The Rotary Transformer Project.

[TinMan]

I managed to get the second coil wound and gave the rotary transformer a spin up over the weekend.It seems we have hit a bit of an unexpected snag.If i load one coil ,the rotor spins up and current input decreases(as per video's)-If i disconnect the first coil and load the second coil,the rotor speeds up and input current decreases (same effect as first coil).But if i load both coils,the current input decreases further-but the rotor slows down???.So by loading each coil individually,we get the effect we want,but if we load the coils at the same time ! although the current drop's further !we loose torque and rotor speed.At a guess,i think the magnetic flux from the output coils is traveling around the core and interfering with the other coils opperation-but all thoughts on this are welcome.I think i may have to cut the core section out between both output coils-as per the lockridge device?.

[mbrownn]

All the coils will interact unless you separate the circuits, very complex interactions.

With the setup I believe the Lockridge to be we have two separate magnetic circuits. The motor field coils actually supply no torque, it is the generator coils that are causing the motoring action. This way we have little or no BEMF in the motor coils and get a huge current draw so we have to drop the input voltage. All the "BEMF"is actually generated voltage in the generator coils.

The transformer action partially assists and partially opposes the generated voltage, the trick is to make it all assist the generated voltage.

Here is a drawing I modified to show what is happening.

A, B and the armature are all powered but in attraction. X X is how the case is split and C,D are the generator/transformer output coils. Without this 90 degree configuration there would be no motoring action.

Our output has been low on current but high on voltage but I believe this is because of the opposing action of the transformer for half the wave, otherwise out current could be considerable too.

Much of the voltage gain is given by the complex interaction in the armature and the fact that this voltage has now where to go until we fit recovery brushes.