Device management system for inverter compressor

A device management system for an inverter compressor provided with a motor configured to be driven by an inverter, the device management system comprising:

• a partial discharge detector configured to detect a voltage of the motor to detect a partial discharge that occurs in the motor;
• a determination module configured to determine whether there is a risk of occurrence of the partial discharge or not, or whether the partial discharge occurs or not based on a result of detection by the partial discharge detector,
• wherein when the voltage detected by the partial discharge detector is higher than a first threshold, the determination module determines that there is a risk of the occurrence of the partial discharge or the partial discharge occurs, and performs a protective operation to reduce the risk of the occurrence of the partial discharge in the motor or the occurrence of the partial discharge in the motor;
• a pressure sensor configured to detect a pressure of refrigerant in a refrigerate pipe on a suction side or a discharge side of the inverter compressor;
• and
• a storage module storing a data table indicating the first threshold for each of pressures of the refrigerant each of which is detected by the pressure sensor,
• wherein the determination module is configured to extract the first threshold associated with the pressure from the data table based on the pressure of the refrigerant that is detected by the pressure sensor, and use the first threshold.