THREE-PHASE ASYNCHRONOUS MOTOR CONTROL DEVICE

摘要

FIELD: electricity.;SUBSTANCE: device intended for control of three-phase electric motor is equipped with voltage-to-frequency converter, five-digit binary divider-counters per 24 states, four biased multivibrators and nine multiplexors. PWM control signal generating by standard digital elements ensures receipt of phase voltage close to sinusoidal voltage at permanent voltage-to-frequency ratio. Conversion frequency is increased for improvement of voltage curve shape.;EFFECT: increased reliability, simplified design, reduced dimensions, weight and costs, reduced labour intensity at adjusting.;2 dwg