Compressor, monitoring system, and method of monitoring compressor

Abstract

A compressor, a monitoring system and a method of monitoring a compressor that make it possible to monitor the remaining lifetime of a semiconductor element of a motor control system while the processing load is reduced are provided. A compressor () includes: a motor control system () that controls the rotation speed of a motor (); a compressor body () that compresses air by being driven by the motor (); a pressure sensor () that is provided on the discharge side of the compressor body (); and a running controller () that performs switching between load running and no-load running on the basis of the pressure sensed by the pressure sensor (). A motor controller () of the motor control system () calculates a relative temperature of a semiconductor element relative to a reference temperature by using a temperature of the semiconductor element sensed by a temperature sensor () at the time of switching from no-load running to load running, and calculates an amount of change in a remaining lifetime of the semiconductor element corresponding to the relative temperature of the semiconductor element, whereby monitoring the remaining lifetime of the semiconductor element.