IEEE-NCS, IAS/PES Presents
Wednesday, April 19th, 2017, 6:00 to 8:30pm, doors open at 5:30pm

Effects of Modern Variable Speed Drives on Motor Winding Insulation

Presented By: Blake Lloyd, P.Eng., F.IEEE, Past-president IAS 

IAS Distinguished Lecturer Technical Seminar 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

Young Professional Opening Talk: Alberta`s Safety Code and Quality Management Plan

A high level view of how public safety is protected and the interfaces between engineering professionals and Alberta government Acts, Regulations, and processes.

Presented By: Carl Lam, P.Eng., M.IEEE, PES & IAS Chapter Chair 

Carl presents Blake with a token of appreciation

To download the presentation slides, please click here 

To view the archived event notice, please click here