DIRECT FINITE-ELEMENT DESIGN OPTIMIZATION OF THE CAGELESS RELUCTANCE SYNCHRONOUS MACHINE

The finite element analysis method is used directly in optimisation al gorithms to optimise in multidimensions the design of the cageless rel uctance synchronous machine, Two optimisation methods are evaluated to minimise or maximise the function value. These are the direction set method of Powell and the quasi-Newton algorithm. Both methods proved t o be successful, with some advantages and disadvantages. Using these m ethods at a power level below 10 kW, results are given of structures o f the reluctance synchronous machine which have been optimised accordi ng specific criteria. Calculated and measured results show that the ma ximum torque optimum designed reluctance synchronous machine has the a dvantages of high power density and high efficiency.