A method to compensate for a difference between a frequency between a reference frequency proportional to engine speed and the actual speed of the engine is dictated.In a motor drive assincrono tritasico of bow open which responds to a frequency reference and compensating speed to drive the motor assincrono of bow open respondsA reference frequency proportional to a speed of the motor driven

摘要

During motor jerk-out, the real component of a stator current ReI is measured as an approximation to torque current I.sub.T, and a reference acceleration A.sub.ref is obtained as an approximation to the motor acceleration, for providing, by means of linear regression, the Y intercept of a line defining the relationship between ReI and A.sub.ref, which intercept defines ReI at a constant high speed (ReI.sub.CONSTANT HIGH SPEED) for linearly relating ReI.sub.CONSTANT HIGH SPEED to a compensation frequency f.sub. comp, which is provided to a summer for summing f.sub.comp with a reference frequency f.sub.ref used for dictating motor speed. The stator current I and A.sub. ref are sampled during jerk-out when the motor is at high speed because there the real component of the stator current ReI is approximately equal to I.sub. T.