A process for the determination of the rotary position of the rotor of a mechanically commutated direct current - servomotor

摘要

A method for determining the rotational position of a rotor of a mechanically commutated direct current - servomotor (5), which in the transverse branch of a bridge circuit is arranged and the armature current by an electromechanically actuated switching device (28) is predetermined,- with a control - and evaluation unit (17) which, in the armature current (2) and contained on the mechanical commutation ripple (3) to be returned to evaluates,characterized by the,- that of each switching contact (6, 7) of the switching device (28) of the linkage means 17-20 could by means of a return of the switching circuit (20) in each case one contact voltage - feedback signal (9, 10) - on the control and evaluation device (17) is recycled and- - that the control and evaluation unit (17) with the use of the at least one contact voltage - feedback signal (9, 10) a contact vibration - time interval (4) is determined, and during this contact vibration - time interval (4), in which an evaluation of the ripple on the basis of contact to vibrations, which by means of a switching process, at least one of the switching contacts (6, 7) are caused, is not possible, an estimate of ripple (3) performs.