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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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What is the relation of the type of winding with the flux linkage?
in distributed windings, the flux does not link with all the turns
in distributed windings the flux links with all the turns
in concentrated windings the flux links with all the turns
in concentrated windings, the flux does not link with all the turns
in distributed windings, the flux does not link with all the turns
Quick Summary: In a distributed winding, individual coils are placed in multiple slots under a single pole, causing each turn to link with a different portion of the magnetic flux. Consequently, the total flux linkage is the sum of the fluxes linked by individual coils at different spatial positions, which prevents all turns from linking with the peak magnetic flux simultaneously.
In a distributed winding, individual coils are placed in multiple slots under a single pole, causing each turn to link with a different portion of the magnetic flux. Consequently, the total flux linkage is the sum of the fluxes linked by individual coils at different spatial positions, which prevents all turns from linking with the peak magnetic flux simultaneously.
kd=msin(β/2)sin(mβ/2) — Distribution factor where m is slots/pole/phase and β is slot angle
Φtotal=∑Φi — Total flux linkage in distributed system
Due to the spatial distribution of coils in slots, the induced EMFs in different coils are phase-shifted relative to each other. This results in a distribution factor kd<1, which characterizes the reduction in effective voltage compared to a concentrated winding where all coils are in a single slot and link the full flux.
Distributed windings reduce harmonics and produce a more sinusoidal EMF waveform.
Concentrated windings link the maximum possible flux per turn as all turns are in the same slot.
The use of distributed windings significantly improves the performance of AC machines.
Better utilization of armature core
Improved heat dissipation
Reduction in harmonics
Lower induced EMF compared to concentrated winding
Complex manufacturing process
AC Generators (Alternators)
Induction Motors
| Feature | Distributed Winding | Concentrated Winding |
|---|---|---|
Flux Linkage | Partial/Distributed | Total/Max |
In concentrated windings, all turns are grouped in one slot, ensuring they link the same magnetic flux.
Option B is incorrect because distributed windings imply spatial displacement that prevents uniform flux linking.
A is correct — in distributed windings, the spatial displacement of coils results in the flux not linking with all turns equally, leading to a reduced overall induced EMF.
Always remember that distributed windings are used to improve the waveform shape, even at the cost of reduced overall induced voltage magnitude.