Abstract: Electric motors and methods of controlling electric motors are described herein. The electric motors include a mobile component having at least one permanent magnet coupled thereto and a stator spaced apart from the mobile component. The stator includes at least one stator pole having a ferromagnetic core and a coil wrapped around the ferromagnetic core. The ferromagnetic core is naturally attracted to the at least one permanent magnet. The motors also include a magnetic position control system configured to monitor a position of the at least one permanent magnet relative to the stator and controllably deliver an electric pulse to the coil of each stator pole to generate a repulsive magnetic flux on the ferromagnetic core to cancel an attraction force between the ferromagnetic core and the at least one permanent magnet to control movement of the mobile component.

Abstract: A rotor for a turbomachine. The rotor comprises a hub including a peripheral surface, a first side surface, and a second side surface. The hub defines a plurality of cavities, each one of the cavities extending inwardly from the peripheral surface. The hub also defines a plurality of openings, each one of the openings extending from a corresponding one of the cavities to at least one of the first side surface and the second side surface. The rotor further comprises a blade coupled to the hub. The blade includes an end portion fitting in a particular one of the cavities and screwably secured to the hub. A particular one of the openings extending from the particular one of the cavities is adapted to receive a constraint element engaging the end portion.

Abstract: A rotor for a turbomachine. The rotor comprises a hub including a peripheral surface, a first side surface, and a second side surface. The hub defines a plurality of cavities, each one of the cavities extending inwardly from the peripheral surface. The hub also defines a plurality of openings, each one of the openings extending from a corresponding one of the cavities to at least one of the first side surface and the second side surface. The rotor further comprises a blade coupled to the hub. The blade includes an end portion fitting in a particular one of the cavities and screwably secured to the hub. A particular one of the openings extending from the particular one of the cavities is adapted to receive a constraint element engaging the end portion.