Model DC Motor: Torque, EMF, Resistance & Regulation

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SUMMARY

The discussion focuses on modeling a DC motor using key parameters such as torque constant, EMF constant, dynamic resistance, and motor regulation. The user lacks the moment of inertia (MMOI) and electromechanical time constant, which are critical for accurate modeling. Participants confirm that while these parameters are essential, the moment of inertia can be measured through practical methods. Recommendations for measurement techniques are sought to proceed with the modeling.

PREREQUISITES
  • Understanding of DC motor parameters: torque constant, EMF constant, dynamic resistance, and motor regulation.
  • Familiarity with moment of inertia (MMOI) and its significance in motor modeling.
  • Knowledge of electromechanical time constant and its role in motor dynamics.
  • Basic measurement techniques for physical properties of motors.
NEXT STEPS
  • Research methods for measuring moment of inertia (MMOI) in DC motors.
  • Learn about electromechanical time constant and its calculation in motor systems.
  • Explore simulation tools for DC motor modeling, such as MATLAB/Simulink.
  • Investigate practical applications of torque and EMF constants in motor control systems.
USEFUL FOR

Engineers, robotics enthusiasts, and students involved in motor design and control, particularly those interested in DC motor dynamics and modeling techniques.

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Hello, I want to model a DC motor which I bought from a company. I only have the following information:

torque constant [M.N.M./Amp],
EMF constant [MV/RAD/SEC],
Dynamic Resistance [OHMS] and
Motor Regulation [RPM./M.N.M.].

The company does not provide the moment of inertia nor elect/mech time constant. As far as I know, I need all these three pieces of information in order to model the motor. Am I right? Is there a way to do it without the missing information?
 
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You should be able to measure the MMOI if you are willing to make some measurements.
 
Dr.D said:
You should be able to measure the MMOI if you are willing to make some measurements.

Hi Dr.D, which method do you recommend?
 

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