Monday, December 17, 2012

Electrical :: Experiment - Peak Draw on HS Motor

Task: Measure draw (amps) through a motor without load (free current), when instantly stopped (peak current), and stall current (when shaft held).

Purpose: Determine why circuit breaker trips when lifting arm and hitting underneath trough. Robot is uncontrollable for 6-10 seconds.

Procedure:
*Create circuit with 2-wire motor using cortex as power supply
*Measure amps with meter when spinning under no load (Free Current)
*Stop motor shaft attached to sprocket with hand, measure (Peak Current)
*Wait for reading to stabilize, measure (Stall Current)




















Data:

Motor 393
Measurement :: Trial 1 :: Trial 2 :: Trial 3 :: Trial 4
Free Current :: 0.25A :: 0.25A :: 0.25A :: 0.24A
Peak Current :: 5.61A :: 5.67A :: 5.49A :: 5.59A
Stall Current :: 0.29A :: 0.27A :: 0.28A :: 0.28A

Motor 269
Measurement :: Trial 1 :: Trial 2 :: Trial 3 :: Trial 4
Free Current :: 0.26A :: 0.27A :: 0.25A :: 0.26A
Peak Current :: 4.28A :: 4.02A :: 3.71A :: 4.60A
Stall Current :: 0.56A :: 0.57A :: 0.56A :: 0.57A

Conclusions
**Under Construction**

Future Work
Test 393 Speed Mode
Incorporate data into smart motor programming to prevent tripping circuit breaker



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