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Abstract. The mechanical design and construction of slot wedges which are typically used in large synchronous machines must be robust enough to resist all occurring electromagnetic and mechanical force magnitudes within various operational states. Therefore, the invoked mechanical stress distributions near the slot wedge and the slot bottom are investigated with the aid of numerical and analytical methods. All performed investigations are carried out for several material properties which are typically used for industry applications.

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Switched reluctance motors are promising candidates for a wide variety of drive applications. The theoretical description of such motors is often reduced to the rather simple, but clear concept of ΨI‐characteristics. In contrast to this, the machine itself is a real electrical machine and must therefore be analysed as is done with conventional machines although the experimental machine is constructed as simple as possible. The paper will first describe some well known basics connected to very short machines and flux. In the next step, the calculation of stray flux quantities aided by 3D‐FEM is discussed and finally a comparison of calculation and experimental measurements is given.