ANALYSIS AND SIMULATION OF 5-PHASE SYNCHRONOUS RELUCTANCE MACHINES INCLUDING 3RD-HARMONIC OF AIRGAP MMF

In this paper, winding function method in conjunction with the coupled magnetic circuit approach are used to develop the dynamic equations o f the five-phase synchronous reluctance machine in the natural frame o f reference (a-b-c-d-e). The effect of third harmonic of airgap MMF is included in this development, A five-phase transformation from the (a -b-c-d-e) system to a (d(1)-q(1)-d(3)-q(3)-n) system is introduced, Th is transformation removes the angular dependency of the inductances, U sing this transformation, equations for a five-phase synchronous reluc tance machine including the third harmonic of the airgap MMF were obta ined, The resulting equations are compared with the equations in the n atural (a-b-c-d-e) system. Simulation traces are used to confirm the v alidity of the model, Finally, the developed equations are compared to the experimental results and the similarities and discrepancies ident ified.