QM Power and the SPARK Lab at the University of Kentucky shared the combined results of a large-scale, multi-objective design optimization study, and lab testing of a prototype motor designed to meet the ambitious 2025 power density goals set by the US Department of Energy (DOE).
The research demonstrated the high torque and speed capability of QM Power’s innovative permanent magnet motor technology. This, combined with advanced manufacturing and cooling technologies, achieved a record-high 50kW/liter volumetric power density for traction applications such as electric vehicles (EV).
Open frame lab prototype
The announcement was made at the 2021 IEEE Energy Conversion Congress and Expo (ECCE) by the joint team of researchers including Dr. Madhav Manjrekar, SMIEEE, of QM Power, who also holds a tenured faculty position at the University of North Carolina, Charlotte, and Dr. Dan M. Ionel, FIEEE, who serves as the inaugural L. Stanley Pigman Chair in Power at University of Kentucky, where he also directs the SPARK Lab.
The computational study was conducted at the SPARK Lab. An open-frame lab prototype was designed and manufactured by QM Power. Tests and extensive simulations were conducted at the University of North Carolina, Charlotte, and at the University of Kentucky to reveal the best outcome given trade-offs among efficiency, power density, and power factor while achieving the DOE 2025 target.
New vehicle architectures
QM Power’s patented design employs no magnets in the rotor, thus minimizing these risks
In 2019 the US DOE established the 2025 goal as part of an ongoing effort to reduce dependency on resources such as fossil fuels and rare earth magnets. It represents an ambitious 89% reduction in motor volume compared to 2020 targets.
This project is among the programs which the DOE’s Vehicle Technologies Office deems to ‘have the potential to support radical new vehicle architectures by dramatic volume/space reductions and increased durability and reliability.’
QM Power’s patented design employs no magnets in the rotor
Major challenges associated with existing designs include the overheating and demagnetization of the rotor during system operation. QM Power’s patented design employs no magnets in the rotor, thus minimizing these risks and enabling highly effective direct cooling of magnets in the stator.
“The unique topology of this motor enables lighter, smaller electric motors which are more efficient and easier to manufacture,” said Madhav Manjrekar.
Enabling electric transportation
Madhav Manjrekar adds, “These motors are expected to offer superior performance in terms of torque production and achieve more miles per charging cycle, thus enabling electric transportation at much lower costs.”
“We are very happy to be part of the research team with QM Power on motor technology that can be transformational to the industry,” said Dan M. Ionel, adding “The ultra-high power density motors can be beneficial to many applications, including electric vehicles and airplanes.”