Patent ID: 6891348
Filing Date: 2005-05-10
Classification: H02K,H02P

Abstract:
1. Electric motor ( 1 ) for driving members that rotate at speeds of greater than 40 000 revolutions per minute, comprising a stator ( 2 ) housing induction coils ( 3 i ), a rotor ( 4 ) supporting multiple permanent magnets ( 5 , 6 ) and located coaxially inside the stator ( 2 ), and multiple Hall sensors ( 7 ′, 7 ″, 7 ′″, integral with the stator ( 2 ) and capable of detecting the position of one or more points on the rotor ( 4 ) as it rotates in order appropriately to time the injection of the induction currents into the said coils ( 3 i ) as a function of the position of the permanent magnets ( 5 , 6 ), which motor is characterized in that it is provided with: a) means capable of deactivating all but one ( b) means capable of measuring the speed of rotation ω c) means capable of bringing about in the next or (n+1)th revolution of the rotor ( the said electric motor (