Electrical Engineering ⇒ Topic : Calculation of Hysteresis Loss
Calculation of Hysteresis Loss
We will now show that area of hysteresis loop represents the energy loss/m3/cycle.
Let l = length of the iron bar
A = area of X-section of bar
N = No. of turns of wire of solenoid
Suppose at any instant the current in the solenoid is i. Then,
Suppose the current increases by di in a small time dt. This will cause the flux density to increase by dB [See Fig.(a)] and hence an increase in flux d (= AdB). This causes an e.m.f. e to be induced in the solenoid.
By Lenz's law, this e.m.f. opposes the current i so that energy dW is spent in overcoming this opposing e.m.f.
!! OOPS Login [Click here] is required for more results / answer