ELECTRICAL AND ELECTRONIC RELATED CALCUATIONS.......ONLT FOR EXPERTS

· Problem 1.4 (p. 34)

· Problem 1.5 (p. 34)

· Problem 17.6 (p. 945)

· Problem 17.8 (p. 945)

· Problem 17.14 (p. 946)

Submission Requirements:

1.4 The peak value of the current waveform through a power device as shown in Figure 1.10d is IP = 100A.If the duty cycle k = 40%and the period T = 1ms, calculate the rms cur- rent IRMS and average current IAVG through the device.

1.5 The current waveform through a power device is shown in Figure 1.10e. If Ia = 80 A, Ib = 100 A, the duty cycle k = 40%, and the period T = 1 ms, calculate the rms current IRMS and average current IAVG through the device.

17.6 An RC snubber circuit, as shown in Figure 17.16c, has C = 1.5 μF, R = 3.5 Ω, and the input voltage is Vs = 220 V. The circuit inductance is L = 20 μH. Determine (a) the peak forward voltage Vp, (b) the initial dv/dt, and (c) the maximum dv/dt.

17.8 An RC snubber circuit, as shown in Figure 17.16c, has circuit inductance of L = 60 μH. The input voltage Vs = 220 V. If it is necessary to limit the peak voltage to 1.5 times the input voltage, and the damping factor, α = 9500, determine (a) the snubber capacitance C, and (b) the snubber resistance R. Assume frequency f = 8 kHz.