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Perendev Magnetic Motor Analogue Winds Down
Message 1http://groups.yahoo.com/group/energy2000/message/23158 I have seen first-hand three magnetic motors running and have written cost feasibility and reproducibility reports on all three. Two of them I had in my lab and my staff used the inventors' plans to build several working replicas. We also went and saw, first-hand, the Perendev device. All three designs used "Rare Earth" magnets (Neodymium, or more correctly stated, Neodymium Iron Boron or NdFeB) and our various reproductions used NdFeB, SmCo and Ferrite magnets. We did not attempt to reproduce the Perendev device because of its design proximity to one of the other two. The results were always the same: they all run down. Under load, they run down very quickly. It doesn't take very long for magnets to lose their magnetism when they are constantly being put in opposition to one another. Every magnet has a "maximum energy product" rated in Mega Gauss Oersteds, MGOe. This is the amount of work a magnet can do before its level of magnetism has deteriorated to the point that its energy doesn't reach out far enough to affect anything surrounding it. Contrary to the popular notion that rare earth magnets are invincible, even the most expensive sintered NdFeB magnets max out at less than 50 MGOe. If they are used in a device that puts them constantly in opposition, they will run down, and this is the whole assumption behind so-called "magnetic motors". The amount of energy used in manufacturing a magnet is typically 10 times what the magnet is capable of producing. More expensive magnets are even less efficient. Add to this the losses in energy incurred by these 33%-66% concept magnet devices themselves, and the energy consumed in the overall manufacturing process is 20-25 times the energy you will get out. There are situations where these types of devices may be useful, but they are
not "free energy", nor do they represent any sort of "overunity"
phenomenon, nor any solution to the energy crisis. Message 2http://groups.yahoo.com/group/energy2000/message/23160 Without putting the magnets in opposition at some point during the cycle, and probably for at least 33% of the time, you will have the same problem that exists with the many hypothetical gravity motor designs that don't work. What goes up, comes down. Nothing will simply come down without having gone up first. You have to treat magnets a lot like springs from a design standpoint, although the mechanics of magnetism aren't as simple as that of springs. There are billions of spring-powered motors in the world: clocks, toys, etc. They all run down. Nobody will ever design a spring-powered motor that runs forever without winding. Message 3From: "Keith Anderson" <keith@purescience.co*m> Message 4From: "Keith Anderson" <keith@purescience.co*m> My parent company is Solar Thermal Energy Project (STEP) Corporation, and the STEP Group of Companies, with multiple locations, but will soon be consolidating to Utah where our $50 million STEP Solar Energy Park will be under construction starting next year. The company that paid for the evaluation was someone interested in the Perendev device from a business standpoint, and they hand-carried it to Colorado where we tested it. I am unsure whether it was the original machine or a duplicate. We were paid in advance to perform the tests according to a negotiated contract. This is an old client, and confidentiality is part of the reason they keep coming back to us. I have recently been directed to the Perendev web site where videos are shown
of an operating Perendev magnetic device. I can confirm that the device does, in
fact, spin as shown in the video. I can also say I was surprised at the claims
they make on that web site. Counter Point: Magnets Don't Demagnetize When Kept Within Their RatingPeople know that in a car, you don't run the engine rpm's up into the red line, and certainly you don't go above the read line without risking your engine, not just for that moment, but henceforth. You damage the engine. Same thing holds true of magnets. If you stress them, they will
demagnetize. This has been shown in the laboratory. Magnet
specialists know what a magnet's capabilities are, and know what the magnet's
limits are. Holds True in Electro-Magnetic Motors"There are many Permanent Magnet motors in the world that continually
apply similar magnetic loading forces as what the Perendev motor might
experience. As long as the motors are not abused and properly cooled (and not
overloaded or stalled in locked rotor mode), the magnets typically last for
thousands of hours. Sterling's Comment -- Wind Turbine AnalogyIf a magnetic motor were feasible, I had envisioned that it would be
operating like a turbine -- tapping into some magnetic field in a way not yet
fully understood by science. I would like to think that Mike Brady will
yet come through. He claims to have tested the gauss of his magnets and
that it does not weaken in any detectible way. Mike Brady Knows of No Test in ColoradoNov. 2, 2004 Kieth Anderson replies that he cannot divulge client specifics. What he
can say is: "Prior to the contract we were told it was the Perendev motor
and were referred to the web site. I don't believe we had any further
conversation about the origin of the device." (Nov. 3) See also
Page posted by Sterling
D. Allan Oct. 23, 2004 |
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