DC Motor Transfer Function Worksheet
Document and analyze the transfer function of a DC motor. Please complete all relevant sections carefully.
Your Full Name
*
First Name
Last Name
Email Address
*
example@example.com
Motor Type
*
Please Select
Brushed DC Motor
Brushless DC Motor
Coreless DC Motor
Other
Enter the following DC motor parameters:
*
Rows
Parameter Value
Unit
Armature Resistance (Ra)
Ohm (Ω)
Henry (H)
Newton-meter/Amp (Nm/A)
Volt (V)
Ampere (A)
Other
Armature Inductance (La)
Ohm (Ω)
Henry (H)
Newton-meter/Amp (Nm/A)
Volt (V)
Ampere (A)
Other
Back EMF Constant (Kb)
Ohm (Ω)
Henry (H)
Newton-meter/Amp (Nm/A)
Volt (V)
Ampere (A)
Other
Torque Constant (Kt)
Ohm (Ω)
Henry (H)
Newton-meter/Amp (Nm/A)
Volt (V)
Ampere (A)
Other
Rotor Inertia (J)
Ohm (Ω)
Henry (H)
Newton-meter/Amp (Nm/A)
Volt (V)
Ampere (A)
Other
Viscous Friction Coefficient (B)
Ohm (Ω)
Henry (H)
Newton-meter/Amp (Nm/A)
Volt (V)
Ampere (A)
Other
Input Voltage Value (V)
*
Load Torque (if applicable)
Step 1: Write the differential equations representing the DC motor system.
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Step 2: Show the Laplace transforms of the equations.
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Step 3: Derive the transfer function (output/input) for the DC motor.
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How confident are you in your transfer function derivation?
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1
2
3
4
5
Which aspect of the transfer function derivation did you find most challenging?
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Formulating differential equations
Laplace transformation
Algebraic manipulation
Parameter substitution
Other
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