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Old 11-04-2012, 06:14   #16
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Re: car alternator as wind generator???

these guys seem to have taken a bit of a look at the idea for third world application - that'd be me...

http://www.icrepq.com/PONENCIAS/4.288.FERNANDEZ.pdf
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Old 11-04-2012, 06:55   #17
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Re: car alternator as wind generator???

a second hand stepper motor would be a better choice!
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Old 11-04-2012, 07:52   #18
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Re: car alternator as wind generator???

The best alternators for this applications, wind, hydro etc., are low rev. Permanent Magnet Alternators like in the picture below.

One or two years ago "atholl" found this link. I really like them, robust and build with Delco parts.

Link: Wind Blue Poower DMA

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Old 11-04-2012, 07:56   #19
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Re: car alternator as wind generator???

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Originally Posted by CeesH View Post
The best alternators for this applications, wind, hydro etc., are permanent magnet generators like in the picture below.

One or two years ago "atholl" found this link. I really like them, robust and build with Delco parts.

Link: Wind Blue Poower DMA

CeesH
And you won't need a battery to run this one.
cheap temp gauge
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Old 11-04-2012, 08:45   #20
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Re: car alternator as wind generator???

A belt driven automotive alternator is not going to make a decent wind generator. The belt drive system sucks up a lot of power, and the field current will suck up the rest. You would need about 12 ft diameter blades to provide enough power to overcome the losses.

You really need a permanent magnet alternator.
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Old 11-04-2012, 09:09   #21
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Re: car alternator as wind generator???

When you want to use an automotive alternator for 12V system, you need to increase the number of stator winding's to bring down the kick-in revs to get it start to charge. To do this you can use a 24V automotive alternator and a 12V regulator. With this setup you bring down the kick-in charging revolutions to an usable figure. Example, for a typical Bosch 12V 35A alternator you bring the kick-in revs form 1500 rpm to an acceptable 650 rpm. With 800 rpm this set-up already supplies 9A with 1000 rpm 16A. An idea for a propeller-shaft generator!

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Old 11-04-2012, 10:39   #22
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I use a industrial fan that I got at Home Depot to make wind when there is none.
I aim it at my wind generator blades and it produces power . I can also use it to sail by turning it towards my sails...works great.
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Old 11-04-2012, 16:13   #23
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Re: car alternator as wind generator???

charley, it isn't a dumb question but the answer is go look up the specs. On any alternator. Those Blue Power specials need to turn at 1000 rpm to get full output. Conventional alternators need about 2500 rpm to get full output. The speed varies with each unit. Wind generators just don't get anywhere into that rpm range and in order to turn a conventional alternator you could easily rig the windgen to a pulley about the size of a conventional bicycle wheel (27") and then direct drive the alternator from that. Except that would be a bit ungainly hanging on a boat.

Just look up some alternator specs and do the math. They need rpms, windgens don't spin fast. You figure out a way to gear them up so both sides are happy, and you've got a solution. Couple of hydraulic turbines maybe? <G>
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Old 11-04-2012, 19:11   #24
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Re: Car Alternator as Wind Generator?

When you look at RPM the purpose built wind Generators are relatively slow, the Air breeze has a max rpm of 700 and starts to put the break on at 500 RPM.
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Old 11-04-2012, 22:41   #25
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Re: Car Alternator as Wind Generator?

I can't help thinking, a hydraulic turbine pump in the windgen, two small hoses coming down and another hydraulic motor turning the alternator 10x faster.

Any hydraulic masters around who can either shoot that down or figure it up real fast?
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Old 12-04-2012, 06:36   #26
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Re: Car Alternator as Wind Generator?

Hydraulic pumps? There go your savings. By the time you buy your pumps, hoses, turbine, ss shaft, bearings, sheaves and the alternator, which is mounted in the glass house you just built, you could have purchased a marine factory built wind generator with a warranty.
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Old 12-04-2012, 06:50   #27
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Re: Car Alternator as Wind Generator?

I looked a using generators, alternators and motors but found that the specifications either did fit the intended use or the cost was not worth the time and money. What I did find was a Gudcraft 400X wind generator for 400 bucks and put it on my sailboat. It looks kind of ugly but works great. It is six bladed and in quiet with very little vibration.

You can find them on Amazon.com by typing in marine wind turbine in the search dialog box.
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Old 12-04-2012, 06:52   #28
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Re: Car Alternator as Wind Generator?

Quote:
Originally Posted by LostAtSea2011 View Post
I use a industrial fan that I got at Home Depot to make wind when there is none.
I aim it at my wind generator blades and it produces power . I can also use it to sail by turning it towards my sails...works great.
Great someone has finally over come the effective prevention to Perpetual Motion and the issues with Newtons third law. Excellent
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Old 12-04-2012, 07:47   #29
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Re: Car Alternator as Wind Generator?

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Originally Posted by hellosailor View Post
I can't help thinking, a hydraulic turbine pump in the windgen, two small hoses coming down and another hydraulic motor turning the alternator 10x faster.

Any hydraulic masters around who can either shoot that down or figure it up real fast?
You loose around 10%> of the power through mechanics. Direct drive is most economical.
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Old 12-04-2012, 08:33   #30
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Re: Car Alternator as Wind Generator?

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Originally Posted by Rayallyn View Post
I looked a using generators, alternators and motors but found that the specifications either did fit the intended use or the cost was not worth the time and money. What I did find was a Gudcraft 400X wind generator for 400 bucks and put it on my sailboat. It looks kind of ugly but works great. It is six bladed and in quiet with very little vibration.

You can find them on Amazon.com by typing in marine wind turbine in the search dialog box.
How's that working out for you? Is 400W enough? You must have a small charger & bank?
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