Patent ID: 7843102

Claim:
Combination of an electrical direct current motor and a control circuit for the electrical direct current motor, comprising: at least two stators ( 3 , 30 ) included in the electrical direct current motor, wherein said at least two stators are arranged coaxial to each other and with an angular offset (a) to each other, a plurality of winding teeth ( 7 , 32 ) for each one of said two stators, said plurality of winding teeth ( 7 , 32 ) comprising windings and wherein all windings of the each one of said two stators are connected in series as a phase winding ( 36 a , 36 b ), arranged at the circumference of the at least one stator ( 3 , 30 ), the winding teeth comprising windings and wherein all windings of a stator are connected in series, a rotor ( 1 ) for the electrical direct current motor, a plurality of permanent magnets ( 5 ) arranged on the circumference of the rotor ( 1 ) and/or a plurality of rotor winding teeth arranged on the circumference of the rotor, wherein the rotor winding teeth comprise rotor windings, wherein the poles (N, S) of the permanent magnets ( 5 ) and/or the winding direction of the rotor windings alternate in radial direction, a controller ( 42 ) included in the control circuit for controlling power switches ( 48 ), and four power switches ( 48 ) included in the control circuit for each one of the at least two phase windings ( 36 a , 36 b ) of the motor.