OS:CD Motor What to expect
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What to Expect
What to expect from building the CD Motor as describe in the CD Motor open source project.
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What is the big deal about the CD motor?
As prepared by Tim Harwood, March, 2006.
What NOT to expect
- Do not expect torque, because this motor can not deliver.
- 4/3 layouts can improve torque, but its still poor
Performance profiles
The motor is a back-emf battery charger.
Loading the motor will diminish this effect.
Thermals
The motor exhibits a cooling effect. I noticed a genuine ambient heat suck effect on the stator supply wire. The circuitry will be cool as well. The temperature of the stators depends upon configuration. Temperature drops were confirmed with digital scope probes with 3 ohm coils and 24 awg wire. However, optimal performance was noted with 6-9 ohm coils. In this case, the stators run a few degrees above ambient, but this is FAR below the temperatures they run at when pulsed at equivalent duty in a static setup. I always thought the thermals were the clincher that SOMETHING was happening. Input/output can be disputed to a certain extent, but temperature drops below ambient were pretty clear evidence of energy gain i.e. an undocumented thermoelectric process.
Is a self runner possible?
In my opinion, yes. A number of motors clearly came very close. For example, with magnetite cores, one experimenter got 97% of input recovered as back emf output. But that was with relatively poor transistor based circuitry.
At the time of the original Egroup, many people were building different devices, and it took time for best practise to emerge. The PESWIKI entry represents the culmination of much hard work from many people - all undertaken without financial compensation.
It is worth stating that the Egroup closed before any one device had been built that integrated all the material, circuitry, geometry, and layout enhancements, that had been developed. Were such a device to be constructed, I am sure even with MOSFET based commutation, a self runner could be constructed.
Lacking the time I would wish to dedicate to this ongoing work, the CD motor has now become formally open source, and is open to being concluded by a new generation of pulse researchers. The public disclosure of the Adams motor technology in 1992 means there are no valid patents in this area that would stop research. It would be nice to see a simple induction coil-to-MOSFET timing circuit developed for the motor.
Input voltage
The CD motor appears to tap into the same basic physics that drives the so called cold fusion experiments. Proof of this can be seen in the 240v input value that was highlighted in JLN's cold fusion experiments (http://jlnlabs.imars.com/cfr/html/cfrdatas.htm). If you can get break-even @ 12v on the back emf, as with cold fusion, you'll go over-unity @ 240v. HOWEVER, 240v experimentation is AT YOUR OWN RISK. The other problem is keeping the input as crisp and clean at 240v, as at 12v, and then capturing the resultant back-emf. Higher voltage rated parts tend to conduct current worse, hurting system efficiency. The classic mistake everyone always makes is ramping the input voltage at a premature stage in research, before they have optimised the pulse apparatus.
Potential applications
Hard to see any. There have been 2/3 attempts to go commercial with these pulse motors, and none of them resulted in any real product. While over-unity back emf does appear to be possible with good quality industrial grade mechanical switching, these solutions are not an attractive high volume manufacturing proposition.
In addition, since you can not make the stators bigger, the only way to scale output is to put multiple 8 pole rotors on an single shaft, typically 4/5. This results in weight, and cost. Output tends to be routed into battery banks, since it is exotic. The battery banks convert the exotic output into normal current.
The motor itself is only ever going to offer low toque, and could not have any real use beyond fans, or other low load scenarios. I would say the experiment is more of an educational toy, than a commercial proposition, hence the OS status of the project.
CD motor in hindsight
When I begun work on this device, it was the common wisdom that KHz frequencies, and hundreds if not thousands of volts, would be required to manifest exotic over-unity physics, using multiple powerful NIB magnets, or even high intensity rotating plasma fields. The enduring achievement of the CD motor project was to make over-unity pulse research cheap, accessible, and repeatable.
See also
- CD Motor Open Source Project - main page
- Other open source projects
- PESWiki home page
