Responding to a request from Ether in
another thread, my lab measured the starting current of a CIM motor supplied directly from a fully charged FRC battery, with the shaft free. The resulting current surge reached about 120 Ampere peak within ~5 milliseconds, and settled to about 3 Ampere average after about 70 milliseconds. See the attachment for test details.
We will also measure CIM motor starting current with the shaft loaded by a dynamometer set for rated torque, and report those results.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
"Friends don't let friends build mecanum" - Michael Corsetto [more] 
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