Brushless Motors for Geothermal Cooling Towers

Abstract

The object of the project is to design and build a brushless three phase electric motor with vertical shaft for direct driving of geothermal cooling towers. This application requires a high load torque at low rpm and the brushless motor is the only AC motor that provides this load characteristic. The project requires a careful choice of thrust bearings for high vertical load and high strength materials to resist into highly corrosive environment. This solution eliminates the gear box and transmission shaft installed in standard configuration, increasing reliability, reducing power losses and cutting down noise.