what is the function of commutator in dc motor?
- 52 Answers
- 166973 Views
- Aviation, HP, Raj Construction, TCE, University Exams, I also Faced
- E-Mail Answers
Answer Posted / b.anil kumar
first of all before going to discuss about the function of
commutator in dc motor we need to know about the parts of
the machine.from the construction point of view dc motor is
same as that of dc generator but the operation is
different.it is a dc machine which can be operated as motor
by providing electrical energy or as a generator by
providing mechanical energy and excitation.we can call the
dc motor as doubly excited dc machine why because we are
providing excitation not only to the field but also to the
armature.But between the armature and the brushes we have a
mediator i.e commutator.if the commutator is stationary dc
is directly applied to the armature because of no induced
emf in the armature winding called beck e.m.f heavy current
will flow cause damage to the armature.if we made to run
the armature by providing low voltage to the armature the
armature will rotate .when the armature rotates the
commutator which is connected to the armature also
rotates,the commutator converts dc into ac to the
armature.so ac applied to the armature and the back emf
will be developed which regualtes the flow of currents
through the armature.this back emf will depends upon the
speed of the armature simply to say that the function of
commutatorin dc motor is to convert dc to ac
| Is This Answer Correct ? | 4 Yes | 5 No |
Post New Answer View All Answers
How Calculet The UPS AH In Load
with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....
how can you calculate fault level ?
why we use 630mm single core cable for transformer secondary side and why two neutral cable
how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?
explain all the classes with example
How Can you do Maintenance of ACB of 2000Amperes
What is the difference between single point and double point bonding. please kindly detail about bonding of cables.
how to measure the current by compact digital equipment with dislay which fit inside any equipment
Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?
trasnfarmaer core make
What types of question are done for diploma students in aptitude test
What is the ratio of true power to apparent power in an ac circuit?
what is subtransient , transient and steady stateac components
what is the advantages og idmt relay over magnetic relay??
