What is the role of Interpoles in DC machine?

What is the role of Interpoles in DC machine?

Interpoles are designed in DC motors to overcome the effects of the armature reactance and the self-induction of the machine. Interpoles are wired in series with the armature. Any changes in the armature current due to armature reactance, loading, or self-inductance pass through the interpole windings.

What is the function of commutator in DC machine?

The commutator on the DC generator converts the AC into pulsating DC. The commutator assures that the current from the generator always flows in one direction. The brushes ride on the commutator and make good electrical connections between the generator and the load.

How Interpol are connected in DC generator?

In DC machines, interpoles, also known as compoles, are fixed in space between the main poles. They are connected in series with the armature so as they carry full armature current.

What is the function of commutator in DC motor Mcq?

Commutator is used as mechanical rectifier in DC machines. It converts AC armature current in to DC current. Commutator is used to convert AC current into DC current.

What is the function of a commutator in an electric motor Class 10?

Answer: The function of commutator or slip ring is to change the direction of current through the coil after every half rotation.

What polarity do Interpoles take in a DC generator?

Interpoles are narrow poles placed at the GNA and fitted to the Yoke and also known as Commutating Poles or Compoles. For generator, the polarity of Interpoles must be same as that of main Pole ahead of it in the direction of rotation. For Motor, the polarity of Interpole must be same as that of Main Pole behind it.

What is the need of Interpoles in DC generators where is it located in DC machine *?

Interpoles are used in DC Machines to reduce the effect of armature reaction and self induction, mainly in winding at commutators,of DC motors. Interpoles are connected in series with armature winding so that as the armature current changes the flux due to interpoles chances accordingly.

How are the Interpoles excited?

Explanation: In voltage commutation method we use interpoles to speed up the commutation process. For neutralization of reactance voltage at all loads, the interpoles must be excited by armature current by connecting them in series with armature.

Why compensating windings are used in DC machine?

A compensation winding in a DC shunt motor is a winding in the field pole face plate that carries armature current to reduce stator field distortion. Its purpose is to reduce brush arcing and erosion in DC motors that are operated with weak fields, variable heavy loads or reversing operation such as steel-mill motors.

What are Compensating windings and interpoles in DC machines?

Compensating Windings and Interpoles are one of the important step taken to minimize the undesirable effect of armature reaction in dc machines. Armature reaction causes many undesirable effects on a DC machine such as sparking on brushes.

What is the function of interpoles in DC motor?

In a dc motor, interpoles are connected in series with the armature winding. Their purpose is to counter balance the armature reaction due to flow of current in armature winding.

What is the use of interpose in DC machines?

Interposes are used in DC Machines to reduce the effect of armature reaction and self induction, mainly in winding at commutators,of DC motors. Interpoles are connected in series with armature winding so that as the armature current changes the flux due to interpoles chances accordingly.

What is the main purpose of interpole winding in a coil?

Main purpose of interpoles is to improve commutation by reducing the armature reaction. interpole winding is connected in series with armature winding through brushes to neutralize the armature flux in the interpolar region. It produces a counter flux on the coil undergoing commutation to nullify the reactance voltage.