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Magnetic gear has eddy current loss due to permanent magnets (PMs) unlike the mechanical gear. The eddy current loss becomes a main cause of decrease of gear efficiency. Therefore, this paper presented the eddy current loss reduction design of the PMs in the magnetic gear. The eddy current loss is calculated using a non-linear finite element method (FEM) based on 3-D numerical analysis and the effect...
In order to change noise problems of the existing gearbox loader, a new type of Permanent magnet loader is designed by using water cooling. The control system is realized mainly by using PLC (Programmable Logic Controller) and MCU (Micro Control Unit), and obtaining signals from multi-sensors. Meanwhile, fuzzy parameters self-tuning PID algorithm and automatic location algorithm have been studied,...
Floor hinge is a kind of building construction materials. A floor hinge is used to absorb undesirable mechanical impact in the case of opening and closing the door. Consequently, the door can be operated smoothly. The problem of a conventional hydraulic floor hinge is that damping torque varies so much for seasons due to the large temperature dependency of the viscous coefficient of oil. Hence, the...
The proposed noncontact magnetic gearr baseds on permanent magnets has many performance characteristics which are effective for eliminating gear noise and vibration. Because a magnetic gear is an oil-free machine element, it is suitable for use in clean rooms and in vacuum. However, magnetic gears suffer from a tendency to slip under high-speed startup. In order to make practical use of magnetic gears...
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