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The paper is concerned with planar linear permanent magnet motors and considers their operation at standstill. A method of finite element analysis is used in which the use of several space phase shifted force profiles accounts for the machine skew. The origin of the cogging forces, namely tooth and k i t e stator length effects, are explained. Results are given from a large experimental rig. It is shown that both cogging and electromagnetic forces compare well with the finite element analysis.The paper concludes with a design survey using simple magnetic circuit theory considering the use of both NdFeB and Ferrite magnets. Points on the graphs are validated by the FE analysis.

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