D) as a function of any deviation between the first value and second value , the value for the predetermined time span is modified in order to bring about, when {HEAD ~ this modified value} is used during {TAIL ~ commutation control}, an improved equalization of the first value for the motor current and the second value for the motor current 
is used during
D ) as a function of any deviation between the first value and second value , the value for the predetermined time span is modified in order to bring about , when { HEAD ~ this modified value } is used during { TAIL ~ commutation control } , an improved equalization of the first value for the motor current and the second value for the motor current
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