Difference between Concentrated and Distributed winding

Generally, Electromagnetic Armature winding makes the magnetic poles. Of course, these winding concentrate as single North and single South poles, said to be “Concentrated winding”. But in the “Distributed winding” configuration, Armature has more than one N and S pole.

Concentrated Winding

According to concentrated winding, the coil turns are concentrated in one place. So no production of the pitch factor or distribution factor for these winding. In addition, these winding have a unity Pitch factor and Distribution factor.

Firstly Consider DC generator Machine.

  • In Concentrated winding, the output voltage has more ripples than the Distributed winding.
  • Hence, terminals of the distributed winding may deliver pure DC (Form factor: FF =1).

Below are some useful details related to the Concentrated winding:

1Coils in series connection.
2Number of polesequal to the number of slots.
3Coil type Multi-turn coil.
4Magnetic axis Same for each turn of the single coil.
5ApplicationTransformer winding, synchronous, and DC machine winding.
Concentrated-winding-of-DC-machine

Distributed Winding

A winding that is spread throughout the periphery of the rotor/ stator having the least air gap is known as Distributed winding. In short, the EMF induced in it is due to the pitch factor or distribution factor. Further, It does not have the same magnetic axis for each coil. So distributed winding induces lesser EMF.

A distributed winding is always better to use as it gives the best output waveform much closer to the sinusoidal waveform.

Below are some useful details related to the Distributed winding:

1Coils along air gap periphery.
2Number of polesNot equal to the number of slots.
3Coil type full pitched or distributed.
4Application Stator and rotor of Induction Machine,
 the armature winding of synchronous.
distributed-winding-of-DC-machine-1

Check more articles related to the DC machine:

Construction of DC machinelenz’s law
faraday’s lawActive & Passive Elements

An electrical machine uses many types of winding. Here Concentrated winding and Distributed winding are elaborated below.

Difference between Concentrated and Distributed winding

S.No.Distributed windingConcentrated winding
1If coils of the winding of a single pole are distributed throughout the space is called Distributed winding.If the Coils of the winding of a single pole are concentrated on one axis is called Concentrated winding.
2Practically, this type of winding is used in armature winding of the Induction machine, Synchronous machine, and DC machine.But this type of winding is used in Transformers, Electromagnets, solenoids, etc.
3Generally in Distributed winding number of poles is not equal to the number of slots.But in Concentrated winding number of poles is equal to the number of slots

Advantages of Distributed over the concentrated winding

  1. As a result, the shape of the Induced EMF improves. (It is the most essential advantage).
  2. In addition, it Provides efficient cooling.
  3. But it has a Dynamic balance.
  4. Inductive reactance is lesser (because L is proportional to N2 ).
  5. After all, the armature reaction is more dominant.

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