General > General Technical Chat

Rewinding a Compound-Wound Generator

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NiHaoMike:
Have you considered rewinding it to 16V and using a 4S R/C lipo pack?

AVGresponding:
How about traction batteries (for forklifts etc)? These are often made up of individual cells, I'd bet they're cheap enough from a scrapyard.

TimNJ:
Is an electronic solution possible? Not sure how this engine works, but i assume it requires a relatively high “cranking current”? Any idea how much?

Rewind to 16V? 24V battery with some chonky TO-3 transistor to drop it to 16-18V or so? e.g. MJ11032G or something.

Xnke:
The problem is that not only are we changing the DC cranking voltage, we are also changing the DC exciter voltage that's used to excite the generator's field. The interaction is the biggest issue with getting the rewinding data correct.

That's also why I'm trying to stick with the 24V or 36V system, both of those voltages were used with this generator system in other models and both voltage choices used this same rotor hardware, so I know that those two voltages can be done and there is factory data on setting the regulator up for them. I'm working on charting out what the differences are in the regulator/controller between the various voltage models. Some of these units were so rare that it's hard to find the factory manuals for them, like the 48VDC units...very uncommon!

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