Control of Switched Reluctance Starter - Generators

E. Kennedy, M. Condon, and J. Dowling (Ireland)


Switched reluctance machine, control, modeling, simulation


The paper proposes a strategy for controlling an integrated starter-generator system. The starter-generator system is based on the Switched Reluctance Machine (SRM) and is intended for automotive applications. The main focus of the paper is the development of a controller for the SRM when it is acting as a generator. The adaptive control strategy proposed by Russa et al [1] is chosen for the starting phase when the SRM is acting as a motor. Once the engine reaches idle speed, the SRM becomes a generator and a control strategy based on that proposed by Kjaer et al in [2] is suggested. Kjaer et al [2] derive a mathematical relationship between the firing angles and the average generated current for a linear model of a SRM where saturation and fringing effects are neglected. The present paper examines the relationship between the turn-on angle and the average generated current for a more general SRM model that includes non linearities and saturation effects. The resultant relationship is subsequently used to develop a closed-loop controller for the Switched Reluctance Generator (SRG).

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