I'm not familiar with regen with AC motors. But, on my boat with the 48 volt DC Thoosa 9000 system. I just move the forward control a little to say maybe a 10 amp draw which gives me a little forward speed in light winds and eliminates any prop drag. I then watch as the current goes down as the wind picks up until it finally switches positive and regens back to the battery. It's a beautiful thing to watch
On Saturday, May 1, 2021, 02:14:17 PM EDT, Ryan Scott Dancey <rsdancey@gmail.com> wrote:
Sailing Uma talked about this in one of their episodes.
The problem is that you have to energize an AC motor which requires some draw on the system. Until the prop is spinning fast enough to generate net energy, regen isn't doing anything but depleting your bank.
I think Dan had some crazy system where they ran the motor in reverse at a low draw to energize the motor and get the (folding) prop spinning, and then if the prop turned faster due to the motion of the boat through the water they'd get some regen. But I think they wrote the whole scheme off as not worth the effort.
(This was on their original forklift motor, not their current saildrive).
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