Patent ID: 7656107

Claim:
A control circuit for an arrangement having at least two direct current motors that are connectable in parallel to a direct voltage system, in particular for controlling at least two fan motors of a motor vehicle blower, wherein the direct current motors ( 10 , 12 ) are connectable jointly to the direct voltage system ( 16 , 18 ) on the one hand upon starting, each via a respective low-resistance protective resistor ( 22 , 24 ) and one common semiconductor circuit element ( 26 ), and on the other, in operation, are connectable via separate semiconductor circuit elements ( 30 , 32 ), and the series circuit of the separate protective resistors ( 22 , 24 ) and the common semiconductor circuit element ( 26 ) is located parallel to the separate semiconductor circuit elements ( 30 , 32 ) for controlling the motor in operation, and the at least two direct current motors ( 10 , 12 ) with different capacities are connectable to the direct voltage system ( 16 , 18 ) via different-sized protective resistors ( 22 , 24 ), and the smaller protective resistor is connected in series with the direct current motor having the greater capacity.