Patent ID: 6956340
Filing Date: 2005-10-18
Classification: H02P

Abstract:
1. A method of processing data for an electronically commutated motor ( 49 ), which motor comprises a permanent-magnet rotor ( 50 ), an arrangement ( 60 ) for sensing the position of that rotor ( 50 ), and a stator having at least one winding phase ( 33 , 35 ), which motor ( 49 ) has associated with it, in order to control commutation and perform calculation operations, a computer ( 43 ) and a program ( 55 ) to be executed by that computer ( 43 ), comprising the steps of: a) by means of the computer ( b) sensing, in recurrent steps, a rotation-speed-dependent time period (TPP) required by the rotor ( c) monitoring the ratio between that rotation-speed-dependent time period (TPP) and the duration(TCurr) of the current pulses; d) as a function of the magnitude of that ratio, selecting a time to perform, in the computer ( either during the duration (TCurr) of a current pulse or in a time span outside a current pulse.