-
The developed electromagnetic force and/or torque in electro-mechanical energy conversion systems act in a direction that tends to
-
- increase stored energy at constant m.m.f.
- decrease stored energy at constant flux
- decrease co-energy at constant m.m.f
- decrease stored energy at constant m.m.f.
Correct Option: B
In the eletro-mechanical energy conversion system,
Mechanical energy output = electrical energy input – increase in stored energy
∴ Fƒdx = i dλ − dWƒ
where, Fƒ = torque developed
λ = flux linkages
Wƒ = stored energy
If flux is constant, then
dλ = 0
∴ Fƒdx = – dWƒ
| ⇒ Fƒ = − | |
| dx |
From the above relation, torque developed will be in opposite direction of stored energy,
