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Author Topic: How do I slow down the charge rate of a 10DN to 7 - 10 amps?  (Read 2751 times)

rweis

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How do I slow down the charge rate of a 10DN to 7 - 10 amps?
« on: September 03, 2014, 04:09:26 AM »
I am building a lawn mower powered battery charger but want to charge a deep cycle battery a a slow constant rate of about 7 - 10 amps without overcharging it.  How can I reduce the output of a 10DN alternator to slow charge?
Would a 50 ohm / 50 watt rheostat on the field wire allow me to adjust the charge rate without damaging the 10DN?
I can slow the rpm of the alternator down to about 2000 rpm with pulley ratios but output graphs of the 10DN show that well above the target 7 - 10 amp charge rate.
My external voltage relay (9212S) has a 14.2 volt regulator on it that I think will keep the battery voltage within a reasonable charge limit.

Any ideas would be really appreciated

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How do I slow down the charge rate of a 10DN to 7 - 10 amps?
« on: September 03, 2014, 04:09:26 AM »

drew

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Re: How do I slow down the charge rate of a 10DN to 7 - 10 amps?
« Reply #1 on: June 22, 2015, 03:12:46 PM »
Yep, putting a rheostat on the field wire will let you adjust the charge rate to your liking. Reducing the RPMs is not recommended, as alternators give smoother output at higher RPMs.