Abnormality determination device, abnormality determination method, and program

Provided is a technique capable of appropriately performing a determination relating to an abnormality of a machine element of a rotary machine. A control device (40) according to one embodiment of the present invention is provided with an abnormality determination unit (403) that performs a determination relating to an abnormality in a mechanical element of a compressor (10) on the basis of an electrical characteristic quantity of the compressor (10) electrically driven by an electric motor (20). The electrical characteristic quantity is a specific frequency component of a signal indicating a physical quantity related to the current of an electric motor (20) that drives the compressor (10), and the specific frequency component is a component that is a predetermined positive integer multiple of the rotational frequency of the compressor (10). An abnormality determination unit (403) performs a determination relating to an abnormality of a mechanical component of a compressor (10) by taking into account a varia