Thoughts on converting an old tractor to electric.
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Right now, I'm thinking the best approach for the tractor is to use a 72V system. That would provide fairly good power on a Brushless DC motor. That with the proper motor controller will also provide regenerative braking, excellent speed control, and some other nice features.

Hydraulics are run from a separate brushed DC pump motor. That would be run from the same battery pack, but probably through a controller, so that the appropriate voltage/speed/current could be set. It should also be much more powerful than the original pump on the end of the gas engine. Here's the video on that:    • EV Tractor | Converting Hydraulics to...  

I laser-cut some cardboard as a test fit to the transmission. Unfortunately, I originally did that photographically, and the accuracy was a little bit off. I worked to create some proper measurements for the adapter plate and I hope to cut the Version 2 test sometime soon. Assuming it's a perfect match, I'll send a file out to get the 1/4" steel cut.

I also found a 3D file of an electric motor that was a very close match to the one I plan to use. I 3D-Printed it out, so I now have a 100% scale mock electric motor.

Motenergy Brushless DC Motors: http://www.motenergy.com/brdcmo2.html
RoboteQ Motor Controller: https://www.roboteq.com/products/prod...
3D Prints are made on my Ender 3 S1 Printer: https://amzn.to/3La0Sig


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