Jahns is a Grainger professor of Power Electronics and Electric Machines in the Department of Electrical and Computer Engineering at the University of Wisconsin–Madison. Jahns's research interests span the technical fields of electrical machines, power electronics, and adjustable-speed drives. He has a long record of research contributions in the area of permanent magnet synchronous machines for a wide variety of applications ranging from high-performance electric vehicles to low-cost appliance drives. A significant theme of his research is the integration of power electronics into electric machines, loads, and sources in order to reduce weight and cost while increasing reliability. He is also actively involved in the development of renewable energy sources, energy storage, and microgrids for the future electric grid. Jahns received his PhD from the Massachusetts Institute of Technology.