Abstract This paper proposes a method of no-load test for the LIM based on equivalent secondary:back soft ferrite substitutes for back iron to eliminate secondary eddy current while the magnetizing inductance keeps constant.A two-dimensional model of electromagnetic field has been established so as to derive the impact of relative permeability on magnetizing inductance.Keeping the magnetizing inductance constant,the equivalent secondary is designed according to the equation between the relative permeability of the back plate and the magnetizing inductance.The proposed method has been validated via finite element calculation and experimentations.Moreover,the equation of magnetizing inductance has been simplified to some extend in mathematics which can fit the control strategy of the LIM.
Di Jun,Fan Yu,Liu Yajing. Electromagnetic Analysis and Parameter Estimation for the Linear Induction Motor Based on Equivalent Secondary[J]. Transactions of China Electrotechnical Society, 2017, 32(11): 145-154.
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2017, Vol. 32 
