Design & Operation of a DC electric Motor
...electromagnet. An electromagnet is something that is not normally magnetic, but as electricity flows through, it becomes magnetic. · The permanent magnets are placed close to the armature on opposite sides. The North Pole of one magnet facing the South Pole of the other so as to attracts. (diag1) · The combination of the electro-magnet and permanent magnets create the magnetic field. This field passes from the North Pole of one magnet to the south of the other in a complete circuit. · When the electricity flows through, attraction and repulsion occur between the magnet and electro-magnet, resulting in the rotation of the armature. · Having a source of power is also important. Electricity flows through conductors but not insulators. A conductor is usually metal, for example a wire, to prevent electricity escaping it is covered with an insulator. · Using a battery for power, the wire connects the positive and negative end of the battery to different brushes. The electricity flows from the battery to...