Method for determining deterioration in foil bearing

Abstract

This method for determining deterioration in a foil bearing that supports a rotor shaft of an electric compressor device comprises: a torque under determination acquisition step for acquiring a torque under determination, which is the torque of the rotor shaft at a startup time or a stopping time; a torque determination step for determining whether the torque under determination is less than or equal to a torque threshold value; and a deterioration determination step for determining that the foil bearing has deteriorated when it has been determined that the torque under determination is less than or equal to the torque threshold value.

Dependencies are inferred from the claim text.