| 摘要 |
PROBLEM TO BE SOLVED: To control the drive of a self-holding type solenoid without changing the circuit configuration of a solenoid driving device even in a case where a plurality of solenoid driving devices is manufactured or a case where load or a self-holding type solenoid require alteration or replacement.SOLUTION: When the duty ratio of a pulse width modulation signal is gradually increased from a first duty ratio, the duty ratio of the pulse width modulation signal when the operation of a self-holding type solenoid 2 is switched from an attraction operation to a return operation is used as a first set value. When the duty ratio of the pulse width modulation signal is gradually decreased from a second duty ratio, the duty ratio of the pulse width modulation signal when the operation of the self-holding type solenoid 2 is switched from an attraction operation to a return operation is used as a second set value. Using a third set value between the first set value and second set value, the operation of the self-holding type solenoid 2 is switched to the return operation from the attraction operation. |
