Improving electric motor performance up to 55 percent

by Jim Greig, Global Sales and Marketing Manager Electronic Materials, LORD Corporation

Jim Greig, Global Sales and Marketing Manager Electronic Materials, LORD Corporation-photo

Jim Greig

LORD Corporation’s Thermoset SC-320 Thermally Conductive Potting Material was recently cited as a solution for improving electric motor performance in a third-party study.

The research, conducted by Shafigh Nategh while a graduate student at KTH in Stockholm, Sweden, dealt with thermal management aspects of electric machinery used in high-performance applications with particular focus put on electric motors designed for hybrid electric vehicle applications. The research can be viewed here: “Thermal Analysis and Management of High-Performance Electrical Machines.”


LORD Thermoset SC-320- a relatively soft, high-thermal conductivity material (3.2 W/m-K) with sufficiently low viscosity to be used in vacuum potting – was evaluated in Nategh’s research. Nategh’s research notes that hot spot temperatures can be reduced by 35-50 percent using this material as compared to an un-potted motor, compared to improvements of only 20-30 percent using typical epoxy potting materials. According to Dan Barber, Ph.D., a staff scientist in LORD Corporation’s Open Technology Innovation group, this material may provide significant improvements in power density of electric motors.

Barber noted the decrease in hot-spot temperature, depending on current, may provide: 1). Increase in achievable power/ torque for a given motor size, 2). Decrease in motor size for a required power/ torque, and 3). Longer operation of motor before reaching temperature limit.

Want to learn more? Read the full article here in the October 2013 Electric & Hybrid Vehicle Technology Expo newsletter.