Abstract

There are four VFD Secondary Circuit considerations that can compromise the life expectancy of VFD driven motor , cable installations and load mechanical equipment: PWM Output Waveform Harmonics, Resonance/Reflective Wave, Transient Voltage Events, and Common Mode Noise. VFD primary harmonics is a well understood condition with an IEEE Standard to cover harmonic distortion/circuit design criteria, but no Standard covering output circuit design and performance requirements. The presentation will cover these four conditions and discuss design options to avoid secondary circuit damage and extend the life cycle of the installation. A full paper discussion will be provided to expand the presentation discussions.

Presenter

Michael McGraw – Business Development & Engineering Services at Five Star Electric

Austin Miller – Power Quality Sales Manager at Mirus International

Mike was previously US Regional Manager for Mirus International, from 2018 – 2022, Independent Engineering representative for Mirus International from 2009 – 2018, and President and Founder of NSOEM, Inc. 1996 – 2018 He is a member of the IEEE – IAS and has previously published IEEE papers presented at the PCIC 2010, 2014, 2015, 2016, 2018, 2019 & 2024.

Austin oversees the U.S. market for Mirus.. Before joining Mirus International Inc. in 2023, he gained valuable experience as an application engineer specializing in power system harmonics at CTM Magnetics. He is a member of the IEEE.