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Figure 1 shows a circuit for energizing inductor L and removing the stored energy without damaging transistor Q. In this circuit, Vcc = 20 V, L = 50 mH, and the breakdown voltage of zener Z is Vz= 30 V. The transistor opens and closes periodically with ton= 15 ms and tor = 60 ms. (a) Determine the inductor current i¿(t) and the zener diode current iz(t) for one switching period. (b) Sketch the instantaneous power for the inductor and the zener diode. (c) Determine the average power absorbed by the inductor and the zener diode. Assumptions: i) When the transistor is turned off, the zener diode breaks down to maintain the inductor current. ii) The voltage across the zener diode is constant at Vz= 30 V when it is conducting in the direction shown in Figure 1. Vcc L

Figure 1 shows a circuit for energizing inductor L and removing the stored energy without damaging transistor Q. In this circuit, Vcc = 20 V, L = 50 mH, and the breakdown voltage of zener Z is Vz= 30 V. The transistor opens and closes periodically with ton= 15 ms and tor = 60 ms. (a) Determine the inductor current i¿(t) and the zener diode current iz(t) for one switching period. (b) Sketch the instantaneous power for the inductor and the zener diode. (c) Determine the average power absorbed by the inductor and the zener diode. Assumptions: i) When the transistor is turned off, the zener diode breaks down to maintain the inductor current. ii) The voltage across the zener diode is constant at Vz= 30 V when it is conducting in the direction shown in Figure 1. Vcc L

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Figure 1 shows a circuit for energizing inductor L and removing the stored energy without damaging transistor Q. In this circuit, Vcc = 20 V, L = 50 mH, and the breakdown voltage of zener Z is V= 30 V. The transistor opens and closes periodically with to= 15 ms and tor = 60 ms. (a) Determine the inductor current i,(f) and the zener diode current i{(t) for one switching period. (b) Sketch the instantaneous power for the inductor and the zener diode. (c) Determine the average power absorbed by the inductor and the zener diode. Assumptions: i) When the transistor is turned off, the zener diode breaks down to maintain the inductor current. ii) The voltage across the zener diode is constant at V,= 30 V when it is conducting in the direction shown in Figure 1.
Transcribed Image Text:Figure 1 shows a circuit for energizing inductor L and removing the stored energy without damaging transistor Q. In this circuit, Vcc = 20 V, L = 50 mH, and the breakdown voltage of zener Z is V= 30 V. The transistor opens and closes periodically with to= 15 ms and tor = 60 ms. (a) Determine the inductor current i,(f) and the zener diode current i{(t) for one switching period. (b) Sketch the instantaneous power for the inductor and the zener diode. (c) Determine the average power absorbed by the inductor and the zener diode. Assumptions: i) When the transistor is turned off, the zener diode breaks down to maintain the inductor current. ii) The voltage across the zener diode is constant at V,= 30 V when it is conducting in the direction shown in Figure 1.
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