Quoting Jay Summet via EV <ev@lists.evdl.org>:
The wind generator may (in higher wind speeds) be able to produce a
voltage high enough to charge the 48 volt battery.
The wire size shouldn't be an issue, as at 48 volts the wire will
see less current than at 32 volts.
I was thinking that might be the case.
It is likely your wind generator has a piece of electronics or
charge controller associated with it that takes the AC power the
generator makes and converts it to DC output to charge a battery.
You will likely need to modify or replace this piece to successfully
charge a 48 volt battery.
I tried to put as much system information as I could into my
question as I could however, "vintage Jacobs" needs more
explanation. This generator was made in about 1948, is
DC(commutator), no electronics or gears(mechanical governor), direct
drive, I understand, the transistor came about in 1947.
[Perhaps the 32 volt from the wind generator is AC, and a
rectifier/charger was used to step that down to 24 or 14 volt
charging?]
Jerry Lilyerd at Sun Energy likes the 48 volt OutBack inverter for
its ease in field service and its sine wave output. I believe they
have a long history that is built on the work of others. That is the
reason I want to go 48 Volts. We like our custom built 120 Volt
inverter but the Tesla wants a sine wave.
Even if the voltage output of the generator is too low to directly
charge the battery, you can purchase a "step up" converter that can
take 12-24 volts and step it up to the 48-55 volts needed to charge
a 48v battery. (But will lose some power in the conversion process.)
Yes, I will look into purchase of a "step up" converter. Thanks much...Ron
Jay
On 4/22/19 11:48 AM, Ron Solberg via EV wrote:
Quoting Lee Hart via EV <ev@lists.evdl.org>:
QUESTION ON A PROPOSED 32/48 VOLT DC MIX:
Since I just monitor the EVDL, I have not learned the correct
procedures to post. I hope that jumping in here with a question
will be acceptable.
Question: Will a vintage 2800 watt, 32 Volt Jacobs wind generator
charge an L16 FLA, Interstate 48 Volt battery?
The Proposed System:
A 48 Volt DC to 120/240 AC Out Back inverter would be fed by a
4000 or 8000 Watt PV panel. My question then, is it feasible to
add the 32 volt wind plant to charge the battery on a cloudy day?
My hope is that despite the wire size(for 32 volt) of the generator
windings, the generator field will"see" the 48 volt battery in a
positive way. I could adjust the wind plant governor. I see this
as an experiment so I can use all the help I can get should I
proceed in that direction.
The Goal:
Our Tesla Model 3 rejects the AC output of our present tracking 3
KW PV 120DC/120AC system. We plan to add the second, independent,
non tracking system since the Out Back inverter produces a sine
wave that is acceptable to the Tesla as was proven by Jerry lilyerd
at Sun Energy.
Thanks for the service you provide,
Ron Solberg
Michael Ross via EV wrote:
Keep in mind that many hand held meters cannot accurately report
mOhms. You
should look up the specs on your meter to see what it is actually capable
of.
Indeed, most normal meters are inaccurate below about 1 ohm. Their
own lead wires and internal circuitry adds more resistance than
that.
There are special meters for measuring very low resistance values
(usually called "milli-ohm" or "micro-ohm" meters. They usually
make 4-wire measurements. Four wires connect to the unknown
resistance; two supply a known current, and the other two measure
the (tiny) voltage produced by this current. This method cancels
out the resistance of the wires and connections themselves.
--
Fools ignore complexity. Pragmatists suffer it. The wise avoid it.
Geniuses remove it. -- Alan Perlis, "Epigrams on Programming"
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com[1][1]
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