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The improved equivalent circuit models considering the end effects are put forward to predict the performance of annular linear induction electromagnetic pump (ALIP) based on the one-dimensional analytical model built in this paper. First, the one-dimensional physical model of ALIP is established, and the analytical expressions of electromagnetic fields are deduced and the impact of the end effects on it is analyzed. Then, two equivalent circuit models including the model only considering the end effects and the model fully taking the end effects and the difference of synchronous velocity among the end effect traveling waves and the fundamental wave into account are developed. Meanwhile, the key impedance parameters in the equivalent circuit models are obtained and the correction coefficients of the impedance generated by the end effects are abstracted. Furtherly, the performances of a small designed ALIP are calculated by the conventional and two improved equivalent circuit models respectively, the results obtained from them are compared with measured data to validate the rationality and feasibility of the models proposed.

The Improved Equivalent Circuit Models Considering End Effects of Annular Linear Induction Electromagnetic Pump for Space Nuclear Power Supply