Speed sensorless motor control system and wind power generation system based on the current vector

摘要

The present invention relates to a speed sensorless motor control system and a wind power generation system based on a current vector. The present invention, as a speed sensorless motor driving system, measures at least two phase currents of a current magnitude command value generator that generates a magnitude command value of a stator current to be applied to the motor, and a 3-phase current applied to a 3-phase AC motor A current measuring unit that calculates the magnitude and phase of a stator current vector based on the measured phase current, an angular velocity that calculates the estimated angular velocity of the motor rotor based on information based on the phase of the stator current vector Estimating unit, a current controller for controlling the stator current of the motor based on the stator current magnitude command value and the stator current vector magnitude, a voltage command value to be applied to the motor based on the current controller output and the phase of the stator current vector It provides a speed sensorless motor drive system, characterized in that it comprises a voltage command calculation unit to generate. According to the present invention, there is an effect of being able to estimate the rotor speed of the motor simply and accurately by measuring the current applied to the motor without a sensor for the speed or position of the motor rotor.