Analysis of a large power PMSM using different control methods

This paper analyzes the characteristics of a large power surface magnet PMSM with sinusoidal windings used in a marine propulsion system using phasor diagrams. Also, these characteristics are simulated using MATLAB. The analysis and simulation are done for three different types of current control schemes, that is, the i_sd = 0 control method, unity power factor control method, and constant air-gap flux linkage control method. Based on the performance of the PMSM under these different control methods, a conclusion is drawn that the i_sd = 0 control method is superior to the other two control methods in marine propulsion systems when the armature reaction reactance is low.