METHOD OF ESTIMATING INITIAL MAGNETIC POLE POSITION OF PERMANENT MAGNET TYPE BRUSHLESS MOTOR, AND PERMANENT MAGNET TYPE BRUSHLESS MOTOR CONTROLLER

摘要

PPROBLEM TO BE SOLVED: To provide a device and a method which can shorten and fix the setting time until conforming an axis to a real magnetic axis d or an axis -d which has advanced 180 from the real magnetic axis, without recourse to the electric angle of the reference phase 0 to start the estimation of the initial magnetic pole, and can improve the accuracy in magnetic pole position estimation, by estimating a magnetic pole position estimation starting phase S in advance. PSOLUTION: It is so arranged as process the transaction in such a procedure as to observe and store the interference current generated in the direction of an axis when a -axis current command from a -axis current generating circuit 1 is given as a step-form AC current command, within a SB/SBSBs/SBmaking circuit 7, and to decide the magnetic pole position estimation starting phase SBS/SBin advance by the magnitude relation of the interference current stored this way. PCOPYRIGHT: (C)2006,JPO&NCIPI