چكيده به لاتين
Propulsion system may be divided into the following two main groups: diesel propulsion and electric propulsion. The electric propulsion has the following advantages: higher efficiency, reduced noise and vibration, better layout, and improved maneuverability. Among different topologies of electric propulsion, Integrated Motor Propeller (IMP) may be considered the best regarding reliability, efficiency, layout, vibration, and cost issues. The electric motor in this topology is a rim driven one as its stator is fitted in the duct surrounding the propeller and its rotor forms a ring around the tips of the propeller’s blade.
In this thesis, first specification of rim driven electric motor for an IMP unit is determined. As the electric motor and propeller integrated into one unit their design is dependent to each other, so it is necessary to determine electric motor specifications regarding propeller and hull designs. Furthermore, this thesis introduces a new electric motor topology called Ring Winding Axial Flux Permanent Magnet (RWAFPM). This topology is inspired from axial flux and transverse flux topologies and it has advantages such as high reliability, simple manufacturing, high D/L ratio, high pole numbers and torque density. After introducing geometry and work principle of RWAFPM, analytical design equations are presented and sample designs are done once for a RWAFPM motor in an IMP unit and once again for a prototype RWAFPM motor. This thesis also presents an analytical model for performance analysis of RWAFPM topology. The presented analytical model is verified using 3D finite element model and experimental tests.
