TIME-STEPPING FE ANALYSIS OF ELECTRIC MOTOR-DRIVES WITH SEMICONDUCTORCONVERTERS

The time-stepping finite element method of analysis of motor drive tra nsients is presented. A system composed of an electrical machine, semi conductor inverter and control equipment is considered. The proposed m athematical model includes: the FE equations of the electromagnetic fi eld, the equations which define the connections of windings and invert er elements, the motion equation, and the relations which describe the control system. The approach is based on the simultaneous solution of these equations. Special attention is paid to the movement simulation m the FE method. Transients in the drive with permanent magnet synchr onous motor and voltage inverter are analyzed.