What is the purpose of lap winding?

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 a wave winding?

Definition of wave winding : an armature winding in which the coils are laid in two layers and follow each other on the surface of the armature in the form of waves with the coils being so connected in series that there are only two paths for the flow of current whatever the number of poles in the machine.

Why are they needed on a lap wound machine but not on a wave wound machine?

For obtaining better commutation a lap connected machines requires equalizer ring whereas it is not required in wave connected machines. Since the number of parallel path in lap winding is equal to the number of poles, more carbon brushes and equalizer ring is required. This makes lap connected machine more costly.

What is duplex lap winding?

A winding in which the number of the parallel paths between the brushes is twice the number of poles is called duplex lap winding. Some important points to remember while designing the Lap winding: If, Z = the number of conductors.

Why Equaliser rings are used in 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.

Why are equalizers not used in wave winding?

Being of lower resistance, it prevents problem of commutation in lap wound machines, as lap wound machines are high current machines and wave wound ones are high voltage machines. This is why wave wound ones do not need an equalizer.

What is the purpose of equalizer rings?

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 is the equalizer for?

What Does an Equalizer Do? An equalizer will adjust audio output so that certain frequencies are emphasized over others. Most do this through the use of linear filters.

Which winding is used in welding generator?

lap winding
Welding generator has high current requirement hence lap winding is used in welding generators. The differential compound generator provides a higher voltage at no load to initiate the arc and once the arc is formed i.e. low resistance and it provides a smaller voltage.