APPARATUS FOR CONTROLLING REVOLUTION SPEED OF SYNCHRONOUS RELUCTANCE MOTOR

摘要

PURPOSE: An apparatus for controlling a revolution speed of a synchronous reluctance motor is provided to improve accuracy of a speed control operation according to a variation of load by controlling a low speed region and a high speed region, respectively. CONSTITUTION: A synchronous/static coordinates conversion portion(48) converts a reference magnetic flux voltage and a torque voltage to fixed coordinates. A static/synchronous coordinates conversion portion converts current of fixed coordinates to current of rotating coordinates by converting three-phase current of a synchronous reluctance motor(51) to two-phase current. A magnetic flux observation portion(53) receives an output of the synchronous/static coordinates conversion portion(48) and the current of the fixed coordinates in order to observe and estimate magnetic flux. A position estimation portion(55) receives the magnetic flux and outputs a magnetic flux angle of a rotator. A low speed region and transient state stabilization portion(54) performs a speed control operation and stabilizes a transient state.