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Post by turbokinetic on Mar 31, 2020 13:33:25 GMT
Again your tests and measurements are informative and enlightening! What the measurements definitely show is the eye opening positive relationship between voltage and torque.
Since the source converter motor used would have had a run winding with a lower winding resistance/turns and a start winding with a higher resistance/turns the transformer effect would have been a +300 voltage induced into the converter motor start winding. The +300 out of phase voltage is thus the voltage applied to the start winding of the CA test motor.
Is it possible that the increased out of phase voltage obtained from that wiring arrangement further proves the positive relationship between voltage and torque? Glad you found it interesting! As for that CA which was un-seized in the original video, it's still working like a top! It's entirely possible that the much higher voltage on the phase-shifted signal from the converter motor start winding was a big factor in the torque increase. I wish I had more scope and metering instruments to apply to a test like this. That would be interesting! Sincerely, David
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