TORQUE CONTROLLER FOR PERMANENT-MAGNET SYNCHRONOUS MOTOR

摘要

PPROBLEM TO BE SOLVED: To provide a torque controller for a permanent-magnet synchronous motor that can achieve highly precise torque control at quick response even near a point at which the output voltage value of an electric power converter 2 is limited (saturated) and that can be applied in common to both an inexpensive current detecting system and a system from which a position sensor is eliminated. PSOLUTION: When the output voltage value of the electric power converter reaches a prescribed voltage value, a torque command value SB0/SBSP*/SPis corrected (SP*/SP=SB0/SBSP*/SP+SP*/SP) by using the integral calculated value of a deviation between the prescribed voltage value VSB1/SBSP*/SPSBref/SBand the output voltage value VSB1/SBof the electric power converter. PCOPYRIGHT: (C)2010,JPO&INPIT