Table of Contents
What is a commutator and armature?
An armature is an essential component in a DC machine. A commutator is a rotating electrical switch. It gets the flow of current from the windings of an armature. It gets the flow of current from the core of an armature. The core of an armature includes armature windings, brushes & a commutator.
What is the 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.
What is the role of a commutator and armature in a motor?
The physical connection to the armature winding is made through a commutator-brush arrangement. The function of a commutator in a dc generator is to collect the current generated in armature conductors. While in the case of a dc motor, the commutator helps in providing current to the armature conductors.
What is a commutator in DC machine Mcq?
Commutator is used as mechanical rectifier in DC machines. It converts AC armature current in to DC current.
Is commutator and armature the same?
An armature is a combination of the winding, commutator, brushes, and ball bearings….What is Commutator?
| Armature | Commutator |
|---|---|
| It gives current from the armature core to commutator | It converts the alternating power to direct power and vice-versa |
What are the parts of armature?
Armature Components. An armature can be designed with the number of components namely the core, the winding, the commutator, & the shaft.
What is armature and field?
The armature is the winding to which the load is connected. In small generators, the field windings are often on the stator, and the armature windings are on the rotor. A synchronous motor is virtually identical to a synchronous generator. Thus, the armature is the stator and the field is the rotor.
What is an armature and its components?
In electrical engineering, the armature is the winding (or set of windings) of an electric machine which carries alternating current. The armature can be on either the rotor (rotating part) or the stator (stationary part), depending on the type of electric machine.
What is commutator in motor?
A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. In a motor the commutator applies electric current to the windings.
What is the function of armature?
Armature – It is a rectangular coil that is placed in a uniform magnetic field. The main function of the armature is to rotate the shaft or axel to which it is attached. Brushes – They are attached (not fixed) to the split rings.
What is the construction of a commutator?
1 Construction of a Commutator. A commutator is built with a set of contact bars and is set into the revolving shaft of a DC machine allied to the armature winding. 2 Commutation in DC Machines. In a DC machine, each armature coil contains two commutators attached to its end. 3 Slip Rings and Commutators.
What is the armature of a DC motor?
DC Armature The armature of an electric machine is the name historically given to the winding where a voltage is induced and power transfer between electrical and mechanical systems occurs. It is a term used in dc machines and ac synchronous machines. In a dc machine, the armature is the rotating circuit.
What is an armature coil in a DC machine?
In a DC machine, each armature coil contains two commutators attached to its end. The commutator segments and brushes should maintain a continuous moving contact for the better transformation of the current. More than one coil is used in DC machines to avail larger output values.
What is the pole pitch of a DC machine?
For example, if there are 96 slots on the armature periphery and 4 poles, the number of armature slots that come between two adjacent pole centers would be 96/4 = 24. Hence, the pole pitch of that DC machine would be 24.