Torque characteristics of TSCAOI configured induction generators

Abstract

Three-phase cage induction machines, configured in two series-connected and one isolated (TSCAOI) configuration, have earlier been proposed for variable speed single-phase electricity generation. Although steady-state characteristics of TSCAOI generators have previously been investigated, both the nature of torque due to unbalanced operation and its impact on overall performance are yet to be analyzed. This paper therefore carries out a detailed investigation into the torque production of the generator, analyzing both the average and fluctuating components of the torque under various operating conditions. Theoretical torque-speed characteristics of a 3 kW 4-pole TSCAOI configured generator are presented in comparison to simulations, discussing its salient features and limitations.