It has been quite some time since last mention of Symetron technology, highly efficient electric motors that feature full flux density at high rpm and a 90º torque angle. More recently, Green Car Congress reported that the maker of Symetron electric motors, Raser Technologies, Inc., had signed a business cooperation agreement with HHI (Hyundai Heavy Industries Co., Ltd)
Under the agreement, HHI will manufacture AC induction motors, generators and drives that increase power, torque and efficiency. The Symetron technology incorporates several innovations in electric motors and motor controllers, “which can be applied in a range of packages, AC or DC, and deliver the high torque of a permanent magnet motor without the use of permanent magnets.”
Symetron technology enables greater flux density, thus a smaller package for the same torque. GCC commentator Engineer-Poet also observes that “the lack of permanent magnets means cheaper materials. Induction technology means a higher top speed for a given stall torque.” There is greater efficiency both ways, as an electric motor and electric generator.
The companies anticipate multifaceted relationships in several industrial motor and other marketplaces. This agreement initially targets, but may be expanded beyond, a $400-million segment of the approximately $30-billion worldwide integral horsepower industrial AC induction motor, generator and motor drive market.
Raser and HHI plan to demonstrate the energy savings available through the use of this technology starting with reductions in the parasitic loads associated with the motors, generators, and drive systems used in geothermal power plants being developed by Raser. Other industrial applications such as refrigeration and HVAC equipment are also planned to be targeted.