DC Generators
Dc machines which are subjected to abrupt changes of load are provided with

Equalisers
Interpole windings
Compensating windings
Copper brushes

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DC Generators
Wave winding is composed of

That even number which is exact multiple of poles + 2
Any odd number of conductors
Any even number of conductors
That even number which is exact multiple of poles

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DC Generators
Lap winding is composed of

That even number which is exact multiple of poles + 2
Any even number of conductors
That even number which is exact multiple of poles
Any odd number of conductors

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