 motorcycle ignition coils???
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jameselectric
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Tue Sept 04 2007, 04:51AM
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Registered Member #535
Joined: Sun Feb 18 2007, 06:03AM
Location:
Posts: 65
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Okay these are from some motorcycles I had. The coil on the left supplied one piston. The one on the right supplied 2 pistons. They would fire alternately. I have 2 of the one on the right. These supplied a 4 cyclinder cbr 600 that I had. Are these usable with a suitable driver?? I know people use car coils but I have yet to see some motorcycle coils. Also is my flyback wired right. 5 turns of 18 and 3 turns of 22.
Thanks,
James
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Sulaiman
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Tue Sept 04 2007, 12:51PM
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Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
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The coil on the right has both ends of the secondary winding as output
Two cylinders get a spark at the same time
the cylinder with compressed fuel/air needs a higher voltage than the other
so most of the spark energy goes to the required spark gap/plug.
There's no reason why you couldn't use motorcycle ignition coils in a flyback circuit
double-ended coils can give very high voltage outputs.
(e.g. 555, mosfet/igbt. coil)
P.S. Please don't use any design that uses a 2N3055!
I prefer igbt to mosfet for ignition coil drivers but either will work
use a transistor with a HIGH voltage rating because the maximum output voltage will be
(Transistor voltage rating - Supply votage) x (Secondary turns/Primary turns)
I'd expect (Secondary turns/Primary turns) to be about 100
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