영구 자석 동기 전동기의 제어 장치, 마이크로 컴퓨터, 전동기 시스템 및 영구 자석 동기 전동기의 운전 방법

摘要

The control device of the embodiment rotates a current change amount calculating unit that calculates a change amount of electric current applied to the stator of the electric motor, a magnetic pole position estimation unit that estimates a magnetic pole position of the rotor from the estimated rotational speed, and an estimated magnetic pole position. A position correcting unit correcting based on a parameter for determining the output torque of the former, a coordinate converting unit converting the current into a current on the dq axis based on the estimated magnetic pole position, d, q axis current command values and d, q axis A current control unit for current control to generate d and q-axis voltage command values based on each difference of current, and a modulation control unit for generating PWM signal command values for a plurality of phases based on the d and q-axis voltage command values and the estimated stimulus positions. , Low-speed side error calculation unit that calculates the position error on the low-speed side based on the amount of current change on the dq axis obtained by coordinate transformation using the corrected stimulus position, high-speed based on the induced voltage or rotor flux obtained based on the voltage equation of the motor A high-speed error calculation unit outputting the positional error of the side, and an adder for weighting and adding the positional errors of the low-speed side and the high-speed side at a predetermined ratio, and the magnetic pole position estimating unit based on the addition result of the adder, the rotor speed To estimate.