Abstract
This paper presents the static characteristics of the linear BLDC motor. An equivalent magnetic circuit model is derived for the prototype motor. The air-gap flux density is calculated using the equivalent magnetic circuit and compared with results from finite element analysis. The thrust force is measured for the prototype motor and is also compared with those from derived circuit model and FEA. These values agree well to show the validity of the equivalent circuit model. Using this equivalent circuit model, the thrust force density variation according to change of coil width to pole pitch can be expected at the design stage.
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