Optimal sizing method based on working cycle for High-Speed PMSM and a flywheel accumulator

摘要

The presented paper deals with the design optimization of a direct drive permanent magnet synchronous machine for a flywheel accumulator. Such a system working with variable speed and torque requires the development of a specific sizing method which integrates a set of distributed constraints over the operating cycle: a dynamic thermal behavior with a temperature limitation, the magnetic saturation, electrical and mechanical constraints. This article proposes a sizing method with the aim of minimizing both the volume (or mass) and the losses over a working cycle made of several thousand points that integrates all of these constraints while keeping a reduced calculation time. The study, suitable for any application, will be applied here to the sizing of a long term flywheel energy storage system in a maritime shuttle. Magnetic and thermal results will be validated by a finite element analysis (FEA).