VERFAHREN UND VORRICHTUNG ZUR DIGITALEN BESTIMMUNG DES FELDWINKELS EINER DREHFELDMASCHINE.

摘要

The field angle evaluation appts. is effected by calculating the EMF vector from the measured current and voltage values for the stator, with subsequent integration. A microprocessor provides discontinuous values (W) for the varying frequency of the EMF vector, at a relatively slow clock rate, for controlling an external integrator (INT 1). This provides a quasi-continuous field angle signal at a higher clock rate. The microprocessor pref. obtains the discontinuous frequency values by digital differentiation of the direction angle of the EMF vector.