In this paper a geometry investigation of low rotational speed synchronous machines using finite element method is presented. The abovementioned investigation is accomplished using a two step design procedure for salient poles synchronous machines, while a respective example which will be shown synoptically is an under scale design of a low rotational salient pole synchronous motor connected to a ships propeller axis directly.Keywords: Geometry investigation, ships electric propulsion, finite element method, synchronous motor.

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This paper presents the design of geometrically similar switched reluctance machines based on similarity theory and scale factors techniques. The fundamental theory for the development of the proposed methodology is described. The proposed methodology is used for the design of a particular 21.6 W three phase 6/4 pole switched reluctance motor, which can be used as a special electrical machine (pump’s driving motor) in an artificial heart. In addition, a sensitivity analysis using FEM was performed in order to confirm the accuracy of the proposed method.