Rotary machine

A rotary machine comprising

• a stator and a rotatably mounted rotor configured to move relative to the stator, one or more magnetic field sensors arranged stationary relative to the stator at a radial distance from an axis which is stationary relative to the stator, at least one measuring device, which configured to detect magnetic field changes with the aid of the aforementioned magnetic field sensors;
• a rotor configured to generate one or more electrical signals in each case with one or more constant magnetic source voltages and with one or more of the magnetic field sensors, said electrical signals having signal components which correspond to the rotor rotation frequency and to the distance between the magnetic field sensor and the rotor in each case;
• and
• a demodulator unit configured to carry out a demodulation of signals generated by or derived from the magnetic field sensors, said signals having signal components which correspond to the rotor rotational frequency and to a respective distance between the magnetic field sensor and rotor, such that a signal is generated which corresponds to the distance between the rotor and the magnetic field sensor assigned to the specific signal.