The 'Dolphin' thread was beginning to incorporate many divergent ideas and I thought this motor deserved a thread of its own.
The MMG is a concept resulting from Lidmotors excellent 'Frog Hair' motor video, which can be found here:
https://www.youtube.com/watch?v=B0Nu4dKhUHg MMG - Minnesota Mountain Goat, refers to the quip about the flatness of MN, when I moved to the USA from England.
The line being about tiny thin gauge wire "Thinner than a hair from a Minnesota Mountain Goat"...which of course don't exist.
Lidmotor's motor uses 2 coils of 2000ohms each and a simple switching transistor circuit, with an LED across the flyback from the pickup coil.
My idea, is to use DF coils (Dancing Flower solar dancers from Dollar Tree), to first of all emulate and then to carry the concept forward. Full idea, is to use principles of the Lasersaber EZ Spin and coil energy pickup, to see where we can go toward highly efficient running.
As such, the great news is, that the motor runs on 4x DF coils in series for the trigger coil and 4x DF coils as the pickup coils.
This first setup is very rough and scruffy, but works.
2x DF coil based motor coils - 1923 ohms and 2033ohms
Transistor - MPSA18
Resistor - none !
Power - 0.1F supercap charged up with a 3V coin cell, then the coin cell is removed once it starts up.
The motor ran for 25 minutes on its first test run.
From 1.683V to 1.523V during the run took ~5 minutes
The thing is, the LED is lit all the way through and offers capture potential through a diode.
Nothing at all is optimised yet, in fact the rotor started to wobble badly a few minutes into the run.
A very interesting phenomena, is that the motor needs a high spin velocity to start, but after which, it carries on even with much lower RPM's than it took to start it up !
Also, on connection of anything above 1V, the slightest of spin of the rotor will trigger the circuit into an 'on' condition, whereby the red LED lights continually. The rotor can then remain stationary or be removed and the LED stays lit.
Here is the video of the first run, apologies for the state of the build table:
[youtube]Ixitls9Px5M[/youtube]