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What is pole core?
A pole core is a word often used in dc machines which provides space for field winding
Can a shunt field winding be used as a series field winding in dc series motor?
aster
What happens if field winding of a running dc shunt motor suddenly breaks open?
when the field winding of a running dc shunt motor suddenly breaks open the motor fails to run because in the motor the stationary winding is armature and rotatory is field winding
Can you use the separately excited shunt generator machine as self excited generator?
You have a seperately excited generator and then you have a shunt generator which has the field winding in parallel with the armature terminals. In DC machines a separately excited generator could be run as a shunt generator provided the field winding is designed to work on the generated voltage. A separately excited alternator needs a DC supply for the field winding. In car alternators that is taken from the main winding via a rectifier and a voltage regulator.
Why the transformer is not working in DC supply?
Transformers operate on the inductance principle; they need a changing magnetic field to induce a voltage into the secondary winding. Either you must supply a changing magnetic field to one winding, or supply that winding with DC and move the core (like in a microphone).
Why is current in field winding of rotating electrical machines always dc?
Because with DC stationary field w.r.t. rotor can be easily created,and permanent pole can be created.
What is pole core?
A pole core is a word often used in dc machines which provides space for field winding
Can a shunt field winding be used as a series field winding in dc series motor?
aster
What happens if field winding of a running dc shunt motor suddenly breaks open?
when the field winding of a running dc shunt motor suddenly breaks open the motor fails to run because in the motor the stationary winding is armature and rotatory is field winding
What are various DC machines?
The various of DC Machine.They are a.)Ammeter b.)Pole c.)Field winding d.)Yoke e.)Brush f.)Commutator g.)D.C supply h.)Shaft
Can you use the separately excited shunt generator machine as self excited generator?
You have a seperately excited generator and then you have a shunt generator which has the field winding in parallel with the armature terminals. In DC machines a separately excited generator could be run as a shunt generator provided the field winding is designed to work on the generated voltage. A separately excited alternator needs a DC supply for the field winding. In car alternators that is taken from the main winding via a rectifier and a voltage regulator.
How many voltage applied in field winding of dc motor?
110
How can the field coils of DC machines be connected with self excited machines?
No
Answering Which one is a separately excited generator - ac generator or dc generator?
Excitation is the phenomenon by which you control the excitation of field winding of a generator. In DC generator field winding is placed on stator and this field winding can be self excited or seperately excited depending upon the type on generator used. AC generators can also be self excited or seperately excited type but field winding is placed on rotor nad armature winding on stator.
Why the transformer is not working in DC supply?
Transformers operate on the inductance principle; they need a changing magnetic field to induce a voltage into the secondary winding. Either you must supply a changing magnetic field to one winding, or supply that winding with DC and move the core (like in a microphone).
Why you have to connect DC supply to the induction motor?
To start an induction motor we have to excite field. The excitation is done by connecting the DC supply to the field winding's.
What is the EMF for DC machines?
Electro Magnetic Field
