Author Topic: Wiring 3 phase alternator to Bridge Rectifier.  (Read 5491 times)

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wtfpylons

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Wiring 3 phase alternator to Bridge Rectifier.
« on: March 07, 2009, 11:26:04 PM »
I am building a wind turbine that for initial testing will be 25-35amps and am wanting to use this product from radio shack


http://www.radioshack.com/product/index.jsp?productId=2062584&tab=summary


I don't see the diode connectors, and I am unschooled in everything I need to know to understand the difference between this, and other bridge rectifiers I have seen.


does anybody have a proper diagram or something to show me how to connect the bridge rectifiers into the three phase alternator? I know how to make the bridge rectifier with the heat sink, but I want to know the progression from alternator to battery.


thanks,

« Last Edit: March 07, 2009, 11:26:04 PM by (unknown) »

ghurd

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Re: Wiring 3 phase alternator to Bridge Rectifier.
« Reply #1 on: March 07, 2009, 05:22:38 PM »
Not good.  I would not trust it.


That 25A is maximum, and they will not be happy running at 25A for long.

May be able to squeak by a bench test using 3, instead of 2.


The 50V is low.


I like metal bridges.


The photo is taken from the heat sink side.  The other side has 4 terminals like are usually shown.


Our hosts have 35A 200V bridges.

I would use 3 bridges if you expect to go past 25A, or up to 35A.

http://www.forcefieldmagnets.com/catalog/product_info.php?cPath=22_30&products_id=98&osCsid=
quuitmrea989i840q6p4c8ehj7


The alternator has 3 wires.  With 3 bridges...

Each alternator wire goes to its own bridge, and connects to both bridge AC (~) terminals.  

The bridge + goes to the battery +.

The bridge - goes to the battery negative.


The positive terminal is often turned 90 degrees from the others (like Dan's bridge photo), or has a corner angled (RatShak photo), and is usually marked +.


The AC terminals are next to the + terminal, and are often marked AC or ~.


The negative terminal is opposite from the positive terminal.


They need serious heat sinks, and heat sink compound.

G-

« Last Edit: March 07, 2009, 05:22:38 PM by ghurd »
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wtfpylons

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Re: Wiring 3 phase alternator to Bridge Rectifier.
« Reply #2 on: March 07, 2009, 05:34:17 PM »
thank you very much, this is alot better than what I was considering.
« Last Edit: March 07, 2009, 05:34:17 PM by wtfpylons »

Rover

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Re: Wiring 3 phase alternator to Bridge Rectifier.
« Reply #3 on: March 08, 2009, 03:20:39 PM »
I use 35 amp 3 phase bridege rectifiers from allelectronics... one bridge , easy wire up. So far it has handled over 40 amps during extremely high winds. Cost of the rectifer is 10$
« Last Edit: March 08, 2009, 03:20:39 PM by Rover »
Rover
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