| 摘要 |
<p>The present invention relates to a PWM current control method for driving a solenoid valve, wherein the PWM current control method comprises: a step of detecting a target current for driving the solenoid valve using a control part; a step of comparing the target current with a predetermined reference current; and a step of generating a current by a duty ratio in which a dither signal is added to a pulse width modulation (PWM) signal corresponding to the target current when the target current is below the reference current. According to the present invention, the opening/closing responsiveness of a solenoid valve can be improved compared with an existing single frequency PWM control, and the response linearity of the solenoid valve can especially be improved when a current is low. [Reference numerals] (AA) Start; (BB) No; (CC) Yes; (DD) End; (S10) Detect a target current; (S20) Target current <= reference current?; (S30) Generate a current by a duty ratio in which a dither signal is added to a PWM signal corresponding to the target current; (S32) Generate a current by a duty ratio for the PWM signal corresponding to the target current</p> |
