Patent ID: 11881799
Assignee: THE BRAUN CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  A | IPC A  H

Claim 13:
14. A method of controlling a motor unit of a personal care device, comprising the steps of:
providing a motor having a stator and an armature arranged for relative driven motion with respect to the stator;
supplying a set power level at the motor to drive the armature into motion, by supplying a pulse-width modulated supply voltage at the motor;
dynamically braking the motor during a braking time interval;
measuring a value of a physical variable indicative of a current flow through the motor within the braking time interval;
comparing the value of the physical variable with a target value, which target value depends on the set power level and an intended amplitude of the motion of the armature;
determining a new set power level in dependence on the comparison result; and
subsequently providing the new set power level to the motor.