Electrical Engineering (EE) Exam > Electrical Engineering (EE) Videos > Electrical Machines > Armature Reaction
Armature Reaction Video Lecture | Electrical Machines - Electrical Engineering (EE)
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19 videos|93 docs|25 tests
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FAQs on Armature Reaction Video Lecture - Electrical Machines - Electrical Engineering (EE)
| 1. What is armature reaction in electrical engineering? |  |
Ans. Armature reaction in electrical engineering refers to the magnetic field produced by the armature current in a DC machine, which interacts with the main magnetic field of the machine. This interaction can cause distortions in the main magnetic field, affecting the machine's performance.
| 2. How does armature reaction affect the performance of a DC machine? | |
Ans. Armature reaction can cause several effects on the performance of a DC machine, such as sparking at the brushes, commutation issues, and changes in the machine's speed regulation. It can also lead to the demagnetization of the pole shoes, affecting the machine's efficiency.
| 3. What are the methods to reduce armature reaction in a DC machine? | |
Ans. Some common methods to reduce armature reaction in a DC machine include interpoles, compensating windings, and pole-face windings. These techniques help to counteract the effects of armature reaction and improve the overall performance of the machine.
| 4. What is the difference between armature reaction in a DC machine and synchronous machine? | |
Ans. In a DC machine, armature reaction is caused by the armature current, while in a synchronous machine, it is caused by the field current. Additionally, in a synchronous machine, the effects of armature reaction are more pronounced due to the nature of the machine's operation.
| 5. How can armature reaction be compensated for in a DC machine? | |
Ans. Armature reaction can be compensated for in a DC machine by using compensating windings or interpoles. These additional windings or poles help to counteract the effects of armature reaction, ensuring smooth operation and improved performance of the machine.
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