School of Physics Lecture Demonstration Manual

Ee-1 The Direct Current Motor

Published: Tuesday 14 March 2006 - Updated: Tuesday 29 March 2011


To demonstrate a working model of a simple D.C. motor.



Click on pictures to enlarge.

Direct Current Motor


The D.C. motor model consists of four electromagnets; the two fixed to the frame representing the field windings and the two free to rotate about the central axis representing the armature windings. 12 Volts D.C. will produce rapid rotation of the armature. It may be necessary to adjust the commutator with respect to the brushes.

Safety notes

Electrical safety 


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