FI128259B - A rotor of an induction machine and a method for assembling a cage winding of the rotor - Google Patents
A rotor of an induction machine and a method for assembling a cage winding of the rotor Download PDFInfo
- Publication number
- FI128259B FI128259B FI20175678A FI20175678A FI128259B FI 128259 B FI128259 B FI 128259B FI 20175678 A FI20175678 A FI 20175678A FI 20175678 A FI20175678 A FI 20175678A FI 128259 B FI128259 B FI 128259B
- Authority
- FI
- Finland
- Prior art keywords
- rotor
- rings
- longer
- core structure
- conductor bars
- Prior art date
Links
- 238000004804 winding Methods 0.000 title claims abstract description 27
- 230000006698 induction Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 18
- 239000004020 conductor Substances 0.000 claims abstract description 90
- 239000000463 material Substances 0.000 claims description 10
- 238000005219 brazing Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 230000005294 ferromagnetic effect Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/20—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having deep-bar rotors
-
- 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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
- H02K3/505—Fastening of winding heads, equalising connectors, or connections thereto for large machine windings, e.g. bar windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
- H02K3/51—Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
A rotor of an induction machine comprises a rotor core structure (102) and a cage winding. The cage winding comprises conductor bars (103, 104) and end-ring structures at ends of the cage winding. Each end-ring structure comprises axially successive first and second end-rings (105, 106, 107, 108). The ends of the conductor bars are arranged to protrude axially out from the rotor core structure so that longer ones of the ends protrude a longer distance than shorter ones of the ends. The longer ends protrude through openings of the first end-rings and through openings of the second end-rings and are attached to the second end-rings, whereas the shorter ends protrude through openings of the first end-rings only and are attached to the first end-rings. Thus, reliable mechanical attachments can be made between the conductor bars and both of the first and second endrings.
Description
A rotor of an induction machine and a method for assembling a cage winding of the rotor
Field of the technology
The disclosure relates generally to rotating electric machines. More particularly, the disclosure relates to a rotor of an induction machine. Furthermore, the disclosure relates to an induction machine and to a method for assembling a cage winding of a rotor of an induction machine.
Background
Rotating electric machines, such as motors and generators, generally comprise a stator and a rotor which are arranged so that a magnetic flux is developed between these two. A rotor of an induction machine comprises typically a rotor core structure, a shaft, and a cage winding. The cage winding comprises conductor bars and endrings. The conductor bars are located in slots of the rotor core structure. The end15 rings are connected to the ends of the conductor bars at the end-regions of the rotor core structure. The rotor core structure is typically a laminated structure composed of ferromagnetic steel sheets which are electrically insulated from each other and which are stacked in the axial direction of the rotor. However, especially in many high-speed induction machines, a rotor core structure is made of solid steel. The 20 rotor core structure made of solid steel may constitute, together with the shaft of the rotor, a single piece of solid steel.
In many induction machines, the conductor bars and the end-rings are manufactured as separate pieces of electrically conductive material and the endrings are attached to the ends of the conductor bars with electrically conductive 25 joints. The material of the conductor bars and of the end-rings can be for example copper or aluminum. The conductor bars can be attached to the end-rings for example by soldering, welding, brazing, or clenching the ends of the conductor bars axially to form tight fits with walls of openings of the end-rings through which the conductor bars are protruding. In order to obtain desired electrical properties, the 30 axial thickness of end-rings needs to be in many cases from 40 mm to 60 mm. The
20175678 prh 19-12-2019 required axial thickness may cause challenges in availability of material pieces suitable for making the end-rings, in costs of the material pieces, and/or in the manufacturing process of the end-rings.
The publication US2011080067 describes an end-ring structure which comprises two axially successive end-rings at both ends of a cage winding. This approach facilitates the manufacture of the end-rings because each end-ring is thinner in the axial direction. Furthermore, suitable material pieces are available more easily and with lower costs. This approach is however not free from challenges. One of the challenges is that end-rings which are axially closer to a rotor core structure may be 10 difficult to attach to conductor bars and thus these end-rings may get mechanically loose due to for example temperature variations and differences in thermal expansion coefficients of materials of a rotor.
Summary
The following presents a simplified summary in order to provide a basic 15 understanding of some embodiments of the invention. The summary is not an extensive overview of the invention. It is neither intended to identify key or critical elements of the invention nor to delineate the scope of the invention. The following summary merely presents some concepts of the invention in a simplified form as a prelude to a more detailed description of exemplifying embodiments of the invention.
In this document, the word “geometric” when used as a prefix means a geometric concept that is not necessarily a part of any physical object. The geometric concept can be for example a geometric point, a straight or curved geometric line, a geometric plane, a non-planar geometric surface, a geometric space, or any other geometric entity that is zero, one, two, or three dimensional.
In accordance with the invention, there is provided a new rotor for an induction machine. A rotor according to the invention comprises:
- a rotor core structure, a plurality of conductor bars in slots of the rotor core structure, and
20175678 prh 19-12-2019
- two end-ring structures electrically connecting ends of the conductor bars to each other at both ends of a cage winding constituted by the conductor bars and the end-ring structures, each of the end-ring structures comprising a first end-ring and a second end-ring axially successive to each other.
The conductor bars are located in the slots of the rotor core structure so that, at each end of the cage winding, ends of the conductor bars protrude axially out from the rotor core structure so that longer ones of the ends protrude axially a longer distance than shorter ones of the ends. The longer ends of the conductor bars protrude through first openings of the first end-rings and through openings of the 10 second end-rings and are attached to the second end-rings, whereas the shorter ends of the conductor bars protrude through second openings of the first end-rings without protruding through the second end-rings. The shorter ends of the conductor bars are attached to the first end-rings.
As the shorter ends of the conductor bars are attached to the first end-rings, the risk 15 that the first end-rings get mechanically loose, e.g. due to temperature variations, is reduced.
In accordance with the invention, there is provided also a new induction machine. An induction machine according to the invention comprises:
- a stator comprising stator windings, and
- a rotor according to the invention, the rotor being rotatably supported with respect to the stator.
In accordance with the invention, there is provided also a new method for assembling a cage winding of a rotor of an induction machine. A method according to the invention comprises:
- placing conductor bars into slots of a rotor core structure so that, at each end of the rotor core structure, ends of the conductor bars protrude axially out from the rotor core structure so that longer ones of the ends protrude axially a longer distance than shorter ones of the ends,
20175678 prh 19-12-2019
- placing first end-rings so that the shorter and longer ends of the conductor bars protrude through openings of the first end-rings,
- attaching the shorter ends of the conductor bars to the first end-rings,
- placing second end-rings so that only the longer ends of the conductor bars protrude through openings of the second end-rings, and
- attaching the longer ends of the conductor bars to the second end-rings.
Exemplifying and non-limiting embodiments of the invention are described in accompanied dependent claims.
Various exemplifying and non-limiting embodiments of the invention both as to 10 constructions and to methods of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific exemplifying embodiments when read in conjunction with the accompanying drawings.
The verbs “to comprise” and “to include” are used in this document as open 15 limitations that neither exclude nor require the existence of also un-recited features.
The features recited in dependent claims are mutually freely combinable unless otherwise explicitly stated. Furthermore, it is to be understood that the use of a or an, i.e. a singular form, throughout this document does not exclude a plurality.
Brief description of the figures
Exemplifying and non-limiting embodiments of the invention and their advantages are explained in greater detail below in the sense of examples and with reference to the accompanying drawings, in which:
figures 1a, 1b, 1c, and 1d illustrate a rotor according to an exemplifying and nonlimiting embodiment of the invention, figures 2a and 2b illustrate a detail of a rotor according to an exemplifying and nonlimiting embodiment of the invention,
20175678 prh 19-12-2019 figure 3 illustrates an electric machine according to an exemplifying and non-limiting embodiment of the invention, and figure 4 shows a flowchart of a method according to an exemplifying and non-limiting embodiment of the invention for assembling a cage winding of a rotor of an induction 5 machine.
Description of exemplifying and non-limiting embodiments
The specific examples provided in the description given below should not be construed as limiting the scope and/or the applicability of the appended claims. Furthermore, it is to be understood that lists and groups of examples provided in the 10 description given below are not exhaustive unless otherwise explicitly stated.
Figures 1a, 1b, and 1c show section views of a rotor 101 according to an exemplifying and non-limiting embodiment of the invention. The section shown in figure 1a is taken along a geometric fraction line A-A shown in figures 1b and 1c, and the geometric section surface is perpendicular to the xy-plane of a coordinate 15 system 199. The section shown in figure 1b is taken along a geometric line B1-B1 shown in figure 1a, and the geometric section plane is parallel with the xy-plane of the coordinate system 199. The section shown in figure 1c is taken along a geometric line B2-B2 shown in figure 1a, and the geometric section plane is parallel with the xy-plane of the coordinate system 199. The rotor 101 comprises a rotor 20 core structure 102. In this exemplifying case, the rotor core structure 102 is made of solid ferromagnetic steel and the rotor core structure and a shaft 114 of the rotor constitute a single piece of solid steel. It is, however, also possible that a rotor according to an exemplifying and non-limiting embodiment comprises a rotor core structure that comprises a stack of ferromagnetic steel sheets so that the 25 ferromagnetic steel sheets are electrically insulated from each other and stacked on each other in the axial direction of the rotor.
The rotor 101 comprises a cage winding that comprises a plurality of conductor bars located in slots of the ferromagnetic core structure 102. In figures 1 a and 1 b, two of the conductor bars are denoted with references 103 and 104. In this exemplifying 30 case, the slots of the rotor core structure are open slots having slot openings on the
20175678 prh 19-12-2019 airgap surface of the rotor core structure 102. It is, however, also possible that a rotor according to an exemplifying and non-limiting embodiment comprises a rotor core structure that comprises closed slots. The cage winding comprises two endring structures 115 and 116. The end-ring structure 115 connects ends of the 5 conductor bars electrically to each other at a first end of the rotor core structure 102.
Correspondingly, the end-ring structure 116 connects ends of the conductor bars electrically to each other at the second end of rotor core structure 102. The end-ring structure 115 comprises a first end-ring 105 and a second end-ring 106 which are axially successive to each other and in contact with each other. Correspondingly, 10 the end-ring structure 116 comprises an end-ring 107 and an end-ring 108 which are axially successive to each other and in contact with each other.
The conductor bars are located in the slots of the rotor core structure 102 so that, at each end of the rotor core structure, ends of the conductor bars protrude axially out from the rotor core structure so that longer ones of the ends protrude axially a 15 longer distance than shorter ones of the ends. As illustrated in figure 1a, the conductor bar 103 has its longer end at the first end of the rotor core structure and its shorter end at the second end of the rotor core structure, whereas the conductor bar 104 has its shorter end at the first end of the rotor core structure and its longer end at the second end of the rotor core structure. The longer ends of the conductor 20 bars protrude through first openings of the end-rings 105 and 107 and through openings of the end-rings 106 and 108. The longer ends are attached to the endrings 106 and 108. The shorter ends of the conductor bars protrude through second openings of the end-rings 105 and 107 without protruding through the end-rings 106 and 108. The shorter ends are attached to the end-rings 105 and 107. As illustrated 25 in figures 1a and 1c, the end-ring 106 has openings for the longer ends only.
Correspondingly, the end-ring 108 has openings for the longer ends only. As the shorter ends of the conductor bars are attached to the end-rings 105 and 107, the risk that the end-rings 105 and 107 get mechanically loose, e.g. due to temperature variations, is reduced. In this exemplifying case, the openings of the end-rings 10530 108 are apertures so that the end-rings are capable of radially supporting the ends of the conductor bars. It is, however, also possible that the openings are slots on
20175678 prh 19-12-2019 the outer circumferences of the end-rings or on the inner circumferences of the endrings.
The shorter ends of the conductor bars can be attached to the end-rings 105 and 107 for example so that the shorter ends are axially clenched to form tight fits with walls of the openings of the end-rings 105 and 106. Correspondingly, the longer ends of the conductor bars can be attached to the end-rings 106 and 108 for example so that the longer ends are axially clenched to form tight fits with walls of the openings of the end-rings 106 and 108. It is, however, also possible that the ends of the conductor bars are attached to the end-ring structures by soldering, brazing, or welding.
In the exemplifying rotor 101 illustrated in figures 1a-1c, the conductor bars are arranged so that, at each end of the cage winding, every second end of the conductor bars is a longer end and every second end is correspondingly a shorter end. In other words, at each end of the cage winding, there is between adjacent ones of the shorter ends of the conductor bars one of the longer ends of the conductor bars, and between adjacent ones of the longer ends of the conductor bars one of the shorter ends of the conductor bars.
In the exemplifying rotor 101 illustrated in figures 1a-1c, each of the conductor bars comprises a first end-portion, a middle-portion, and a second end-portion so that the middle-portion is wider in a radial direction than the first and second end-portions and the first end-portion is axially longer than the second end-portion. Figure 1d shows the conductor bars 103 and 104 separately from the other parts of the rotor 101. In figure 1 d, the first end-portion of the conductor bar 103 is denoted with a reference 109, the middle-portion of the conductor bar 103 is denoted with a reference 110, and the second end-portion of the conductor bar 103 is denoted with a reference 111. The conductor bars are located in the slots of the rotor core structure so that the first end-portions constitute the longer ends of the conductor bars and the second end-portions constitute the shorter ends of the conductor bars. As can be understood based on figures 1 a and 1 d, the conductor bars can be similar to each other but adjacent conductor bars are oppositely directed in the slots of the rotor core structure.
20175678 prh 19-12-2019
The end-ring structure 115 may further comprise an electrically conductive layer that is between the end-rings 105 and 106 and in contact with the end-rings 105 and 106. Correspondingly, the end-ring structure 116 may comprise an electrically conductive layer that is between the end-rings 107 and 108 and in contact with the 5 end-rings 107 and 108. The material of the electrically conductive layers is advantageously different from the material of the end-rings. The material of each electrically conductive layer can be for example tin or other material having a high electrical conductivity so as to ensure a good galvanic contact between the endrings of each end-ring structure. The electrically conductive layer can be for example 10 a coating of tin on an axially facing surface of an end-ring. It is also possible that the electrically conductive layer is constituted by two coatings on axially facing surfaces of the end-rings.
Figures 2a and 2b illustrate a detail of a rotor according to an exemplifying and nonlimiting embodiment of the invention. Figure 2a shows a section taken along a 15 geometric line A-A shown in figure 2b. The geometric section plane relating to figure
2a is parallel with the yz-plane of a coordinate system 299. Figure 2b shows a section taken along a geometric line B-B shown in figure 2a. The geometric section plane relating to figure 2b is parallel with the xy-plane of the coordinate system 299. The axial direction of the rotor is parallel with the z-axis of the coordinate system 20 299. In this exemplifying case, the rotor comprises wedges at the openings of the slots of the rotor core structure 202 so that the conductor bars are radially between the wedges and the bottoms of the slots of the rotor core structure. The wedges are arranged to radially support the conductor bars. In figures 2a and 2b, one of the wedges is denoted with a reference 212 and one of the conductor bars is denoted 25 with a reference 203. Axially successive end-rings of one of the end-ring structures are denoted with references 205 and 206. The wedges can be made of for example electrically conductive and/or non-magnetic material such as e.g. copper or brass.
Figure 3 illustrates an induction machine according to an exemplifying and nonlimiting embodiment of the invention. The induction machine comprises a rotor 301 30 according to an embodiment of the invention and a stator 302. The rotor 301 is rotatably supported with respect to the stator 302. Arrangements for rotatably supporting the rotor 301 with respect to the stator 302 are not shown in figure 3. The
20175678 prh 19-12-2019 stator 302 comprises stator windings 313 for generating a rotating magnetic field in response to being supplied with alternating currents. The stator windings 313 can be for example a three-phase winding. The rotor 301 can be for example such as illustrated in figures 1a-1d or such as illustrated in figures 2a and 2b.
Figure 4 shows a flowchart of a method according to an exemplifying and nonlimiting embodiment of the invention for assembling a cage winding of a rotor of an induction machine. The method comprises the following actions:
- action 401: placing conductor bars into slots of a rotor core structure so that, at each end of the rotor core structure, ends of the conductor bars protrude axially out from the rotor core structure so that longer ones of the ends protrude axially a longer distance than shorter ones of the ends,
- action 402: placing first end-rings so that the shorter and longer ends of the conductor bars protrude through openings of the first end-rings,
- action 403: attaching the shorter ends of the conductor bars to the first end- rings,
- action 404: placing second end-rings so that only the longer ends of the conductor bars protrude through openings of the second end-rings, and
- action 405: attaching the longer ends of the conductor bars to the second end-rings.
In a method according to an exemplifying and non-limiting embodiment of the invention, the conductor bars are placed into the slots of the rotor core structure so that, at each end of the rotor core structure, there is between adjacent ones of the shorter ends of the conductor bars one of the longer ends of the conductor bars, and between adjacent ones of the longer ends of the conductor bars one of the 25 shorter ends of the conductor bars.
In a method according to an exemplifying and non-limiting embodiment of the invention, each of the conductor bars comprises a first end-portion, a middle-portion, and a second end-portion so that the middle-portion is wider in a radial direction than the first and second end-portions and the first end-portion is axially longer than the second end-portion. The conductor bars are placed in the slots of the rotor core structure so that the first end-portions constitute the longer ends of the conductor bars and the second end-portions constitute the shorter ends of the conductor bars.
In a method according to an exemplifying and non-limiting embodiment of the invention, the shorter ends of the conductor bars are attached to the first end-rings by clenching the shorter ends axially to form tight fits with walls of the openings of the first end-rings, and the longer ends of the conductor bars are attached to the second end-rings by clenching the longer ends axially to form tight fits with walls of 10 the openings of the second end-rings. It is also possible that the ends of the conductor bars are attached to the end-ring structures by soldering, brazing, or welding.
The specific examples provided in the description given above should not be construed as limiting the scope and/or the applicability of the appended claims. Lists 15 and groups of examples provided in the description given above are not exhaustive unless otherwise explicitly stated.
Claims (12)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20175678A FI128259B (en) | 2017-07-11 | 2017-07-11 | A rotor of an induction machine and a method for assembling a cage winding of the rotor |
PCT/FI2018/050393 WO2019012178A1 (en) | 2017-07-11 | 2018-05-24 | A rotor of an induction machine and a method for assembling a cage winding of the rotor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20175678A FI128259B (en) | 2017-07-11 | 2017-07-11 | A rotor of an induction machine and a method for assembling a cage winding of the rotor |
Publications (2)
Publication Number | Publication Date |
---|---|
FI20175678A1 FI20175678A1 (en) | 2019-01-12 |
FI128259B true FI128259B (en) | 2020-01-31 |
Family
ID=62563177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI20175678A FI128259B (en) | 2017-07-11 | 2017-07-11 | A rotor of an induction machine and a method for assembling a cage winding of the rotor |
Country Status (2)
Country | Link |
---|---|
FI (1) | FI128259B (en) |
WO (1) | WO2019012178A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021102296A1 (en) | 2021-02-02 | 2022-08-04 | Bayerische Motoren Werke Aktiengesellschaft | Squirrel cage for a rotor of an electrical machine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US854760A (en) * | 1906-09-11 | 1907-05-28 | Gen Electric | Induction-motor. |
JP2670986B2 (en) * | 1995-02-09 | 1997-10-29 | 明 千葉 | Electromagnetic rotating machine |
JP4728419B2 (en) | 2009-10-07 | 2011-07-20 | ファナック株式会社 | Cage type rotor and method of manufacturing a cage type rotor |
DE102015204872A1 (en) * | 2014-10-09 | 2016-04-14 | Robert Bosch Gmbh | Squirrel cage rotor for an electric asynchronous machine with a short-circuit ring stabilizing tie rods |
CN107819366A (en) * | 2016-09-14 | 2018-03-20 | 上海蔚兰动力科技有限公司 | The rotor and its manufacture method of induction conductivity |
CN206259769U (en) * | 2016-10-27 | 2017-06-16 | 蔚来汽车有限公司 | Motor rotor construction with copper sliver |
-
2017
- 2017-07-11 FI FI20175678A patent/FI128259B/en active IP Right Grant
-
2018
- 2018-05-24 WO PCT/FI2018/050393 patent/WO2019012178A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2019012178A1 (en) | 2019-01-17 |
FI20175678A1 (en) | 2019-01-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10819169B2 (en) | Axial gap rotating electrical machine and manufacturing method for the same | |
US20190229594A1 (en) | Stator for an electric rotating machine | |
JP5879121B2 (en) | Axial gap rotating electric machine | |
JP5569289B2 (en) | Rotating electric machine stator | |
US20150001979A1 (en) | Axial Gap Rotating Electric Machine | |
JP7257602B2 (en) | coil | |
US11996749B2 (en) | Armature | |
US20140117793A1 (en) | Transverse flux motor | |
US20150380992A1 (en) | Axial Gap-Type Electric Rotating Machine | |
JP2009261188A (en) | Stator of electric rotating machine, and electric rotating machine | |
JP2009268161A (en) | Stator for rotary electric machine, and rotary electric machine | |
CN111628591A (en) | Stator, stator assembly and converter of electric energy and mechanical energy | |
FI128225B (en) | A stator of an electric machine and an electric machine | |
US10333364B2 (en) | Slot insulation for electrical machines | |
FI128259B (en) | A rotor of an induction machine and a method for assembling a cage winding of the rotor | |
US20110210638A1 (en) | Stator for electric rotating machine | |
JP2005151785A (en) | Synchronous generator having annular armature coil | |
JP2017163675A (en) | Stator core, stator and rotary electric machine | |
US10128717B2 (en) | Ring for an electric machine | |
JP2018129975A (en) | Rotary electric machine, and manufacturing method and manufacturing device for tortoiseshell-shaped coil | |
JP2010239680A (en) | Armature for rotary electric machine and manufacturing method therefor | |
US20210367462A1 (en) | A rotor of a synchronous reluctance machine and a method for manufacturing the same | |
JP2015107024A (en) | Stator and rotary electric machine | |
EP3776812B1 (en) | Winding of an electric machine | |
WO2019220007A1 (en) | A rotor of a permanent magnet machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG | Patent granted |
Ref document number: 128259 Country of ref document: FI Kind code of ref document: B |