refer to specification sheet for the Johnson HC68G PMDC motor. Plot the Speed (y-axis) vs Toque (x-axis) curve for the rated voltage.Calculate Ra, Ke, and Kr in SI units.The motor is driving a load that remains at 60 milli Nm independent of speed. Calculate the voltage required to drive the load at 20,000 pm in steady state.In a detailed motor test, the torque constant measures 5% below the calculated value. Explain this deficiency and suggest a method to remedy the problem. HC685G-302Characteristics:High torque DC motorSpecifications:DimensionsShaft DiameterInput VoltageNo Load SpeedNo Load CurrentNominal SpeedNominal TorqueNominal CurrentStall TorqueStall CurrentMaximum Output PowerMaximum EfficiencyTorque at Maximum EfficiencySpeed at Maximum EfficiencyLife (Typical)WeightOperating Temperature RangeStorage Temperature RangeElectrical ConnectionPerformance Data:Current (A)Efficiency (%)Output Power (W)Speed (rpm)Torque (mNm)No Load1.0926700Application Examples:Hand-held Vacuum Cleaners:Ø 35.8 X 50.0 mm: Ø 3.175 mm: 18.0 V DC: 26700 rpm: 1.09 A: 20500 rpm: 67.70 mNm: 12.40 A: 367.80 mNm: 55.00 A: 242.00 W: 63%: 67.70 mNm: 20500 rpm: 100 hr: 150 g: -10 to 55 °C: -20 to 80 °C: TerminalsStall Maximum Efficiency55.00367.8012.4063145.402050067.70Maximum Power28.9646242.0012500183.90Low Voltage DC Motors

For a Johnson HC685G-302 motor, we need to answer the following questions:plot the speed vs torque…

refer to specification sheet for the Johnson HC68G PMDC motor. Plot the Speed (y-axis) vs Toque (x-axis) curve for the rated voltage. Calculate Ra, Ke, and Kr in SI units. The motor is driving a load that remains at 60 milli Nm independent of speed. Calculate the voltage required to drive the load at 20,000 pm in steady state. In a detailed motor test, the torque constant measures 5% below the calculated value. Explain this deficiency and suggest a method to remedy the problem.

refer to specification sheet for the Johnson HC68G PMDC motor. Plot the Speed (y-axis) vs Toque (x-axis) curve for the rated voltage. Calculate Ra, Ke, and Kr in SI units. The motor is driving a load that remains at 60 milli Nm independent of speed. Calculate the voltage required to drive the load at 20,000 pm in steady state. In a detailed motor test, the torque constant measures 5% below the calculated value. Explain this deficiency and suggest a method to remedy the problem.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.47P

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