DEVICE FOR SHAPING AND EXPLOITING ARMATURE CURRENT Ripples GENERATED BY A DIRECT CURRENT MOTOR, PARTICULARLY FOR POSITIONING CONTROL

摘要

The present invention relates to a device for shaping the armature current ripples of a direct current motor. According to the invention the device comprises a phase locked loop 100. In addition, preferably the device comprises means 300 capable of generating a signal proportional to the f.c.e.m. of the motor and to control the frequency of the phase locked loop 100 on the basis of the signal thus obtained and / or means 300 capable of generating a signal proportional to the f.c.e.m. of the motor, a voltage controlled oscillator 500 controlled by the signal proportional to the f.c.e.m. and a switched capacitance filter 400 controlled by the output of oscillator 500, placed upstream of the phase locked loop 100. /P