Maximum Torque per Ampere Control of IPMSM Using Online Flux Linkage Plane Estimation Considering Cross Saturation

Interior permanent magnet synchronous motors (IPMSMs) are used for various applications and high efficiency control is required. Maximum torque per ampere (MTPA) a method to IPMSMs with efficiency. However, since the motor parameters vary magnetic saturation, MTPA cannot be easily realized. Here in, we propose fully online automatic method. To find point while driving motor, it necessary predict entire flux linkage surface. Therefore, surface approximated by plane from sensor information at specific current condition that considers effect of cross-saturation. achieved using estimated gradient ascent The simulation results reveal maximized in two search periods, which was completed 0.06 s. proposed effective wide range.