100+ krpm Open-End Winding Reluctance Motor Drive with a Floating Capacitor Bridge

This paper presents the development of a highspeed electric drive based on a three-phase synchronous reluctance motor with a bimetallic rotor manufactured via additive manufacturing. The motor features an open-end stator winding and is supplied by a dual SiC-based inverter system consisting of two three-phase, three-level T-type inverters incorporating a floating capacitor. The floating capacitor topology enables the main inverter to operate at unity power factor. A coordinated control strategy manages both converters to maximize active power output while maintaining voltage and current within their limits and ensuring DC-link voltage balancing in the three-level converter. The paper describes the drive architecture, control scheme, and technical solutions adopted to achieve high-speed operation.