Alex Pokryvailo

This lecture is intended for engineers and researchers in the field of high voltage electronics who want to expand or refresh their understanding of the parasitics impact on operation and design of HV converters in everyday practice. The lecture focuses on power circuitry of high-performance switchmode power supplies ranging from units to hundreds of kV. “Resonant” behavior is regarded as the influence of the HV transformer and voltage multiplier on the converter current waveforms. HV transformer equivalent circuits are discussed; their choice for further analysis is justified both theoretically and experimentally. Over-voltages (OV) generated by high harmonics are analyzed with Fourier transforms.

Biography:

Alex Pokryvailo (M’05–SM’07) was born in Vyborg, Russia. He received the M.Sc. and Ph.D. degrees in electrical engineering from the Leningrad Polytechnic Institute in 1975 and 1987, respectively. Formerly with Soreq NRC, now he is with Spellman High Voltage Electronics where he has been serving as Director of Research for 16 years transitioning lately to the role of Engineering Fellow. His current and recent experience relates to design of HV high-power switch-mode power supplies, Pulsed Power, insulation testing, multiphysics simulations, fast diagnostics, and corona discharges. Previously, he studied switching arcs, designed SF6-insulated switchgear, researched interaction of flames with electromagnetic fields, etc. He has published over 150 papers, two textbooks, and more than 20 patents pertaining to HV technology.