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What is the function of Interpole?
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 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 function of Interpole in DC generator?
Interpoles are designed in DC motors to overcome the effects of the armature reactance and the self-induction of the machine. Most shunt and compound DC motors over one-half horsepower have interpoles located 90 electrical degrees from the main poles. Some motor designs use only one interpole with satisfactory results.
What is a commutator and what does it do?
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.
What is the purpose of compensating winding?
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.
Which motor is used in Interpole winding?
An auxiliary set of field poles carrying armature current to reduce the field flux caused by armature reaction in a d-c motor. Interpoles – Are coils that are placed between the field coils that generate a field that is used to prevent excessive sparking of the brushes.
What is difference between commutator and slip rings?
The main difference is that commutator is used for the conversion of AC to DC. Slip rings are used in AC motors to provide a continuous transfer of power whereas the commutators are used in DC motors to reverse the polarity of the current in the armature windings.
What is difference between armature and commutator?
An armature is a combination of the winding, commutator, brushes, and ball bearings….What is Commutator?
| Armature | Commutator |
|---|---|
| It receives current from the armature windings | It receives current from the armature core |
| The core consists of armature windings, commutator, and brushes | It has some segments |
What is Demagnetising effect?
The term demagnetizing field reflects its tendency to act on the magnetization so as to reduce the total magnetic moment. It gives rise to shape anisotropy in ferromagnets with a single magnetic domain and to magnetic domains in larger ferromagnets. (See magnetic hysteresis.)
Why brushes are placed along MNA?
Brushes are always placed along the MNA because reversal of current in the armature conductors takes place along this axis. GNA (Geometrical Neutral Axis) may be defined as the axis which is perpendicular to the stator field axis.
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