Re: Opposed Twin Magneto Question

[Anonymous]

Off the top of my head:

Direct current induces a magnetic field in a coil,
but a CHANGE in magnetic field is needed to induce a current
(a magnet just sitting next to a coil doesn’t make current).

The magnet moving past the heels of the core induces a current in the primary
(with a three-heeled coil, the flow of magnetic flux is reversed as the magnet passes
the center heel, which is a LARGE change in the magnetic flux).

The current in the primary builds a secondary magnetic field in the iron core.
opening the points interrupts the current in the primary,
which causes the secondary field in the core to collapse
which induces a current in the secondary winding of the coil.

The condenser absorbs current that would have caused a spark to jump the open points.

The stored energy in the condenser then discharges into the primary windings,
inducing a magnetic field in the core, until the condenser empties, then the primary current collapses, the magnetic field in the core collapses, which induces a new current in the primary windings, which recharges the condenser, rinse, repeat (getting smaller each time). All of this may extend the spark.