Table of Contents
Why lap windings are used in large multipolar DC generators?
In multipolar machines, for a given number of poles (P) and armature conductors (Z), a wave winding has a higher terminal voltage than a lap winding because it has more conductors in series. On the other hand, the lap winding carries more current than a wave winding because it has more parallel paths.
What is the use of lap winding?
Lap Winding is a form of two-layer winding for electric machines in which each coil is connected in series with the one adjacent to it. lap winding is used for high current and low voltage machines.
For what type of DC machine lap winding is employed?
Lap wound is basically used for high current and low voltage rating.
What is the purpose of wave winding in DC generator?
Detailed Solution
| Lap Winding | Wave Winding |
|---|---|
| The efficiency of the lap winding is less | The efficiency of the wave winding is high. |
| The lap winding is used for high current, low voltage machines | The applications of wave winding include low current and high voltage machines. |
What is the difference between lap and wave winding?
The main difference between these two is, in the lap winding, One of the major difference between them is that in a lap winding, the last part of every coil is associated with the nearby sector while in the wave winding the last part of armature coil is associated with the commutator sector at a distance apart.
What are the uses of lap and wave windings?
The lap winding is used in low voltage, high current machines, whereas the wave winding is used in high voltage, low current machines.
What is difference between lap and wave winding?
Why are equalizer rings used for lap winding?
In lap winding the numbers of parallel path are equal to the total of number poles and is used in low voltage and high current dc machines. Hence, the function of equalizer rings is to avoid unequal current distribution at the brushes and to reduce sparking between brushes and commutator.
What is retrogressive lap winding?
Retrogressive lap winding If the endpoint of two winding is connected with the same commutator then this type of arrangement is known as retrogressive winding. In simple words, we can explain that if the no of poles in a machine is ‘P’ then P/2 coils are arranged among neighboring commutators.
Why lap winding is used for high current?
The applications of lap winding mainly include low voltage as well as high current machines. These windings are mainly linked for providing numerous parallel lanes for armature current. Due to this reason, this type of winding is used in dc generators, and it requires some pairs of brushes and poles.
What is the purpose of using equalizer rings in lap windings?
Hence, the function of equalizer rings is to avoid unequal current distribution at the brushes and to reduce sparking between brushes and commutator. The equalizer rings are low resistance copper conductor which connects those points in the armature winding which have potential difference between them.
What are the types of lap winding?
The lap winding is mainly used in low voltage, high current machine applications. They are three types 1. Simplex Lap Winding: In simplex lap winding, the terminating end of one coil is joined to the commutator segment and the starting end of the next coil is placed under the same pole.
What are the two types of winding in a DC machine?
There can be two types of winding in a DC machine, one is called the lap winding and another is called the wave winding. Lap winding is the winding in which successive coils overlap each other. It is named “Lap” winding because it doubles or laps back with its succeeding coils.
What is a duplex lap winding?
The duplex lap winding is mainly used for heavy current applications. Such type of winding is obtained by placing the two similar winding on the same armature and connecting the even number commutator bars to one winding and the odd number to the second winding.
What is simplex lap winding?
Simplex Lap Winding: In simplex lap winding, the terminating end of one coil is joined to the commutator segment and the starting end of the next coil is placed under the same pole. Also, the number of parallel paths is similar to the number of poles of the windings. 2.