| 摘要 |
PROBLEM TO BE SOLVED: To provide high control precision by an inexpensive means by detecting changes of a drive characteristic in a solenoid valve by a means using simple computation and carrying out compensation based on the detection. SOLUTION: A solenoid valve controller is provided with a current feedback control part 30 which detects a monitor current value when at least two different feedback drive control signals set in advance among signals outputted by a gate valve PWM drive circuit 29 are outputted, obtains a feedback operation characteristic which is an operation characteristic of the solenoid valve at the time based on a duty ratio of these feedback drive control signals and the monitor current value, and applies compensation when the drive control signal is outputted based on the feedback operation characteristic. |
