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Motivation for research Magnetic bearings have been widely used in high-speed rotation system, machinery, aerospace, and high precision system because of the numerous advantages of non-contact rotating machines, such as a no wearing, low loss, long life span compared with conventional bearings, and absence of lubrication [1][2].
The axial flux permanent magnet (AFPM) machines are widely applied in various industrial settings in recent years, because of high energy density, high efficiency and compact construction as compared with other conventional radial flux permanent magnet (RFPM) machines.
This paper describes the use of an analytical approach using a 3D analytical method to calculate the eddy current loss of a permanent magnet linear synchronous generator (PMLSG) considering tapped holes in permanent magnet movers.
Preheating for nonferrous metals in industry is realized through induction furnaces with a large capacity at commercial frequency. The energy efficiency of this process is about 50%–60% due to enormous energy loss through the copper coils. An ac induction furnace applying 2G high-temperature superconducting (HTS) magnets has been suggested in order to achieve higher efficiency. The most important...
A spur gear is the most common type of gears. They are mounted on parallel shafts, as shown in Fig. 1(a). Mechanical spur gears, which play important roles in transmission systems, inherently suffer from the drawbacks of high transmission loss, bulky size, high noise, wear-and-tear [1,2]. Magnetic spur gears can readily replace mechanical spur gears. Magnetic spur gears have no cut teeth or cogs and...
Tubular permanent magnet machines (TPMMs) are increasingly being employed in industries ranging from transportation, manufacturing, and office automation to material processing, health care, and generation systems, because of their high force density, high bandwidth, virtually zero attraction force, and absence of end windings [1]. The advantages of such a machine are good linearity, no requirement...
We demonstrate a surface-enhanced Raman scattering substrate consisting of a closely spaced metal nanodome array fabricated on flexible plastic film. We used a low cost, large area replica molding process to produce a 2-dimensional periodic array of cylinders that is subsequently overcoated with SiO2 and silver thin films to form dome-shaped structures. Finite element modeling was used to investigate...
The capabilities and advantages of vacuum interrupters (VIs) have been widely recognized on switching and controlling the fault currents in medium voltage level, and there have been doing various research and developments for using VIs in transmission and distribution lines due to its environmental friendliness nowadays. An axial magnetic field (AMF) electrode has more advantages of the switching...
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