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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.