VIBRATING FEEDER CONTROL APPARATUS AND VIBRATING FEEDER

摘要

A vibrating feeder control apparatus used for driving a vibrating feeder main body (1) includes a base (11), a movable body (12) elastically supported by the base, an electromagnet (14) provided on the base, and a magnetic core (15) provided on the movable body to oppose the electromagnet. The PWM signal generation unit (33) generates a PWM signal based on a set drive frequency (f) and applies a pseudo AC voltage corresponding to the PWM signal to the electromagnet. The current detection unit (34) detects a current flowing in the electromagnet by a pseudo AC voltage. The current change rate generation unit (35, 36) generates a current change rates (R_θ1, R_θ2) at a predetermined reference phase angle (θ1, θ2) within one cycle of the pseudo AC voltage. The frequency correction unit (37) corrects the drive frequency based on a current change rate at a reference phase angle.