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Originally Posted by Stud Man Dan
Wouldn't these numbers make perfect sense in these instances? how at around 0 it went flat.. and untill that point it was near the bottom, and when it was near full 12v it was at the top? It would be taking the pulse average?
And with it fluctuating, it would confuse the meter?
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At the extremes? Yes. The duty cycle would be 100% or closer and the meter would easilly be able to read the value. His data does indeed show that motor will get full voltage at the extremes.
However, the change from 0 volts to 12 volts is definitely not linear and more exponential. I think most of us have operated under the assumption that the change was linear.
EDIT: If anyone has taken an electronics course, Jim's graph looks very similar to an RC circuit charging and discharging.