Abstract
A design method of the cylindrical linear induction motor (abbr. C-LIM) is mentioned in this paper. An analysis method of electromagnetic characteristics of the C-LIM is developed by the onedimensional linear current model. In the case of 2 phase 2 coils C-LIM, it is difficult to use the railway LIM analysis method because its ratio of slot width/core width is different from the C-LIM's. And performing experiments about actual motors, frequency-force characteristics are obtained respect to some values of secondary surface resistivity. From these studies following results are obtained:(1) From the analysis model, flux distribution and sliding force expressions are derived by dividing input current distributions into 4 regions. (2) The equivalent magnetic gap for a slider-stator gap is estimated using the finite element method and equivalent electric circuit. (3) Difference between calculation values and experimental values of frequency-force characteristics is about 10%. (4) It is shown that the maximum starting force is obtained from the suitable polepitch, secondary surface resistivity, frequency, and equivalent magnetic gap, and C-LIM can be designed as a servomotor by taking those suitable motor parameters for the maximum starting force.
