Motor monitoring device

Abstract

A motor monitoring device according to one aspect of the present disclosure comprises: a rotational speed acquisition unit that acquires the rotational speed of a motor of a machine tool; an output value acquisition unit that acquires the output value of the motor; a state value acquisition unit that acquires a state value indicating the state of the motor; and a graph display unit that plots a marker indicating a combination of the rotational speed and the output value in a graph region in which one axis is the rotational speed and the other axis is the output value. The graph display unit comprises: a graph region setting unit which, with regard to anticipated combinations of the rotational speed and the output value, divides the graph region into a plurality of load zones with different load levels on the basis of a plurality of time ratings of the motor, and displays the plurality of load zones in an identifiable manner; and a plotting unit that changes and plots the mode of the marker according to the state value.

Dependencies are inferred from the claim text.