First Advisor

Mahima Gupta

Term of Graduation

Summer 2024

Date of Publication

8-29-2024

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Electrical and Computer Engineering

Department

Electrical and Computer Engineering

Language

English

Subjects

capacitors, DC-AC power converters, pulse width modulation

Physical Description

1 online resource (viii, 75 pages)

Abstract

Three-phase DC/AC power converters enable several applications including photovoltaic systems, electric traction inverters, uninterruptible power supplies, and utility systems. The classical three-phase voltage source inverter (VSI) topology only operates in voltage step-down or buck mode of operation. Increasing number of applications including transformer-less photovoltaic systems, battery cells, fuel cells, and traction motors require a wide range of input and output voltage range. Therefore, a DC/AC power converter topology capable of voltage buck and boost operation will enable wider operating range resulting in efficient and higher performance system designs. This thesis presents a single-stage bidirectional power flow DC/AC inverter topology capable of buck and boost mode of operation with a minimum switch count and a carrier-based sine-pulse-width modulation approach. Furthermore, due to the presence of intermediate but small reactive elements sized to filter switching frequency, the output voltages and currents are non-switched non-pulsating waveforms thus improving output harmonic performance and reducing over-voltages due to long motor cables. The proposed topology is examined through analytical, simulated, and experimental results.

Rights

© 2024 Daisy Delgado-Zaragoza

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Persistent Identifier

https://archives.pdx.edu/ds/psu/42569

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