Monday, September 24, 2012 - 4:00pm to 4:50pm
KEC 1003

Speaker Information

Julia Zhang
Assistant Professor
School of EECS
Oregon State University


First part of this talk will introduce the research trend in hybrid electric vehicles and electric vehicles from both the component level and the system integration level. The second part of the talk will present the torque ripple compensation algorithm for interior permanent magnet synchronous machines for HEV/EV applications. Interior permanent magnet (PM) synchronous machines are used for propulsion purpose in more aspects of transportation electrification such as passenger-size hybrid electric vehicles and battery electric vehicles, all-electric ships, more-electric aircrafts and so on. The torque ripple produced by the interior PM machine can excite undesirable vibrations in the electric-drive propulsion system when the frequency of the torque ripple is close to the propulsion mount resonance frequencies. This causes noise, vibration, harshness (NVH) issues and unacceptable performance for the electric-drive propulsion system. This talk discusses on the principle of electromagnetic torque ripple production in interior PM machines and investigates the control algorithm to compensate one or more harmonics in the torque ripple causing system resonance.

Speaker Bio

Julia Zhang received her Ph.D. degree in electrical engineering from The Ohio State University in 2010. She joined the power and energy systems research group at Oregon State University in fall 2012 as an assistant professor. Her research interests are in the areas of electric machine design, electric drive control, power electronics and their advanced applications in transportation electrification. Before she joined OSU, Julia was an engineer at Ford Motor Company for 2 years and half and leading design and development of electric machine drive and power electronics control strategies for Ford’s 2013 hybrid electric vehicle models: fusion full hybrid, fusion plug-in hybrid, C-Max full hybrid and C-Max plug-in hybrid.