| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid current control device that detects a fed current value of a solenoid with high precision with a simple circuit configuration. SOLUTION: The fed current value of the solenoid is input to a V/F converter through a sense resistance, and output pulses from the V/F converter are counted by a counter circuit to obtain a pulse counted value. The pulse counted value corresponds to an integrated value of a solenoid current, and feedback control over a duty ratio of a PWM signal is performed using the pulse counted value to improve precision of average current value detection of the solenoid under current control over the solenoid. Further, the current value is converted into the pulse counted value and controlled, so that the solenoid current control device with the simple circuit configuration is actualized. COPYRIGHT: (C)2011,JPO&INPIT
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