BLCD ROV thruster design : Brushless DC motor thruster design for use on a remote operated underwater vehicle

Abstract: The goal of this project is to design and simulate the electromagnetic circuit of a brushless dc motor meant to be used in a remote operated underwater vehicle. The final product is a drawing, see appendix A & B, of the design and the most relevant parameters are: R = 0.94 ohm and L =1.18mH per phase; at 250 rpm the motor produces 478.8W of power and 18.3Nm of torque at a line voltage of 78.8V rms and a current of 4A. The losses are estimated to 55W, but will likely be higher. Further study is needed before it can be used in an underwater environment.