VCE Together Year 12 Physics: Fundamentals of the DC Motor

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Fundamentals of the DC Motor

In this lesson on Fundamentals of the DC Motor, which is part of Unit 3 Area of Study 1 for VCE Physics, you will learn how to:

• investigate and analyse theoretically and practically the operation of simple DC motors consisting of one coil, containing a number of loops of wire, which is free to rotate about an axis in a uniform magnetic field and including the use of a split ring commutator.

How do they work?

The following video will go through the main components of a DC Motor, which are:

• Stator
• An armature
• A rotor
• A commutator with brushes.

The production of torque

The formulae we know for torque is:

\tau = Fd sin(\theta)

In a DC motor torque becomes:

\tau = B I h \frac{w/2}
• B is the magnetic field
• I is the current
• H is the height of the wire
• W is the width of the loop

Looking for more resources? Check out more of our VCE Physics resources here!

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