What is Interpole and where it is?

Definition of interpole : a supplementary pole placed between the regular poles of a direct-current dynamo or motor in order to regulate commutation. — called also commutating pole.

What is the purpose Interpole field?

The field generated by the interpoles produces the same effect as the compensating winding. This field, in effect, cancels the armature reaction for all values of load current by causing a shift in the neutral plane opposite to the shift caused by armature reaction.

What is the function of Interpole and commutator in DC machine?

Interpoles in DC machine has basically two functions: Automatic neutralization of cross magnetization due to armature reaction. To counter and cancel reactance voltage in the coil undergoing commutation.

What is commutation in dc machines?

The commutation in DC machine or more specifically commutation in DC generator is the process in which generated alternating current in the armature winding of a dc machine is converted into direct current after going through the commutator and the stationary brushes. It is called commutation period.

What is an interpole winding?

Interpoles, also known as compensation windings, are extra field poles “in-between” the main field poles, thus “interpoles”. (Not the same as INTERPOL the Intl. police agency.) It does electrically what advancing the brush angle does mechanically, only better.

What is commutation in a motor?

The process of commutation in a synchronous motor is that of switching between the phases. It is possible to switch between the phases in such a way that the winding will alternately attract and repel the permanent magnets to create the desired motion through Lorentz Law.

What is commutation explain?

1 : exchange, trade. 2 : replacement specifically : a substitution of one form of payment or charge for another a commutation by money payment for the exacted service. 3 : a change of a legal penalty or punishment to a lesser one commutation of a death sentence.

What is the function of commutator?

The function of commutator ring in an electric motor is to reverse the direction of current flowing through the coil every time coil just passes the vertical position during a revolution. Hence as the direction of the current is reversed, the torque is changed in the direction.

Where is the commutator on an electric motor?

A commutator itself is a split rotary ring, typically made of copper, with each segment of the ring attached to each end of the armature coil that is used in some types of electric motors and electrical generators whose job is to periodically reverse the current direction between the rotor and the external circuit.

How Interpole are connected in a DC generator?

Inter-poles are similar to the main field poles and located on the yoke between the main field poles. The inter-pole winding is connected in series with the armature winding because the inter-pole must produce flux that is directly proportional to the armature current.

What is the purpose of commutator?

On DC and most AC motors the purpose of the commutator is to insure that the current flowing through the rotor windings is always in the same direction, and the proper coil on the rotor is energized in respect to the field coils.

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