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Magnet Motors

Category > OC MPMM

Harvey's variation of the OC MPMM Magnet Motor

On March 6, 2008, Harvey posted a video showing a modified MPMM motor that involves tying a stator magnet to a coil and circuit to coordinate its pumping action to keep the motor running at a constant speed, with no outside energy input from the operator other than 12VDC electrical power input.

The rotor rotation is the result of syncronizing the oscillating stator magnet with the rotor's position using a Hall Effect sensor, NE555 timer, TIP120 driver transistor and a solenoid. Power for the circut is provided from AC mains and stepped down to 12VDC using an AC to DC converter. Thus OC's concept of altering the stators position in time relative to the rotor is proven valid. Others have attempted this using mechanical resonance but apparently as of yet have not succeeded.

Image:Harveys MPMM variant 250.jpg Image:Harveys MPMM variant circuit 250.jpg



(3:04 minutes)

  • OC MPMM New Approach - Pulsed Stator Approach to OC Latching. Proof of Concept. Status = Proven. System runs on 4 Poles driven by single stator. Rotor contains 8 poles thus 4 are sheared during pulse action. (YouTube; March 06, 2008)

(9:58 minutes)

  • Manual Stator Rocking Analysis - Analysis of manual stator rocking. Stroboscopic closeups at the end. 1 Pull will go about 6 poles, actually 6 of each N & S. (March 15, 2008)

How it Works

On March 9, 2008, User:Harvey wrote:

When a South pole field is detected in proximity to the Hall Effect sensor the sensor triggers the NE555. The NE555 is configured as a monostable multivibrator and upon being triggered issues a pulse for a set duration to the base of the TIP120 which drives the solenoid. Currently we are using a 40ms pulse and are hopeful to reduce this width and still maintain necessary stator movement. When the stator is properly timed its position approximates the 'latch' required by OC's concept and allows a dual force to be present on the rotor, both repulsion on one side of the stator and attraction on the other. By relaxing this position at the end of the reciprocal cycle the associated fields shear and slip past each other thus repositioning again for another 'latch'. Unlike other pulse type motors this arrangement positions the small but powerful stator magnet and leverages its field interactions to produce movement in the rotor. Hopefully this will prove to be more efficient than directly driving the rotor magnets with a coil.

Forum Discussions


On March 6, 2008, Harvey wrote to the Steorn forum:

OC's concept is to 'latch' the stators at just the right time to provide 'combination' forces on the rotor resulting in postive torque. While communicating with Cloud Camper on his successful motor driven system I was outlining the optimum configuration to minimize input power and get the maximum torque when I realized that a single solenoid could achieve the same thing with a narrow pulse as opposed continuous power. This New Approach involves oscillating the stator(s) 180 degrees during the equatorial pass.

Most replicators readily realize the forces present between the stator and rotor and Al demonstrated this in his first video when rocking the two ancilliary stators. As mentioned above one of the replicators attempted to find the resonance between this interaction using a spring (and I believe this is possible as well). But as I outlined in previous posts, in order for this to produce OU the stator must be able to exert more force on the rotor than is required to hold it in position. This can be easily acheived with an overrunning clutch (other posters have voiced this as well) and a low energy drive mechanism that moves fast enough to produce shear during the negative torque region of rotor travel. By holding the locked postion throughout the entire traversal from equatorial pass to equatorial pass 43 degrees of negative torque is eliminated and shear occurs at the pass.

In the New Approach video we have demonstrated several key elements that seem to have eluded previous replicant/alternate videos.

  • Sustained rotor motion with stator as only driving force to the rotor.
  • Oscillatory stator action demonstrating both shear and latching.
  • Single sensor simple electronic interface.
  • Single action solenoid to perform dual role of shear and latch.

It is my hope that others understand the importance of OC's concept and apply that to new approaches of their own. Here are some examples that need to be tried and tested:

  • Overrunning clutch (copier machines use these on their rollers) with low current or mechanical actuator to place it into the equatorial region.
  • Variable Resonant LC Tank with coil used as brake for stator and calibrated variable capacitance relative to rotor speed.
  • Slow speed, high torque version using OC's mechanical latches and high inertial wheel.
  • Stepper motor version like Cloud Campers that rotates the stator in 180 degree increments.
  • Alternative stator postions that may lead to multiple rotor actions from a single stator using different planes.

Your ideas?

Power Source

On March 11, 2008, User:Harvey wrote:

Original Message:
> Could you confirm for me that your circuit contains no battery
> or other input electrical energy charge? My understanding is
> that it is a self-propagating system (harnessing some yet-to-be-
> understood property of nature).

I'm sorry if some are confused over this. My circuit is powered by a wall adapter type stepdown transformer 120VAC to 12VDC.

I have looked at my video to see why some would think it is unpowered (as others have asked the same question)and I now realize that some may have thought the solenoid was an output coil. This is an input coil used to position the stator magnet.

The pulse to the solenoid is 40ms in the video. I have experimented with another retail solenoid and have been able to reduce the pulse width to 20ms. This is still 20 times greater than what I was looking for.

The unique nature of this approach is that the rotor is propelled by the stator, not the solenoid. This means that a large scale stator / rotor system could be propelled in a similar fashion with a very small pulse input on a control solenoid.

The video is a proof of OC's latch concept. It also demonstrates magnetic shear which allows the magnets to pass each other while minimizing negative torque on the rotor.

It is believed that Alsetalokin was able to achieve this same thing with the inertia of his stator. However, so far all replications have failed to provide sustained rotation without external energy added. I have done extensive rundown tests through a wide range of RPM's with my rotor and stators during corotation sync and did not find any indication that the system would sustain rotor rpm. Alsetalokin has indicated that he built a second unit that performs as the first but still does not deny an external source of EM power.

My video shows no external source of EM power is needed other than the 40ms pulse. And hopefully this can be improved significantly.


Harvey - includes link for sending a message to Harvey.

See also

- OC MPMM Magnet Motor - main page
- Magnet Motors
- Open Source Projects
- PESWiki

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