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WO1990009698A3 - Revolving field motor excited by permanent magnets - Google Patents

Revolving field motor excited by permanent magnets Download PDF

Info

Publication number
WO1990009698A3
WO1990009698A3 PCT/EP1990/000168 EP9000168W WO9009698A3 WO 1990009698 A3 WO1990009698 A3 WO 1990009698A3 EP 9000168 W EP9000168 W EP 9000168W WO 9009698 A3 WO9009698 A3 WO 9009698A3
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnets
revolving field
excited
subnumerary
supernumerary
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.)
Ceased
Application number
PCT/EP1990/000168
Other languages
German (de)
French (fr)
Other versions
WO1990009698A2 (en
Inventor
Wilfried Leutner
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of WO1990009698A2 publication Critical patent/WO1990009698A2/en
Publication of WO1990009698A3 publication Critical patent/WO1990009698A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention concerns revolving field motors with fractional slot winding, which are excited by permanent magnets. A problem associated with these electric motors is a high stopping torque which is undesirable in particular when the current-free motor is racing due to an external torque. To solve this problem, it is proposed that the stopping torque of each individual permanent magnet (5, 6) is symmetrical within each half division (b), defined as the angular distance between the median planes of a ridge (2) and an adjacent groove (3) of the stator (1), about the median plane of the half division (b), and that an odd number of supernumerary or subnumerary grooves is present. In a proposed complement or alternative, the number of permanent magnets (5, 6) chosen has no common factor with the number of supernumerary or subnumerary grooves. Possible fields of application are all drives with revolving field motors excited by permanent magnets.
PCT/EP1990/000168 1989-02-08 1990-01-31 Revolving field motor excited by permanent magnets Ceased WO1990009698A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3903629.4 1989-02-08
DE3903629 1989-02-08

Publications (2)

Publication Number Publication Date
WO1990009698A2 WO1990009698A2 (en) 1990-08-23
WO1990009698A3 true WO1990009698A3 (en) 1990-11-01

Family

ID=6373592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/000168 Ceased WO1990009698A2 (en) 1989-02-08 1990-01-31 Revolving field motor excited by permanent magnets

Country Status (1)

Country Link
WO (1) WO1990009698A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2726948B1 (en) * 1994-11-16 1996-12-20 Wavre Nicolas PERMANENT MAGNET SYNCHRONOUS MOTOR
US5910691A (en) * 1995-03-20 1999-06-08 Wavre; Nicolas Permanent-magnet linear synchronous motor
JPH08308154A (en) * 1995-04-28 1996-11-22 Toyota Motor Corp Motor
AU2003210832A1 (en) 2002-02-19 2003-09-09 Parker-Hannifin Corporation Linear motor with magnet rail support

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060894A1 (en) * 1980-09-25 1982-09-29 Fanuc Ltd. D.c. generator type non-contact speed sensing device
EP0128961A1 (en) * 1982-12-24 1984-12-27 Fanuc Ltd. Synchronous motor
JPS62185545A (en) * 1986-02-07 1987-08-13 Toshiba Corp Rotary electric machine
JPS62221852A (en) * 1986-03-19 1987-09-29 Aichi Tokei Denki Co Ltd electric body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060894A1 (en) * 1980-09-25 1982-09-29 Fanuc Ltd. D.c. generator type non-contact speed sensing device
EP0128961A1 (en) * 1982-12-24 1984-12-27 Fanuc Ltd. Synchronous motor
JPS62185545A (en) * 1986-02-07 1987-08-13 Toshiba Corp Rotary electric machine
JPS62221852A (en) * 1986-03-19 1987-09-29 Aichi Tokei Denki Co Ltd electric body

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 30 (E-578)(2877) 28 Januar 1988, & JP-A-62 185545 (TOSHIBA) 13 August 1987, siehe das ganze Dokument *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 85 (E-591)(2932) 17 März 1988, & JP-A-62 221852 (AICHI TOKEI DENKI) 29 September 1987, siehe das ganze Dokument *

Also Published As

Publication number Publication date
WO1990009698A2 (en) 1990-08-23

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