Jay Summet via EV wrote:
When I ran the motor off a 12 volt battery it was fine.
Aha; that's good!
I'll try
installing a spare fuse and see what happens after I put things back
together.
A fuse is just a piece of wire, carefully chosen to melt if you exceed a
certain current. So you can make a temporary fuse to test things without
the risk of popping an expensive precision fuse.
Look up Onderdonk's equation: It tells you the approximate fusing
current of an ordinary copper wire in still air at room temperature.
I = (0.148 x A) / SquareRoot(T) where
I the current in amps where a copper wire will melt
T is the time to melt in seconds
A is the cross-sectional area of the wire in circular mils
(look it up in a wire table)
Example: #18 wire is 1624 circular mils. It will melt in about 1 second
at I = (0.148 x 1624)/sqrt(1) = 240/1 = 240 amps.
Warning: It will go out with a *bang* like a firecracker, throwing
little balls of molten copper around as it does! Make sure it's
surrounded by something that won't burn (just like a real fuse).
--
Teaching children to program goes against the grain of modern education.
Just imagine the chaos if they learned to think logically, plan, create,
implement, test, and execute!
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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