Vacuum pump and control device

A control device of a vacuum pump including:

• a rotor blade that sends a gas sucked through an inlet port to an outlet port;
• a motor that rotates/drives the rotor blade;
• a rotational speed measuring means that measures a rotational speed of the rotor blade;
• and
• a current measuring means that measures a current flowing through the motor, the device comprising:
• a first region defined such that a current measured value measured by the current measuring means is equal to or larger than a current specified value and a rotational speed measured value measured by the rotational speed measuring means is equal to or larger than a rotational speed specified value;
• a second region defined such that the current measured value is less than the current specified value or the rotational speed measured value is less than the rotational speed specified value;
• a region determining means that determines to which region of the first region and the second region the rotational speed measured value and the current measured value belong;
• and
• a calculating means that calculates a risk degree of a failure of the vacuum pump based at least on one or more determinations by the region determining means.