Solenoid valve driving circuit, solenoid valve, and solenoid valve driving method

摘要

A solenoid valve driving circuit for a solenoid valve includes a current detector for detecting a current that flows in a solenoid coil, a rate of change over time calculating unit for calculating a rate of change over time of the detected current, and a maintaining state transition determining unit for determining a timing at which transition from a first period to a second period occurs based on the calculated rate of change over time.