CN105591498B - Closed electric rotating machine - Google Patents
Closed electric rotating machine Download PDFInfo
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- CN105591498B CN105591498B CN201510746394.XA CN201510746394A CN105591498B CN 105591498 B CN105591498 B CN 105591498B CN 201510746394 A CN201510746394 A CN 201510746394A CN 105591498 B CN105591498 B CN 105591498B
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Abstract
The present invention improves the cooling effectiveness in the cooler of closed electric rotating machine.Closed electric rotating machine (100) has：Rotor (10) with armature spindle (11) and rotor core (12)；Stator (20) with stator core (21) and stator coil (22)；Frame (30)；By the cooler (41) of multiple cooling tubes (42) parallel arranged, which cools down the circulation of fluid for being used for being cooled down to stator (20) and rotor core (12) using in pipe from exterior extraneous air；And the cooler (41) for being installed on frame (30) top is included, the cooler cover (43) connected by cooler entrance side opening (31) and cooler outlet side opening (32) with frame (30).Closed electric rotating machine (100), which has, to be installed on armature spindle (11) and makes the internal fan (15) and the top of cooler (41) is arranged in cooler cover (43) and the adjustment fan (61) of the rotating flow of circulation of fluid is generated around vertical axis that the circulation of fluid in frame (30) circulate.
Description
Technical field
The present invention relates to the closed electric rotating machine with internal fan and cooler.
Background technology
Closed electric rotating machine generally includes rotor, stator, cooler.In general, rotor have be pivoted armature spindle,
And it is arranged at the rotor core of the radial outside of the armature spindle.Stator has the cylinder for being laminated the steel plate of ferromagnetic vertically
The stator core of shape and the stator coil wound in the teeth portion for be formed at the stator core.
In load operation, copper loss is mainly produced in the stator coils, and iron loss is mainly produced in stator core.For this
Kind is generated heat, it is necessary to be cooled down to stator to protect stator coil etc. caused by the iron loss and copper loss produced in stator.
The cooler cover for including cooler is installed in the frame of storage rotor core and stator.Cooler cover and frame one
Rise and form confined space.In cooler, flowed from exterior cooling medium in the inner side of cooling tube, through cooling down medium cooling
The cooling gas outside cooling tube afterwards flows in confined space.The cooling gas such as air are by being installed on the internal fan of armature spindle
Drive and circulate (patent document 1) in confined space.
Prior art literature
Patent document
Patent document 1：Japanese Utility Model opens clear 61-149957 publications in fact
The content of the invention
The technical problems to be solved by the invention
Fig. 7 is the transverse sectional view at the part of the internal fan 15 of existing closed electric rotating machine.Fig. 8 is cooler
The vertical view cutaway drawing on 41 tops.Cooling gas in confined space 45 rotate because being installed on the internal fan 15 of armature spindle and by
Driving, is transferred to out of frame 30 in cooler cover 43.At this time, the gas driven by internal fan 15 is centered on shaft along week
To essentially symmetrically being flowed out from internal fan 15.
As a result, the velocity component from frame 30 to the direction of cooler cover 43 is uneven.Therefore, cooling tube 42 is flowed through
The VELOCITY DISTRIBUTION of cooling gas is also uneven, and heat exchange amount also produces distribution.This state can cause the cooling in cooler
Hydraulic performance decline.
The cooling performance in cooler it is an object of the invention to improve closed electric rotating machine.
Solve the technical solution of technical problem
In order to achieve the above object, closed electric rotating machine of the invention is characterized in that, including：Rotor, rotor tool
Have by can around horizontal-extending main shaft it is rotating in a manner of by pivot suspension and along major axes orientation extension armature spindle and be fixed on this
The radial outside of armature spindle and the rotor core extended along major axes orientation；Stator, the stator arrangement is in the footpath of the rotor core
Laterally, there is the stator core extended along major axes orientation and the stator coil for being wound in the stator core；Frame, the frame are received
Receive the rotor core and the stator；Cooler, the cooler is by multiple cooling tube parallel arrangeds, and the cooling tube is with to described
The circulation of fluid that the stator and the rotor core in frame are cooled down is as the outer cooled side liquid of pipe, with from outer
The extraneous air in portion extends as cooling side liquid in pipe along the direction of the main shaft；Cooler cover, cooler cover installation
In the top of the frame, confined space is formed together with the frame, includes the cooler, is opened by cooler entrance side
Mouth and cooler outlet side opening are connected with the frame, which is arranged at the direction for including the main shaft
An end region lower section to be flowed into out of described frame, which is arranged at comprising the main shaft
Direction the other end region lower section to flow out in the frame；Internal fan, the internal fan are installed on described
The armature spindle of part on the outside of the major axes orientation of cooler entrance side opening lower side, described rotor core, makes described
Circulation of fluid circulates in the confined space；And adjustment fan, the adjustment fan are arranged at described in the cooler cover
The top of cooler, the rotating flow of the circulation of fluid is generated around vertical axis.
Invention effect
According to the present invention, the cooling performance in the cooler of closed electric rotating machine can be improved.
Brief description of the drawings
Fig. 1 is the longitudinal sectional view of the closed electric rotating machine of embodiment 1.
Fig. 2 is the II-II lines of Fig. 1 to regarding transverse sectional view.
Fig. 3 is the III-III lines of Fig. 1 to regarding vertical view cutaway drawing.
Fig. 4 is the longitudinal sectional view of the closed electric rotating machine of embodiment 2.
Fig. 5 is the V-V lines of Fig. 4 to regarding transverse sectional view.
Fig. 6 is the line VI -- VI of Fig. 4 to regarding vertical view cutaway drawing.
Fig. 7 is the transverse sectional view of the part of the internal fan of existing closed electric rotating machine.
Fig. 8 is the vertical view cutaway drawing on the cooler top of existing closed electric rotating machine.
Embodiment
Hereinafter, it is explained with reference to the closed electric rotating machine of embodiments of the present invention.Herein, to mutually it is identical or
Similar part adds common label, and omits repeat specification.
[embodiment 1]
Fig. 1 is the longitudinal sectional view of the closed electric rotating machine of embodiment 1.Fig. 2 is the II-II lines of Fig. 1 to regarding transverse direction
Sectional view.Fig. 3 is the III-III lines of Fig. 1 to regarding vertical view cutaway drawing.
Closed electric rotating machine 100 has rotor 10, stator 20, frame 30, the support of bearing 36, cooler 41 and stores cold
But the cooler cover 43 of device 41.Rotor 10 have in a manner of it can rotate around the spindle by pivot suspension and prolong horizontal direction extension
Armature spindle 11 and be arranged at armature spindle 11 radial outside rotor core 12.Stator 20, which has, is arranged at rotor core 12
The cylindric stator core 21 of radial outside and the groove portion setting being formed on the surface of stator core 21 edge on major axes orientation
Stator coil 22.Rotor core 12 and stator 20 are accommodated in frame 30.
Armature spindle 11 is supported by bearing 35 respectively in two outsides of the major axes orientation of rotor core 12.Bearing 35 is consolidated
Determine portion side and supporting is fixed by the support of bearing 36 respectively.Supporting is fixed by frame 30 in the support of bearing 36.In frame 30
Upper load has cooler cover 43.Frame 30, the support of bearing 36 of both sides and cooler cover 43 form confined space 45.Frame 30
Interior atmosphere is connected in cooler entrance side opening 31 and cooler outlet side opening 32 each other with the atmosphere in cooler cover 43.
Cooler 41 has more cooling tubes 42.Each cooling tube 42 extends along major axes orientation in parallel with each other.Each cooling tube
42 link at both ends and cooler cover 43, and the inside facing outward portion of cooling tube 42 opens.The outside of cooling tube 42 passes through weldering at both ends
Connect and engaged with cooler cover 43.The outside of cooling tube 42 is a part for confined space 45, and cooling tube 42 is composition confined air
Between 45 partial element.
In the outside of frame 30, external fan 44 is installed on armature spindle 11.Exterior wing cover in the suction side of external fan 44
44a is provided with suction inlet (not shown).External fan 44 is from being formed at the suction inlet of exterior wing cover 44a by the air of outside atmosphere i.e.
Extraneous air sucks, and the extraneous air of suction is sent in the pipe of cooling tube 42.External fan 44a becomes the outside of suction
Guiding piece of the air untill 42 entrance of cooling tube.The extraneous air in each cooling tube 42 is flowed into flowing through outside cooling tube 42
After being cooled down in the heat exchange of the circulation of fluid (such as air) of side to circulation of fluid, released from 42 end of cooling tube.
Herein, circulation of fluid is the cooling gas of the circulation in confined space 45.
One in the rotor core 12 of armature spindle 11 axially external is provided with internal fan 15.In the radial direction of interior fan 15
Surrounding is provided with demarcation strip 37a.Space in frame 30 is divided into suction side and the discharge of internal fan 15 by demarcation strip 37a
Side.In addition, clipping demarcation strip 37a and rotor core 12 is provided with demarcation strip 37b in axially opposite side, the space in rotor is drawn
It is divided into core side and its outside.
Internal fan 15 is rotated together with the rotation of armature spindle 11, the circulation in the space of 12 side of suction rotor core
Fluid, and discharge it on the outside of major axes orientation.The circulation of fluid is via cooler entrance 31 sky out of frame 30 of side opening
Between be transmitted to space in cooler cover 43.The circulation of fluid in the space being transmitted in cooler cover 43 passes through in cooler 41
After the outside of cooling tube 42 and cooling, frame is transmitted to via space of the cooler outlet side opening 32 out of cooler cover 43
In 30.The circulation of fluid that is transmitted in frame 30 flows into rotor core 12 and stator 20 and they is cooled down and then secondary
It is flowed into internal fan 15.
Adjustment fan 61 is provided with the space above cooler 41.Adjustment fan 61 is arranged on the length from cooling tube 42
The center of edge direction is close to the position of the cooler entrance side opening 31 of major axes orientation.Adjustment fan 61 is fixedly supported upon cooler
The upper surface of cover 43, rotates around vertical axis.The direction of rotation of adjustment fan 61 (with reference to Fig. 3) viewed from above is counterclockwise
Rotation, the direction of rotation i.e. rotation clockwise of (with reference to Fig. 2) of the internal fan 15 observed with the opposite side from rotor core 12
Switch to opposite direction.It is rotation counterclockwise alternatively, it is also possible to internal fan 15, adjustment fan 61 is to rotate clockwise.
Next, the effect of the closed electric rotating machine of the present embodiment more than explanation formed like that.From internal fan
15 flow out to the circulation of fluid in the space of 12 opposite side of rotor core out of this space via cooler entrance side opening 31
The space being flowed into cooler cover 43.
As shown in Fig. 2, consider in the axial direction from the opposite side of rotor core 12 (Fig. 1) during internal fan 15, it is internal
The situation that fan 15 is rotated in a clockwise direction.Flowed out to by the circulation of fluid of internal fan 15 by radial component and rotation side
Direction after being synthesized to component.The outflow and velocity flow profile during by cooler entrance side opening 31 is subject to inside out of this space
The influence of the direction of rotation of fan 15, it is therefore, uneven.Flow velocity when i.e., by cooler entrance side opening 31 is from inside
Compare opposite side in the position of the outflow direction of fan 15 towards the side (being left side in Fig. 2) in the direction of cooler entrance side opening 31
Position (being right side in Fig. 2) will height.
As shown in figure 3, by cooler entrance side opening 31 be flowed into the circulation of fluid of cooler 41 similarly with row
The direction vertical into direction has VELOCITY DISTRIBUTION.Herein, the air-flow of circulation of fluid is in cooler 41 in cooler cover 43
The air-flow of major axes orientation is essentially in the flow path in the outside of cooling tube 42 and the space of the top of cooler 41.
The air-flow by adjusting fan 61 around.During adjustment fan 61 viewed from above, adjustment fan 61 is around counterclockwise
Rotation.By the rotation, the air flow component of generation direction of rotation counterclockwise around adjustment fan 61.This is counterclockwise direction of rotation
Circulation of fluid air flow component towards the circulation of fluid to being flowed into cooler 41 by cooler entrance side opening 31 flow
The uneven direction work relaxed of distribution.As a result, the periphery than adjustment fan 61 will be located at the circulation of fluid in downstream
Uneven in the VELOCITY DISTRIBUTION in the direction vertical with major axes orientation of air-flow be reduced.
Therefore, cause to flow through extraneous air inside cooling tube 42 with flowing through following outside cooling tube 42 because flow velocity is relatively low
Heat exchange amount between circulation body is relatively low, so that the overall relatively low state of cooling effectiveness of cooling body 41 is improved, cooling effect
Rate improves.
As described above, according to the present embodiment, the cooling effect in the cooler 41 of closed electric rotating machine 100 can be improved
Rate.
[embodiment 2]
Fig. 4 is the longitudinal sectional view of the closed electric rotating machine of embodiment 2.Fig. 5 is the V-V lines of Fig. 4 to depending on laterally cuing open
View.Fig. 6 is the line VI -- VI of Fig. 4 to regarding vertical view cutaway drawing.
Present embodiment is the deformation of embodiment 1.In present embodiment 2,2 adjustment fans 62a, 62b are provided with.Adjust
Rectification campaign fan 62a and adjustment fan 62b are arranged side-by-side each other in the horizontal direction vertical with main shaft.Adjustment fan viewed from above
Direction of rotation (the figure for the internal fan 15 that direction of rotation (Fig. 6) when 62a, 62b is observed with the opposite side from rotor core 12
5) it is opposite direction.
At present, the direction of rotation and embodiment 1 when considering the internal fan 15 from the opposite side of rotor core 12 are same
Sample is situation about rotating clockwise.In the case, direction of rotation during adjustment fan 62a, 62b viewed from above is counterclockwise
Rotation.
In the horizontal direction vertical with main shaft, cooling tube 42a and two groups of cooling tube 42b is divided into.The group of cooling tube 42a
To configure the group below adjustment fan 62a.Group of the group of cooling tube 42b for configuration below adjustment fan 62b.Utilize adjustment
The direction of rotation of the direction of rotation of fan 62a and internal fan 15 is the effect of opposite side, by adjusting the region of fan 62a
Distribution of the flow velocity of circulation of fluid on the direction vertical with major axes orientation becomes uniform.In addition, utilize the rotation for adjusting fan 62b
Direction and the effect that the direction of rotation of internal fan 15 is opposite side, by adjusting the stream of the circulation of fluid in the region of fan 62b
Distribution of the speed on the direction vertical with major axes orientation becomes uniform.
The mutual mutual spacing of gap ratio cooling tube 42a of cooling tube 42b is big.That is, the recycle stream on the outside of cooling tube 42b
The flow velocity of body is bigger than the flow velocity of the circulation of fluid on the outside of cooling tube 42a compared with small because of the flow resistance of flow path.
It is the pyroconductivity λ of heet transfer rate hi, cooling tube on the inside of the overall heat-transfer coefficient U of the radial direction of cooling tube, cooling tube, cold
But the heet transfer rate ho on the outside of pipe has the relation of following formula (1).Wherein, t is the thickness of cooling tube.
1/U=1/hi+t/ λ+1/ho (1)
Herein, the fluid inside and outside cooling tube is gas, therefore, the thermal resistance amount of the pyroconductivity for the cooling tube that the right is the 2nd
Compared with the 1st and the 3rd, it can generally ignore.Herein, in the case of forced convertion, heet transfer rate generally for example with stream
0.5 to 0.8 power of speed or so is proportional.Therefore, following on the outside of the velocity ratio cooling tube of the extraneous air on the inside of cooling tube
In the case that the flow velocity of circulation body wants sufficiently large, the heet transfer rate hi of inner side is more sufficiently large than the heet transfer rate ho in outside.Therefore,
The thermal resistance amount of respective i.e. inner side reciprocal is smaller than the thermal resistance amount in outside.
, can be with as described above, if the flow velocity of the circulation of fluid on the outside of the velocity ratio of the extraneous air of inner side is sufficiently large
Say that 1/U is substantially equal to 1/ho, i.e. the hot percent of pass U of radial direction is substantially equal to the heet transfer rate ho in outside.That is, the heat of cooling tube is led to
The rate U of mistake is determined by the flow velocity on the outside of cooling tube substantially.The flow velocity of circulation of fluid on the outside of cooling tube 42b is more than cooling tube 42a
The flow velocity of the circulation of fluid in outside, therefore, will than the overall heat-transfer coefficient in cooling tube 42a in the overall heat-transfer coefficient of cooling tube 42b
Greatly.
The heat exchange amount between the circulation of fluid outside extraneous air and cooling tube 42b in cooling tube 42b in cooling tube 42b
Temperature and flow velocity, the temperature of circulation of fluid and the heat transfer area of flow velocity and cooling tube 42b dependent on extraneous air.Due to upper
The difference of spacing is stated, the heat transfer area entirely organized of cooling tube 42b is less than the heat transfer area entirely organized of cooling tube 42a.It is another
Aspect, the flow velocity of the circulation of fluid outside cooling tube 42b are more than the flow velocity of the circulation of fluid outside cooling tube 42a, therefore, cooling tube
Heet transfer rate on the outside of 42b is more than the heet transfer rate on the outside of cooling tube 42a.
As described above, cooling tube 42b, compared with cooling tube 42a, heat transfer area diminishes, but the heet transfer rate in outside becomes larger,
In terms of comprehensive, the heat exchange amount of the group of cooling tube 42b and the heat exchange amount of the group of cooling tube 42a are of substantially equal.
As described above, in the closed electric rotating machine of present embodiment, the heat friendship in cooler 41 can be further eliminated
The distribution bias for the amount of changing and average, so as to can ensure that cooling performance.
In addition, the deformation as present embodiment, can also replace expansion cold by reducing the tube diameter of cooling tube 42b
But the group spacing of pipe 42b, to try hard to reduce the pressure loss of the circulation of fluid on the outside of cooling tube 42b.By cooling tube 42a and cold
But the extraneous air of the respective inner sides of pipe 42b is provided by external fan 44.Therefore, it is outer on the inside of cooling tube 42a and cooling tube 42b
Flow velocity of the flow velocity of portion's air generally than the circulation of fluid on the outside of cooling tube 42a and cooling tube 42b is sufficiently large.
Therefore, by being set to following relation：So that the hot percent of pass U because caused by accelerating the flow velocity on the outside of cooling tube
Increase and the reduction of heat transfer area because caused by reducing the diameter of cooling tube 42b is compensated, so as to obtain and embodiment party
The same effect of formula 2.
[other embodiment]
More than, although the description of embodiments of the present invention, but embodiment is intended only as example and presents, and does not really want
Invention scope is defined.In addition, embodiment can be implemented by other various modes, invention main points are not being departed from
In the range of, various omissions, displacement, change can be carried out.Embodiment and its deformation are same in the scope and main points of invention with being included in
In the invention being included in described in claims and its scope of equalization sample.
Label declaration
10 rotors
11 armature spindles
12 rotor cores
15 internal fans
20 stators
21 stator cores
22 stator coils
30 frames
31 cooler entrance side openings
32 cooler outlet side openings
35 bearings
36 supports of bearing
37a, 37b demarcation strip
41 coolers
42nd, 42a, 42b cooling tube
43 cooler covers
44 external fans
44a exterior wing covers
45 confined spaces
61st, 62a, 62b adjust fan
100 closed electric rotating machines
Claims (2)
- A kind of 1. closed electric rotating machine, it is characterised in that including：Rotor, the rotor have by can around horizontal-extending main shaft it is rotating in a manner of by pivot suspension and along major axes orientation extension Armature spindle and be fixed on the armature spindle radial outside and along major axes orientation extend rotor core；Stator, the stator arrangement have the stator core along major axes orientation extension and volume in the radial outside of the rotor core It is around in the stator coil of the stator core；Frame, the frame store the rotor core and the stator；Cooler, the cooler is by multiple cooling tube parallel arrangeds, and the cooling tube is with to the stator in the frame and institute Circulation of fluid that rotor core cooled down is stated as the outer cooled side liquid of pipe, using from exterior extraneous air as in pipe Side liquid is cooled down, and is extended along the direction of the main shaft；Cooler cover, the cooler cover are installed on the top of the frame, and confined space is formed together with the frame, include institute Cooler is stated, is connected by cooler entrance side opening and cooler outlet side opening with the frame, the cooler entrance side Opening is arranged at one of the direction of the main shaft of cooler to make the circulation of fluid be flowed into out of described frame The lower section in the region that end is included, the cooler outlet side opening is in order to make the circulation of fluid flow out in the frame And it is arranged at the lower section in the region for being included the other end in the direction of the main shaft；Internal fan, the internal fan are installed on the main shaft of the cooler entrance side opening lower side, described rotor core The armature spindle of part on the outside of direction, makes the circulation of fluid be circulated in the confined space；AndFan is adjusted, which is arranged at the top of the cooler in the cooler cover, and institute is generated around vertical axis The rotating flow of circulation of fluid is stated, so that the VELOCITY DISTRIBUTION of the circulation of fluid is uniform,Described in the direction of rotation of the adjustment fan viewed from above is observed with the opposite side from the rotor core The direction of rotation of internal fan is opposite direction.
- 2. closed electric rotating machine as claimed in claim 1, it is characterised in thatThe adjustment fan is provided with multiple, and the adjustment fan is respectively along the direction vertical with the long side direction of the cooling tube Arrangement,The cooling tube is being divided into the group of the cooling tube set in the lower section for the position for being respectively arranged with the adjustment fan When, the pressure loss that the group of cooling tube adjacent to each other is formed as the circulation of fluid each other reduces successively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014226337A JP6068419B2 (en) | 2014-11-06 | 2014-11-06 | Fully closed rotating electrical machine |
| JP2014-226337 | 2014-11-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105591498A CN105591498A (en) | 2016-05-18 |
| CN105591498B true CN105591498B (en) | 2018-04-27 |
Family
ID=55930825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510746394.XA Active CN105591498B (en) | 2014-11-06 | 2015-11-05 | Closed electric rotating machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6068419B2 (en) |
| CN (1) | CN105591498B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451917B (en) * | 2016-11-30 | 2023-04-21 | 北京三一智能电机有限公司 | Generator and wind power plant |
| JP6586441B2 (en) * | 2017-07-18 | 2019-10-02 | 東芝三菱電機産業システム株式会社 | Fully enclosed outer fan-type rotating electric machine and variable ventilation outer fan duct |
| JP7034801B2 (en) * | 2018-03-29 | 2022-03-14 | 住友重機械工業株式会社 | Injection molding machine |
| JP6983136B2 (en) * | 2018-10-15 | 2021-12-17 | 東芝三菱電機産業システム株式会社 | Fully enclosed fan-shaped rotary electric machine and outside air fan set |
| JP2020129897A (en) * | 2019-02-08 | 2020-08-27 | 東芝三菱電機産業システム株式会社 | Totally-enclosed fan-cooled type rotary electric machine and external fan cover |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1738159A (en) * | 2004-08-20 | 2006-02-22 | 东芝三菱电机产业***株式会社 | Full-closed external fan type rotating electrical machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5579667U (en) * | 1978-11-24 | 1980-06-02 | ||
| JPS6117863U (en) * | 1984-07-09 | 1986-02-01 | 株式会社東芝 | Cooling device for rotating electrical machines |
| JPS61149957U (en) * | 1985-03-11 | 1986-09-16 | ||
| EP1182764A1 (en) * | 2000-08-23 | 2002-02-27 | ABB Industrie AG | Cooling of high speed electrical machine |
| EP1447899A1 (en) * | 2003-02-13 | 2004-08-18 | Loher GmbH | Dynamoelectric machine |
| JP2004254438A (en) * | 2003-02-20 | 2004-09-09 | Toshiba Corp | Totally-enclosed fan-cooled rotary electric machine |
| US8167585B2 (en) * | 2006-09-28 | 2012-05-01 | Siemens Industry, Inc. | Devices and/or systems for mounting an auxiliary blower |
-
2014
- 2014-11-06 JP JP2014226337A patent/JP6068419B2/en active Active
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2015
- 2015-11-05 CN CN201510746394.XA patent/CN105591498B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1738159A (en) * | 2004-08-20 | 2006-02-22 | 东芝三菱电机产业***株式会社 | Full-closed external fan type rotating electrical machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6068419B2 (en) | 2017-01-25 |
| JP2016093014A (en) | 2016-05-23 |
| CN105591498A (en) | 2016-05-18 |
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