Universal Motors: Basics

A universal motor is a single-phase series motor, which is able to run on either alternating current (ac) or direct current (dc) and the characteristics are similar for both ac and dc. The field windings of a series motors are connected in series with the armature windings.

universal motors

The electrical design areas of a universal motor are the magnetic circuit, the field and armature windings, the commutator and brushes, the insulation and the cooling system.

Commutation Process:

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Performance Characteristics:

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