Abstract: In accordance with the present disclosure, a personal care device has a handle section allowing a user to grasp the personal care device with a hand, a head section for providing a personal care treatment to a personal care area, the head section being detachably attached to the handle section, a drive unit having a motor for driving at least a portion of the head section into motion, a controller arranged and/or structured for (a) providing a periodic driving signal at the motor, the periodic driving function essentially being adaptable by a controllable weighting factor, (b) determining at least one phase-shift value between the periodic drive signal and a periodic motor response signal, and (c) determining, based on the determined phase-shift value, (c1) whether the head section is attached to the handle section, and/or (c2) a type of the head section being attached to the handle section, and/or (c3) a state of wear of the head section being attached to the handle section.

Abstract: A motor unit having a motor having a stator and an armature, the armature being arranged for relative driven motion with respect to the stator. A motor control unit has a supply circuit for providing a supply voltage at the motor to provide a set power level to the motor for driving the armature into motion. A measurement circuit is measuring a value of a physical variable indicative of a current flow through the motor, The motor control unit is arranged to interrupt the provision of the supply voltage by the supply circuit and to dynamically brake the motor during a braking time interval and further to measure the value of the physical variable during the braking time interval.

Abstract: A motor unit having a motor having a stator and an armature, the armature being arranged for relative driven motion with respect to the stator. A motor control unit has a supply circuit for providing a supply voltage at the motor to provide a set power level to the motor for driving the armature into motion. A measurement circuit is measuring a value of a physical variable indicative of a current flow through the motor, The motor control unit is arranged to interrupt the provision of the supply voltage by the supply circuit and to dynamically brake the motor during a braking time interval and further to measure the value of the physical variable during the braking time interval.