| 摘要 |
PROBLEM TO BE SOLVED: To provide a monitoring device for highly accurately monitoring, with a simple configuration, a presence or absence of abnormality in current supplied to an electric motor from a commercial power supply.SOLUTION: A monitoring device 100 monitors a presence or absence of abnormality in an input current inputted in a control device 20 or an output current outputted from the control device 20, and is provided with: a reception unit 110 that receives an output AC current measured by current sensors 40, 50 for measuring the output AC current outputted from the control device 20; and a monitoring unit 120 that executes Fourier transformation on the output AC current received by the reception unit 110, and monitors a presence or absence of abnormality in the input current or the output current on the basis of a result of the execution. |
