|Induction coils fascinated me, from the very beginning of my interest
in electricity. They're really ancient devices (like an "older brother" of
Tesla coils) , invented and developed around 1850 by famous people from J.Henry
to H.Ruhmkorff and others (see also
Lyonel Baum's site
). Very widespread contemporary application is in automotive ignition coils,
relevant to tesla coilers as power supplies for tiny TC's, but more so as
HV elements in the recent development of triggered spark gaps. The analysis
of induction coils reveals a close proximity to the one on Tesla coils. They're
NOT just simpler than Tesla coils, at least at the beginners level (speak:
lumped parameter models). The main differences are:
1.) Starting energy is stored as Li2/2, instead of CU
2/2 in TC's (at least in conventional "interrupter"-mode).
Relevant common properties of TC's and induction coils:
1.) Both should be treated as inductively coupled LCR circuits;
not exclusively as "AC transformers".
The really weak element of the old induction coils was the "interrupter", being it a Wagner-Hammer, a Mercury Turbine Interrupter or a Wehnelt Electrolytic Breaker. Modern power electronic devices offer an alternative: if designed and tested, based on a good simulation model of the induction coil itself, they will probably outperform the ancient interruptors, and, - may be -, get the induction coil again into consideration for certain applications, as was the case before, i.e. with the old X-ray machines.
|Process of Construction||34 Tests with
|Induction Coil Theory & Analysis||Pspice Simulation|