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Re: Best way to cool CIM motors?
Keep them cool by not running them. It may sound a bit snarky, but in this case it sounds like you're basically spending a lot of time with the motors stalled (i.e. putting power into the motor, but getting no motion out). That's a good way to both heat up your motors and run down your battery fast.
I'd suggest looking for alternate solutions to the gearbox. Many worm-gear drives are not back-driveable. You may instead be able to add some sort of break system. Look for solutions that allow you to hold the totes off the ground without running motors to do so. Many teams use window, van door, or snow blower motors to drive winches. They aren't as fast or as powerful as CIMs, but they also aren't back-driveable (thanks to the attached wormdrive gearbox).
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