IEEE Pizza & Learn: Myths of transmission lines and high-power battery chargers
Join us as Dr. Khan debunks some of the myths around HV transmission lines and the impact of generated electro-magnetic fields. Also, we will learn about three-phase LLC resonant converters used in battery chargers. These converters allow for better thermal management, ripple and smaller filter designs thereby drastically increasing power density.
Date and Time
- Date: 23 Oct 2019
- Time: 05:00 PM to 06:00 PM
- All times are Canada/Pacific
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- 2332 Main Mall
- Vancouver, British Columbia
- Canada V6T 1Z4
- Building: Fred Kaiser Building
- Room Number: 2020
- Click here for Map
- Starts 07 October 2019 03:57 PM
- Ends 22 October 2019 11:57 PM
- All times are Canada/Pacific
- No Admission Charge
Dr. Jahangir Khan of BC Hydro
Myth-busting: Electric and Magnetic Fields around High Voltage Power Lines
Electric and magnetic fields around electronic devices and high-voltage transmission lines follow the same principles. However, at different scales the impacts are different. In particular, there are many misperceptions about electric fields around high voltage power lines. From short duration shocks to long-term physiological impacts – all have important public and worker implications. This talk will review the fundamentals, and present a number of practical scenarios where electric and magnetic fields play dominant roles in the design utility-owned power lines or privately-owned infrastructures.
Jahangir Khan is a Senior Engineer at BC Hydro’s Transmission Engineering Division. As a member of the Electrical Design team, he is responsible for conducting electrical studies related to electromagnetic fields (EMF), electromagnetic transients (EMTP), lightning performance, electrical coordination with pipeline and other assets, worker and public safety.
Jahangir received his Doctoral and Master’s degrees from Memorial University of Newfoundland (MUN), Canada in 2010 and 2004, respectively. He completed his Bachelor’s degree in Electrical Engineering from Bangladesh University of Engineering and Technology (BUET) in 2001. Jahangir is a registered professional engineer in BC and a senior member of IEEE.
Sayed Abbas Arshadi of The University of British Columbia
Three-Phase LLC Resonant Converters for Battery Charger Applications
Battery chargers are the power processing stage between energy sources and batteries. In order to be able to cope with newer technological requirements, higher efficiency, higher power density, and enhanced reliability are expected from this type of power converter. The safety, durability, and performance of batteries are highly dependent on how they are charged or discharged. Due to the desirable features of three-phase LLC resonant converters, they have investigated for medium to high power levels. Three-phase LLC resonant converters provide high efficiency, low current ripple, good thermal distribution, and small filter and heat sink size (high power density), that makes them an attractive option for high power battery charger applications. Two main issues to be investigated for three phase resonant converters are: 1) passive components tolerances, which leads to unbalanced behavior of the converter, 2) development of a balancing technique to mitigate the unbalanced behavior of the converter. In this work, methods to use three-phase LLC resonant converters more efficiently are investigated.
Sayed Abbas Arshadi (S'16) was born in Isfahan, Iran. He received his B.Sc. degree in Electrical Engineering from the Malik Ashtar University of Technology, Isfahan, Iran, in 2012, and his M.Sc. degree in Electrical Engineering (Electronics) from the Isfahan University of Technology (IUT), Isfahan, Iran, in 2015. He is currently working toward his PhD degree at the University of British Columbia (UBC), Vancouver, BC, Canada.
He was a Researcher with the Information and Communication Technology Institute (ICTI), Isfahan, Iran, from 2013 to 2016, where he was involved in the design and implementation of power converters. He is also a Research Scholar with Delta-Q Technologies, Burnaby, BC, since 2016. His current research interests include medium and high power DC-DC resonant converters for battery chargers and renewable energy applications.