my initial testing
Hi everyone,
I have somewhat resolved my torque measurement issue involving my small digital scale (sample rate issues).
I am posting here my first (mostly) complete data:
The torque data comes from a small digital scale (-+ 0.2g)
The current comes form a shunt = 5.1 ohms. No correction was made for the power dissipated by the shunt, so there's some more to add to the output efficiency.
Load: 2 grams @ 2.33 inch torque arm
Voltage: Pulse 16VDC
Current: approx 75% of 0.196A Peak = 0.147Aavg
(see picture - classic R-L inductor charge curve)
Pulse Duty Cycle: approx 13%
Motor Speed: 1001RPM
Results:
Input Power: 0.30576 Watts
Output Horsepower: 0.000163022 H.P.
Output Equivalent: 0.124615 Watts
Efficiency: about 40% (without shunt power figured in)
I think this is all right but any input is appreciated.
Thanks,
Greg
Ch2 is the 5.1 ohm current shunt
Hi everyone,
I have somewhat resolved my torque measurement issue involving my small digital scale (sample rate issues).
I am posting here my first (mostly) complete data:
The torque data comes from a small digital scale (-+ 0.2g)
The current comes form a shunt = 5.1 ohms. No correction was made for the power dissipated by the shunt, so there's some more to add to the output efficiency.
Load: 2 grams @ 2.33 inch torque arm
Voltage: Pulse 16VDC
Current: approx 75% of 0.196A Peak = 0.147Aavg
(see picture - classic R-L inductor charge curve)
Pulse Duty Cycle: approx 13%
Motor Speed: 1001RPM
Results:
Input Power: 0.30576 Watts
Output Horsepower: 0.000163022 H.P.
Output Equivalent: 0.124615 Watts
Efficiency: about 40% (without shunt power figured in)
I think this is all right but any input is appreciated.
Thanks,
Greg
Ch2 is the 5.1 ohm current shunt
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