Has anyone seen or heard or replicated the Stephen Kundel motor? it really seems like a working solution!! Hurrah! Check out all the videos including the replication project.

http://www.kundelmotor.com

Very interesting motor.  It demonstrates a working motor (very important, as most other motors claim to run but have never been seen running by a live person willing to give their testimony to the public), and a good way to extract motion from magnets (while using very little power).  The motor is not a self starter, but requires a spin from the hand to start.  The motor has good speed despite the moving part (moving parts can be justified in a motor as this motor demonstrates it's speed for certain applications).  It is somewhat difficult to build because the ring magnets have to be cut to operate correctly and it requires quite a few magnets for the basic model to run.  This model shows that timing to a magnetic motor is of great importance for performance.  The magnetic angle of thrust between magnets is not ideal on this device, and results in weak torque which is partially derived from the linear action magnetic arm that shifts the magnets position which requires power.  This model uses some attraction and repel from the magnets to aid in the creation of rotational torque in running the motor, without running into an opposing pole (preferred way to design a magnet motor).  More magnet rings can be added to increase strength of motor, but also adds bulk to the moving magnetic arm.  Overall, nicely done and well thought out.  A good study in magnet motor design and has many good attributes.  There are movies of replications by others at the Kundel web site.

very interesting design, however I don't know if it's anything to celebrate about just yet, the motors in the videos, even the replications, were not self-runners. It's a novel concept, however I don't know if it's an OU device, or just a unique PMM. It seems that the armatures don't move back and forth very far to get those fairly high rpms, so it could be possible to mechanically oscillate, or generate the power to oscillate the device. 30 volts at .4 amps (12W) on the australian replication, to run it, but what's the output?

I also noticed that it was fairly low torque (he slowed it almost to a stop with his fingers). So mechanical total power isn't all that astounding.

Quote from: gn0stik on June 01, 2006, 03:38:57 PM
very interesting design, however I don't know if it's anything to celebrate about just yet, the motors in the videos, even the replications, were not self-runners. It's a novel concept, however I don't know if it's an OU device, or just a unique PMM. It seems that the armatures don't move back and forth very far to get those fairly high rpms, so it could be possible to mechanically oscillate, or generate the power to oscillate the device. 30 volts at .4 amps (12W) on the australian replication, to run it, but what's the output?

I also noticed that it was fairly low torque (he slowed it almost to a stop with his fingers). So mechanical total power isn't all that astounding.

Any ideas as to how he could increase the torque on the motor without adding bulk to the linear magnet arm? 

My suggestion would be to add another whole motor running more magnets at a 90 degree rotation to the first motor, but still running on the same axle to add torque to the motor further around the rotation.  Hopefully it would add more torque than electrical power used so it could be recovered with a small generator???

Well, without adding a flywheel, there's not much you can do... Adjusting the timing would be critical to torque, but aside from that, the only thing that would improve it, would be ensuring you are using the same strength of magnets on both the rotors and stators, and using bigger mags. neo n45-50 would be as strong as you can get..  Also, he's got too much mass on there already. You'd get the same rotational speed out of one rotor/stator setup as you would out of 3, but it's not really hurting anything the way it is.. Just more work to build. More mags does not necessarily mean more power. Larger mags however does.

However first things first, he needs to wind some coils and attach some mags to that shaft and see what kind of power he gets out of it with a low effiency generator. Then he can scale up the calculations to a higher efficiency setup.

for e.g. "If I'm getting (eout) power with a generator that is (x%) efficient, my (eout) with a motor that is (y%) efficient would be z.."