VERFAHREN UND ANORDNUNG ZUR ERMITTLUNG DES VON EINEM MOTOR AUF EINE ROTIERENDE LAST WIRKENDEN LASTMOMENTES

For the determination of the torque which is applied by a motor 1 or an i.c. engine to a rotating load 4, the change of the motor driving moment in dependence on the value of a measurable operational parameter, such as the motor current of an electric motor, measured at 5 in Figure 2, or the intake pressure of an i.c. engine, is stored in a memory 13; speeds are measured e.g. by counters 8, 9 after predetermined intervals of time controlled by a clock 10, the difference between each two consecutive speed measurements, is formed at 11 and is divided by the predetermined interval of time at 12, the resulting quotient is multiplied by a factor which is proportional to the total moment of inertia, the motor driving moment corresponding to the instantaneous value of the operational parameter being read from the memory 13, and the product obtained by the multiplication by the above-mentioned factor is subtracted from said instantaneous value at 14.