The current development of electric drives not only focuses on reducing manufacturing and failure costs but also on increasing efficiency and power density. The latter is mainly achieved by the use of permanently excited machines since these machines operate without the electrical generation of the rotor magnetic field due to their design. This eliminates ohmic losses, which potentially means higher efficiency. The air gap field, which is built up by the rotor and stator, has a considerable influence on the quality of a permanently excited synchronous motor. However, the effects of the magnetic fields on the essential target values of a drive with regard to optimum power density, reduction of cogging torques, avoidance of vibrations, and reduction of noise emissions can only be considered to a limited extent in the manufacturing process.
Already existing measuring systems for the characterization of magnetic components allow the testing of the magnetic stray field within the scope of development processes. However, the use of these measuring devices requires special expertise in the field of electrical engineering and the evaluation of the measurement results calls for in-depth knowledge in the field of motor design. Moreover, the measurement and evaluation tools do not offer the possibility to import geometry descriptions and simulation data and to include them in the interpretation of the collected measurement data.
Within the project ExApeMo missing technical links between magnetic field simulation and magnetic field measurement of permanently excited motors will be developed and a software for the integration of measurement data and the identification of deviation causes will be conceptualized and prototypically realized.