SENSORLESS CONTROL METHOD FOR IPMSM

摘要

PURPOSE: A sensorless control method of an IPMSM(Interior Permanent Magnet Synchronous Motor) is provided to control the speed of a rotor without using a position sensor by estimating the counter electro-motive force of the IPMSM. CONSTITUTION: Each phase current and each phase voltage of IPMSM are inputted(S1000). A rotation coordinate voltage equation on two phase rotation coordinates is drawn using each phase current and each phase voltage(S3000). The rotation coordinate voltage equation is converted into a stop coordinate voltage equation on two phase stop coordinates(S4000). A term with a position angle of the rotor is defined as the counter electro-motive force term(S5000). An estimation counter electro-motive force is drawn using the counter electro-motive force(S6000). The estimation position angle of the rotor is drawn(S7000).