Chris Gerada

TL;DR: Key aspects which are investigated in this paper are the effect of increased DC bus voltage on the management of regenerated energy and an assessment of the feasibility of returning energy to the engine inertia.

TL;DR: A tuning method able to guarantee a set performance to avoid unstable operation is proposed and the effects of model uncertainties on the current loop system stability and robustness are analyzed and reported.

TL;DR: In this paper, a phase current reconstruction method is introduced to sample current in two zero voltage vectors, and a dc drift error mitigation method is proposed to eliminate the dc drift errors in the Hall current sensor.

TL;DR: A robust optimal position controller is synthesized that guarantees a good system robustness and is integrated in the control scheme in order to suppress the position oscillations due to different periodic force disturbances and enhance the levitation performance.

TL;DR: In this paper, the authors proposed and investigated possible methods for extending and improving the torque density capabilities of high performance, electrical machines, by combining performance enhancing strategies such as the use of an outer rotor, use of cobalt iron laminations and the adoption of high-performance winding arrangements into a structured methodology.