Self-Oscillating Electric Generator

Dietmar Wehr has an idea for an electricity generator which is a self-oscillating device with no moving parts, which generates electricity through induction. The device consists of two Y-shaped pieces of soft iron, three iron pillars and a permanent magnet as shown here:

The pillars and the permanent magnet separate the two Y-pieces, forming a simple, robust shape. The width of the three arms of the Y-pieces is important as the operation of the device depends on these dimensions. The iron pillars marked “A” and “B” have output coils wound on them. The iron pillar marked “C” has an input coil wound on it as shown here:

When the coil “C” is pulsed, the magnetic field generated by that pulse either strengthens the existing magnetic field caused by the permanent magnet or opposes it. Either way, the pulse causes a change in the magnetic field in the Y-pieces. The effect of that change moves away from the permanent magnet and reaches the branching point of the Y-pieces. Because the “B” arm provides a better magnetic path, the magnetic flow passes along it as shown by the red arrows here:

This change in magnetic flux, generates output power in coil “B”, powering then load attached to that winding. When the drive pulse is cut off, coil “B” develops a back-EMF current flowing in the opposite direction. That change in current generates a magnetic pulse indicated by the blue arrow. This magnetic pulse travels back along the arm of the Y-piece until it reaches the junction. At this point it has two possible paths, either back towards the permanent magnet, or left towards coil “A”. As the path to coil “A” is much broader than the path back to the magnet, the flux flows through coil “A”, generating output power in the load connected to coil “A”.

This results in situation where one input pulse generates two separate output pulses. It should be possible to make the drive circuitry the load of, say, coil “B” and have the device self-powered as well as powering load “A”, as shown here:

Using diodes, it should be possible to combine the outputs from the two output coils if that is preferred. It is not necessary to make the device self-powered, especially in the prototype testing stages. If it is self-powered, then it can be started by waving a permanent magnet across the coil “C” to generate the starting pulse.

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  1. November 10th, 2012
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