component (spring member) 150 of present embodiment changes the eigentone of each tooth 22 by the difference of spring constant.
Tooth 22 is connected with front rack 13 (or end bracket 14) by this spring member 150, and when observing towards the radial outside of output shaft 31, has the square tube shape of rectangular shape.The spring member 150 of present embodiment is such as formed by copper, but is not defined as this raw material.As shown in Fig. 4 (B), each spring member 150 (150A, 150B, 150C) changes spring constant by changing thickness.
When the front end 22a of tooth 22 vibrates (displacement) to the direction orthogonal with output shaft 31, the spring member 150 of such structure carries out strain by this vibration, thus generation elastic force, and suppress the vibration of tooth 22 (vibration is diminished) by this elastic force.Now, vibration (eigentone) between the tooth 22,22 of the state after vibration being diminished by making the spring constant of spring member 150 difference is different, suppress above-mentioned tooth 22,22 resonance each other thus, thus the noise that the SR motor 10 caused because of this resonance produces can be suppressed.
In addition, this spring member 150 is arranged in the mode be connected with housing 11 by tooth 22, the area in face of the heat transmitted from magnet exciting coil 23 to tooth 22 of allowing to thus to shed increases, and described heat is conducted heat to housing 11 by this spring member 150, thus also dispel the heat from the surface of this housing 11, can effectively cool magnet exciting coil 23 thus.
It should be noted that, motor of the present invention is not defined as first and second execution mode above-mentioned, and it is self-evident for can applying various change without departing from the spirit and scope of the invention.
The motor of first and second execution mode above-mentioned is SR motor, but is not defined as the motor of this form.That is, as long as when making rotor rotate in the attraction that the magnetic force formed by magnet exciting coil is produced and repulsion, on the tooth surrounding the stator around this rotor, the motor of vibrative form, just can be suitable for the present invention.Such as, the motor that can be made up of stacked steel plate for the synchronous motor, induction motor etc. of carry magnet or stepping motor etc.
The concrete configuration sequence of the vibrationproof cooling component 50 that varies in weight (or spring constant different spring member 150) does not limit.Such as, vibrationproof cooling component 50A, 50B, 50C random arrangement that can will vary in weight, further, also can in fig. 2 along clockwise with the first component 50A, second component 50B, the 3rd component 50C, second component 50B, the first component 50A, second component 50B ... Deng arranged in order.In addition, the weight (or spring constant of spring member 150) of vibrationproof cooling component 50 is not defined as three kinds, as long as the eigentone between tooth 22,22 can be made different and suppress the weight (spring constant) of tooth 22,22 resonance each other, can be more than two kinds or four kinds.
In addition, if make to be arranged on multiple tooth 22,22 ... on each vibrationproof cooling component 50 (or spring member 150) in the weight (or spring constant of at least one spring member 150) of at least one vibrationproof cooling component 50 different.Thus, the resonance of the tooth 22 of the tooth 22 that can suppress the vibrationproof cooling component (being such as 50A) (or spring member of different spring constants (being such as 150A)) being provided with this different weight and the vibrationproof cooling component (being such as 50B or 50C) (or other spring member (being such as 150B or 150C)) being provided with other, consequently, the level of the noise that the described resonance produced by motor can be made to cause reduces.
In the SR motor of first and second execution mode above-mentioned, at the leading section 22a of tooth 22, vibrationproof cooling component 50 (or spring member 150) extends (in FIG from two ends, output shaft 31 direction respectively, extend from the left and right directions two ends of tooth 22 respectively), but also can only extend from the end of the side in output shaft 31 direction (in FIG, can only extend from the side end the left and right directions of tooth 22).
In addition, the allocation position of vibrationproof cooling component 50 or spring member 150 is not defined as the leading section 22a of tooth 22, such as, can be arranged on the base portion side (stator core 21 side) of tooth 22 yet.
In addition, linearly or the substantially linear of the vibrationproof cooling component 50 of above-mentioned first execution mode extends, but also in midway bending or can bend, and the vibrationproof cooling end of the side contrary with tooth 22 in component 50 is connected with the perisporium (housing body 12 etc.) of housing 11.
In addition, tooth 22 is connected with housing 11 with component 50 by the vibrationproof cooling of above-mentioned first execution mode, but be not defined as this structure, also can as shown in Fig. 5 (A) and Fig. 5 (B), vibrationproof cooling component 250 extends from tooth 22, and the end of the side contrary with tooth 22 becomes free end.Even if vibrationproof cooling component 250 is such structure, as long as vibrationproof cooling uses component 250 (such as, 250A, 250B) varying in weight each other, tooth 22,22 eigentone being each other provided with above-mentioned vibrationproof cooling component 250A, 250B just can be made different, and, by being formed as from the outstanding shape of tooth 22, can increasing heat radiation area and magnet exciting coil 23 is cooled.
In addition, the concrete shape of vibrationproof cooling component does not limit.Such as, the vibrationproof cooling component of above-mentioned first execution mode is column, but is not defined in this, such as, also can be hemispherical or tabular.That is, as long as vibrationproof cooling component has the face (surface of the size of regulation) of the heat transmitted from magnet exciting coil 23 to tooth 22 that can shed.
In addition, the concrete shape of the spring member 150 of above-mentioned second execution mode does not limit.Such as, the spring member 150 of above-mentioned second execution mode is square tube shape, but is not defined as this shape.Spring member such as can also be made up of helical spring or leaf spring etc.
Claims (6)
1. a motor, is characterized in that, possesses:
There is the rotor of rotating shaft;
The circumference of described rotating shaft is surrounded the stator of described rotor,
Described stator has the multiple teeth having installed magnet exciting coil,
Each tooth is respectively equipped with vibrationproof cooling component in the mode outstanding from its surface,
In the vibrationproof cooling component arranged, there is the difference of weight in described each tooth.
2. motor according to claim 1, is characterized in that,
Described stator has and described rotor separates the interval of regulation and surrounds the stator core of this rotor in the circumferential direction,
Described each tooth extends from described stator core towards described rotor respectively,
Described vibrationproof cooling component is arranged on the end of the described rotor-side in described each tooth.
3. motor according to claim 1 and 2, is characterized in that,
Described electric tools is standby stay at least side of described rotating shaft end and by the housing of described rotor and described stator surrounding,
Described vibrationproof the cooling end of the side contrary with described tooth of component and described housing connect.
4. motor according to claim 1 and 2, is characterized in that,
This motor is switched reluctance motor.
5. a motor, is characterized in that, possesses:
There is the rotor of rotating shaft;
The circumference of described rotating shaft is surrounded the stator of described rotor;
Stay at least side of described rotating shaft end and by the housing of described rotor and described stator surrounding,
Described stator has and described rotor separates the interval of regulation and the stator core of surrounding this rotor in the circumferential direction, multiple teeth of extending from described stator core towards described rotor,
Each tooth has the vibrationproof cooling spring member be connected with described housing by this tooth respectively,
The end that described vibrationproof cooling spring member has with the rotor-side of described tooth carries out conjugating from initial position and produces elastic force, and by the shape that this elastic force exerts a force to the direction returning described initial position to the end of described rotor-side,
In each vibrationproof cooling spring member of described multiple tooth, there is the difference of spring constant.
6. motor according to claim 5, is characterized in that,
This motor is switched reluctance motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012117695A JP5759931B2 (en) | 2012-05-23 | 2012-05-23 | motor |
| JP2012-117695 | 2012-05-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103427505A CN103427505A (en) | 2013-12-04 |
| CN103427505B true CN103427505B (en) | 2015-10-21 |
Family
ID=49651861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310183100.8A Active CN103427505B (en) | 2012-05-23 | 2013-05-17 | Motor |
Country Status (2)
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|---|---|
| JP (1) | JP5759931B2 (en) |
| CN (1) | CN103427505B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1241773A2 (en) * | 2001-03-14 | 2002-09-18 | Nissan Motor Co., Ltd. | Rotating electrical machine with air-gap sleeve |
| CN101285482A (en) * | 2008-05-22 | 2008-10-15 | 永济新时速电机电器有限责任公司 | Electric motor fan |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4923374B2 (en) * | 2001-09-26 | 2012-04-25 | 日産自動車株式会社 | Stator structure of rotating electrical machine |
| US6933633B2 (en) * | 2001-10-03 | 2005-08-23 | Nissan Motor Co., Ltd. | Rotating electric machine and cooling structure for rotating electric machine |
| JP2010035354A (en) * | 2008-07-29 | 2010-02-12 | Nippon Densan Corp | Electric motor and disk drive unit |
-
2012
- 2012-05-23 JP JP2012117695A patent/JP5759931B2/en active Active
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2013
- 2013-05-17 CN CN201310183100.8A patent/CN103427505B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1241773A2 (en) * | 2001-03-14 | 2002-09-18 | Nissan Motor Co., Ltd. | Rotating electrical machine with air-gap sleeve |
| CN101285482A (en) * | 2008-05-22 | 2008-10-15 | 永济新时速电机电器有限责任公司 | Electric motor fan |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5759931B2 (en) | 2015-08-05 |
| JP2013247711A (en) | 2013-12-09 |
| CN103427505A (en) | 2013-12-04 |
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