| 摘要 |
FIELD: electrical engineering; electric drives of low-noise mechanisms such as those of domestic appliances. ^ SUBSTANCE: proposed method includes deceleration of rate of current decrease in phase winding upon applying phase disconnection signal for time corresponding to two or thee characteristic oscillation periods; this deceleration of current decrease process is effected by stepless reduction of mean voltage from positive value prior to phase disconnection to full negative voltage of power supply. In addition oscillation amplitude is reduced by shaping parabolic curve of current and then linear one at initial stage of current decrease. ^ EFFECT: enhanced effectiveness of motor noise reduction. ^ 2 cl, 4 dwg |
