Scientific program > Plenary Speakers

Florent Nierlich,
New electrical propulsion systems for new aerospace mobility

Safran presentation is about :
-Motor drive systems for hybrid-electric propulsion systems
-Electrical protection for HVDC power supply
Electrical Motor characteristics are detailed , including means to enhance thermal management  and improve efficiency . Power and torque density numbers based on actual hardware will be provided.
Key design drivers for motor and motor controller to improve safety and robustness are also covered.
Presentation will end by addressing electrical protection strategy for the whole propulsive electrical chain . Protection architecture and associated electrical protection  components to cope with HVDC power feeders up to 850 Vdc will be introduced.

Marco Liserre, Germany
Modulation and control of modular power converters for high-power applications

In this presentation modular power converters made by series or parallel connection of basic conversion cells are discussed respect to their application-specific challenges and to the possibility to tackle them through modulation and control approaches. As a consequence applications in the field of power quality, regenerative energies and HVDC are considered. These high power applications have often conflict requirements in terms of high efficiency, reliability and high bandwidth. Moreover power system aspects related to the connection of hybrid grids and their protections are also considered and addressed at power converter level. The presentation reports examples from strategic projects developed to support the so called "Energie Wende" (Energy Change) in Germany, where technologies for enabling a 100 % sustainable society are studied in cooperation with major companies in the field.

Professor Zi-Qiang Zhu, UK
Airgap Field Modulation and Magnetic Gearing in Fractional Slot Permanent Magnet Machines and Vernier Permanent Magnet Machines

Due to high torque density and high efficiency, permanent magnet (PM) machines have been widely employed for many applications, including industrial servo drives, domestic appliances, automation, aerospace, robots, and recent successful commercial examples are electric vehicle propulsion machines and wind power generators. This presentation will systematically overview various novel fractional slot permanent magnet machines and Vernier permanent magnet machines, as well as their inherent links in structures and characteristics as magnetic gears. The presentation will describe their operation principles in terms of airgap field modulation and magnetic gearing, compare their relative merits and demerits, as well as electromagnetic performance, particularly their torque density, and also highlight their applications.

Dr. Babak Nahid-Mobarakeh, Canada
Motor Control for Electrified Transportation Systems

Electrification of road, sea and air transportation systems is ongoing for over two decades. New trends are towards more environment friendly electric motor drives reducing their carbon footprint in their manufacturing, operating, and recycling process. For this, a range of technologies from Permanent-Magnet Synchronous Motors (PMSM) to Switched Reluctance Motors (SRM) through Permanent-Magnet assisted Synchronous-Reluctance Motors (PMa-SynRM) have been developed and employed in electrified transportation systems. Various power electronic drives have been reported to supply these motors. Among them, many research exhibit two-level and multi-level Voltage-Source Inverters (VSI), Current-Source Inverters (CSI), and Y-source and Z-source inverters for different missions in electrified transportation systems and comparisons have been made based on metrics like power density, specific power, efficiency, reliability, carbon footprint and cost.

After a quick overview of concepts and presentation of some existing motor drive solutions in electrified transportation systems, the keynote will describe the state-of-the-art of motor control techniques and their design, performance and robustness supported by simulation and experimental results. Then, challenges and future trends of the control of electric motor drives will be discussed.