Double-Sided Iron-Core PMLSM Mover Teeth Arrangement Design for Reduction of Detent Force and Speed Ripple

This paper analytically and experimentally shows effectiveness and simplicity of mover teeth arrangement design, which dramatically reduces detent force and consequently speed ripple at low speed. For this purpose, this paper describes two design steps that include the conventional magnetic circuit optimization by response surface methodology (RSM) and a slight modification of the optimized model based on the proposed mover teeth arrangement. Two prototypes were fabricated, tested, and compared from various perspectives. It was experimentally confirmed that the proposed design is very effective in reduction of detent force and speed ripple with the least sacrifice of performance.