Amber House
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Amber House does 3 things all in the field of electromagnetics:
1. We design and build science exhibits in the electromagnetic domain.
2. We carry out measurements of electromagnetics radiation and magnetic fields for both mobile base stations and overhead power lines.
3. We offer consultations in applied electromagnetics, particularly high power/high frequency industrial applications. If you enjoy sparks, magnets and believe in the witchcraft of science, this is your Hogwarts.
30/04/2015
We have a new device under development which will require switching immense current levels (>700amps) at relatively high frequencies. We have two DC busbar topologies we're working on at the moment, one of which is shown here. The main endeavour in such designs is to minimise inductance as much possible. The busbar's geometry is central to this end, and a basic rule of thumb is that the shorter, the better. Even the slightest inductance can create voltage overshoots that could ultimately destroy the switching element. The setting shown will be subjected to a dc voltage of 640 Volts.
The ignition coil driver we've built will be connected to a V shape electrode setting (Jacob's Ladder). The clip shows a previous test we did where electrodes had this V-geometry. Arcing initially happens along the shortest possible path (lowest point), then due to buoyancy, plasma floats to the top until it reaches a point where the electrode separation is too wide for arcing to be maintained.
It is worthwhile remembering that the term 'Electric Arc' was coined because plasma literally assumes an arc-shape when ignited between two electrodes; again this being due to buoyancy effects
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