ELECTROMAGNETIC RELAY SWITCH DEPOSITION DETECTION DEVICE AND ELECTROMAGNETIC RELAY SWITCH DEPOSITION DETECTION METHOD

摘要

A deposition detection circuit (3) provided in a deposition detection device (1) includes a determination circuit (4) determines whether the movable contact (9) is deposited based on a step input signal and a transient response signal when a drive signal is in an off state. The transient response signal is generated so as to correspond to voltage less than or equal to operating voltage of the electromagnetic relay switch (5) according to an excitation coil (6) and a fixed resistor (R1).