Optimized power electronics interface for battery starting of PMAC machines in integrated starter-generator applications

This paper presents the design and optimization through control of the power electronics interface from battery to PMAC machine aimed for integrated starter/alternator applications. A survey and analysis of available topologies for the application are conducted and presented. A conventional boost type DC-DC converter is employed to minimize the active component count and simplify the control algorithm. Analysis of the practical limitations and the losses of boost type DC- DC converter and PWM inverter are presented, and based on those results the new DC-DC converter control scheme is derived to optimize the power electronics interface for the specific application. Simulation results are also provided. The major contribution of this paper is an analytical approach to design an optimization of simple power electronics interface, with minimum active component count, for integrated starter alternator applications.