Switching

The equivalent circuit of a power diode during on-state (ideal in blocking and switching) is shown in the figure below. The power loss in the diode is $95\,$W for each of the two (periodic) current waveforms shown in the figure. What are the values of $V_t$ and $R_d$?
In [1]:
from IPython.display import Image
Image(filename =r'switching_4_fig_1.png', width=500)
Out[1]:
No description has been provided for this image
In [2]:
import numpy as np
import gseim_calc as calc

I01 = 100.0
I02 = 75.0
D1 = 0.5
D2 = 0.75
T = 10e-3
Rd = 5.0e-3 # to be changed by user
Vt = 0.6 # to be changed by user

n_div = 2000
t = np.linspace(0.0, T, (n_div+1))

D1T = D1*T
D2T = D2*T

I1 = np.where(t < D1T, I01, 0.0)
I2 = np.where(t < D2T, I02, 0.0)

P1Rd  = I1*I1*Rd
P1Vt  = I1*Vt
P1    = P1Rd + P1Vt
P1avg = np.trapz(P1, t)/T

P2Rd  = I2*I2*Rd
P2Vt  = I2*Vt
P2    = P2Rd + P2Vt
P2avg = np.trapz(P2, t)/T

print('P1avg:', "%11.4E"%P1avg, 'W')
print('P2avg:', "%11.4E"%P2avg, 'W')

P1avg:  5.4973E+01 W
P2avg:  5.4825E+01 W

This notebook was contributed by Prof. Nakul Narayanan K, Govt. Engineering College, Thrissur. He may be contacted at nakul@gectcr.ac.in.

In [ ]: