Does your car have two 12 V alternators? One side of the alternator goes to the case so you can't have the mounting mechanism be metal. If you are providing some creative source of mechanical energy be aware that the alternators need a few thousand RPM to put out a meaningful output. See if you can find data on the alternators you intend to use.new guy here, wondering how to get two 12v car alternators to output 24v to hook to my 24v dc inverter.
Any help would be appreciated, and Thanks,
Good idea. Suggest a design that delivers about 50 Amps.If you want each of them to output 24vdc it is simple to make a switching regulator similar to the early ones that replaced the mechanical version, I have done it with a LM311 and a Mosfet.
Even used the same circuit on a 240vdc generator to reg the field.
Hmmmm!You can get 28V out of a 14V alternator by changing the regulator. A 14V 60A alternator will put out ~40A at 24V, but it will take a higher rpm to the shaft.
Watch the internal heating inside the alternator; you may have to force some air through it for cooling.
If you need more current than one alternator can deliver, I would mod both of the them to output 24V and run them in parallel. That avoids having to electrically float the second alternator so that its case could be connected to the 12V output of the first alternator (the case of the alternator is common to the internal rectifier stack)
I did a quick modify of the 240v regulator, being as the original was a generator and not an alternator it pulled itself up by the bootstraps, so you may have to initially use a 12v or 24v supply to get it going, (pull itself up).Good idea. Suggest a design that delivers about 50 Amps.
That worked for an alternator out of a '66 Ford GalaxieA full fielded alternator will put out 120vdc.
Once had a kit that converted standard alternator to run power tools...
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by Luke James
by Jake Hertz