CA1253560A - Axial locking of amortisseur bars - Google Patents
Axial locking of amortisseur barsInfo
- Publication number
- CA1253560A CA1253560A CA000506429A CA506429A CA1253560A CA 1253560 A CA1253560 A CA 1253560A CA 000506429 A CA000506429 A CA 000506429A CA 506429 A CA506429 A CA 506429A CA 1253560 A CA1253560 A CA 1253560A
- Authority
- CA
- Canada
- Prior art keywords
- rotor
- bars
- amortisseur
- ferrule
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
- H02K3/20—Windings for salient poles for auxiliary purposes, e.g. damping or commutating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
AXIAL LOCKING OF AMORTISSEUR BARS
Abstract of the Disclosure A rotor for a dynamoelectric Machine, such as a synchronous motor, has a plurality of poles with a number of amortisseur bars per pole. In the past the amortisseur bars were assembled in the wound rotor, and the bars locked against axial movement by brazing a ferrule on both ends of a plurality of bars spaced around the rotor. The ferrules were closely adjacent the respective rotor side and there is a danger that the heat of the brazing operation will damage the windings. according to the present disclosure, for each pole at least two amortisseur bars have a single ferrule brazed on one end of the bar at a respective predetermined distance from the end of the bar. The distance is such that one bar is inserted into the rotor from one side of the rotor to a final position where the ferrule is adjacent the rotor on that side, and the other bar is inserted into the rotor from the other side of the rotor to a final position where the ferrule is adjacent the rotor on that other side. After all the amortisseur bars are inserted, an end ring is brazed or welded to the protruding ends of the bars on each side of the rotor and this will prevent axial movement of all the bars.
Abstract of the Disclosure A rotor for a dynamoelectric Machine, such as a synchronous motor, has a plurality of poles with a number of amortisseur bars per pole. In the past the amortisseur bars were assembled in the wound rotor, and the bars locked against axial movement by brazing a ferrule on both ends of a plurality of bars spaced around the rotor. The ferrules were closely adjacent the respective rotor side and there is a danger that the heat of the brazing operation will damage the windings. according to the present disclosure, for each pole at least two amortisseur bars have a single ferrule brazed on one end of the bar at a respective predetermined distance from the end of the bar. The distance is such that one bar is inserted into the rotor from one side of the rotor to a final position where the ferrule is adjacent the rotor on that side, and the other bar is inserted into the rotor from the other side of the rotor to a final position where the ferrule is adjacent the rotor on that other side. After all the amortisseur bars are inserted, an end ring is brazed or welded to the protruding ends of the bars on each side of the rotor and this will prevent axial movement of all the bars.
Description
S~3 C~SE 2958 AXI~L LOCKING OF AMORTISSEUR BA~;
This invention relates to a method for the axial locking of amortisseur bars, to a method of assembling the bars into a rotor, and to apparatus having such axially locked bars.
Background of the Invention In the assembly of a rotor for a synchronous motor, it has been common practice to assemble the field windings on the rotor and subsequently to insert the amortisseur bars. r~he amortisseur bars are then locked against axial movement by brazirlg a ferrule to at least the centre bar or centrally located bars of each pole, adjacent the rotor, at each end of the bar. When the bars are brazed to the amortisseur ring lS or end ring on each side of the rotor, all the bars are locked against axial movement.
Because the ferrules are closely adjacent to the rotor, it is possible to damage the field windings by the brazing which takes place in the immediate vicinity.
Summary of the Invention When a rotor is assembled according to the invention, for each pole there is a ferrule brazed to one end of one bar and to the other end of at least one other bar before assembly~ r~he amortisseur bars ~3~
l'Z~
CAS~ 2958 are then lnserted and the bars having ferrules are inserted Erorn opposite sides so that for each pole there is at least one ferrule adjacent the rotor at each side of the rotor. The end rings are subsequently brazed to the ends of the amortisseur bars which locks all bars against axial movernent.
It is therefore an object of the invention to provide a method for axially locking amortisseur bars without endangering winding insulation which could occur when bra~ing ferrules to each end of bars in situ.
It is another object of the invention to provide an improved method for assembliny amortisseur bars into a rotor of a d~namoelectric machine which 1~ provides axial lockiny of the bars.
Accordinyly there is provided in a dynamvelectric machine haviny a rotor with a plurality of poles, an imprvved method ~or assembling amortisseur bars in said rotor to prevent axial movement of said bars, cornprising the steps of assembling a rotor core having first and second sides, installing rotor windings on said core, selecting at least two amortisseur bars for each pole of said rotor, fixedly mounting on each selected bar a single 2S ferrule at a respective predetermined distance from the end of the respective bar, said predetermined distance being such that when one of said bars i9 inserted into said rotor from said first side to its final position the ferrule will be adjacent said first side of said rotor, and when the other of said bars is inserted into said rotor from said second side to its final position the ferrule will be adjacent said second side of said rotor, inserting said amortissuer bars into said rotor, and fastening the protruding ends of said amortisseur bars on said first side to a ~ 3 --first end ring and fastening the protruding ends of said arnortisseur bars on said second side to a second end ring.
There is also provided a dynamoelectric S machine having a rotor with a plurality of poles and rotor windings on said rotor, comprising a plurality of amortisseur bars for each pole of said rotor, at least two of said amortisseur bars per pole havilly a respective single ferrule fixedly rnounted thereto lU prior to assembly of said bars in said rotor, said ferrules being a respective predetermined distance from an end of said rotor whereby one of said at least two amortisseur bars when inserted in said rotor has the respective ferrule thereon adjacent one side of said rotor and another of said at least two amortisseur bars when inserted in said rotor has the respective ferrule thereon adjacent the other side OL`
said rotor, and an end riny for each side of said rotor fixedly rnounted to the protruding ends of said amortisseur bars on the respective side of said rotor.
~rief_Description of the_Drawin~s Figure 1 is an isometric view of a rotor having amortisseur bars~
Figures 2 and 3 are schematic views looking dvwn on the pole face of a rotor and showing two arrangernents according to the invention, Figures 4, 5 and 6 are partial sectional views showing a section through an amortisseur bar and end ring showing three different forms of ferrule, and : 30 Figure 7 is a sectional view taken along line l-7 of Figure 6.
Description of the Preferred Embodinents Referring to Figure 1 there is showrl an isometric drawing of a rotor 10 for a synchronous ; 35 motor havin~ a plurality of poles 11 with a plurality 5~
of amortisseur bars 12 secured to an end ring 14. In the assembly of rotor 10 in the past it has been the practice to insert amortisseur bars 1~ which then project on either side of the pole through which they are mounted. A ferrule or ring, just slightly larger than the amortisseur bar is then slipped on both ends of each bar which has been designated to provide axial locking and the ferrules placed adjacent the pole.
This places the ferrule in the vicinity of the rotor windillgs 15. The ferrules are then brazed or welded to the respective amortisseur bar. This brazing or welding could subject the rotor windings to undue héat. When the ferrules are fastened, the end rings 14 are brazed or weldéd to the ends of the lS amortisseur bars 12. The end rings are normally spaced outwardly of the po~es and their windirlg~ and conse~uently this braziny or weldiny operation iY
unlikely to damage the windings.
Figure 2 shows a view looking down OlltO a pole face 16. Seven amortisseur bars 12A - 12~ exter~d through the pole and are fastened to end rings 14 and 14A. Eerrules 17 and 18 are brazed or welde~ to a respective amortisseur bar so that they are adjacent a respective side 20 and 21 of pole 11 having pole face 16 as designated, this is done before the arnortisseur bars are inserted into the poles. Where there are an odd number of amortisseur bars, this arrangement is convenient. There may, of cour~e, be more than two amortisseur bars which have a ferrule attached.
~ uring the assembly of a rotor, after t}le rotor windings are in place, ferrule 17 is brazed or welded to amortisseur bar 12E in the position shown, and ferrule 18 is brazed or welded to amortisseur bar 12C in the position shown. This brazing or ~2S3S~i~
~ ASE 2958 welding of the ferrules to the respective amortisseur bars is done before the bars are inserted into their pole so that there i5 no danger of the windings beiny heated by the brazing or welding. The arnortisseur bars are then inserted. The amortisseur bar 12E is inserted from side 20, an~ the amortisseur bar 12C is inserted from side 21. The bars 12~, 12B, 12D, 12F
and 12G may be inserted from either side 20 or side 21 as convenient. The amortisseur bars are subsequently brazed or welded to end ring 14 and 14A. Once this is done, all the amortisseur bars 12 are locked or secured against axial movement.
Referring now to Figure 3, four amortissuer bars 12H - 12K extend through a pole having a pole face 16A. Amortisseur bars 12I and 12J have Eerrules 17A and 18A brazed or welded thereto, respectively. This arrangement illustrates an even number of amortisseur bars per pole. There may, o~
course, be three or four of the amortisseur bars with a respective ferrule.
During assembly, as before, ferrules 17A
and 18~ are brazed or welded to bars 12J and 12I, respectively, before the amortisseur bars are inserted into their pole. The bars are then inserted, bar 12J
from side 20 and bar 12I from side 21, until the ferrules are adjacent the respective side of the pole. The bars without a ferrule may be inserted from either side. The ends of amortisseur bars 12~ - 12K
are subsequently brazed or welded to a respective end ring 14 or 14A.
Figure 4 is a sectional view taken through part of the rotor core 22 forming a pole with a pole face 16. An amortisseur bar 23 has a ferrule 24 brazed or welded to it. Ferrule 24 is in the form of a ring whose opening conEorms to the outside of bar 23 ~S35~;0 C~ 2958 and is slightly larger so that it will slip over bar 23. It is preferable to do the brazing or welding of the ferrule to the respective bar on the side that will be remote from the side of the pole so that the ferrule will butt flatly against the side of the pole to prevent axial movement. The end of the bar 23 is brazed or welded to end ring 14 after all the amortisseur bars are installed.
Figure 5 is a sectional view taken through part of a rotor core 22 and is similar to Figure 4 except that a different form of ferrule is used.
Ferrule 25 of Figure 5 has a hole 26 drilled through the ferrule to provide a convenient passaye for providiny an improved weld. The welding of t~le ferrule to the bar is done in the region of hole 26.
If desired, more than two holes 26 could be used, or alternately one hole 26 could be used. It has been found that two opposed holes, as shown, provide a satisfactory weld.
~eferring to Figures 6 and 7, yet another form of fastener is shown. The fastener in Fiyures 6 and 7 is not in the forln of a ring, however, f~r convenience it is referred to as a ferrule and it is intended that "ferrule" will include this. The ferrule of Figures 6 and 7 is a rectangular metal piece 27 and 28 brazed or welded on opposite sides of amortisseur bar 30 which has a generally oblong cross-section. Some caution must be used when braziny or welding the ferrule pieces 27 and 28 to bar 3~ to avoid getting the brazing material or weldiny material on the edges adjacent the pole side because axial moveJnent of the bar might then cause sorne distortion when the uneven material butts against the side of the pole. The terminating edyes 31 of the pair o~
pieces 27 and 28 are direc-tly opposite one arlother, ~2S3~G~
that is they are aligned with one another.
Various other forms of ferrule may be used, but whatever form of ferrule is used it is brazed or welded or otherwise fastened to an amortisseur bar at a predetermined distance from one end of the bar so that after the bar is inserted in a pole on the rotor and is positioned in its final or operatiny position, the ferrule will be closely adjacent a side of the respective pole. It is preferable that for each pole at least two amortisseur bars will have ferrules fastened thereto, one per bar, at predetermined distance from an end of the bar so that after the bars are installed the ferrules will be adjacent op~osite sides of the pole. When the bars are subsequently brazed or welded or otherwise fastened to an end ring at each end, the bars will all be secured against axial movement. While it is preferable that at least two bars per pole should have ferrules, the actual number will depend on the size of the rotor and the number of poles on the rotor. Preferably the bars having a ferrule thereon are equally spaced on either side of the pole center.
It is believed the description provided will give a satisfactory understanding of the inventionO
This invention relates to a method for the axial locking of amortisseur bars, to a method of assembling the bars into a rotor, and to apparatus having such axially locked bars.
Background of the Invention In the assembly of a rotor for a synchronous motor, it has been common practice to assemble the field windings on the rotor and subsequently to insert the amortisseur bars. r~he amortisseur bars are then locked against axial movement by brazirlg a ferrule to at least the centre bar or centrally located bars of each pole, adjacent the rotor, at each end of the bar. When the bars are brazed to the amortisseur ring lS or end ring on each side of the rotor, all the bars are locked against axial movement.
Because the ferrules are closely adjacent to the rotor, it is possible to damage the field windings by the brazing which takes place in the immediate vicinity.
Summary of the Invention When a rotor is assembled according to the invention, for each pole there is a ferrule brazed to one end of one bar and to the other end of at least one other bar before assembly~ r~he amortisseur bars ~3~
l'Z~
CAS~ 2958 are then lnserted and the bars having ferrules are inserted Erorn opposite sides so that for each pole there is at least one ferrule adjacent the rotor at each side of the rotor. The end rings are subsequently brazed to the ends of the amortisseur bars which locks all bars against axial movernent.
It is therefore an object of the invention to provide a method for axially locking amortisseur bars without endangering winding insulation which could occur when bra~ing ferrules to each end of bars in situ.
It is another object of the invention to provide an improved method for assembliny amortisseur bars into a rotor of a d~namoelectric machine which 1~ provides axial lockiny of the bars.
Accordinyly there is provided in a dynamvelectric machine haviny a rotor with a plurality of poles, an imprvved method ~or assembling amortisseur bars in said rotor to prevent axial movement of said bars, cornprising the steps of assembling a rotor core having first and second sides, installing rotor windings on said core, selecting at least two amortisseur bars for each pole of said rotor, fixedly mounting on each selected bar a single 2S ferrule at a respective predetermined distance from the end of the respective bar, said predetermined distance being such that when one of said bars i9 inserted into said rotor from said first side to its final position the ferrule will be adjacent said first side of said rotor, and when the other of said bars is inserted into said rotor from said second side to its final position the ferrule will be adjacent said second side of said rotor, inserting said amortissuer bars into said rotor, and fastening the protruding ends of said amortisseur bars on said first side to a ~ 3 --first end ring and fastening the protruding ends of said arnortisseur bars on said second side to a second end ring.
There is also provided a dynamoelectric S machine having a rotor with a plurality of poles and rotor windings on said rotor, comprising a plurality of amortisseur bars for each pole of said rotor, at least two of said amortisseur bars per pole havilly a respective single ferrule fixedly rnounted thereto lU prior to assembly of said bars in said rotor, said ferrules being a respective predetermined distance from an end of said rotor whereby one of said at least two amortisseur bars when inserted in said rotor has the respective ferrule thereon adjacent one side of said rotor and another of said at least two amortisseur bars when inserted in said rotor has the respective ferrule thereon adjacent the other side OL`
said rotor, and an end riny for each side of said rotor fixedly rnounted to the protruding ends of said amortisseur bars on the respective side of said rotor.
~rief_Description of the_Drawin~s Figure 1 is an isometric view of a rotor having amortisseur bars~
Figures 2 and 3 are schematic views looking dvwn on the pole face of a rotor and showing two arrangernents according to the invention, Figures 4, 5 and 6 are partial sectional views showing a section through an amortisseur bar and end ring showing three different forms of ferrule, and : 30 Figure 7 is a sectional view taken along line l-7 of Figure 6.
Description of the Preferred Embodinents Referring to Figure 1 there is showrl an isometric drawing of a rotor 10 for a synchronous ; 35 motor havin~ a plurality of poles 11 with a plurality 5~
of amortisseur bars 12 secured to an end ring 14. In the assembly of rotor 10 in the past it has been the practice to insert amortisseur bars 1~ which then project on either side of the pole through which they are mounted. A ferrule or ring, just slightly larger than the amortisseur bar is then slipped on both ends of each bar which has been designated to provide axial locking and the ferrules placed adjacent the pole.
This places the ferrule in the vicinity of the rotor windillgs 15. The ferrules are then brazed or welded to the respective amortisseur bar. This brazing or welding could subject the rotor windings to undue héat. When the ferrules are fastened, the end rings 14 are brazed or weldéd to the ends of the lS amortisseur bars 12. The end rings are normally spaced outwardly of the po~es and their windirlg~ and conse~uently this braziny or weldiny operation iY
unlikely to damage the windings.
Figure 2 shows a view looking down OlltO a pole face 16. Seven amortisseur bars 12A - 12~ exter~d through the pole and are fastened to end rings 14 and 14A. Eerrules 17 and 18 are brazed or welde~ to a respective amortisseur bar so that they are adjacent a respective side 20 and 21 of pole 11 having pole face 16 as designated, this is done before the arnortisseur bars are inserted into the poles. Where there are an odd number of amortisseur bars, this arrangement is convenient. There may, of cour~e, be more than two amortisseur bars which have a ferrule attached.
~ uring the assembly of a rotor, after t}le rotor windings are in place, ferrule 17 is brazed or welded to amortisseur bar 12E in the position shown, and ferrule 18 is brazed or welded to amortisseur bar 12C in the position shown. This brazing or ~2S3S~i~
~ ASE 2958 welding of the ferrules to the respective amortisseur bars is done before the bars are inserted into their pole so that there i5 no danger of the windings beiny heated by the brazing or welding. The arnortisseur bars are then inserted. The amortisseur bar 12E is inserted from side 20, an~ the amortisseur bar 12C is inserted from side 21. The bars 12~, 12B, 12D, 12F
and 12G may be inserted from either side 20 or side 21 as convenient. The amortisseur bars are subsequently brazed or welded to end ring 14 and 14A. Once this is done, all the amortisseur bars 12 are locked or secured against axial movement.
Referring now to Figure 3, four amortissuer bars 12H - 12K extend through a pole having a pole face 16A. Amortisseur bars 12I and 12J have Eerrules 17A and 18A brazed or welded thereto, respectively. This arrangement illustrates an even number of amortisseur bars per pole. There may, o~
course, be three or four of the amortisseur bars with a respective ferrule.
During assembly, as before, ferrules 17A
and 18~ are brazed or welded to bars 12J and 12I, respectively, before the amortisseur bars are inserted into their pole. The bars are then inserted, bar 12J
from side 20 and bar 12I from side 21, until the ferrules are adjacent the respective side of the pole. The bars without a ferrule may be inserted from either side. The ends of amortisseur bars 12~ - 12K
are subsequently brazed or welded to a respective end ring 14 or 14A.
Figure 4 is a sectional view taken through part of the rotor core 22 forming a pole with a pole face 16. An amortisseur bar 23 has a ferrule 24 brazed or welded to it. Ferrule 24 is in the form of a ring whose opening conEorms to the outside of bar 23 ~S35~;0 C~ 2958 and is slightly larger so that it will slip over bar 23. It is preferable to do the brazing or welding of the ferrule to the respective bar on the side that will be remote from the side of the pole so that the ferrule will butt flatly against the side of the pole to prevent axial movement. The end of the bar 23 is brazed or welded to end ring 14 after all the amortisseur bars are installed.
Figure 5 is a sectional view taken through part of a rotor core 22 and is similar to Figure 4 except that a different form of ferrule is used.
Ferrule 25 of Figure 5 has a hole 26 drilled through the ferrule to provide a convenient passaye for providiny an improved weld. The welding of t~le ferrule to the bar is done in the region of hole 26.
If desired, more than two holes 26 could be used, or alternately one hole 26 could be used. It has been found that two opposed holes, as shown, provide a satisfactory weld.
~eferring to Figures 6 and 7, yet another form of fastener is shown. The fastener in Fiyures 6 and 7 is not in the forln of a ring, however, f~r convenience it is referred to as a ferrule and it is intended that "ferrule" will include this. The ferrule of Figures 6 and 7 is a rectangular metal piece 27 and 28 brazed or welded on opposite sides of amortisseur bar 30 which has a generally oblong cross-section. Some caution must be used when braziny or welding the ferrule pieces 27 and 28 to bar 3~ to avoid getting the brazing material or weldiny material on the edges adjacent the pole side because axial moveJnent of the bar might then cause sorne distortion when the uneven material butts against the side of the pole. The terminating edyes 31 of the pair o~
pieces 27 and 28 are direc-tly opposite one arlother, ~2S3~G~
that is they are aligned with one another.
Various other forms of ferrule may be used, but whatever form of ferrule is used it is brazed or welded or otherwise fastened to an amortisseur bar at a predetermined distance from one end of the bar so that after the bar is inserted in a pole on the rotor and is positioned in its final or operatiny position, the ferrule will be closely adjacent a side of the respective pole. It is preferable that for each pole at least two amortisseur bars will have ferrules fastened thereto, one per bar, at predetermined distance from an end of the bar so that after the bars are installed the ferrules will be adjacent op~osite sides of the pole. When the bars are subsequently brazed or welded or otherwise fastened to an end ring at each end, the bars will all be secured against axial movement. While it is preferable that at least two bars per pole should have ferrules, the actual number will depend on the size of the rotor and the number of poles on the rotor. Preferably the bars having a ferrule thereon are equally spaced on either side of the pole center.
It is believed the description provided will give a satisfactory understanding of the inventionO
Claims (9)
1. In a dynamoelectric machine having a rotor with a plurality of poles, an improved method for assembling amortisseur bars in said rotor to prevent axial movement of said bars, comprising the steps of assembling a rotor core having first and second sides, installing rotor windings on said core, selecting at least two amortisseur bars for each pole of said rotor, fixedly mounting on each selected bar a single ferrule at a respective predetermined distance from the end of the respective bar, said predetermined distance being such that when one of said bars is inserted into said rotor from said first side to its final position the ferrule will be adjacent said first side of said rotor, and when the other of said bars is inserted into said rotor from said second side to its final position the ferrule will be adjacent said second side of said rotor, inserting said amortisseur bars into said rotor, and fastening the protruding ends of said amortisseur bars on said first side to a first end ring and fastening the protruding ends of said amortisseur bars on said second side to a second end ring.
2. The method of claim 1 wherein there are an even number of amortisseur bars per pole and wherein the selected bars for that pole are two in number and located on either side of the center of the pole.
3. The method of claim 1 wherein there are an odd number of amortisseur bars per pole and wherein the selected bars for each pole are two in number and located equi-distant from and on opposite sides of the center of the respective pole.
4. The method of claim 1 wherein fixedly mounting on each selected bar of a single respective ferrule comprises brazing of the ferrule to the bar.
5. A dynamoelectric machine having a rotor with a plurality of poles and rotor windings on said rotor, comprising a plurality of amortisseur bars for each pole of said rotor, at least two of said amortisseur bars per pole having a respective single ferrule fixedly mounted thereto prior to assembly of said bars in said rotor, said ferrules being a respective predetermined distance from an end of said rotor whereby one of said at least two amortisseur bars when inserted in said rotor has the respective ferrule thereon adjacent one side of said rotor and another of said at least two amortisseur bars when inserted in said rotor has the respective ferrule thereon adjacent the other side of said rotor, and an end ring for each side of said rotor fixedly mounted to the protruding ends of said amortisseur bars on the respective side of said rotor.
6. A dynamoelectric machine as defined in claim 5 wherein said ferrules are brazed to the respective amortisseur bars.
7. A dynamoelectric machine as defined in claim 5 in which the ferrules are rings having a central opening thereof of the same shape as the cross-section of an amortisseur bar and slightly larger than said cross-section.
8. A dynamoelectric machine as defined in claim 7 wherein each ferrule has at least one hole through the wall thereof to facilitate brazing or welding.
9. A dynamoelectric machine as defined in claim 5 in which each derrule is a pair of plates mounted on said opposite sides of a respective bar with the terminating edges adjacent the rotor in alignment with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000506429A CA1253560A (en) | 1986-04-11 | 1986-04-11 | Axial locking of amortisseur bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000506429A CA1253560A (en) | 1986-04-11 | 1986-04-11 | Axial locking of amortisseur bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1253560A true CA1253560A (en) | 1989-05-02 |
Family
ID=4132864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000506429A Expired CA1253560A (en) | 1986-04-11 | 1986-04-11 | Axial locking of amortisseur bars |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1253560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012101327A1 (en) * | 2011-01-26 | 2012-08-02 | Axco-Motors Oy | Joint and jointing method in a permanent magnet synchronous machine |
-
1986
- 1986-04-11 CA CA000506429A patent/CA1253560A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012101327A1 (en) * | 2011-01-26 | 2012-08-02 | Axco-Motors Oy | Joint and jointing method in a permanent magnet synchronous machine |
| US9660494B2 (en) | 2011-01-26 | 2017-05-23 | Axco-Motors Oy | Joint and jointing method in a permanent magnet synchronous machine |
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