Multifunctional Converter Drive for Automotive Electric Power Steering Systems

摘要: In this thesis it is shown that in the case of an automotive electric power steering system, critical pulse loads can be decoupled from net with a storage element and multifunctional converter. A converter system proposed because uses motor drive as dc-dc hence no additional front-end required. The influence to torque losses induction PM synchronous machines were analyzed design guidelines developed. This was necessary fixed star-point connection superimposed dc phase currents system. It analytical models FEM simulations verified measurements on winding scheme has carefully selected avoid partial saturation, braking increased ripple. With presented improvements, consisting interleaved pulse-width modulation arrangements, high-frequency ripple significantly reduced. further benefit three-phase electrical operated only two active phases increase reliability.