Φ Abstract -The paper presents design and technological aspects of high speed electrical machines including the radial and axial mechanical stress due to centrifugal forces. It presents a reversed structure with outside rotor and inside stator, with high rotational speed, 20.000 rpm -24.000 rpm, with 1kW power, witch serves as centrifugal fan. This unconventional type of machine is now, still in the phase of specific tests.
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