Embedded digital protection for IPMSM drives

S. A. Saleh, R. Ahshan, M. A. Rahman

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


This paper presents the development, real-time implementation, and experimental testing of a new embedded digital protection for three phase (3φ) interior permanent magnet synchronous motor (IPMSM) drives. The proposed digital protection is established through extracting the high frequency sub-band contents present in the d-q-axis components of the currents drawn by an IPMSM. the desired high frequency sub-band contents are extracted using the wavelet packet transform (WPT). These extracted high frequency sub-band contents contain signature information that allow detecting and classifying transient disturbances occurring in IPMSM drives. Such a structure of the d - q WPT-based digital protection simplifies its implementation, and facilitates its embedding within the controller of an IPMSM drive. Performances of the proposed digital protection are investigated experimentally on a laboratory 5-hp IPMSM drive. Experimental test results for various fault and non-fault transient disturbances demonstrate fast and accurate detection, classification, and responses. Performance features, along with simple implementation of the d - q WPT-based digital protection support its application in IPMSM drives.

Original languageEnglish
Title of host publication2013 IEEE Industry Applications Society Annual Meeting, IAS 2013
Publication statusPublished - 2013
Externally publishedYes
Event2013 IEEE Industry Applications Society Annual Meeting, IAS 2013 - Lake Buena Vista, FL, United States
Duration: Oct 6 2013Oct 11 2013

Publication series

NameConference Record - IAS Annual Meeting (IEEE Industry Applications Society)
ISSN (Print)0197-2618


Other2013 IEEE Industry Applications Society Annual Meeting, IAS 2013
Country/TerritoryUnited States
CityLake Buena Vista, FL


  • Three phase permanent magnet synchronous motor drives
  • d - q-axis components
  • digital filters
  • real-time implementation
  • wavelet transforms

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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