A Dual Halbach Array, High Power Density Electric Motor for Electric Air Platforms

An axial flux, coreless, brushless DC motor is proposed as a solution to the need for an extremely high power density motor for the electric vertical take off and landing UAV application. The proposed dual Halbach array field assembly is the enabling innovation which increases the magnetic field in the coil while eliminating the need for any iron. Eliminating iron maximizes the benefits of using carbon fiber housings which can be significantly lighter than the equivalent iron housings. The dual Halbach array field assembly also reduces AC losses and enables a much higher pole count resulting in a much lighter motor. LaunchPoint Technologies has a wealth of experience making Halbach arrays, complex electro-magnetic systems and custom motors and can realize the goal of developing a feasible 7 HP motor with power density of greater than 5 HP/lb and efficiency greater than 95% at 8400 RPM.