Data from the AMANDA-B10 detector taken during the austral winter of 1997 have been searched for a diffuse flux of high energy extraterrestrial muon neutrinos. This search yielded no excess events above those expected from background atmospheric neutrinos, leading to upper limits on the extraterrestrial neutrino flux measured at the earth. For an assumed E-2 spectrum, a 90% classical confidence...

Performance evaluation of an axial flux surface mounted permanent magnet (PM) field controlled TORUS type (FCT) disc machine is presented in this paper. This new machine is an axial flux configuration with true field weakening capability since the flux is controlled by the DC field winding rather than opposing the magnets. Structure and operating principles are summarized in the first section. ...

After a dynamically active emergence phase, magnetic flux at the solar surface soon ceases to show strong signs of the subsurface dynamics of its parent magnetic structure. This indicates that some kind of disconnection of the emerged flux from its roots in the deep convection zone should take place. We propose a mechanism for the dynamical disconnection of the surface flux based upon the buoya...

Permanent magnet motors have been considered for a variety of applications due to their features such as high power density and high efficiency. One of the issues that should be investigated in the design of these motors is the demagnetization problem. Usually, the demagnetization analysis is carried out in a steady state, while demagnetization effect in dynamic condition is more considerable d...

Surface permanent magnet vernier motors (SPMVMs) possess the potential for direct-drive applications due to feature of high torque density. This paper presents a deep investigation into armature reaction modeling and semi-analytical optimization framework considering constant power speed range (CPSR) in flux weakening region SPMVM. The new model can identify air gap density each harmonic compon...

Indirect field-oriented control (IFOC) of a linear induction motor (LIM) drive is an important challenge because the end effect and nonlinear behavior LIM drive. It becomes more complex in high-speed applications flux-weakening (FW) regions when current voltage constraints must be satisfied. Moreover, considering primary resistance constraint inequality makes calculations even complicated. This...

In electrolytic capacitorless permanent magnet synchronous motor (PMSM) drives, the DC-link voltage will fluctuate in a wide range due to use of slim film capacitor. When flux-weakening current is lower than $-\psi_{\mathrm{f}}/L_{\mathrm{d}}$ during high speed operation, control loop transform ...