Tiny Powered Alternators & DC Generators

[rgleason]

I just found this very small noisy powered alternator.
DC Generator

--- 12V DC 600+ Watt ---
--- DC OUTPUT with Built-in 50 Amp 3-Phase Bridge Rectifier ---
(AC alternator shown in the picture)

Too bad they aren't diesel!


Here is a low rpm alternator

Helibug 12V 500 Watt Low RPM Axial Flux Alternator/Wind Turbine Alternator/Dynamo/PMA/Battery Charger

[HankOnthewater]

Originally Posted by rgleason

Here is a low rpm alternator
Helibug 12V 500 Watt Low RPM Axial Flux Alternator/Wind Turbine Alternator/Dynamo/PMA/Battery Charger

Maybe such an alternator would be good to be used on a propshaft, that is if cruisers still want that kind of thing.

[newhaul]

There are a few threads on here concerning coupling 400 or 500 amp eco-tech alternator's direct to small diesel motors making a very large dc charging supply for Lfp bank charging.
( just can't look them up on my tablet)

[gjordan]

I had a small gas powered two stroke DC generator in the 70s. I think it was called Tiny Tot or something like that. It was 12 volt only. It was basically a large model airplane motor and was so noisy that I had to leave the boat when it ran. It died a noisy death in Cabo San Lucas. With all of the small 4 stroke generators on the market, there is no reason to have an ear splitting high RPM unit. Just my 2 cents worth. ___Grant.

[newhaul]

Lots of good info here.
http://www.cruisersforum.com/forums/...or-193270.html

[GrowleyMonster]

Originally Posted by newhaul

There are a few threads on here concerning coupling 400 or 500 amp eco-tech alternator's direct to small diesel motors making a very large dc charging supply for Lfp bank charging.
( just can't look them up on my tablet)

A Brushless DC motor, mechanically driven and without a controller, is a three phase alternator. Just sayin. You could take a 5kw Motenergy brushless motor, drive it at 3000 RPM, and probably get a sustainable 3kw out of it with a 5HP gasoline engine. Might not be the most efficient generator, but engine @ $200, ME0201014201 motor @ $400, a Lovejoy coupling and a baseplate to mount it on, and you have a dandy little 3kw DC generator for not a lot of coin. No regulation, though. Ditch the rectifier and add the normal motor controller and enable brake regen ($500, approx for controller) and you have a still more capable setup. In fact, if you also couple the motor to the shaft with belt and pulleys and a pump clutch, you have a small hybrid propulsion system.

[swampbush]

Originally Posted by rgleason

I just found this very small noisy powered alternator.
DC Generator

--- 12V DC 600+ Watt ---
--- DC OUTPUT with Built-in 50 Amp 3-Phase Bridge Rectifier ---
(AC alternator shown in the picture)

Too bad they aren't diesel!


Here is a low rpm alternator

Helibug 12V 500 Watt Low RPM Axial Flux Alternator/Wind Turbine Alternator/Dynamo/PMA/Battery Charger

Christie Engineering in Australia make petrol and diesel units. Powerful but not silent pack units like a Eu20honda.
http://www.christieengineering.com.au/products.html

[john61ct]

ZRD

Balmar's APC

Fischer Panda

PolarPower

Norwall

Ample Power's Genie

Alten-DC

Torcman

Supercharger UK

MacFarlane

PortaCharger


If you can't find via googling lmk and I'll try

[denverd0n]

Hmm... The link says it is "12-volt max." So, does that mean it can generate the 14 or so volts required to recharge a 12-volt battery? Or does it really mean that it generates a maximum of 12-volts? If the latter, then it would be useful for running 12-volt devices, but NOT for recharging a 12-volt bank.


I would want to make certain of what "12-volt max" means before I bought one.

[Colin A]

They actually make tiny water cooled engines of 1-2 HP for RC boats and they make electric starters. Seems like you could make a cool little emergency charger with one. Of course you would have to modify the carb and ignition to be ignition proof somehow. I have considered you could also make one with a starter generator that could start the engine then switch to an gen.

[john61ct]

Figure 20A per horse at 12V at the low end.

Of course running a small engine at max output is not good for longevity.

[newhaul]

Originally Posted by Colin A

They actually make tiny water cooled engines of 1-2 HP for RC boats and they make electric starters. Seems like you could make a cool little emergency charger with one. Of course you would have to modify the carb and ignition to be ignition proof somehow. I have considered you could also make one with a starter generator that could start the engine then switch to an gen.

my volvo me has that a dynostarter and it produces 11 amps out so not really the best for charging a house bank.

[rgleason]

11 amps would be fine in Absorption mode for smaller banks.
If it were small quiet and diesel it'd be great.

[newhaul]

Originally Posted by rgleason

11 amps would be fine in Absorption mode for smaller banks.
If it were small quiet and diesel it'd be great.

well an md1 or md2 are not known as quiet engines but it is my main not a genset.
That's what my solar is for.

[rgleason]

A little to big but it is diesel.
https://www.carrollstream.com/Kohler...t-p/kd-350.htm


B-Series, small diesel engine, single cylinder engineÂ*- Hatz Diesel
1.5kw to 3.5 2 - 4.2hp


https://www.alibaba.com/product-deta...56531dd389XHeo

https://www.alibaba.com/product-deta...56531dd389XHeo

Need maybe 3hp.