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What is a dynamo motor and how does it work?

2017-02-09

The D.C. Dynamo is basically an application of electromagnetic indication. It works on the principle that movement of a wire in a magnetic field induces current in the coil. in the case of a DC Dynamo, a rectangular coil is made to rotate rapidly in the magnetic field between the poles of the field coils. When this rectangular coil i.e. the armature rotates, it cuts the lines of magnetic force, due to which a current is produced in the field coil. The current can be used to run various electrical appliances.

A Simple dynamo motor consist of a rectangular coil which can be rotated rapidly between the North and South poles of a field coil. The armature coil is made up many turns of an insulated copper wire. The two ends this armature coil are connected to two copper half rings, also known as split rings of a commutator. It also consists of two carbon brushes which pass lightly against these two half rings. When the armature is rotated, these two half rings touch the two carbon brushes, one after another. And so the current produced in the armature is rotated, these two half rings touch the two carbon brushes, one after another. And so the current produced in the armature coil can be tapped out through the commutator half rings and into the carbon brushes.

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