Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Jul 24, 2012
In this short clip I am testing this new setup according to Gap-Power_com experiments. The RPM here is 1250, the power is being supplied by 12V 7.5 AHr battery. The current draw is measured as a voltage drop on 0.1 Ohm shunt resistor and its value is 370 mA maximum. There are 6 N52 neodymium magnets on the rotor, the driving coils are bilfilar in series, 2 in series, 4 Ohms total resistance and about 15 mH inductance together. A Hall sensor turns on a MOSFET transistor on an approaching magnet to neutralize repelling force from the stack of magnets behind the driving coils that push the rotor at Top Dead Center when the power is off. In that moment the coil becomes a generator coil as the core (magnetite powder + iron powder + resin) switches polarity and returns much of the energy back to the battery. This can be seen on the scope trace as the lover curve bump, below the marker line. It seems to be a very efficient motor, the cores do not heat up, more testing to come...