Calculation and Analysis of Excitation Current for Brushless AC Exciter Based on Maxwell
Abstract
In view of the complexity of the core structure of the brushless AC exciter and the influence of saturation characteristics of the ferromagnetic material, the finite element software Maxwell was used to create a two-dimensional model of the brushless AC exciter for no-load characteristics and Rated excitation current for research and analysis. Taking a 28KW brushless AC exciter as an example, the simulation analysis of the air gap magnetic field of the motor and the calculation of the no-load characteristics, the calculated fundamental wave potential is consistent with the measured results, and provides a theoretical basis for the design of the electromagnetic field of this type of motor. Based on this, through field-circuit coupling method, the external circuit is used to simulate the rated load condition, and the excitation current under rated condition is calculated. This method has practicality and can provide reference for the calculation of the general AC exciter excitation current.
Keywords
Brushless AC exciter, Finite element method, No-load characteristics, Excitation current
DOI
10.12783/dtetr/ecar2018/26402
10.12783/dtetr/ecar2018/26402
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