Because I don't want to run the big engine every time I want to charge batteries, and I want a redundant mechanical charging system in case the main engine quits on me. So I figured the Beta 10, and a motor ran by the Beta in regen mode, might be a good way to go. Also I need some flexibility. The bank will be 96V but if I get a shorted cell and remove a battery from the bank, I am down to 93V and so on. I need to be able to adjust charge voltage appropriately. With my manual charger, that is no problem. I can easily charge any size bank from 130V down to a single cell. But it requires an AC input of appropriate voltage, (think 110VAC to 125VAC), preferably around 60Hz, +/- 10Hz or so. The manual charger, in reality just a big Variac and a rectifier, will still be used for shore power charging, especially when an equalizing charge is needed. An alternator with external regulation controllable via potentiometer and capable of charging a 96V bank at a decent current, would work, sure. But there will already be a BLDC motor belt coupled to the prop shaft, which can itself be used to charge the bank in regen mode, and so a 96V alternator mounted on the engine would be unnecessary. The original alternator will be retained for charging a start battery.
---In electricboats@yahoogroups.com, <nov32394@...> wrote :
On Fri, Oct 5, 2018 at 6:20 AM, clh5_98@... [electricboats]<electricboats@yahoogroups.com> wrote:Great ideas. You can also run your windlass and thruster with a Kelly controller. I bought a 24 volt windlass and run it off my 48 volt pack through a Kelly controller. Works great. I posted my schematic here a few years ago.
Chris
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