GB2505475B - Compressing a laminated stack in an electrical machine - Google Patents

Compressing a laminated stack in an electrical machine

Info

Publication number
GB2505475B
GB2505475B GB1215534.7A GB201215534A GB2505475B GB 2505475 B GB2505475 B GB 2505475B GB 201215534 A GB201215534 A GB 201215534A GB 2505475 B GB2505475 B GB 2505475B
Authority
GB
United Kingdom
Prior art keywords
compressing
electrical machine
laminated stack
stack
laminated
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 - Fee Related
Application number
GB1215534.7A
Other versions
GB2505475A (en
GB201215534D0 (en
Inventor
Robert Scott Semken
Juha Jaakko Pyrhonen
Yulia Alexandrova
Maria Polikarpova
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lappeenrannan Teknillinen Yliopisto
Original Assignee
Lappeenrannan Teknillinen Yliopisto
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lappeenrannan Teknillinen Yliopisto filed Critical Lappeenrannan Teknillinen Yliopisto
Priority to GB1215534.7A priority Critical patent/GB2505475B/en
Publication of GB201215534D0 publication Critical patent/GB201215534D0/en
Priority to EP15199400.1A priority patent/EP3032704B1/en
Priority to KR1020207007261A priority patent/KR20200031178A/en
Priority to EP13792076.5A priority patent/EP2893615B8/en
Priority to KR1020157008307A priority patent/KR102090317B1/en
Priority to KR1020207007262A priority patent/KR20200031179A/en
Priority to CN202010213354.XA priority patent/CN111313575A/en
Priority to CN201380057178.3A priority patent/CN104969444B/en
Priority to EP15199386.2A priority patent/EP3051665B1/en
Priority to EP15199389.6A priority patent/EP3032703B1/en
Priority to EP15199398.7A priority patent/EP3026790B8/en
Priority to CN201810936029.9A priority patent/CN109149799A/en
Priority to US14/425,085 priority patent/US9935506B2/en
Priority to PCT/IB2013/058098 priority patent/WO2014033647A2/en
Priority to EP15199399.5A priority patent/EP3051666A1/en
Priority to CN202010214119.4A priority patent/CN111384794B/en
Publication of GB2505475A publication Critical patent/GB2505475A/en
Application granted granted Critical
Publication of GB2505475B publication Critical patent/GB2505475B/en
Priority to US15/927,247 priority patent/US10541573B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H02K1/2783—Surface mounted magnets; Inset magnets with magnets arranged in Halbach arrays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/045—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front having axially compressing parts allowing the clamping of an object tightly to the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/10—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate gripping parts moved into their final position in relation to the body of the device by a separate operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F16B5/0275—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the screw-threaded element having at least two axially separated threaded portions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • 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
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/028—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots for fastening to casing or support, respectively to shaft or hub
    • 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
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12—Machines characterised by the modularity of some components
    • 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
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
GB1215534.7A 2012-08-31 2012-08-31 Compressing a laminated stack in an electrical machine Expired - Fee Related GB2505475B (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
GB1215534.7A GB2505475B (en) 2012-08-31 2012-08-31 Compressing a laminated stack in an electrical machine
EP15199398.7A EP3026790B8 (en) 2012-08-31 2013-08-29 Electrical machine
US14/425,085 US9935506B2 (en) 2012-08-31 2013-08-29 Electrical machine
EP13792076.5A EP2893615B8 (en) 2012-08-31 2013-08-29 Electrical machine
KR1020157008307A KR102090317B1 (en) 2012-08-31 2013-08-29 Electrical machine
KR1020207007262A KR20200031179A (en) 2012-08-31 2013-08-29 Electrical machine
CN202010213354.XA CN111313575A (en) 2012-08-31 2013-08-29 Electric machine
CN201380057178.3A CN104969444B (en) 2012-08-31 2013-08-29 Motor
EP15199386.2A EP3051665B1 (en) 2012-08-31 2013-08-29 Electrical machine
EP15199389.6A EP3032703B1 (en) 2012-08-31 2013-08-29 Electrical machine
EP15199400.1A EP3032704B1 (en) 2012-08-31 2013-08-29 Electrical machine
CN201810936029.9A CN109149799A (en) 2012-08-31 2013-08-29 Motor
KR1020207007261A KR20200031178A (en) 2012-08-31 2013-08-29 Electrical machine
PCT/IB2013/058098 WO2014033647A2 (en) 2012-08-31 2013-08-29 Electrical machine
EP15199399.5A EP3051666A1 (en) 2012-08-31 2013-08-29 Electrical machine
CN202010214119.4A CN111384794B (en) 2012-08-31 2013-08-29 Electrical machine
US15/927,247 US10541573B2 (en) 2012-08-31 2018-03-21 Electrical machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1215534.7A GB2505475B (en) 2012-08-31 2012-08-31 Compressing a laminated stack in an electrical machine

Publications (3)

Publication Number Publication Date
GB201215534D0 GB201215534D0 (en) 2012-10-17
GB2505475A GB2505475A (en) 2014-03-05
GB2505475B true GB2505475B (en) 2015-11-18

Family

ID=47075055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1215534.7A Expired - Fee Related GB2505475B (en) 2012-08-31 2012-08-31 Compressing a laminated stack in an electrical machine

Country Status (1)

Country Link
GB (1) GB2505475B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10431364B2 (en) 2014-02-27 2019-10-01 C&C Technologies, Llc Electro-mechanical device and manufacturing methods for various applications
CN107516958B (en) * 2016-06-15 2020-12-01 德昌电机(深圳)有限公司 Rotor, motor with rotor and electric tool
FI129747B (en) 2017-03-22 2022-08-15 Lappeenrannan Teknillinen Yliopisto A control device and a method for controlling an electric drive
CN109950994B (en) * 2019-04-12 2020-08-11 新疆金风科技股份有限公司 Motor rotor and motor
EP3780343A1 (en) * 2019-08-13 2021-02-17 Siemens Gamesa Renewable Energy A/S Stator for an electric generator for a wind turbine
CN113949187A (en) * 2021-10-22 2022-01-18 重庆赛力盟电机有限责任公司 Copper pipe rotor and motor using same
CN116846104A (en) * 2022-03-25 2023-10-03 法雷奥汽车动力系统(上海)有限公司 Motor rotor, motor, vehicle and motor rotor assembling method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1049158A (en) * 1963-07-02 1966-11-23 G K N Reinforcements Ltd Improvements relating to stressing of concrete structures
GB1150889A (en) * 1965-11-29 1969-05-07 Ass Elect Ind Improvements in or relating to Bolt Arrangements For Steam Turbine Casings
GB1197413A (en) * 1968-01-19 1970-07-01 Atlas Copco Ab Improvements in Screw Threaded Assemblies
GB1252016A (en) * 1967-12-20 1971-11-03
SU764051A1 (en) * 1976-12-20 1980-09-15 Предприятие П/Я А-7376 Method for pressing stator core of turbogenerator
JPS60213236A (en) * 1984-04-06 1985-10-25 Toshiba Corp Rotor core for rotary electric machine
EP1217231A1 (en) * 2000-12-22 2002-06-26 General Electric Company Bolted joint for rotor disks and method of reducing thermal gradients therein
US20090218900A1 (en) * 2007-08-16 2009-09-03 Gary Dickes Permanent Magnet Alternator with Segmented Construction

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1049158A (en) * 1963-07-02 1966-11-23 G K N Reinforcements Ltd Improvements relating to stressing of concrete structures
GB1150889A (en) * 1965-11-29 1969-05-07 Ass Elect Ind Improvements in or relating to Bolt Arrangements For Steam Turbine Casings
GB1252016A (en) * 1967-12-20 1971-11-03
GB1197413A (en) * 1968-01-19 1970-07-01 Atlas Copco Ab Improvements in Screw Threaded Assemblies
SU764051A1 (en) * 1976-12-20 1980-09-15 Предприятие П/Я А-7376 Method for pressing stator core of turbogenerator
JPS60213236A (en) * 1984-04-06 1985-10-25 Toshiba Corp Rotor core for rotary electric machine
EP1217231A1 (en) * 2000-12-22 2002-06-26 General Electric Company Bolted joint for rotor disks and method of reducing thermal gradients therein
US20090218900A1 (en) * 2007-08-16 2009-09-03 Gary Dickes Permanent Magnet Alternator with Segmented Construction

Also Published As

Publication number Publication date
GB2505475A (en) 2014-03-05
GB201215534D0 (en) 2012-10-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20210831