Patent ID: 8659247
Filing Date: 2014-02-25
Classification: H02P

Abstract:
1. A control device ( 1 ) for controlling an electronically commutated motor ( 3 ), the control device ( 1 ) having a control input ( 7 ) for receiving a rotor position signal representing a position of a rotor ( 5 ) of the motor ( 3 ) and a control output ( 9 ) for connection to field coils ( 11 , 13 , 15 ) of the motor ( 3 ), the control device ( 1 ) configured to generate a load current for moving the rotor ( 5 ) based on the rotor position signal, the load current provided via the control output ( 9 ), the control device ( 1 ) having at least one semiconductor switch ( 17 , 19 , 84 , 86 ) connected to the control output ( 9 ), the semiconductor switch ( 17 , 19 , 84 , 86 ) configured to switch a the load current for moving the rotor ( 5 ) based on a semiconductor control signal, and the control device ( 1 ) having at least one pulse generator ( 10 , 44 , 45 ) with an input side connected to the control input ( 7 ) and an output side connected to the control output ( 9 ), the at least one pulse generator ( 10 , 44 , 45 ) including the at least one semiconductor switch ( 17 , 19 , 84 , 86 ) the pulse generator ( 10 , 44 , 45 ) configured to generate the load current for moving the rotor ( 5 ) in the form of a pulsed control signal such that the pulsed control signal has temporally successive control pulses ( 118 , 119 , 120 ) with a control pulse duration ( 126 ), characterized in that the pulse generator ( 10 , 44 , 45 ) has a delta sigma converter ( 4 ), an input side of the delta sigma converter ( 4 ) being operatively connected, to the control input ( 7 ) and configured to generate the semiconductor control signal in the form of a digital bit stream on the basis of the rotor position signal.