Difference between single layer Winding and Double layer windings

March 29, 2020March 27, 2020 admin

Difference between single winding and Double layer windings is discrive in this article . By this article we will know about what adavantages and disadvantages of single layer and two layer windings. we will discuss about the measure difference between single layer and Double layer windings.

Difference between single layer Winding and Double layer windings

Here some Basic difference between single layer winding and double layer windings. This Difference is in respect of advantages of single layer and double windings.

S. No.	Criteria	Double layer Winding	Single layer Winding
1.	E.M.F.	Better e.m.f. wave form	Worst e.m.f wave form
2.	Harmonics	Harmonics can be reduced or eliminated from the e.g. wave form.	Harmonics can be increased from the e.g. wave form
3.	Copper savings	More savings of the copper material	Less savings of the copper material
4.	Cost of coils	Lower cost of coil	Higher cost of coil
5.	Manufacture of coils	Ease of manufacture of coil	Typical of manufacture of coil
6.	Slotting used	Fractional slotting used, which would be helpful in further improving the e.m.f. wave form	Integral slotting used, which would be not helpful in further improving the e.m.f. wave form
7.	Leakage Reactance	Lower	Higher

It is basic difference between single layer winding and double layer winding in case of advatages.

Single Layer Winding and Double Layer Windings Disadvatages

Single Layer Winding and Double Layer Winding

Now we will know disadadvantages of single layer winding and double layer winding. In this section we know that what is measure disadvangaes in single layer winding and double layer windings.

1.	Repair	Difficult to repair	Easy to repair
2.	Difficulty in insertion of last coil	Lost of difficulty	Lesser difficulty
3.	Noise	Rise because wider slot opening	Decrease because narrow slot opening
4.	Magnetizing current	Increase	Decreases
5.	Power factor	Poorer power factor	Better power factor
6.	Space utilization in slot	Space utilization in slot is poorer	Space utilization in slot is better

These are some differences between single layer and double layer windings in case of Disadvantages.

Single layer winding and Double layer Windings Introduction

AC machines where commontator is not used, it is not necessary to use a closed winding. These machines use open winding. In open windings, the armature may be left open at one or more points. The ends of each section of the winding can be brought out to terminals and then any desired inter-connection can be made externally.

Open winding may be either single layer or double layer type and are used in a.c. machines like induction and synchronous machines.

The main difference between single and double layer windings is in the arrangement of their overhang. In single layer winding, the coils are arranged in groups. Each group has its overhang crossing the overhang of adjacent groups. This is possible only by having individual coil groups of different sizes and shapes. This means that a single layer winding requires a variety of sets of coils with each set differing in both size and shape from the other sets. this is basic difference between single layer winding and double layer windings.

In double-layer winding, all coils are of the same shape and size. Each coil has its one coil-side in top half of one slot and other coil-side in the bottom half of some other slot. The problem of overhang does not exist in double layer winding as it is in single layer winding as it is in single layer winding. S double-layer windings have identical coils, fabrication is easier and this leads to reduction in cost.

Hence these are difference between single layer winding and double layer windings . we have also discussed about the basic introduction of single layer winding and double layer winding. Advatages of single layer and double layer winding also discused in this article. If you will find any error in above article you please comment in comment box.