Polyphase coil
Polyphase coils are
Coil construction
Like all coils used in electrical machinery, polyphase coils (made from insulated conducting wire) are wound around ferromagnetic armatures with radial projections and maximum core-surface exposure to the magnetic field.
The windings are physically separated around the circumference of an electrical machine. The result of such an arrangement is a
Polyphase motors and generators
Compared to single-phase motors and generators, polyphase motors are simpler, because they do not require external circuitry (using capacitors and inductors) to produce a starting torque. Polyphase machines can deliver constant power over each period of the alternating current, eliminating the pulsations found in a single-phase machine as the current passes through zero amplitude.
History
The use of polyphase coils in electrical power systems was pioneered by the engineers
See also