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Briggs & Stratton Stator

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n4zq(at)verizon.net
Guest

Posted: Mon Apr 06, 2015 4:50 am Post subject: Briggs & Stratton Stator

Hi Bob,I’m hoping you could offer your opinion on whether the

LS-1A or the LR3 Controller could handle the output from two fixed stators ganged together in this fashion.

The application is for the Solar T62-32T turbine power plant installed in the Helicycle chopper.

The original design called for only one stator which limits the charging ability.



Thanks,



Angier Ames

Hamilton, MA

978-468-4565

[img]cid:8A3AF7F3-E161-40C5-A52E-D8C5D199B84E(at)home[/img]

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user9253

Joined: 28 Mar 2008
Posts: 1938
Location: Riley TWP Michigan

Posted: Mon Apr 06, 2015 6:11 am Post subject: Re: Briggs & Stratton Stator

The LS-1A and LR3 regulators are for alternators with a field winding.  If the Briggs & Stratton alternator is a permanent magnet type (dynamo), then a permanent magnet type regulator must be used.

http://www.bandc.biz/regulator14vhomebuilt.aspx

You might consider using two regulators, one for each stator.  The aircraft loads could be divided between the two, perhaps lighting on one and avionics on the other.  The two regulators would have a common ground, but separate main buses.

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_________________
Joe Gores

user9253

Joined: 28 Mar 2008
Posts: 1938
Location: Riley TWP Michigan

Posted: Mon Apr 06, 2015 6:18 am Post subject: Re: Briggs & Stratton Stator

It is not a matter of a regulator handling the alternator output, but rather the ability of a regulator to handle the aircraft load.

Joe

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_________________
Joe Gores

nuckolls.bob(at)aeroelect
Guest

Posted: Mon Apr 06, 2015 11:26 am Post subject: Briggs & Stratton Stator

At 07:49 2015-04-06, you wrote:

Hi Bob,



I'm hoping you could offer your opinion on whether the

LS-1A or the LR3 Controller could handle the output from two fixed 

stators ganged together in this fashion.

The application is for the Solar T62-32T turbine power plant 

installed in the Helicycle chopper.

The original design called for only one stator which limits the 

charging ability.



   As Joe correctly points out, the alternator controllers

   you cited are for automotive style, wound-field alternators

   either designed for or modified to run externally regulated.



   The stators you illustrated are interesting. I'm curious as

   to what the magnet-ring or rings look like to work with

   dual coils.



   It appears that the two stator's leads are brought

   out separately . . . and further . . . offset

   rotationally from each other. This offers an opportunity

   to rectify them separately (2-phase) and combine the

   outputs of the rectifiers for a much smoother DC

   power product (the RMS ripple on rectified DC from

   a 3-phase automotive machine is about 5% pk-pk. 2-phase

   would be larger . . . ~15% but still less than single-

   phase at 100%.



   This not-quite perfect DC would then need to be

   regulated with something more sophisticated than

   the legacy rectifier-regulators used with PM

   alternators. A switch-mode regulator would probably

   fill the bill.



   Have you seen any numbers on the charging rates

   in amps before and after for upgrading to two stators?



   Bob . . .

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