- #1

xclr82xtc

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coil info

1x1x2

80 turns total, 4 rows of twenty.

center line of coil is 34 inches.

the magnets making 1 revolution per minute would pass the coils at X coils per second...lets figure out X

circumference of a 34 inch circle = 106.8 inches

divide that by 60 seconds...106.8/60= 1.78

so EVERY SECOND...the magnets travel 1.78 inches. in turn, the magnetic fields pass through the coils at the rate of 1.78 inches per second?

am i right to this point?

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there is 80 coils in 2 inches, so in 1.78inches we would have 71.2

the tesla of the magnets is .6403

the area is .75inchx2inch then change to meters squared = 0.003610meters squared

faradays law

N = -1 * (-V/ (( tesla * area meters squared)/ seconds))

71.2=-1*(-V/((.6403*.003610)/1.78)

-71.2=(-V/.00129)

.0918=V

so right now we have 71.2 turns = ..0918 v at at rate of 1 rpm...

now there is 7 coils of 80 so that's 560 total turns

divide by 71.2 =7.87

so times 7.87 time the Voltage .0918

=.722 volts per phase...

my math looks more right this time lol

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now how many feet of wire in a coil (we need to find the resistance)

wire info

Nominal Diameter: 0.10 inch

Nominal OHMS/LB. -20 Celsius: 0.0314

Feet/LB: 31.48

outersize of coil is 1 inch. 4 layers and the core is .6inches.(yes this does take into account wire size) .so the perimter for one layer of turns is (.7*4)+(.8*4)+(.9*4)+.(1*4)=2.8+3.2+3.6+4=13.6inches

now the coil is 2 inches long so we need have 20 layers...20*13.6=272inches...divde by 12=22.6 feet or wire per coil...nice. lol

ok so now we know we have 7 coils so 22.6*7 = 158.2 feet.

its 31.48 feet per lb so 158.2/31.48=5.025lbs

5.025 * .0314=.1578

so the TOTAL resistance of all seven coils is .1578ohms

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so now we know the total voltage of one phase at 1 rpm of the mill, and we know the constant resistance of the coil. (i also have the inductance of each coil but i don't think we need it.)

so with this info, we SHOULD be able to figure out the amps using ohms law. i=v/r

.722/.1578=4.578AMPS

SOOOO...per phase, at 1 rpm we have 1.29 volts and 4.578amps. kinda crappy, but hey its only turning at 1 rpm, and that's only using 1 pair of magnets, there is 15 total pairs.