There are a number variations on this theme. Some are all
electronic and have electronic all switching [power
transistors] driven by a variable electronic sine wave
generator.
In reality they are the following design as illustrated.
A twelve volt lead acid battery will usually deliver a voltage
of between 12 and 13.5 volts, therefore to charge this battery a
voltage greater than this would be needed.
To achieve this four batteries are used, in one half of the
switching cycle two batteries are connected in series to give 24
volts and fed to the other two connected in parallel as 12
volts. In the other half cycle the batteries previously charged
as twelve volts are now a parallel connection of twenty four
volts and are now charging the other two as twelve volts.
On the diagram the green circles represent switches that are
activated by motorised activator and are in either on or off
mode together. The blue circles represent the other set of
switches and are off when the green ones are on.
The arrows represent power diodes and that help direct the power
flow. The key to making this device work seems to be the
frequency of the switching operation.
This is achieved by a variable speed electrical motor driving a
set of insulated disks with metal contacts fixed to wheels The
wheels themselves making intermittent contact with outer part
of the switch [see diagram] when rotated.
A power rectifier and a full wave bridge convert the pulsating
current to a dc supply.
Apparently the right resonance switching triggers something in
the chemical and electrical characteristics to give better
charging than expected and resulting in claims of over unity
power from some constructers.
The Hendershot Electrical Generator.
During the 1920's an Inventor in the United States called Lester
Hendershot produced a device which claimed produced useful power
of a about 300 watts. The device proved however to be erratic
in operation. The inventor claimed he was tapping the space
energy field.
The Hendershot generator consists of a special arrangement of
two basket weave coils with each of them being of three coils
themselves.
Each basket weave coils were placed around a stainless steel
cylinder upon which before a full capacitor al foils had been
wrapped.
The unit also consisted of two transformers of 5:1 transformers,
magnetic clapper unit, from which the unit was triggered and
additional capacitors.
For those who are interested in the full construction details,
his son Mark Hendershot who is trying to continue the work, has
available a full set of construction plans of the generator and
details of his father's life work.
A copy can also be obtained from the Tesla bookshop
