Scholarly
    Communications Project


Document Type:Master's Thesis
Name:V H Prasad
Email address:prasadvh@vpec.vt.edu
URN:1998/00177
Title:ANALYSIS AND COMPARISON OF SPACE VECTOR MODULATION SCHEMES FOR THREE-LEG AND FOUR-LEG VOLTAGE SOURCE INVERTERS
Degree:Master of Science
Department:Electrical Engineering
Committee Chair: Dr. Dusan Borojevic
Chair's email:dushan@vt.edu
Committee Members:Fred C. Lee
Dan Y. Chen
Keywords:Space Vector Modulation, Inverters,
Date of defense:May 15, 1997
Availability:Release the entire work immediately worldwide.

Abstract:

ANALYSIS AND COMPARISON OF SPACE VECTOR MODULATIONSCHEMES FOR THREE-LEG AND FOUR-LEG VOLTAGE SOURCE INVERTERS by V.Himamshu Prasad Dusan Borojevic, Chairman Electrical Engineering (ABSTRACT) Several space vector modulation schemes have been analyzed for three-leg and four-leg voltage source inverters. The analysis is performed with respect to a) switching losses, b) total harmonic distortion, c) peak-to-peak ripple in the line current and d) the ease of digital implementation. The analysis is performed over the entire range of modulation index and for varying load power factors (leading and lagging) under both balanced and unbalanced load conditions. The analysis shows that the performance of four-leg inverters is similar to three-leg inverters for various space vector modulation schemes. The analysis also verifies the fact that a modulation scheme with good harmonic performance usually has high switching losses and vice-versa. The analysis is verified using simulation and experiments. A novel algorithm for the calculation of total harmonic distortion of PWM signals has been proposed.

List of Attached Files

ACK.PDF append.pdf chap1.pdf
chap2.pdf chap3.pdf chap4.pdf
refer.pdf title.pdf


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