Re: What is a reactance coil on a 103 SP?

nerobro /
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Since the power on the bike is AC, a coil will act nearly the same as a resistor in a DC system, taking some of the voltage out of the system. Now instead of just using a resistor which provides the same ohms no matter what frequency the AC of the alternator is giving, the coil provides less resistance at lower frequencies. That means when the bike is making less power, from the stator, more of the power goes to lighting. at higher rpms, when the freqency goes up, the coil starts working as a resistor, keeping the voltage reasonable.

It's a decent way of providing some voltage regulation without resorting to rectification and a ziener diode. Or other sort of voltage regulator.

And because I said the same thing in the general forum just a few hours ago...

https://www.mopedarmy.com/forums/discuss/1/652535/652193/

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