-----Original Message-----
From: Nick Palmer <[EMAIL PROTECTED]>
To: vortex-l@eskimo.com
Sent: Sun, 26 Feb 2006 12:29:33 -0000
Subject: Re: Sprain Mag Motor
Terry - this motor looks like another variation on the "regauging"
idea. Permanent magnets on the rotor are attracted to others on the
perimeter, spaced progressively closer to the rotor so there is a
magnetic "hill" to go down. At the bottom of the hill is a pulsed
electromagnet to pull the rotor magnet past the bottom of the hill and
"regauge" it. Surely these motors fail because the amount of energy
needed to "regauge" is equal to, or in excess of, that which can be
extracted from the rotor as it goes round?
<><><><><><><>
I'm glad you asked. <g>
According to the inventor, and as I observed. The rotor will not
self-start. You can place it in most any position and it will not move
with a load on the shaft. Paul initiates the rotation (as can be seen
in the vid) by passing one of the rotor mags near the emag. Position
sensors "wake up" the microcontroller, Paul gives the rotor a kick
start, and away she goes.
Position sensors at the bottom of the shaft determine when to fire the
emag. The emag (electromagnet, btw) fires just when the rotor mag
begins to exit the field. The short pulse momentarily negates the
attracting field of the mag with the smallest airgap to the rotor
allowing the rotor intertia to take it over the hump and onto another
cycle.
Now, the shaft is split between the rotor and the top bearing and load
device. In the split is a $10k custom built, hall-effect torque
sensor. This is the only device with which I have no experience. I
will return with my ME buddy to take a look later; but, having faith in
who seems to be an honest inventor, I believe the device accurately
measures the torque on the shaft.
Paul applies a load on the bearing side of the shaft with the screws
visible in the image:
http://www.geocities.com/terry1094/load_screws.jpg
The display for the load sensor reads 0.6 Newton-meters as the device
rotates. The electrical pulse:
http://www.geocities.com/terry1094/pulse_display.jpg
Indicates less that he is inputting less than 1.1 Watt-seconds of
electrical energy into the pulse. In 3*Pi radians (1.5 rotations) he
has input less than 3.2 Ws (3 pulses) and output around 6 Nm of
mechanical energy (1 Nm = 1 Ws = 1 Joule). This is a COP of 1.88.
Regauging? Call it what you may, I think it just might be the Holy
Grail.
Terry
PS I have blind copied the inventor to be sure I have not made any
mistakes here.
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