Wide speed range V/f with stabilizing loops control of tooth-wound IPMSM drives

Novel or modified sensorless control methods, credited with fast dynamic response, better drive efficiency and short computation time are just a few of nowadays main concerns. Therefore, this paper aims to theoretically characterize and digitally investigate through comprehensive Matlab/Simulink simulations three different V/f control strategies, with correction loops. The proposed control methods are all characterized by the missing of the vector current control standard speed and current controllers and they all use the Maximum Torque per Ampere condition (MTPA); coordinate transformations are not necessary. The most important claims of these new control strategies are fast dynamic speed and torque response, low computation effort and the bypassing of initial rotor position problem. To prove the previous claims, a fractionary winding interior permanent magnet synchronous motor (IPMSM) 42Vdc prototype was made and its parameters were previously determined by standstill and load performance laboratory tests. Preliminary test results with proposed method three are available at this point.