Keppe Motor simular to Newman-Bedini combination

[hansvonlieven]

G'day all,

I am working on a diagrammatic representation of the motor that shows clearly how it works. I will upload it here when it's done.

Hans von Lieven

[hansvonlieven]

As promised, here it is:

The Keppe Motor


The motor is basically a permanent magnet inside a coil. When the coil is energised the magnet will align itself with the magnetic field inside the coil.

To get the contraption to rotate Keppe pulses the current going through the coil. He does this via a small commutator disk with a small magnet attached. As the magnet passes a reed switch the circuit is closed and the coil energised for a brief moment.

There is nothing new or original here. His theory is crap.

Hans von Lieven

[gmeast]

Hi all,

I thought I'd post some pics of my setup.  I got the motor running and completed the test fixture yesterday.

#12 shows the motor running under a load in its setup. You can tell it's running because the phenolic base is visible through the rotating paddle on the right side.
http://home.pacbell.net/gmeast/keppe/keppe12.jpg

#13 & #14 show the coil frame and reed switch support mounted for rotation so that a torque arm can be attached and used in conjunction with a gram scale to measure motor reaction torque.  This is just like in the video (very good video I must add).
http://home.pacbell.net/gmeast/keppe/keppe13.jpg
http://home.pacbell.net/gmeast/keppe/keppe14.jpg

#15 shows a scope trace of the motor running.  As can be seen, the battery is 7 - 8 VDC.It's running at around 480 RPM. 
http://home.pacbell.net/gmeast/keppe/keppe15.jpg
It was consuming around 0.035 to 0.045 A (35-45 mA).  The damping oscillation is right around 335-340 Hz as seen on the scope capture found at lower right 

I intend to determine my input power by measuring the AC current from an isolation transformer (115VAC-12VAC) that will, in turn, get rectified and charge a large 16 VDC electrolytic cap as the Keppe motor's supply.

I will determine output power by using an adjustable eddy current (prony) brake (as a replacement for the paddle shown) to load the motor, the aforementioned torque arm and a remote tach for RPM.

When I get the rest thrown together, I'll post some more pics and make a video.

Happy experimenting,

Greg

[gotoluc]

Thanks Greg for the new pictures and sharing your first known data.

Looking forward to your other tests.

Luc

[gmeast]

Hi everyone,

I have finished building my eddy current loading brake.  I also finished wiring a 115VAC-10VAC xformer, bridge rectifier and 65,000uF cap as my power supply to feed my Keppe motor.  Monitoring the VAC into the bridge and large cap provides an accurate reading of the input power to my Keppe motor.

Under load and with best timing there is nearly NO sparking or arcing at the reed switch ! !

The motor is running at 960 (or so) RPM.

I have adjusted the timing of my Keppe motor for best power under load.  I have not received my digital scale I will use to measure torque but I'll post what I have now.

Enjoy,

Greg

Here are the pictures:

This picture shows the eddy current brake used to load the Keppe motor.  As the magnet on the screw moves closer to the spinning aluminum disc, the motor gets loaded.
http://home.pacbell.net/gmeast/keppe/keppe18.jpg

This picture shows the timing adjustment used to produce best power under load.  Notice the spikes going MOSTLY negative
http://home.pacbell.net/gmeast/keppe/keppe16.jpg

This picture shows a large volume of negative going spikes at the beginning of the stator coil oscillation.
http://home.pacbell.net/gmeast/keppe/keppe17.jpg

The next picture shows the stable AC power at 12.46V-RMS feeding the bridge and cap.  It is nearly perfect sine wave ... suitable for computing input power.
http://home.pacbell.net/gmeast/keppe/keppe20.jpg

The next picture shows the transformer, bridge rectifier, cap and back of my Keppe motor.
http://home.pacbell.net/gmeast/keppe/keppe19.jpg

This last picture is the current my Keppe motor is drawing while running at 960 RPM under load and producing the above scope captures.
http://home.pacbell.net/gmeast/keppe/keppe21.jpg