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Frameless motor or alternator

A frameless motor or alternator is constituted of 2 parts : one stator and one rotor without frame nor bearings.In the case of a frameless permanent magnet AC motor, the stator is constituted of an assembly of laminations carrying a 3 phase winding inserted inside a housing. The rotor is constituted of a magnetic core carrying permanent magnets.For being operational, the 2 parts need to be integrated by the user inside a mechanics with bearing(s). The interest of frameless torque motors or alternators by comparison with complete housed motors with bearings, shaft, flanges, resides in the capability to achieve a compact mechatronic system in direct drive without gear without redundant parts or components and highest reliability, efficiency and precision. Frameless torque motors are particularly recommended for optimizing technically and economically the direct drive applications in machine-tools, printing, plastics, rubber, electronic components industries and wind turbine or water turbine in the case of permanent magnets alternators for energy generation. ALXION has a range of high performance STK frameless torque motors with highest torque density and diameter between 145 mm and 800 mm for and STK frameless alternators mainly used for wind or water turbines.

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