A method to determine the poloidal mode number m in a spherical tokamak based on magnetic probe data was developed. Perturbed magnetic fields at Mirnov coils are calculated for distributed helical filamentary currents on rational surfaces assuming the maximum current amplitude, m and n (toroidal mode number), and the toroidal location of the filaments. These free parameters were determined from...

Faraday's work inspired the development of electrical motors and generators. Until Maxwell pointed out the significance of Ampere's Law, there was no rigorous design method for magnetic devices. His interpretation strongly influenced the creation, by others, of the 'magnetic circuit' approach, which became the seminal design technique. This, utilizing the concept of reluctance, led to the desig...

We present a statistical analysis of the occurrence bifurcations Region 2 (R2) Field-Aligned Current (FAC) region, observed by Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE). Previously, these have been shown to occur as polar cap contracts after substorm onset, beginning growth phase. During this phase both 1 (R1) R2 currents move equatorwards expands. Followin...

Abstract Unsteady aerodynamic force refers to the that magnitude and direction of load borne by aircraft will change with time during flight. Usually, simulation unsteady is completed wind tunnel test. This paper introduces a new method based on electromagnetic field Ampere force. Compared traditional test method, greatly reduce cost make it possible repeat multiple tests. In order verify wheth...

Abstract Partially superconducting direct-drive wind turbine generators with high-temperature excitation winding enable an increase of the rated unit power, higher efficiency, and a high, adjustable power factor. The high ampere-turns allow for iron topologies that differ from conventional permanent magnet-excited generators. This study compares four different $$7\,\mathrm{MW}$$ <mml:math xmlns...