REET 420 WEEK 5 HOMEWORK / POWER ELECTRONICS AND ALTERNATIVE ENERGY APPLICATIONS WITH LAB
REET 420 Week 5 Homework Answers (DeVry)
1. Locate a data sheet for a 1N4004 diode. Determine its average forward current, maximum forward voltage, and peak reverse voltage. Calculate the maximum power it must dissipate.
4. Design a switch using a Darlington pair to drive a 35 Ω load powered from a 24 Vdc supply. Determine the collector current, base current, base resistor, power delivered to the load, and the transistor power dissipation for a 75% duty cycle pulse.
8. Design a switch using an IRF630 to drive a 25 Ω load powered from a 150 Vdc supply. Determine the drain current, required gate pulse amplitude, power delivered to the load, and the transistor power dissipation for a 80% duty cycle pulse, and the required heat sink maximum thermal resistance for TA = 60°C.
CHAPTER 8
7. A 200 W light bulb is powered from a 120 Vrms line voltage, and is switched on and off with a S4006LS SCR.
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