Our participation in a panel session at CENEX-Low Carbon Vehicle (LCV2021) elicited some serious interest and we’re more confident than ever that our system will change the fate of electric propulsion.
The session, entitled “Using Magnetic Engineering to Improve EV Performance,” was short, to the point, and well worth the attendees’ time (despite taking place during lunch time).
ePropelled’s CTO, Dr. Nabeel Shirazee, and Head of EV Strategy, David Hudson, delivered the talk, in which they discussed our groundbreaking new electric vehicle propulsion system (eDTSTM, showcased at the event) and the performance improvements provided by it.
David introduced the subject and described the role of eDTS in an electric machine, outlining its capabilities. One of the slides he presented described the system in his usual on-point manner:
“eDTS is a patented complete propulsion system technology with:
- innovative motor design with reconfigurable windings,
- matrix switching that enables reconfiguration in real time,
- adaptive power electronics drive, and
- software control that uses machine learning and AI to optimize operation for vehicle and driver.
It uses available energy resourcefully thanks to:
- lower current draw at high torque, extending charge and life of battery,
- no deep field weakening at any speed,
- extended constant power region, and
- patented cooling technology including pumps.”
David outlined the main benefits of the eDTS system and its place in the EV energy equation before handing it over to Nabeel who, as he put it, talked about the “exciting stuff.” And being a real-life inventor, he used numbers and graphs (of course) that show our system’s advantages over conventional motors. Below is a perfect example of what eDTS can achieve when compared traditional motors.
The exact details of the patented design were not included in the session due to time restrictions, but eDTS comprises three main components:
- The eDTS motor is a brushless permanent magnet synchronous machine. In this example it is an interior permanent magnet motor (IPM motor) where the rare earth magnets are embedded in the rotor. The laminated cores, distributed phase windings, and integrated water-cooling ducts in the housing are only a few of the design choices that contribute to an ideal combination of high torque, high power density, and high efficiency.
- The power electronics drive includes a high voltage inverter and a control system. Based on vehicle demand, the control system will automatically select the most efficient operation mode, which will save battery energy and increase driving range. The control system uses real-time adaptive shift maps and machine learning to control the switch matrix and the motor parameters for optimum propulsion system performance.
- The switch matrix links the many windings of the motor to the phases of the drive. Based on the input from the control system, the switch matrix connects the sections of the windings in a series, series parallel combinations, or all in parallel. Among other advantages, this manages the control of the induced back electromotive force (back EMF), current draw and density, and magnetic flux linkage, resulting in switching the torque, speed range, and constant power range.