can u explain me the way to know the relation between the
active as well as the reactive power acting on an electical
machine under the under excitation as well as over excitation
mode
- 1 Answers
- 2572 Views
- Siemens, I also Faced
- E-Mail Answers
Answer Posted / Manoj Kumar Saini
In electrical machines, both active (real) and reactive powers are involved. Active power (P) is responsible for doing useful work, while reactive power (Q) creates a magnetic field necessary for operation but does not perform any mechanical work.
To determine the relationship between active and reactive power under different excitation modes, you can use Power Triangle:
- Underexcitation: As the machine operates below its synchronous speed, the stator current lags behind the voltage (lagging power factor). Here, Q > 0 and P < V*I (cos φ < 1), where V is voltage, I is current, and φ is phase angle.
- Overexcitation: The machine operates above its synchronous speed, and the stator current leads the voltage (leading power factor). Here, Q < 0 and P > V*I (cos φ > 1).
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Can some1 please mail me the question papers of iiit hyderabad...my mail id is cenablogspot@gmail.com
sir can you send me previous question paper of jsplGET entrance test
Can some1 please mail me the question papers of iiit hyderabad...my mail id is cenablogspot@gmail.com
Sir Pl Provide the diploma nautical science sample paper
could u send me the model papers for drug inspector exam at imrupinder@gmail.com
please i need nautical science past question and answer
plz send me bhel paper....
can i have the model papers for gate along with answers on my email id krish231191@gmail.com please???
