CA2519478A1 - Current limiting means for a generator - Google Patents

Current limiting means for a generator Download PDF

Info

Publication number
CA2519478A1
CA2519478A1 CA002519478A CA2519478A CA2519478A1 CA 2519478 A1 CA2519478 A1 CA 2519478A1 CA 002519478 A CA002519478 A CA 002519478A CA 2519478 A CA2519478 A CA 2519478A CA 2519478 A1 CA2519478 A1 CA 2519478A1
Authority
CA
Canada
Prior art keywords
winding
electric machine
stator assembly
machine
rotor
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.)
Granted
Application number
CA002519478A
Other languages
French (fr)
Other versions
CA2519478C (en
Inventor
Kevin Dooley
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.)
Pratt and Whitney Canada Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2519478A1 publication Critical patent/CA2519478A1/en
Application granted granted Critical
Publication of CA2519478C publication Critical patent/CA2519478C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the 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
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • H02K3/493—Slot-closing devices magnetic
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Windings For Motors And Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the invention, to limit the maximum current in the winding as a matter of machine design.

Claims (40)

1. An electric machine operable as an alternator, the machine comprising:

a moveable magnetic rotor assembly; and a stationary stator assembly mounted adjacent the rotor assembly, the stator assembly including at least one electrical winding disposed in at least one slot defined in the stator assembly, the at least one electrical winding being electrically connected to a machine output adapted to deliver generated output electricity from the machine, the slot having an upper end, the slot upper end having a shape and construction, the slot upper end being disposed between the at least one winding and the rotor, wherein, in use, movement of the rotor assembly induces a first alternating voltage and current in the at least one winding, and wherein, said slot upper end shape and construction have an associated inductance which is sufficiently high relative to said induced alternating current such that, in use, a magnetic flux flows. through said slot upper end and around the at least one winding in response to said induced alternating current in said winding, thereby inducing a second alternating voltage and current in the at least one winding opposite in polarity to said first alternating voltage and current, thereby limiting an output current in the at least one winding to a pre-selected value.
2. The electric machine of claim 1 wherein the pre-selected value is below a current magnitude at which the machine will be thermally damaged by reason of such current magnitude passing through the winding.
3. The electric machine of claim 1 wherein the slot upper end shape and construction includes an air gap defined in the stator assembly.
4. The electric machine of claim 3 wherein the air gap is narrower than at least one electrical winding.
5. The electric machine of claim 1 wherein the slot upper end is completely closed.
6. The electric machine of claim 5 wherein the slot upper end shape and construction includes a portion composed of a material different than a material comprising a portion of the stator assembly defining the at least one slot.
7. The electric machine of claim 1 wherein the rotor includes a plurality of permanent magnets.
8. The electric machine of claim 1 wherein a portion of the stator assembly is comprised of a material having a Curie point below a threshold temperature, the threshold temperature being a maximum temperature sustainable internally in the machine without the machine suffering critical thermal damage.
9. An electric machine operable as an alternator, the machine comprising:

at least one primary magnetic circuit, the primary magnetic circuit at , least partially defined by a stator assembly, a rotor and a plurality of permanent magnets mounted to the rotor, the rotor mounted adjacent the stator assembly and adapted for movement relative to the stator assembly, the stator assembly having at least one electrical winding disposed in at least one slot defined in the stator assembly, the at least one electrical winding electrically connected to a machine output adapted to deliver generated output electricity from the machine, wherein, in use, relative movement between the rotor and the stator assembly causes a primary magnetic flux to flow around the primary magnetic circuit, the slot and winding being disposed in the stator assembly such that, in use, the primary magnetic flux flowing around the primary magnetic circuit induces a primary voltage across the winding and an associated alternating current flow in the winding to thereby deliver output electricity from the machine; and at least one secondary magnetic circuit defined in the stator assembly and encircling the winding within the stator assembly, the secondary magnetic circuit at least partially defined by the slot, wherein the secondary magnetic circuit has a magnetic inductance which is sufficiently high such that, in use, said induced alternating current in the winding induces a secondary magnetic flux of sufficient magnitude to flow around the secondary magnetic circuit to thereby induce a secondary voltage across the winding opposite in polarity to the primary voltage and of sufficient magnitude to limit a maximum current flow in the winding to at least a desired maximum current flow limit.
10. The electric machine of claim 9 wherein the magnetic inductance of the secondary magnetic circuit is less than a magnetic inductance associated with the primary magnetic circuit.
11. The electric machine of claim 9 wherein the desired maximum current flow limit is predetermined to limit thermal energy generated in the winding at the desired maximum current flow limit is insufficient to cause thermal damage to the machine.
12. The electric machine of claim 9 wherein the magnetic inductance is sufficiently high such that, in use, a short circuit current in the winding is limited to a current magnitude below that at which thermal damage is caused to the machine.
13. The electric machine of claim 9 wherein a portion of the secondary magnetic circuit passes between the rotor and the winding.
14. The electric machine of claim 9 wherein the secondary magnetic circuit is defined at least partially by the slot and an air gap between a plurality of teeth of the stator assembly.
15. The electric machine of claim 14 wherein the air gap has a width which is less than a minimum cross-sectional width of the winding.
16. The electric machine of claim 14 wherein the air gap is disposed on the stator assembly between the winding and the rotor.
17. The electric machine of claim 9 wherein the secondary magnetic circuit is defined at least partially by the at least one slot and a filler member.
18. The electric machine of claim 17 wherein the filler member is disposed across the slot.
19. The electric machine of claim 17 wherein the filler member is disposed between the winding and the rotor.
20. The electric machine of claim 17 wherein the filler member is comprised of a material different than a material comprising a remainder of the stator assembly.
21. The electric machine of claim 9 wherein a portion of the primary magnetic circuit is comprised of a material having a Curie point below a threshold temperature, the threshold temperature being a maximum temperature sustainable internally in the machine without the machine suffering thermal damage.
22. The electric machine of claim 21 wherein a material in the secondary magnetic circuit has a higher Curie point than said portion of the primary magnetic circuit.
23. An electric machine comprising:

a stator, the stator having a plurality of spaced-apart teeth, a core portion, a plurality of slots defined at least in part by the core portion and pairs of adjacent said teeth, the stator additionally including at least one slot top portion extending between a first pair of adjacent teeth to substantially close at least one of said slots, the slot top portion having a shape and construction;
a magnetic rotor mounted adjacent the stator for movement relative to the stator; and at least one current-carrying winding disposed in said substantially closed slot of the stator such that the at winding is encircled by said first pair of adjacent teeth, the core portion and the slot top portion, wherein, when the machine is operated and the rotor is moved relative to the stator to induce a current in the winding, a magnetic flux of pre-selected strength is permitted to flow through the slot top portion by reason of the slot top portion shape and construction, thereby causing a maximum current in the at least one winding to be limited to a pre-selected maximum magnitude.
24. The electric machine of claim 23 wherein the pre-selected value is below a current magnitude at which the machine is damaged by reason of current of said magnitude passing through the winding.
25. The electric machine of claim 23 wherein the slot top portion is disposed between the winding and the rotor.
26. The electric machine of claim 23 wherein the slot top portion completely closes the slot top.
27. The electric machine of claim 23 wherein the slot top portion has an air gap defined therein.
28. The electric machine of claim 23 wherein the air gap is narrower than a minimum width of the winding.
29. The electric machine of claim 23 wherein the rotor includes a plurality of permanent magnets mounted thereto.
30. The electric machine of claim 23 wherein the plurality of spaced-apart teeth and core portions comprises separate pieces of the stator assembly.
31. The electric machine of claim 23 wherein the plurality of spaced-apart teeth and core portions are integral with one another.
32. The electric machine of claim 23 wherein the plurality of spaced-apart teeth and the slot top portion are integral with one another.
33. An alternator comprising:

a stator assembly, the stator assembly having at least one electrical winding disposed in the stator assembly, the at least one electrical winding electrically connected to a machine output adapted to deliver generated output electricity from the machine;

a rotor having a plurality of permanent magnets mounted to the rotor, the rotor mounted adjacent the stator assembly and adapted for movement relative to the stator assembly, whereby in use relative movement between the rotor and the stator assembly induces a primary voltage across the winding and an associated alternating current flow in the winding; and at least one secondary magnetic circuit circling the winding in the stator assembly, the secondary magnetic circuit having a selected magnetic inductance by reason of its shape and construction such that, in use, said induced alternating current in the winding induces a secondary magnetic flux in the secondary magnetic circuit sufficient to induce a secondary voltage across the winding to thereby limit a maximum short circuit current of the at least one winding to a level below that at which irreparable thermal damage is caused to the machine.
34. The electric machine of claim 33 wherein a portion of the secondary magnetic circuit passes between the winding and the rotor.
35. The electric machine of claim 33 wherein the secondary magnetic circuit includes an air gap.
36. The electric machine of claim 35 wherein the air gap is narrower than a width of the winding.
37. The electric machine of claim 35 wherein the air gap size is unsuitable to permit the winding to be inserted therethrough into the stator assembly.
38. The electric machine of claim 34 wherein said portion is composed of a material having a lower magnetic permeability than a remainder of the stator assembly.
39. The electric machine of claim 33 wherein a portion of the stator assembly is comprised of a material having a Curie point below a threshold temperature, the threshold temperature being a maximum temperature sustainable internally in the machine without the machine suffering thermal damage.
40. The electric machine of claim 37 wherein a material in the secondary magnetic circuit has a higher Curie point than said portion of the stator assembly.
CA2519478A 2003-03-21 2004-03-19 Current limiting means for a generator Expired - Fee Related CA2519478C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/393,252 US7119467B2 (en) 2003-03-21 2003-03-21 Current limiting means for a generator
US10/393,252 2003-03-21
PCT/CA2004/000408 WO2004084378A1 (en) 2003-03-21 2004-03-19 Current limiting means for a generator

Publications (2)

Publication Number Publication Date
CA2519478A1 true CA2519478A1 (en) 2004-09-30
CA2519478C CA2519478C (en) 2012-02-21

Family

ID=32988104

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2519478A Expired - Fee Related CA2519478C (en) 2003-03-21 2004-03-19 Current limiting means for a generator

Country Status (6)

Country Link
US (4) US7119467B2 (en)
EP (1) EP1609227B1 (en)
JP (1) JP2006521077A (en)
CA (1) CA2519478C (en)
DE (1) DE602004027997D1 (en)
WO (1) WO2004084378A1 (en)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7119467B2 (en) * 2003-03-21 2006-10-10 Pratt & Whitney Canada Corp. Current limiting means for a generator
US7262539B2 (en) 2004-11-26 2007-08-28 Pratt & Whitney Canada Corp. Saturation control of electric machine
US7545056B2 (en) * 2003-05-27 2009-06-09 Pratt & Whitney Canada Corp. Saturation control of electric machine
US7388311B2 (en) * 2005-09-14 2008-06-17 Ashman Technologies Redundant windings with current limiting means for electric machines
KR100785276B1 (en) * 2005-12-29 2007-12-13 한국전기연구원 Permanent magnet excited transverse flux motor with out-rotor
US7439713B2 (en) * 2006-09-20 2008-10-21 Pratt & Whitney Canada Corp. Modulation control of power generation system
US7750530B2 (en) * 2007-05-16 2010-07-06 Pratt & Whitney Canada Corp. Outside rotor electric machine with reduced air gap variation
US7595612B2 (en) * 2007-05-21 2009-09-29 Honeywell International Inc. Wide speed range electric power generation system using high reactance permanent magnet machine
US8076882B2 (en) 2007-12-26 2011-12-13 Pratt & Whitney Canada Corp. Motor drive architecture with active snubber
US7586204B2 (en) * 2008-01-22 2009-09-08 Hamilton Sundstrand Corporation Permanent magnet alternator speed detection circuit with feedback at lower speeds
US20100090549A1 (en) * 2008-10-10 2010-04-15 General Electric Company Thermal management in a fault tolerant permanent magnet machine
US20100090557A1 (en) * 2008-10-10 2010-04-15 General Electric Company Fault tolerant permanent magnet machine
EP2388891A1 (en) * 2010-05-19 2011-11-23 Siemens Aktiengesellschaft Generator with compact single turn wave winding and wind turbine
US8575871B1 (en) 2010-07-23 2013-11-05 Christopher Moore Modular component electric machine
KR101047185B1 (en) 2010-08-13 2011-07-06 자크리토에 악치오네르노에 오브쉐스트보 나우치노-프로이즈보드스트베노에 프레드프리야티에 “인카르-엠” Electromechanical converters
US8692501B2 (en) 2011-06-16 2014-04-08 Hamilton Sundstrand Corporation Permanent magnet alternator margin detector
JP5745379B2 (en) * 2011-10-04 2015-07-08 日立オートモティブシステムズ株式会社 Rotating electric machine and electric vehicle
ITMI20112143A1 (en) * 2011-11-25 2013-05-26 Phase Motion Control S R L BRUSHLESS ENGINE WITH PERMANENT MAGNETS WITH INDUCTANCE CONTROL
TW201328136A (en) * 2011-12-23 2013-07-01 Univ Nat Cheng Kung Permanent magnet apparatus
US20130181571A1 (en) * 2012-01-17 2013-07-18 Hsiu-Mei Chang Structure for Electrical Machines
US10396615B2 (en) * 2013-02-28 2019-08-27 General Electric Company Electric machine stator lamination with dual phase magnetic material
TWI491145B (en) * 2013-04-30 2015-07-01 Ghing Hsin Dien Electric machine
DE102014206188A1 (en) * 2014-04-01 2015-10-01 Robert Bosch Gmbh Coil carrier of an electrical machine
BR112016029587A2 (en) * 2014-06-17 2017-08-22 Heron Energy Pte Ltd electromagnetic device
EP3197029B1 (en) * 2016-01-19 2019-05-29 Gebrüder Klöcker GmbH Device using an electric motor for forming a leno selvedge, in particular for a loom, and projectile weaving loom equipped with said device
CN107133550B (en) * 2016-02-29 2019-12-03 北京小米移动软件有限公司 Fingerprint authentication method and device
GB2587186A (en) * 2019-09-11 2021-03-24 Rolls Royce Plc Electric Machines
JP1682810S (en) * 2020-08-11 2023-03-28 rectifier
JP1682812S (en) * 2020-08-11 2021-04-05 rectifier
JP1682811S (en) * 2020-08-11 2021-04-05 rectifier
JP1682813S (en) * 2020-08-11 2021-04-05 rectifier
US11661646B2 (en) 2021-04-21 2023-05-30 General Electric Comapny Dual phase magnetic material component and method of its formation
US11926880B2 (en) 2021-04-21 2024-03-12 General Electric Company Fabrication method for a component having magnetic and non-magnetic dual phases

Family Cites Families (124)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US555722A (en) * 1896-03-03 Thomas corscaden
US911713A (en) 1906-05-03 1909-02-09 Allis Chalmers Method of and means for securing in position conductors of electromagnetic structures.
US1756672A (en) 1922-10-12 1930-04-29 Allis Louis Co Dynamo-electric machine
FR1555855A (en) 1967-12-20 1969-01-31
US3707638A (en) 1970-03-09 1972-12-26 Alumina Ferrite Corp Electric motor utilizing a ferrite stator of low coerciveness, ferrite rotor of high coerciveness, and photo-electric commutation
US3753068A (en) 1971-11-09 1973-08-14 Electro Craft Corp Controlled speed electric motor
US3812441A (en) 1971-12-03 1974-05-21 Nippon Automation Kk Reed switch mechanism making use of heat-sensitive ferrite
US4039910A (en) 1973-09-10 1977-08-02 The Garrett Corporation Dynamoelectric machine
FR2257896B1 (en) 1974-01-15 1976-04-30 Crouzet Sa
US4004202A (en) 1975-01-29 1977-01-18 Imc Magnetics Corporation Brushless D.C. motor
US4250128A (en) 1975-01-29 1981-02-10 Magna Motors Corporation Processes and apparatuses for preparing permanent magnet stators
US4025840A (en) 1975-04-09 1977-05-24 General Electric Company Permanent magnet generator with output power adjustment by means of magnetic shims
US4032807A (en) 1976-01-06 1977-06-28 General Electric Company Inside-out motor/alternator with high inertia smooth rotor
US4190794A (en) 1978-03-20 1980-02-26 Kreso Mikulic Alternating current motor with adjustable output torque by means of adjustable magnetic bars
US4392072A (en) 1978-09-13 1983-07-05 General Electric Company Dynamoelectric machine stator having articulated amorphous metal components
US4237395A (en) 1978-10-30 1980-12-02 Loudermilk Billy E Electric dynamotor
CA1144970A (en) 1979-07-05 1983-04-19 Arnold D. Peterson Permanent magnet generator with temperature compensating nickel iron alloy strips in winding slots
US4311932A (en) * 1980-01-28 1982-01-19 Sundstrand Corporation Liquid cooling for induction motors
JPS56129566A (en) 1980-03-17 1981-10-09 Oki Electric Ind Co Ltd Motor
US4445061A (en) 1980-06-17 1984-04-24 Synetron Corporation Wide air gap permanent magnet motors
US4346335A (en) 1981-04-07 1982-08-24 Mcinnis Stirling A Speed control of a D.C. electric motor
US4511831A (en) 1981-04-07 1985-04-16 Mcinnis Stirling A Speed control of a D.C. electric motor
US4547713A (en) 1982-11-05 1985-10-15 Kollmorgen Technologies Corporation Toroidally wound brushless DC motor
JPS59129558A (en) 1983-01-14 1984-07-25 Hitachi Ltd Variable speed rotary electric machine
EP0129049B1 (en) 1983-05-20 1988-07-27 Alcatel N.V. Electronically commutated d.c. motor
US4492902A (en) 1983-06-03 1985-01-08 Allied Corporation Permanent magnetic motor common leg impedance compensation means
US4562399A (en) 1983-06-14 1985-12-31 Kollmorgen Technologies Corporation Brushless DC tachometer
US4625135A (en) 1983-07-19 1986-11-25 The Garrett Corporation Permanent magnet rotor
GB8414953D0 (en) 1984-06-12 1984-07-18 Maghemite Inc Brushless permanent magnet dc motor
US4887020A (en) 1984-07-23 1989-12-12 U.S. Philips Corporation Self-compensating brushless alternator
US4617726A (en) 1984-12-06 1986-10-21 The Garrett Corporation Maximum stiffness permanent magnet rotor and construction method
US4852245A (en) 1985-11-20 1989-08-01 Allied-Signal Inc. Toothless stator electrical machine construction method
US4709180A (en) 1985-11-20 1987-11-24 The Garrett Corporation Toothless stator construction for electrical machines
US5030877A (en) 1985-11-20 1991-07-09 Allied-Signal Inc. Turbine engine with integral clam shell dynamoelectric machine
KR940001991B1 (en) 1986-02-03 1994-03-12 산덴 가부시기가이샤 Appartus for preventing heat damage in an electromagnetic clutch
JPS63198776A (en) 1987-02-12 1988-08-17 Nissan Motor Co Ltd Starting motor for internal combustion engine
US4763034A (en) 1987-07-10 1988-08-09 Sigma Instruments, Inc. Magnetically enhanced stepping motor
FR2618616B1 (en) 1987-07-20 1990-11-30 Sobiepanek Janusz ELECTRIC MACHINE WITH HIGH DRIVE AND / OR POSITIONING TORQUE
DE3888970T2 (en) 1987-09-15 1994-09-15 Cadac Holdings Ltd ENGINE OR GENERATOR.
NZ221822A (en) 1987-09-15 1990-02-26 Clark Automotive Dev Permanent magnet motor
US5214839A (en) 1989-05-19 1993-06-01 General Electric Company Method of making dynamoelectric machines including metal filled glass cloth slot closure wedges
US5124607A (en) 1989-05-19 1992-06-23 General Electric Company Dynamoelectric machines including metal filled glass cloth slot closure wedges, and methods of making the same
US5184040A (en) 1989-09-04 1993-02-02 Lim Jong H Electric power generators having like numbers of magnets and coils
US4994700A (en) * 1990-02-15 1991-02-19 Sundstrand Corporation Dynamoelectric machine oil-cooled stator winding
US5208503A (en) 1991-04-12 1993-05-04 Hisey Bradner L Energy-efficient ferromagnetic stator and core apparatus
GB2264812B (en) 1992-03-04 1995-07-19 Dowty Defence & Air Syst Electrical power generators
US5955809A (en) 1992-08-17 1999-09-21 Intellectual Property Law Department Sundstrand Corporation Permanent magnet generator with auxiliary winding
US5304883A (en) 1992-09-03 1994-04-19 Alliedsignal Inc Ring wound stator having variable cross section conductors
JP3430521B2 (en) 1992-09-24 2003-07-28 松下電器産業株式会社 Rotating electric machine stator
US5397948A (en) 1993-03-12 1995-03-14 Nartron Corporation Magnetic motor with temperature related activation
JP3355700B2 (en) 1993-06-14 2002-12-09 松下電器産業株式会社 Rotating electric machine stator
US5585682A (en) 1993-11-10 1996-12-17 Sundstrand Corporation Thermally compensated assembly for a generator
US5555722A (en) 1993-11-15 1996-09-17 Sundstrand Corporation Integrated APU
DE69408697T2 (en) 1993-12-15 1998-07-02 Allied Signal Inc REDUNDANT ELECTRIC MOTOR ARRANGEMENT WITH A ROTOR HAVING TWO MAGNET PARTS
US5455470A (en) 1994-03-17 1995-10-03 Alliedsignal Inc. Electrical machines and components thereof incorporating foil journal bearings
US5519275A (en) 1994-03-18 1996-05-21 Coleman Powermate, Inc. Electric machine with a transformer having a rotating component
US5714823A (en) 1994-08-29 1998-02-03 Sundstrand Corporation Quasi regulated permanent magnet generator
US5917248A (en) 1995-01-31 1999-06-29 Denso Corporation System and method for driving electric vehicle
US5853513A (en) 1995-02-22 1998-12-29 Mobile Storage Technology Inc. Method of producing a stator for a disk drive motor
US5570503A (en) * 1995-04-28 1996-11-05 General Electric Company Method for making an electric motor stator
US5742106A (en) 1995-08-28 1998-04-21 Mikuni Corporation Thermo-sensitive actuator and idle speed controller employing the same
JP3881047B2 (en) 1995-10-31 2007-02-14 株式会社デンソー Starter
US5758709A (en) 1995-12-04 1998-06-02 General Electric Company Method of fabricating a rotor for an electric motor
FR2743456B1 (en) 1996-01-04 1998-02-06 Thomson Csf SYNCHRONOUS TYPE ELECTRIC MOTOR WITH PERMANENT MAGNETS AND VEHICLE COMPRISING SUCH A MOTOR
US5798596A (en) 1996-07-03 1998-08-25 Pacific Scientific Company Permanent magnet motor with enhanced inductance
US6100620A (en) 1996-08-05 2000-08-08 S.H.R. Ltd. Bvi High frequency synchronous rotary electrical machine
US5912522A (en) 1996-08-22 1999-06-15 Rivera; Nicholas N. Permanent magnet direct current (PMDC) machine with integral reconfigurable winding control
FR2753017B1 (en) 1996-08-29 1998-10-16 Imphy Sa STEP BY STEP MOTOR FOR WATCHMAKING WHOSE STATOR IS CONSISTING OF A SOFT MAGNETIC ALLOY AND SOFT MAGNETIC ALLOY
US5825597A (en) 1996-09-25 1998-10-20 General Electric Company System and method for detection and control of circulating currents in a motor
US5925999A (en) 1996-11-13 1999-07-20 Siemens Canada Limited Three-speed dual-winding direct current permanent magnet motor method and apparatus
CA2273944C (en) 1996-12-03 2004-07-06 Elliott Energy Systems, Inc. Electrical system for turbine/alternator on common shaft
US5986379A (en) 1996-12-05 1999-11-16 General Electric Company Motor with external rotor
FR2758018B1 (en) 1996-12-31 2006-06-16 Valeo Electronique ELECTRIC MACHINE OF SYNCHRONOUS TYPE
US6124660A (en) * 1997-05-26 2000-09-26 Denso Corporation AC generator for vehicles
US6137201A (en) * 1997-05-26 2000-10-24 Denso Corporation AC generator for vehicles
DE69830869T2 (en) 1997-05-26 2006-05-24 Denso Corp., Kariya Alternator for motor vehicles
US5942829A (en) 1997-08-13 1999-08-24 Alliedsignal Inc. Hybrid electrical machine including homopolar rotor and stator therefor
US5953491A (en) 1997-09-29 1999-09-14 Alliedsignal Inc. Control system for a permanent magnet motor
US5834874A (en) 1997-09-30 1998-11-10 Outboard Marine Corporation Alternator with mechanically adjustable output
DE69816263T3 (en) * 1997-10-16 2007-09-13 Denso Corp., Kariya METHOD AND DEVICE FOR ROTATING U-FOUR STATOR WINDING POPS
US5962938A (en) 1997-10-21 1999-10-05 General Electric Company Motor with external rotor
US6097124A (en) 1997-10-23 2000-08-01 Satcon Technology Corporation Hybrid permanent magnet/homopolar generator and motor
US5903115A (en) 1997-11-24 1999-05-11 Alliedsignal Inc. Auxiliary system including a plurality of ac motors powered directly by an electric generator
HUP0101186A3 (en) 1997-11-28 2002-03-28 Abb Ab Method and device for controlling the magnetic flux with an auxiliary winding in a rotaing high voltage electric alternating current machine
US6255756B1 (en) 1997-12-01 2001-07-03 General Electric Company Winding arrangement for switched reluctance machine based internal starter generator
JPH11215748A (en) 1998-01-23 1999-08-06 Toshiba Corp Permanent magnet type rotating machine
US6437529B1 (en) 1998-05-04 2002-08-20 Comair Rotron, Inc. Multi-stator motor with independent stator circuits
US6242840B1 (en) 1998-06-15 2001-06-05 Alliedsignal Inc. Electrical machine including toothless flux collector made from ferromagnetic wire
JP3559891B2 (en) 1998-06-22 2004-09-02 日産自動車株式会社 Cooling structure of multilayer motor
FR2780580B1 (en) 1998-06-25 2000-11-10 Valeo Equip Electr Moteur ROTATING MACHINE, SUCH AS AN ALTERNATOR FOR A MOTOR VEHICLE
JP3279279B2 (en) 1998-06-30 2002-04-30 三菱電機株式会社 Iron core equipment
US6246561B1 (en) 1998-07-31 2001-06-12 Magnetic Revolutions Limited, L.L.C Methods for controlling the path of magnetic flux from a permanent magnet and devices incorporating the same
JP3284981B2 (en) * 1998-11-02 2002-05-27 株式会社デンソー Method for manufacturing vehicle alternator and stator thereof
JP2000166152A (en) 1998-11-20 2000-06-16 Mitsubishi Electric Corp Stator of ac generator for vehicle and its manufacture
US6225725B1 (en) * 1999-02-08 2001-05-01 Itoh Electric Co. Ltd. Manufacturing process of a divided type stator
US6541887B2 (en) 1999-03-12 2003-04-01 Hideo Kawamura Permanent-magnet motor-generator with voltage stabilizer
JP4450124B2 (en) * 1999-06-25 2010-04-14 株式会社デンソー Rotating electric machine and manufacturing method thereof
US6373162B1 (en) 1999-11-11 2002-04-16 Ford Global Technologies, Inc. Permanent magnet electric machine with flux control
DE50015828D1 (en) 1999-12-08 2010-02-04 Ebm Papst St Georgen Gmbh & Co Electronically commutated DC motor
JP3383251B2 (en) 1999-12-27 2003-03-04 三菱電機株式会社 Vehicle alternator stator
US6313560B1 (en) 1999-12-20 2001-11-06 Pratt & Whitney Canada Corp. Thermally protected electric machine
TW508891B (en) 2000-02-21 2002-11-01 Misubishi Electric Corp Stator iron core of electric motor, manufacturing method thereof, electric motor, and compresor
US6333622B1 (en) 2000-05-16 2001-12-25 General Electric Company Synchronous generator having auxiliary power windings and variable frequency power source
JP3419755B2 (en) 2000-11-10 2003-06-23 三菱電機株式会社 Method of manufacturing stator for vehicle alternator
JP2002153029A (en) 2000-11-13 2002-05-24 Denso Corp Reluctance motor
US6683398B2 (en) 2000-12-01 2004-01-27 General Electric Company Generator magnetic armature wedge
JP3603784B2 (en) 2000-12-14 2004-12-22 日産自動車株式会社 Rotating electric machine
JP3624825B2 (en) 2000-12-14 2005-03-02 日産自動車株式会社 Rotating electric machine and method of manufacturing rotating electric machine
US6700242B2 (en) 2000-12-28 2004-03-02 Hideo Kawamura Magnetic flux controls for permanent-magnet motor-generator
US6984914B2 (en) 2000-12-28 2006-01-10 Matsushita Electric Industrial Co., Ltd. Motor having characteristic structure in armature and disc apparatus
KR100392308B1 (en) 2000-12-29 2003-07-23 한국전기연구원 An integrated apparatus of permanent magnet excited synchronous motor and non-contact power feed device
US20020093269A1 (en) 2001-01-16 2002-07-18 Harter Bernard G. Slot area undercut for segmented stators
US20020149281A1 (en) 2001-04-17 2002-10-17 Moteurs Leroy-Somer Stator for an electric machine
JP2002325382A (en) 2001-04-26 2002-11-08 Mitsubishi Electric Corp Manufacturing method of dynamo-electric machine and dynamo-electric machine
JP3593059B2 (en) 2001-05-28 2004-11-24 三菱電機株式会社 AC generator for vehicles
JP3676262B2 (en) 2001-06-05 2005-07-27 英男 河村 Generator with multiple power generation characteristics
JP3816789B2 (en) 2001-11-26 2006-08-30 アスモ株式会社 Stator for rotating magnetic field type motor and method for manufacturing the same
JP2003180044A (en) 2001-12-07 2003-06-27 Okuma Corp Stator and its manufacturing method
JP2003199267A (en) 2001-12-28 2003-07-11 Toshiba Corp Stator for rotating electric machine
JP3828015B2 (en) 2002-01-08 2006-09-27 三菱電機株式会社 Permanent magnet type motor, method of manufacturing permanent magnet type motor, compressor and refrigeration cycle apparatus
JP3839738B2 (en) 2002-03-07 2006-11-01 フジセラテック株式会社 Self-voltage controlled permanent magnet generator
US7119467B2 (en) * 2003-03-21 2006-10-10 Pratt & Whitney Canada Corp. Current limiting means for a generator
US6965183B2 (en) * 2003-05-27 2005-11-15 Pratt & Whitney Canada Corp. Architecture for electric machine
US7081697B2 (en) * 2004-06-16 2006-07-25 Visteon Global Technologies, Inc. Dynamoelectric machine stator core with mini caps

Also Published As

Publication number Publication date
US7436098B2 (en) 2008-10-14
US7656067B2 (en) 2010-02-02
JP2006521077A (en) 2006-09-14
US20050184615A1 (en) 2005-08-25
US7119467B2 (en) 2006-10-10
US20040183392A1 (en) 2004-09-23
EP1609227B1 (en) 2010-07-07
DE602004027997D1 (en) 2010-08-19
CA2519478C (en) 2012-02-21
US20080018189A1 (en) 2008-01-24
US7309939B2 (en) 2007-12-18
WO2004084378A1 (en) 2004-09-30
US20080315706A1 (en) 2008-12-25
EP1609227A1 (en) 2005-12-28

Similar Documents

Publication Publication Date Title
CA2519478A1 (en) Current limiting means for a generator
Owen et al. Hybrid-excited flux-switching permanent-magnet machines with iron flux bridges
ATE293848T1 (en) MULTIPOLE ELECTRIC MOTOR/GENERATOR WITH AXIAL MAGNETIC FLOW
SE0001302D0 (en) An electric machine
JP2002218729A (en) System combined with permanent magnet excited synchronous motor and noncontact power supply
US6920023B2 (en) Current limiting means for a generator
SE0202419D0 (en) An electric machine and its use
US20180323664A1 (en) Permanent magnet based electric machine having enhanced torque
KR100664091B1 (en) Self magnetizing motor and method for winding main coils and sub coils on stator thereof
US1227414A (en) Dynamo-electric machine.
JPH11308792A (en) Permanent magnet type reluctance rotating machine
RU2002132801A (en) Independent magnetoelectric station of alternating current, for movable and immovable objects
KR100956929B1 (en) electric power device
WO2013067605A2 (en) New system excitation of classical synchronous generators
RU2321938C1 (en) Single-phase ac motor
Walters The repair of low tension induction motors-Best practices to maintain energy efficiency
WO2010094993A1 (en) Pulse generator (versions)
RU2107375C1 (en) Commutator machine stator
RU95431U1 (en) CABINET DISTRIBUTION WITH TOROID FERROMAGNETIC MULTILAYER COILS OF ELECTRICITY SAVING IN A THREE-PHASE SYSTEM OF DISTRIBUTION OF ELECTRIC POWER DISTRIBUTION OF INDUSTRIAL ENTERPRISES
PL229377B1 (en) Auxiliary winding in an electric machine
KR20160041986A (en) Electric machine winding with center coil
RU2003124088A (en) ALTERNATOR
TH63303A (en) Three-phase AC rotary electromechanical machine using permanent magnets.
RU2004124018A (en) INDUCTIVE-STATIC METHOD FOR ELECTRIC ENERGY GENERATION AND DEVICE FOR ITS IMPLEMENTATION
KR970008792A (en) How to configure reverse current induction magnetic blocking of generator

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20220301

MKLA Lapsed

Effective date: 20200831