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Foretravel Owners' Forum

Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: Peter & Beth on August 16, 2010, 07:13:59 pm

Title: Alternator Output Voltage
Post by: Peter & Beth on August 16, 2010, 07:13:59 pm
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John Twork wrote: I would like to find some kind of an effective voltage regulator that I could put in line between the isolator and the alternator in the event of an alternator failure where it produces high voltage and high amperages, to protect the rest of the system.
I suggest that "others" verify the voltage produced by their alternators at the coach batteries and adjust it to the preferred level.

How is the alternator output voltage adjusted?
Title: Re: Alternator Output Voltage
Post by: Barry Beam on August 16, 2010, 07:38:35 pm
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How is the alternator output voltage adjusted?

http://beamalarm.com/Documents/voltage_regulator_adjustment.html (http://beamalarm.com/Documents/voltage_regulator_adjustment.html)
Title: Re: Alternator Output Voltage
Post by: Peter & Beth on August 16, 2010, 08:02:33 pm
Thanks, Barry.  Great help!
Title: Re: Alternator Output Voltage
Post by: Peter & Beth on August 16, 2010, 10:50:43 pm
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From: Barry & Cindy); By the way,  our alternator has a 3-step voltage regulator and will float charge both battery banks through the isolator at a lower voltage after driving a while.
There are many types of voltage regulators that will fit into our Prestolite-Leese-Neville alternators. Some adjustable, some 3-stage, some fixed, etc.

As I read the above, I was under the understanding that the Alternator had built-in voltage regulation which is self adjusting based on demand.  Is this right?
 
I get what Barry B. has in "beamalarm" insofar as a manual adjustment to change the setting for the voltage output from the alternator.
Title: Re: Alternator Output Voltage
Post by: Barry & Cindy on August 17, 2010, 01:45:42 am
No, not quite correct.
All 3-step/stage chargers and alternators change output voltage of charge following a specific pre-set pattern, based upon the voltage being sensed. But a greater demand will drop voltage, so in a way your statement is correct.
Title: Re: Alternator Output Voltage
Post by: Barry Beam on August 18, 2010, 02:52:33 pm
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I get what Barry B. has in "beamalarm" insofar as a manual adjustment to change the setting for the voltage output from the alternator. Thanks, Barry.  Great help!

Peter,
Since we were on the subject of Alternators.
I finished up some pages I have been working on and uploaded them.
Maybe they will be of some use to you.

http://beamalarm.com/Documents/removal_and_installation_of_the_102200_voltage_regulator.html (http://beamalarm.com/Documents/removal_and_installation_of_the_102200_voltage_regulator.html)

http://beamalarm.com/Documents/alternator_brush_inspection_and_replacement.html (http://beamalarm.com/Documents/alternator_brush_inspection_and_replacement.html)

http://beamalarm.com/Documents/alternator_disassembly_and_assembly.html (http://beamalarm.com/Documents/alternator_disassembly_and_assembly.html)

http://beamalarm.com/Documents/alternator_troubleshooting_on_vehicle.html (http://beamalarm.com/Documents/alternator_troubleshooting_on_vehicle.html)

Title: Re: Alternator Output Voltage
Post by: Peter & Beth on August 18, 2010, 03:08:44 pm
Barry,
 
Outstanding stuff.  Thanks so much for the work on this.
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