CONTROL DEVICE OF SYNCHRONOUS RELUCTANCE MOTOR

摘要

PROBLEM TO BE SOLVED: To provide a control device of a synchronous reluctance motor that accurately estimates an angle and efficiently controls drive even if the level and speed of a current flowing through a stator coil change, and accurately estimates the angle at the boundary region between low-speed and high-speed regions even if a low-speed region utilizes pulses for estimating the angle. SOLUTION: The control device consists of a magnetic flux arithmetic means for calculating magnetic flux based on a phase current and a phase voltage that is subjected to a low-pass filter, an αβ-axis magnetic flux angle creation means for creating an αβ-axis magnetic flux angle for indicating the angle of a magnetic flux for a rest frame based on the magnetic flux, a dq-axis magnetic flux phase creation means for creating a dq-axis magnetic flux phase that indicates the phase of the magnetic flux for the rotating coordinates and changes according to an operation state, an estimation angle creation means for creating an estimation angle based on the αβ-axis magnetic flux angle and the dq-axis magnetic flux phase, and a drive means for applying a voltage to the stator coil based on the estimated angle.