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In the context of the development of a 500'000 rpm miniaturized permanent magnet motor, a 3D analytical model for the assessment of mechanical stresses is presented. The significant mechanical stresses and thermal constraints encountered at such speeds are limiting factors, especially for the permanent magnets. The model, taking into account the axial stress component and the temperature, can be used...
This paper focuses on the design and analysis of a high-speed axial flux permanent magnet (PM) machine for an aerospace flywheel energy storage system. The design target is to experimentally verify the sinusoidal back electromotive force (EMF) considering the mechanical stress limitation of the machine at a speed of 32 000 r/min. Two machine models based on ferrite and SmCo PMs have been proposed...
Rotor mechanical properties under high acceleration is affected synthetically by a number of factors, in order to improve the operating characteristics of the rotor, the rotor with holes will be taken as the example, then the finite element model of the rotor with parallelism error is established, and by changing the distance between the hole and the rotor rotation center (denoted e), the influence...
Generator retaining ring is one of the maximum stress parts. The safety performance of hydrogen-cooled generator retaining ring directly affects the operation of generators and the influencing factors were studied in this paper. The mechanics of cracks on the retaining ring was analyzed. Using ANSYS finite element analysis software, the stress on the retaining ring of running generator is analyzed,...
Complete contact is often used in assembling wheel hub and shaft which are used in closed impeller assembly of the large turbine compressor. The interference is usually fixed. Because the contact area between wheel and axle is too much, bending shaft is occurred sometimes in assembling and completion of assembling. In order to research the mechanism of bending shaft, based on the nonlinear contact...
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