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Evaluating DC Motors

Evaluating DC Motors. Determining Motor Stall Torque and No Load RPM. The Test Bench Set Up. Requirements. Securely fasten motor to the Test Bench. Use #10 AWG or larger, Multi Stranded Wire. Battery or Batteries similar to those intended for use in the BattleBot.

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Evaluating DC Motors

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  1. Evaluating DC Motors Determining Motor Stall Torque and No Load RPM

  2. The Test Bench Set Up Requirements Securely fasten motor to the Test Bench. Use #10 AWG or larger, Multi Stranded Wire. Battery or Batteries similar to those intended for use in the BattleBot. HD Automotive Starter Switch Caution: Testing motor torque creates strong electrical and mechanical forces. Wear Eye Protection. Work with Adult supervision.

  3. Special Equipment Build a motor torque arm Use 1”x1”x1/16” steel angle 3/8” Shaft Collar

  4. Create the Stall Condition Wear Eye Protection 3 People should perform the test. Set up and hold the scale Mark the scale Energize/de-energize the system.

  5. Set Up and Hold the Scale Wear Eye Protection Scale with Taped Marking Torque Arm Retainer Motor Torque Arm

  6. Create the Stall Condition Wear Eye Protection Procedure Assume the stations; Energizer Scale holder Scale marker Energize the System Raise the Torque Arm with the Scale Mark the Scale Deflection De-Energize. ALWAYS Record, Describe and Date the Data

  7. Determining the Torque Value F = Force (lbs.) 3 lbs D = Length (ft.) .5 ft Q = Torque (ft.lbs.) F D Q = D x F 1.5 ft.lbs. = .5 ft. x 3 lbs. ALWAYS Record, Describe and Date the Data

  8. Measure No Load RPM Wear Eye Protection Procedure Mark Armature Shaft with Reflective Tape. Energize the System Read the No Load RPM De-Energize. ALWAYS Record, Describe and Date the Data

  9. Directly Measuring Motor Stall Torque is a Learning Experience. 12V Battery Voltmeter Sample Motor Ammeter NC MO Switch

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