Simplified Approach for Developing Efficiency Maps of High-Speed PMSM Machines for Use in EAT Systems Starting from Single-Point Data

Electrically Assisted Turbochargers (EATs) have shown the potential of solving turbo-lag issues and improving exhaust energy recovery in turbocharged engines. Ultra-High-Speed (UHS) Permanent Magnet Synchronous Machines (PMSMs) were found to be well suited for EAT use. However, data required for preliminary system modelling are hard to come by and literature typically presents electrical quantities and power losses of a single operating point. This paper presents an easy-to-use approach for developing in the Simulink ambient a simplified model capable of providing Motor-Generator Unit (MGU) efficiency maps starting from single-point data and to easily perform machine scaling taking account of rotordynamics constraints.