A) after a change of {TAIL ~ the rotor position signal} , which change is associated with a change between two rotor poles and follows a commutation of the current through {HEAD ~ the at least one phase} , which change is referred to hereinafter as a first pole change, a first value of the motor current is ascertained 
A ) after a change of { TAIL ~ the rotor position signal } , which change is associated with a change between two rotor poles and follows a commutation of the current through { HEAD ~ the at least one phase } , which change is referred to hereinafter as a first pole change , a first value of the motor current is ascertained
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH