Patent ID: 7676284

Claim:
An electrical motor drive comprising a controllable motor and a speed governor comprised in a control circuit, comprising: a positions signal indicates a position of said motor is derived from said motor; a position determiner continuously determines a rotational position of said motor via the position signal and produces a first output signal; and a load observer responsive to said first output signal and to a second output signal received from said speed governor, wherein a load signal indicative of an estimated load and generated through said load observer is continuously fed into the control circuit downstream of said speed governor, wherein said second output signal, indicative of a control action of the speed governor, is mapped onto a load cycle of said motor via said first output signal, wherein said control action of said speed governor is mathematically integrated and stored in a control, wherein said control memory comprises a plurality of control memory cells, each control memory cell is associated with a position of the motor during its load cycle, and wherein said control action of said speed governor is mapped onto said load cycle of the motor in that said second output signal is accounted for in one of said control memory cells, wherein said one of said control memory cells is selected on account of said first output signal.