MODELING AND VECTOR CONTROL OF SYNCHRONOUS RELUCTANCE MOTORS INCLUDING STATOR IRON LOSS

The influence of the stator iron loss cannot be neglected since the hi gh-speed operation and precision torque control of ac motors are requi red. This paper presents the modeling and vector control of synchronou s reluctance motors including the stator iron loss. The stator iron lo ss is modeled by additional windings on d-q axes, and is introduced as an equivalent iron loss resistance in voltage equations under the ass umption that the losses in the stator core are produced in equivalent eddy current windings on d-q axes. The equivalent iron loss resistance is inserted in series with exciting inductance, and the d and q axes interfere with each other through the equivalent iron loss resistance. To achieve vector control, the d-q axis currents are decoupled by non linear control voltages. As a result, the instantaneous torque control scheme is equal to that of a dc machine and the torque control is sim plified.