TylerLab5 - Date: To: From: Subject: Introduction: November...

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Date: November 13, 2007 To: Tyler Mentel From: Jeff Scott Subject: Measuring the dynamic characteristics of a DC permanent magnet motor Introduction: DC permanent magnet motors (DCPMM) are widely used for the control of engineering systems. A dynamometer is necessary for the measurement of the shaft’s force and motion. The dynamometer allows the torque of the shaft to be varied by a MR brake which controls the amount of breaking by the amount of current supplied to the break. A load cell is used to measure the force transmitted and a photo – diode tachometer detects the motor speed as a function of its frequency and is outputted on the oscilloscope. Procedure: A weight is applied to the arm and the calibration torque is directly indicated by adjustments to the fine and coarse knobs. The holes in the wheel are then counted and recorded. The motor is then set to the speed 10. The voltage is then slowly increased until the torque is equal to 5 in-lbf. The exact torque and frequency are then recorded. The torque is then increase by 5 in-lbf until we reach 40 in-lbf by increasing the voltage
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This note was uploaded on 01/12/2011 for the course MAE 3800 taught by Professor Feng during the Spring '10 term at Missouri (Mizzou).

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TylerLab5 - Date: To: From: Subject: Introduction: November...

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