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Originally Posted by asid61
Hm, that's correct. How would you explain it then? 6 cims definitely increase acceleration.
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At a given voltage and speed, 6 CIMs draw more current than 4. More current means more torque. More torque means more acceleration.
As the speed approaches motor free speed (for the given voltage), current draw approaches zero no matter how many motors you have (due to back emf).
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However, I stand by by statement that torque is limited by the breaker
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With 6 CIMs you also have 6 40-amp breakers, so the associated total current limit increases. And the main breaker is slow acting - it can sustain high overcurents for a significant duration.