Shaping device and operation of the armature current ripple generated by a direct current motor, in particular to control the positioning

摘要

The present invention relates to a device for shaping the armature current ripple of a direct current motor. According to the invention, the device comprises a phase locked loop 100. In addition, the device preferably comprises means 300 for generating a signal proportional to the back-e.m.f. 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 for generating a signal proportional to the back-e.m.f. of the motor, a voltage controlled oscillator 500 driven by the signal proportional to the back-e.m.f, and a switched capacitor filter 400 is controlled by the output of the oscillator 500, placed upstream of the phase-locked loop 100.