Novel Voltage Trajectory Control for Flux Weakening Operation of Surface Mounted PMSM Drives

Simulation and experimental results of hybrid electric machine with a novel flux control strategy

“…The output voltage of the power converter can be increased, but the limitation is the maximum supply voltage of the DC bus [15][16] and the permitted voltage of stator windings of the machine resulting from the technology of the winding insulation. The consequence is the limit of the maximum speed to base speed for no-load operation (I q = 0 A), it means: There exist numerous methods of field weakening operation mode control of PM machines.…”

“…One of them is based on mathematical model of the machine. The stator currents (both I d and I q ) are determined offline and then their values are saved in the control system (a "look-up table" method) [15].…”