Turbomolecular vacuum pump and associated method

A turbomolecular vacuum pump comprising:

• a stator;
• a rotor configured to rotate in the stator;
• a motor configured to drive the rotation of the rotor;
• a temperature sensor configured to measure a temperature of the rotor;
• and
• a creep maintenance counter having a memory in which there are stored a value for a creep of the rotor and a correspondence table providing values for the creep of the rotor over time as a function of the temperature and a rotational speed of the rotor, the creep maintenance counter being configured to:
• determine an increment for the creep of the rotor over a predetermined period of time based on the temperature of the rotor measured by the temperature sensor, the rotational speed of the rotor, the value for the creep of the rotor, and the correspondence table,
• increment the value for the creep of the rotor by the determined increment for the creep, and
• determine, based on the incremented value for the creep, information representative of a period of time remaining before preventative maintenance of the rotor for creep.