DeltaWing Technology Group—creators of the DeltaWing vehicle design (earlier post)—and DHX Electric Machines—a Georgia Tech spinout and developer and manufacturer of ultra-high torque density electric machines using proprietary and patented direct cooling technology—announced an agreement granting DeltaWing worldwide rights to make, use and sell DHX electric motors and components specifically designed for automotive applications.
DHX traction motor technology is based on proprietary direct-winding heat exchange cooling technology that is able to remove motor heat at the source—the stator windings. The technology is based on the advanced micro-feature heat exchange research and development efforts of Dr. J. Rhett Mayor (DHX CEO) and Dr. S. Andrew Semidey (DHX VP of Engineering) at the George W. Woodruff School of Mechanical Engineering at Georgia Tech.
The direct-winding heat exchange system uses micro-feature technology to increase the area of the cooling surface by up to 4 times that of a standard cooling channel. The micro-feature technology also helps to increase the relative flow velocity of the coolant, by a process of localized turbulence.
As a result, the DHX cooling technology removes more than 10 times the heat of a standard coolant channel, the startup claims. More heat removal means more current (about 4 times more) leading to 4 times the torque. From another view, the DHX motor is 4 times smaller than a standard motor of the same power, the company says.
Our DHX Falcon electric motor features standard materials, not exotic steels and magnets. It achieves power densities of 120 horsepower per gallon (25 kW per liter) and extraordinary torque of 195 lb-ft/gallon (70 N·m/l). In simple terms, it delivers the power and torque of the standard sedan’s powertrain in the space of a one-gallon can of paint.—J. Rhett Mayor
The DHX Falcon 80 hp (60 kW) motor weighs 30 lbs (13.6 kg) and delivers 96% efficiency. The most advanced DHX motor, using best in class materials and exotic steels, delivers extreme power densities approaching 250 hp (186 kW) per gallon, putting out 400 lb-ft (542 N·m) of torque. Putting two of these motors in an automotive platform, one on each axle, would enable a 500 hp (373 kW), 800 lb-ft (1,085 N·m) powertrain.
|80-hp DHX Falcon electric motor (foreground) compared to a conventional 1.5-hp electric motor. Click to enlarge.|
This is a marriage of two extremely innovative approaches—one bringing to market the state-of-the-art and efficient DeltaWing vehicle architecture and other vehicle platforms, and the other an electric motor tech leader able to make amazing power and torque in a truly tiny package. We’re both entrepreneurial dreamers and together we’ll change cars as we know them today. That’s why we’re coining our approach disruptive cumulative technologies.—Don Panoz, chairman of DeltaWing Technology Group
DHX Electric Machines Inc. has relocated to the DeltaWing Technology Group campus in Braselton, Ga. Both companies are ramping up electric motor production and developing applications for multiple DeltaWing Technology Group automotive projects.
DeltaWing Technology Group will apply DHX’s motors in road-going vehicles ranging from scooters and small vehicles designed for congested urban areas to everyday automobiles and delivery vehicles.
One such vehicle is the DeltaWing road car. DeltaWing Technology Group created the DeltaWing vehicle design with significantly reduced overall mass. Less weight means less horsepower is needed to move a vehicle, which reduces fuel/energy consumption. The design can use electric or hybrid powertrains and small and light high-efficiency gas, diesel and compressed natural gas (CNG) engines.