Features of Operation of Bifilar Cooper and Tesla Coils in Pulse Regime

Abstract

The characteristic features of operation in a pulsed regime of bifilar Cooper and Tesla coils during magnetic pulse processing and heating of the environment are considered using the dependence of the maximum amplitude at the leading edge of the magnetic pulse on its time duration τ . The spatial distribution of the magnetic induction lines B inside and around the Cooper coil is given, where, unlike the Tesla coil, the maximum values of B arise in the extreme planes of the coil, and its central plane is zero. The defining advantages of new methods of magnetic pulse processing and heating of the environment are considered: the dependence at τ → 0; the exchange of energy between the magnetic pulse and the environment; periodic sequence of series of unipolar magnetic pulses at various processing modes. It is shown that 1) for electric fields E out = 10 10 – 10 12 V/m, arising at the leading edge of a magnetic pulse with duration 10 -5 – 10 -7 s, in the deformation fractal space the electrodynamics of these fields is nonlinear; 2) inside the Tesla coil, in the package of conducting tapes and tubes, the pumping energy from the pulsed field E out is mainly dissipated in the skin layer in the form of refractory coatings and heats the environment at all stages of plastic deformation of workpieces and heating elements up to the collapse of unstable microcracks. The coefficient of conversion of the pump energy in the pulsed regime with respect to the constant current regime is found.