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n4zq(at)verizon.net Guest
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Posted: Mon Apr 06, 2015 4:50 am Post subject: Briggs & Stratton Stator |
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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
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Posted: Mon Apr 06, 2015 6:11 am Post subject: Re: Briggs & Stratton Stator |
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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 |
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user9253
Joined: 28 Mar 2008 Posts: 1938 Location: Riley TWP Michigan
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Posted: Mon Apr 06, 2015 6:18 am Post subject: Re: Briggs & Stratton Stator |
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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 |
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nuckolls.bob(at)aeroelect Guest
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Posted: Mon Apr 06, 2015 11:26 am Post subject: Briggs & Stratton Stator |
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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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