Root-cause-analysis of crane system variable frequency drive failures through testing and power quality analysis

Author

• Elizabeth Hayes, Mississippi State UniversityFollow

Advisor

Wallace, David

Committee Member

Fu, Yong

Committee Member

Karimi, Masoud

Date of Degree

5-15-2026

Original embargo terms

Immediate Worldwide Access

Document Type

Graduate Thesis - Open Access

Major

Electrical & Computer Engineering

Degree Name

Master of Science (M.S.)

College

James Worth Bagley College of Engineering

Department

Department of Electrical and Computer Engineering

Abstract

This study investigates the root-cause-analysis of repeated failures of an AC-DC converter in a variable frequency drive system on a 325-Ton crane through electrical testing based on NETA and IEEE standards. The testing is accompanied with a power quality study based on the IEEE 519-2019, simulation using SKM power modeling software, and fault study from two captured faults. The converter failures presented no immediate solution despite experienced technicians, engineers, and other specialists. This study attempts to eliminate root-cause by examining the line-side equipment and in-feed power quality as contributions to the converter faults.

Recommended Citation

Hayes, Elizabeth, "Root-cause-analysis of crane system variable frequency drive failures through testing and power quality analysis" (2026). Theses and Dissertations. 6910.
https://scholarsjunction.msstate.edu/td/6910