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Linear permanent magnet vernier machine (LPMVM) has the feature of high thrust density at low speed, which make it a suitable solution for direct-drive applications [1], such as pumps and linear servo system.
To establish a large-scale magnetic field analysis, the magnetic field analysis with the voxel modeling is investigated. To reduce the number of elements, the nonconforming technique is introduced. The accuracy of flux densities, eddy current densities, and forces obtained from the nonconforming voxel modeling is verified by comparing with those obtained from the ordinary voxel modeling in a simple...
Two different carbon nanotubes (CNTs) were synthesized by thermal chemical vapor deposition (CVD) system through two different apparatuses. Uniform deposition of CNTs on glass substrate was observed through optimizing parameters in the process of electrophoresis by scanning electron microscopy (SEM). The field emission properties were tested in the diode-type construction with the cathode-anode gap...
4H-SiC power BJTs are investigated by experimental measurements and numerical simulations. A number of phenomena that are different from Si BJT are investigated including the Vce offset voltage and collector conductivity modulation. The current gain as a function of collector current density has also been studied. Simulation shows the emitter and base junction interface states plays a key role in...
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