Recent Developments of High Speed Electrical Machine Drive Systems

This paper overviews the current developments of high speed electrical machine drive systems through an extensive survey of different high speed machines, inverter topologies and control strategies. Key issues and challenges of both brushless AC (BLAC) and brushless DC (BLDC) control strategies for high speed permanent magnet (PM) machines, including position detection, digital implementation, current harmonics suppression, and commutation error compensation are highlighted.