Problem 4) Consider a separately-excited DC motor with the following parameters: Trated = 10 N-m Nrated = 3700 RPM Kt = 0.5 n-m/A (motor Torque Constant) Kb = 53V/1000RPM (Back-EMF Constant) Ra = 0.37 ohm La = 0.15 mH a) Calculate (by hand) the terminal voltage required to deliver a steady-state torque of 5 N- m at a speed of 1500 rpm. b) Model the motor described above in Simulink with motor inertia, J=0.15, and bearing friction coefficient B=0.05. Apply a step change in armature voltage at t=1sec from 0- 85V. Provide plots (with white backgrounds and axis labels) of armature current and rotor speed in RPM. Run the model until a steady-state is achieved.

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Problem 4) Consider a separately-excited DC motor with the following parameters:
Trated = 10 N-m
Nrated = 3700 RPM
Kt = 0.5 n-m/A (motor Torque Constant)
Kb = 53V/1000RPM (Back-EMF Constant)
Ra = 0.37 ohm
La = 0.15 mH
a) Calculate (by hand) the terminal voltage required to deliver a steady-state torque of 5 N-
m at a speed of 1500 rpm.
b) Model the motor described above in Simulink with motor inertia, J=0.15, and bearing
friction coefficient B=0.05. Apply a step change in armature voltage at t=1sec from 0-
85V. Provide plots (with white backgrounds and axis labels) of armature current and
rotor speed in RPM. Run the model until a steady-state is achieved.
Transcribed Image Text:Problem 4) Consider a separately-excited DC motor with the following parameters: Trated = 10 N-m Nrated = 3700 RPM Kt = 0.5 n-m/A (motor Torque Constant) Kb = 53V/1000RPM (Back-EMF Constant) Ra = 0.37 ohm La = 0.15 mH a) Calculate (by hand) the terminal voltage required to deliver a steady-state torque of 5 N- m at a speed of 1500 rpm. b) Model the motor described above in Simulink with motor inertia, J=0.15, and bearing friction coefficient B=0.05. Apply a step change in armature voltage at t=1sec from 0- 85V. Provide plots (with white backgrounds and axis labels) of armature current and rotor speed in RPM. Run the model until a steady-state is achieved.
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