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Armature reaction is effect of armature flux on main field flux.
Basically there are two windings in a dc motor - Armature winding (on stator) and field winding (on rotor). When we excite the field winding, it produces a flux which links with the armature. This causes an emf and hence a current in the armature. This current in armature produces another flux which lags the main flux. This is referred to as armature reaction. It has two effects on the machine:
1. Demagnetising effect: It reduces the strength of the main flux.
2. Crossmagnetising effect: Its effect is that it bends/distortes the the main flux line along the conductor
Wiki User
∙ 8y ago
Wiki User
∙ 11y agohow a armature affects the performance of a d.c machine
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What are the effect of armature reaction in DC machine and how the armature reaction is minimise?
Armature reaction is the interaction between the magnetic flux produced by armature current and that of the main magnetic field in an electric motor or generator.
What is a DC shunt motor?
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
Why pole face are chamfered in dc machine?
in order to reduce armature reaction.
What is hunting in a DC motor?
when a dc motor armature current is fluctuated in a range then it is call hunting in a d.c motor.
Armature reaction in a DC generator?
ARMATURE REACTION in DC MachineAll current-carrying conductors produce magnetic fields. The magnetic field produced by current in the armature of a dc generator affects the flux pattern and distorts the main field. This distortion causes a shift in the neutral plane, which affects commutation. This change in the neutral plane and the reaction of the magnetic field is called armature reaction.
What is armature reaction in dc machines?
The armature reaction is the interaction between armature flux and field flux when current is introduced to a dc motor. It results in a cross-magnetizing effect and a demagnetizing effect.
What are the effect of armature reaction in DC machine and how the armature reaction is minimise?
Armature reaction is the interaction between the magnetic flux produced by armature current and that of the main magnetic field in an electric motor or generator.
What is a DC shunt motor?
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
Why pole face are chamfered in dc machine?
in order to reduce armature reaction.
What is a shunted motor?
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
What is hunting in a DC motor?
when a dc motor armature current is fluctuated in a range then it is call hunting in a d.c motor.
The back emf indcuced in the armature is AC or DC?
only in dc motor...
Armature reaction in a DC generator?
ARMATURE REACTION in DC MachineAll current-carrying conductors produce magnetic fields. The magnetic field produced by current in the armature of a dc generator affects the flux pattern and distorts the main field. This distortion causes a shift in the neutral plane, which affects commutation. This change in the neutral plane and the reaction of the magnetic field is called armature reaction.
What is three point dc shunt motor starter?
L , F and A L - Line (connected to Supply) F - Field (connected to field of dc motor) A - Armature (connected to armature of DC motor) that's y it is called 3 point
What is DC shunt motor?
A shunt DC motor connects the armature and field windings in parallel or shunt with a common D.C. power source. This type of motor has good speed regulation even as the load varies, but does not have the starting torque of a series DC motor
What type of dc motor has its field winding in parallel with its armature windings?
Shunt Motor
How is a DC permanent-magnet motor reversed?
Reverse the polarity of armature windings of the motor.
