| 摘要 |
The invention relates to a circuit arrangement and a method for operating an electric motor in a direct voltage source, in particular for operating a permanent-magnet-excited DC motor in the direct voltage network of a motor vehicle, having a rotary position transducer ( 32 ) for detecting the rotary position of the rotor ( 20 ), and having an electronic commutation controller ( 32 ) for switching over the current in the armature winding of the stator ( 12 ) as a function of the position of the rotor ( 20 ). It is proposed that the rotary position transducer ( 32 ) is positioned relative to the stator ( 12 ) for an early commutation, and that the actual commutation time can be set by means of a delay correction, ascertained by measurement separately for each motor ( 10 ), in the electronic commutation controller ( 30 ).
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