Effects of Modern Variable-Speed Drives on Motor-Winding Insulation by Distinguished Lecturer Blake Lloyd

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IEEE North Saskatchewan IAS/PES Chapter is proud to present:

Tutorial/Technical Seminar on the Effects of Modern Variable-Speed Drives on Motor-Winding Insulation by Distinguished Lecturer Blake Lloyd.

Abstract - For over 70 years, researchers have understood that fast rise-time voltage surges from a circuit breaker closing can lead to an electrical breakdown of the turn insulation in motor stator windings.  Rapid advances in power electronic components in the past decade have lead to a new source of voltage surges.  Inverter-fed drivers (IFDs) of the pulse width modulated (PWM) type that use insulated-gate bipolar junction transistors (IGBTs) can create tens of thousands of fast rise-time voltage surges per second.  Anecdotal evidence suggests that the large number of voltage surges from IFDs can lead to gradual deteriorations and eventual failure of the turn insulation—both in low voltage (less than 1,000V) and medium voltage (2.3 to 4.16kV) motors .  This presentation describes the characteristics of voltage source PWM drives Impact on random wound (LV) motor stators  as well as the impact on form wound (MV) stators.  It will also describe the relevant standards to qualify insulation systems for converter fed motors .


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  • Littelfuse Startco
  • 3714 Kinnear Place
  • Saskatoon, Saskatchewan
  • Canada S7P 0A6
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  • Starts 05 March 2017 08:24 PM UTC
  • Ends 18 April 2017 08:24 PM UTC
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  Speakers

Blake Lloyd of Iris Power

Topic:

Effects of Modern Variable Speed Drives on Motor Winding Insulation

Biography:

Blake Lloyd, PEng. Fellow IEEE, Director – Product Development, Iris Power. Mr. Lloyd is an Electrical Engineer with extensive experience in instrumentation and product development. In past lives, he worked in software development and then in the Electrical Research Department at Ontario Hydro, where he was responsible for conducting research into advanced measurement, testing, and diagnostic monitoring techniques for rotating machines and insulation systems. Since co-founding Iris Power in 1990, Mr. Lloyd has been one of the principle architects of Iris’s line of diagnostic instrumentation and analysis software for rotating machine condition assessment.   Products include on-line partial discharge monitoring, air gap flux monitoring, current signature analysis, end-winding vibration, shaft voltage and current monitoring, as well as several off-line test instruments.   Mr. Lloyd has two US patents, and has published 20 refereed papers in IEEE and CIGRE, as well as over 40 conference papers.   He has been a Member of IEEE since 1985 serving in the following capacities:

  • 1992-1994 - Committee Member – IEEE/PES Hydro-generator Subcommittee

  • 2002-2003 – Canadian Expert – IEC Technical Committee 2: Rotating Machines, WG 26

  • 2006-2007 - Chairman - IEEE/IAS Pulp and Paper Technical Committee

  • 2008-2009 – Chair IEEE/IAS Executive Board Electronic Communications Committee

  • 2010 Meritorious Engineering Award Winner of IEEE/IAS Pulp and Paper Technical Committee

  • 2013-2014 – President IEEE Industry Application Society




Agenda

12:00 PM - 1:00 PM     Lunch

01:00 PM - 4:00 PM    Tutorial/Technical Seminar

04:00 PM - 4:30 PM    Networking