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Originally Posted by Richard
I have a Magtrol HD-715 dynamometer and Sorenson DCS 20-150 switchmode power supply in my day-job lab. I did a quick 12V test of the large CIM motor this morning. With the motor coupled to the dyno and no load (apart from dyno friction) applied the speed was 2710 RPM and the current was 1.5 Ampere. Peak efficiency was about 85% at 43 oz-in, 2470 RPM drawing 7.7 Ampere. Peak shaft power was about 218 Watts at 193 oz-in, 1530 RPM drawing 33.5 Ampere. The maximum steady load that I applied was 283 oz-in, 750 RPM drawing 51 Ampere. I did take the loading up to about 350 oz-in momentarily without stalling the motor, but did not leave it there long enough to record steady data.
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Richard because your test results vary so drastically from the specs on previous posts on motor wattage, would you mind testing the old cim motors on your dyno so I can make an accurate comparison.