In this video, you will learn about Eddy current and its losses and derive the expression for the same. Department: Electrical Engineering Subject: DC Machines and Transformer Year: 2
The iron loss of a transformer at 400 Hz is 10 W. Assuming that eddy current and hysteresis losses vary as the square of flux density, the iron loss of the transformer at rated voltage but at 50 Hz would be....... watt. (a) 80 (b) 640 (c) 1.25 (d) 100 How to solve it?
as the crossectional area for the resistor is incresed resistance decreases and therefore the power losses should be reduced? Why did you say it was the opposite?
For your clarity, in rotating electrical machines, eddy current flows in the whole surface or maximum cross-sectional area of the rotor core. If cross-sectional area of the rotor is maximum, the resistance offered by the rotor is minimum and the induced eddy currents will be maximum. Due to this, the eddy current losses will be maximum. It is obvious that if the cross-sectional area of the eddy current path is reduced; the eddy current losses will also be less. This is explained in this video.
![Eddy Currents and Eddy Current Losses [Year - 2]](/img/logo.svg){kind=logo}
