Characteristics of a brushless doubly-fed machine in current-fed mode of operation

This paper discusses the development of a current-forced model for a brushless doubly-fed machine (BDFM). The current-forced model is analyzed both in dynamic as well as in steady-state operating conditions. The simulated characteristics of the BDFM under dynamic operating conditions are presented using the parameters of an existing 5-HP laboratory prototype machine. Comparisons are shown between the simulated steady state characteristics and laboratory experimental data. It is concluded that this current-forced model representation of the BDFM, while retaining all the information pertaining to machine dynamics in a reduced order model, simplifies the analysis aspects of machine characteristics, stability and control.<
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