Controller for permanent magnet synchronous motor, microcomputer, electric motor system, and method for operating permanent magnet synchronous motor

摘要

PROBLEM TO BE SOLVED: To provide a controller for a permanent magnet synchronous motor capable of estimating a magnetic pole position without error. SOLUTION: A low speed side error calculation unit 12 that calculates a low speed side position error based on a current change amount on dq axes, a high speed side position error based on an induced voltage or a rotor magnetic flux obtained based on a voltage equation of a motor. The high-speed side error calculating section 13 for outputting and the adding section 14 for weighting and adding the position errors on the low-speed side and the high-speed side at a predetermined rate are respectively provided, and the magnetic pole position estimating section 15 calculates the rotor speed based on the addition result of the adding section. presume. [Selection diagram] Figure 1