A unified SVM algorithm for lifetime prolongation of thermally-overheated power devices in multi-level inverters

Mokhtar Aly, Gamal M. Dousoky, Emad M. Ahmed, Masahito Shoyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents a unified space vector modulation (SVM) algorithm for lifetime prolongation of thermally-overheated power semiconductor devices in multilevel inverters. Thermal overheating is the main cause of shortened-lifetime and open-circuit faults of the devices. Power semiconductor devices are subjected to thermal overheating due to their ageing that results from continuous overloading and power cycling. Moreover, thermal overheating in high power devices may result from its degradation and faults in the cooling system. When a thermal overheating is detected in one of the power devices, the proposed algorithm is applied to relieve the overheated device and dangerous circumstances are avoided as a result. The proposed algorithm relies on using the redundancy property between switching states in multilevel inverters to continuously evaluate a cost function of the junction temperature of thermally-overheated device for all possible switching sequences set, then it identifies the optimal relieving switching sequence. The proposed unified SVM is general that can be applied to any multilevel inverter, and also is valid for switching devices, as well as DC-link capacitors. The proposed algorithm has been designed and validated by simulation and experimental prototypes of three-level T-type inverter.

Original languageEnglish
Title of host publicationECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509007370
DOIs
Publication statusPublished - Jan 1 2016
Externally publishedYes
Event2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016 - Milwaukee, United States
Duration: Sep 18 2016Sep 22 2016

Publication series

NameECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings

Other

Other2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016
CountryUnited States
CityMilwaukee
Period9/18/169/22/16

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Control and Optimization

Fingerprint Dive into the research topics of 'A unified SVM algorithm for lifetime prolongation of thermally-overheated power devices in multi-level inverters'. Together they form a unique fingerprint.

Cite this