Where are no Equaliser rings connected?

Explanation: The armature coils forming each of the two parallel paths are under the influence of all pole-pairs so that the effect of the magnetic circuit asymmetry is equally present in both the parallel paths resulting in equal parallel-path voltages. Thus, equalizer rings are not needed in a wave winding.

What is equalizer in electrical?

Equalizers, also called harmonic equalizers, are electronic devices used to balance frequency components of electronic signals. Equalizers used in electrical systems, such as battery equalizers or power supply equalizers maintain balanced loads to prevent overcurrent and potential damage to the system.

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.

Why dummy coils are not used in lap winding?

Why dummy coils are not necessary in Lap winding? Because the lap winding is designed for any number of conductors.

What is the effect of armature reaction in DC generator?

The adverse effects of armature reaction: Armature reaction weakens the main flux. In case of a dc generator, weakening of the main flux reduces the generated voltage. Armature reaction distorts the main flux, hence the position of M.N.A. gets shifted (M.N.A. is perpendicular to the flux lines of main field flux).

What is an equalizer used 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.

Why do we use equalizer?

Equalizers are used in recording studios, radio studios and production control rooms, and live sound reinforcement and in instrument amplifiers, such as guitar amplifiers, to correct or adjust the response of microphones, instrument pick-ups, loudspeakers, and hall acoustics.

What is Equalizer ring?

The equalizer rings are low resistance copper conductor which connects those points in the armature winding which have potential difference between them. If there are potential differences between such points, the circulating current flows through equalizer rings rather than brushes.

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.

Why are dummy coils used in dc machines?

The dummy coils are simply to provide mechanical balance for the armature. As they do not connect with commutator bars, they do not affect the electrical characteristics of the winding.

What are equaliser rings in a DC armature?

To overcome this problem, certain points of equal potential in the armature are connected together by equaliser connectors/ rings. Equaliser rings are a kind of short circuiting rings to equalise the emf’s of parallel paths in a DC machine. In a lap wound armature, parallel paths could be many (as many as number of poles).

What is an equalequaliser ring?

Equaliser rings are a kind of short circuiting rings to equalise the emf’s of parallel paths in a DC machine. In a lap wound armature, parallel paths could be many (as many as number of poles). The emf’s of all parallel paths are not exactly equal due to pole-to-pole variation in reluctance and air gap.

What is an equalizer ring in a DC generator?

The brushes relieves from excessive loading by passing circulating current through the equalizing rings. Let us consider 4 – poles, 12 – coils simplex lap winding of DC Generator. One Equalizer ring is connected to coil sides which are two pole pitch a part in this case.

Why equalizer rings are not provided for simplex wave winding?

It is usual to provide equalizer rings at the back of the armature i.e. at the other side of the commutator. Equalizer rings are not require for simplex wave winding even if there is magnetic unbalance. This is due to the fact that coil sides in two parallel paths are distributed under all the poles.