Dynamic analysis of the single-sided linear induction motor with discontinuous secondary

Linear induction motors(LIM) with discontinuous secondary are more suitable for the application with sharp bend stroke than traditional continuous constructions. But the construction of segmental secondary narrows the eddy current loop area and aggravates the end effect. All these will result in increment of the eddy current loop resistance, decrement of thrust force and ripples in the forces. In order to overcome the disadvantages, the model of the LIM with discontinuous secondary is established by using the field-circuit combined analysis method. Based on the verification of the accuracy of the model by the experiment results of a LIM prototype, the influences of the secondary dimensions on the dynamic characteristics of the LIM were analyzed. And according to the periodicity of the ripples generated by the segments, the design criteria for the secondary are proposed, which is proved to be effective to eliminate the force ripples by simulation results.