One of the major potential challenges for simulating motor designs is the impact of stator lamination materials on motor performance. There are a number of variables in selecting magnetic materials for use in a brushless PM motor design. A first quadrant magnetizing curve and a core loss curve are needed from the steel foundry. The second curve involves core loss versus iron member weight at different excitation frequencies. Both curves must be loaded individually into the SPEED based material files. Stator and Rotor lamination thicknesses, unit flux density, and specific magnetic material also impacts motor saturation and core losses just beyond the knee of the 1st quadrant B/H curve. A new Motor-CAD BPM-EMag module simulation program will be used to illustrate the performance impact of these various materials on overall motor performance.
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