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
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