Problems with design, or "KitBot's math seems wrong"

[AllenGregoryIV]

Someone is going to come along and give a much better explanation than I am but I'll start you off.

A couple things to consider
1. Circuit breakers aren't rated for when they trip, instead they are rated for how much current they will allow indefinitely. That means that you can draw 40A from a 40A breaker for forever. Draw more current than the rating and eventually it will trip but it's a matter of time and how much current you are drawing. A short circuit will have them trip immediately. 45A will take longer. You can look up the data sheet for each breaker and find a graph of when they trip.

2. Most drivetrains aren't ever in a stall condition (pulling full current for very long). The kitbot breakers do trigger often if you put a two CIM kitbot into any sort of pushing match where the motors attempt to get near stall current.

This year we ran a 6 CIM single speed drivetrain that was geared for around 14-15fps (in our last three events). At stall each CIM was drawing somewhere around 55A+. Our driver was trained to not stall the robot for too long because it wasn't traction limited and we would blow the main breaker. We tripped the main breaker once at Razorback and browned out the radio once at IRI but other than that we never had issues.