ELE 754 Final: ELE 754 Fall 2010 Final Solution
31 Jan 2019
School
Department
Course
Professor
Document Summary
Dr. d. xu formula sheets will not be marked: show details of derivation steps. For three-phase circuits, all the voltages are line-to-line voltages unless noted otherwise: read the question carefully! Part of questions may or may not be related. A boost converter is shown in figure 1. The output voltage is 24v and load resistance is 5 . The converter is running with switching frequency of 10khz. Answer the following questions when the converter is operating in steady state. 1. 1) find the boundary current and determine the operation mode. 1. 2) calculate the peak-to-peak current in the inductor. 1. 3) determine the peak current of the switching device t. 1. 4) find the output ripple voltage (peak-to-peak) across the load. Hint: the ripple voltage can be derived from diode current waveform and capacitor current waveform. A single-phase diode rectifier as shown in figure 2 is supplying a 1kw inductive load with very mh. large inductance.
