Some design aspects of the multi flux barrier rotor reluctance synchronous machine

[摘要] ENGLISH ABSTRACT:This thesis deals with different design aspects of the multi-flux barrier rotor of the reluctance synchronousmachine (RSM). The effect of the different designs on the performance of the RSM isinvestigated by means of two-dimensional finite element analysis. The finite element analysis is alsodirectly used in the optimum design of the rotor of the RSM. The importance of the use of the finiteelement analysis in the design and performance calculations of the RSM is illustrated in this thesis.The design aspects of the RSM which are focussed on in this thesis are, amongst other things,the chording of the stator winding, the skewing of the rotor and the ratio of the number of rotor fluxbarriers to the number of stator slots of the RSM. The effects of these design aspects on the averagetorque and torque ripple of the RSM are investigated and general design directives are given. Theoccurrence of flux pulsations in the stator teeth and rotor iron segments of the RSM are also studiedto some extent.The finite element optimum design of a4-pole RSM-rotor with a high number of flux barriers isdescribed in the thesis. This optimum designed rotor is built and the RSM with this rotor is testedin the laboratory. Its calculated and measured performances are studied and compared with a conventional,low number rotor flux barrier RSM. It is found, amongst other things, that the RSM withthe high number of rotor flux barriers has a slightly higher average torque with a significantly lowertorque ripple.

[发布机构] Stellenbosch University