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The detent force of permanent magnet (PM) linear synchronous machines is the main source of thrust ripple. Its calculation becomes significant, especially under different load conditions. By using frozen permeability (FP) method, it can be obtained based on either the integral of Maxwell stress tensor or the virtual work principle. However, the calculated result from the former has nonzero average...
By using the frozen permeability (FP) method, the on-load detent force can be obtained based on the Maxwell stress tensor, which has nonzero average thrust force, or the virtual work principle, which is complicated and impractical with general commercial finite element (FE) packages, such as Jmag and Ansys FE packages. Therefore, a hybrid FE-analytical method based on d-q-axis flux linkage model is...
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