Patent ID: 7038407

Claim:
A circuit arrangement for operating an electric motor in a direct voltage source, having a rotary position transducer for detecting the rotary position of the rotor, and having an electronic commutation controller for switching over the current in the armature winding of the stator as a function of the position of the rotor, wherein the rotary position transducer ( 32 ) is positioned relative to the stator ( 12 ) for an early commutation, and wherein the actual commutation time can be set by means of a delay correction, ascertained by measurement for the motor, in the electronic commutation controller ( 30 ), wherein the amount of the delay between the signal of the rotary transducer ( 32 ) and the signal output of the commutation controller ( 30 ) is ascertained by a measuring device ( 34 ) and stored in a permanent memory (T) of the commutation controller ( 30 ).