Question

In the figure shown below
$I_{CS}=80A,V_{CC}=220V,t_{on}=1.5\mu sand{t}_{off}=4\mu s.$
For the switching wave forms shown in figure, average power loss in the power transistor for a switching frequency of 2 kHz is __________W.

Answer 1

Average power loss in the power transistor for a switching frequency of 2 kHz is given as:
$=\frac{V_{cc}{I}_{cs}}{6}f.t_{on}+\frac{V_{cc}{I}_{cs}}{6}f.t_{off}$
$=(\frac{220\times 80}{6}\times 2\times {10}^3\times 1.5\times {10}^{-6}+\frac{220\times 80}{6}\times 2\times {10}^3\times 4\times {10}^{-6})$
$=8.8+23.46=32.26W$