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The determination of electromagnetic forces and parameters of permanent magnetic linear synchronous machines (PMLSM's), based on an evaluation of electromagnetic fields, as reported earlier, is considered. Analytical techniques applied to permanent magnet rotary synchronous machines are modified and adapted to PMLSM's. Fields were determined analytically in a single-sided PMLSM and computed results by the finite-element method were compared with those obtained experimentally in an earlier paper. A good correlation between the results were obtained by three procedures-analytical, finite-element computational method, and experimental. From these field evaluations the PMLSM parameters and performance are obtained.