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| current limiting 12v charging circuit |
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| tatersalad:
I wasn't sure what the best approach was, hints why I reached out here and asked. im by far no super hero when it comes to stuff but I can normally work through it and make something work. I thought about regulating charge voltage to regulate the amperage but wasn't sure if I really wanted to start another project and risk damaging a brand new alternator. I will be looking into the premade regulators. thanks for all of your feed back on this. For anyone who is wondering... im converting a school bus into an rv, I was given 36 12v batteries that are 2 years old and have had a very nice life in a battery back up unit at my work. they will be mounted underneath the bus in a battery rack to power stuff while boondocking. brushless alternators with higher amperage are on the list but other stuff needs attention first as the conversion isn't complete yet. |
| floobydust:
The 22SI is the old Motorola linear voltage regulator, I think it was discrete transistors then the MC3325 IC inside, then CS3341. I looked at more modern alternator regulators and none of them look at output current. Some use nearby rectifier temperature to see if things are too hot, or knowing RPM and field current they model the output current. The industry has gone to LIN serial bus so the ECU can communicate to the alternator. They all use low frequency 50-400Hz PWM to excite the field winding. OP could use a hall-effect DC current transducer and a circuit or MCU to control the alternator or make a custom regulator, but these are a lot of work. I think I would just add some small resistance to limit current. NXP TC80310 Alternator regulator with LIN (but die only). MC33099 |
| tatersalad:
perfect thank you for the information ill post back with my findings when the rain dries up a bit and im able to work on it |
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