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Assignment 9 Problems with Solutions for Power Electronics | ECE 481, Assignments of Electrical and Electronics Engineering

The University of Tennessee (UT)Electrical and Electronics Engineering
Prof. Leon Tolbert

Material Type: Assignment; Professor: Tolbert; Class: Power Electronics; Subject: Electrical And Computer Engr; University: University of Tennessee - Knoxville; Term: Unknown 1989;

Typology: Assignments

Pre 2010

Uploaded on 08/26/2009

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Exercise 9 1-Phase Thyristor Rectifier Bridge AYA + al ~ lg 1Z\ 3 ZN | Ly Ly __arm_arm___} | ; —> | A. 1 | (ey s b TS ‘in V Ss 5M d S R oad ——-* + aL 4ZX\ 2ZN\ Nominal values: Vs(rms) = 120 V at 60 Hz Ls1 = 0.2 mH Ls2 = 1.0 mH Ld = 20 mH Rload = 5 Q delay angle a = 45° Problems Thyreck b 1. (a) (b) ©) Obtain vg, vg and ig waveforms. Obtain vg and ig waveforms. Obtain vyq and ig waveforms. From the plots, obtain the commutation interval u and the de-side current at the start of the commutation. By means of Fourier analysis of ig, calculate its harmonic components as a ratio of isi. Calculate Is, %THD in the input current, the input displacement power factor and the input power factor. At the point of common coupling, obtain the following from the voltage vm waveform: (a) Line-notch depth p(%) (b) _ Line-notch area and, () voltage %THD.