Rotating electric motor system capable of vibrating and method for operating a rotating electric motor capable of vibrating

A method for operating a rotating electric motor (7) capable of vibrating having a rotor and a stator, the rotor and the stator forming a unit capable of vibrating, the method comprising the steps of:

• (a) producing a control signal having a continuous component for rotating the rotor with respect to the stator, and an alternating component for vibrating the electric motor;
• (b) producing a power signal in response to the control signal produced in step (a), for powering the electric motor (7);
• and
• (c) powering the electric motor with the power signal for vibrating the electric motor (7) in response to the alternating component of the control signal and rotating the rotor in response to the continuous component of the control signal;
• wherein the alternating component of the control signal produced in step (a) is for inducing mechanical vibrations in the unit capable of vibrating within an audible frequency range.