Since the screening current induced in rare earth-barium-copper-oxide (REBCO) magnet generates an irregular magnetic field, a few simulation methods have been proposed. For insert REBCO generating ultra-high new method has proposed with consideration of coil-deformation effect. In this paper, we develop...

This paper presents a new and precise mo del for different kinds of eccentric rotor of rotating machines based on polar signals concepts. Eccentricity faults in each static, dynamic and mixed cases cause that the non-uniform air-gap of machine be established. The applied model using polar signals for eccentric rotors have removed the usage approximations in two recent decays. Eccentricity coeff...

While larger transistors are used to deliver more power in RF transmitter power amplifiers, it has been observed that the performance per unit gate width decreases with increasing width. In this work, a major cause of this performance degradation in RF LDMOSFET power amplifiers is identified as the mutual inductance in the system, and a field solver and circuit simulator are used to quantify th...

This paper proposes a novel permanent magnet linear motor possessing two movers and one stator. The two movers are isolated and can interact with the stator poles to generate independent forces and motions. Compared with conventional multiple motor driving system, it helps to increase the system compactness, and thus improve the power density and working efficiency. The magnetic field distribut...

cell problem Ω̇ = ǫBΩ + ǫF (t) with an effective matrix B and an explicitly-known F (t). We provide necessary and sufficient condition for the accuracy of the approximation (over a O(ǫ) time-scale), and show how B can be computed (at a cost independent of ǫ). As a direct application, we investigate the possibility of using RLC circuits to harvest the energy contained in small scale oscillations ...

• A generalization of the self-mutual helicity decomposition to open magnetic fields. Derived expressions can be readily used analyse complex MHD simulations. The topological underpinning fields connected a planar boundary is naturally described by field line winding. This observation leads definition winding , which closely related more commonly calculated relative . Winding helicity, however,...

The inductance of degaussing windings is an important parameter for the dynamic current adjustment and overvoltage analysis ship systems. This depends on not only shape, location, turns windings, but also distribution surrounding magnetic medium its eddy effect, leading to difficulty determining self- mutual inductances. To solve this problem, AC calculation method considering effect was first ...