Abnormality Detection Device And Abnormality Detection Method For Synchronous Reluctance Motor

Abstract: An abnormality detection device (40) is applied to a sensorless control device (100) that performs control to detect rotor position by superimposing a high frequency current on a synchronous reluctance motor (1). The abnormality detection device (40) includes a calculation unit (41) that calculates a physical quantity representing an abnormal state of a rotor (1b) of the synchronous reluctance motor (1) on the basis of the current value of the motor current flowing through the synchronous reluctance motor (1), and a determination unit (42) that determines whether the rotor (1b) is abnormal on the basis of the physical quantity. The abnormality detection device (40) holds a threshold value determined on the basis of a physical quantity when the rotor (1b) is normal. The determination unit (42) determines whether or not there is an abnormality in the rotor (1b) by comparing the physical quantity calculated by the calculation unit (41) with the threshold value.

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents