Current control device for solenoid, storage medium storing program for controlling current of solenoid, and method for controlling current of solenoid

摘要

A current control device sets a target current value of a solenoid, and sets a duty ratio of a PWM signal outputted to a drive circuit of a solenoid based on the target current value. The target current value is a value that periodically varies in a dither period longer than a PWM period of the PWM signal. A setting period of the target current value and a setting period of the duty ratio are shorter than the dither period. As compared with a configuration where the duty ratio is set in the dither period, a time period from a time a basic current value is changed to a time the duty ratio is renewed is shortened. A operation responsiveness of a movable core of the solenoid improves.

主权项

1. A current control device for controlling an exciting current of a solenoid, the current control device comprising:
a target setting section setting a target current value of the exciting current; a duty ratio setting section setting a duty ratio of a pulse width modulation (PWM) signal, which is provided to a drive circuit of the solenoid, based on the target current value; and a signal generating section generating the PWM signal, wherein the target current value is a value that periodically varies in a dither period longer than a PWM period, which is a pulse period of the PWM signal, the target setting section sets the target current value in every first setting period, the duty ratio setting section sets the duty ratio in every second setting period, and the first setting period and the second setting period are shorter than the dither period.