Quote:
Originally Posted by aire
Eric,
What power supply wattage would be needed to run motors off of?
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For a full robot on the ground? Somewhere in the range of 2-6kW.
For testing subsystems while up on blocks? 1kW might do it.
Quote:
Originally Posted by engunneer
Decide how much power the motor takes. Worst case for a CIM on a 40A fuse is going to be 12V*40A = 480W coming from the power supply. Add up all the motors you want to use to get a worst-case idea.
with a 500W power supply, you can test 1-2 motors at a time under full load. If your wheels are not on the ground, they are not at full load, so maybe you can run 4 motors or so.
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Actually, a CIM can easily draw 100-130 Amps at stall depending on wiring. When a breaker has a 40 Amp rating, it means that it can sustain 40 Amps indefinitely.
EDIT to add:
Regenerative breaking can play havoc with some power supplies. Where a battery would simply accept the regenerated charge, some power supplies will go high-impedence to protect themself. The voltage can spike and destroy the supply or the robot electronics.