PRINTED CIRCUIT BOARD WITH DETERIORATION DETECTION FUNCTION AND MOTOR DRIVE DEVICE WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a printed circuit board capable of accurately predicting time of fault occurrence in response to a device installation environment state.SOLUTION: A printed circuit board according to one embodiment of the present invention formed from an insulating material and configured to mount components and interconnects, comprises: a liquid reservoir part storing a liquid; a pair of deterioration detection interconnects, one end of one of the deterioration detection interconnects being connected to a power supply and the other end thereof being disposed in the liquid reservoir part, one end of the other deterioration detection interconnect being connected to a ground via a resistor and the other end thereof being disposed in the liquid reservoir part; a voltage detection circuit detecting a voltage between the one end of the one deterioration detection interconnect and the one end of the other deterioration detection interconnect; and a deterioration determination circuit determining whether insulation between the other end of the one deterioration detection interconnect and the other end of the other deterioration detection interconnect deteriorates on the basis of the detected voltage.SELECTED DRAWING: Figure 1