Global Patent Index - EP 2572443 A1

EP 2572443 A1 20130327 - ELECTRIC MACHINE AND METHOD FOR REDUCING A COGGING TORQUE OF AN ELECTRIC MACHINE

Title (en)

ELECTRIC MACHINE AND METHOD FOR REDUCING A COGGING TORQUE OF AN ELECTRIC MACHINE

Title (de)

ELEKTRISCHE MASCHINE UND VERFAHREN ZUR REDUKTION EINES RASTMOMENTS EINER ELEKTRISCHEN MASCHINE

Title (fr)

MACHINE ÉLECTRIQUE ET PROCÉDÉ SERVANT À RÉDUIRE UN COUPLE DE DÉTENTE D'UNE MACHINE ÉLECTRIQUE

Publication

EP 2572443 A1 20130327 (DE)

Application

EP 11728169 A 20110520

Priority

  • AT 8422010 A 20100521
  • AT 8342010 A 20100520
  • AT 2011000233 W 20110520

Abstract (en)

[origin: WO2011143683A1] The invention relates to a method for reducing a cogging torque of an electric machine, in particular a synchronous machine, comprising a rotor/actuator (2), a stator (4) spaced from the rotor/actuator (2) by a gap (3), at least one armature winding (6, 6', 6'') provided on the stator (4) and/or on the rotor/actuator (2), and an exciter part, which is provided on the stator (3) and/or on the rotor/actuator (2) and which produces an exciter field (13) having a fundamental wave in the gap. In order to create advantageous method conditions in order to reduce the cogging torque, a selection of at least one harmonic wave (14) from the harmonic waves (14) related to the fundamental wave (15) is made for the exciter field (13) in order to reduce the cogging torque. The at least one harmonic wave selected, when superposed with the fundamental wave (15), leads to an at least partial reduction of the cogging torque, and the selected wave (14) or selected waves is or are superposed with the fundamental wave (15).

IPC 8 full level

H02K 29/03 (2006.01)

CPC (source: EP)

H02K 29/03 (2013.01); H02K 1/14 (2013.01); H02K 1/2773 (2013.01); H02K 1/278 (2013.01)

Citation (search report)

See references of WO 2011143683A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2011143683 A1 20111124; AT 509968 A1 20111215; AT 509968 B1 20120515; EP 2572443 A1 20130327

DOCDB simple family (application)

AT 2011000233 W 20110520; AT 8422010 A 20100521; EP 11728169 A 20110520