Disclosed is a rotor for an electrical machine includes a rotor hub comprising a multifaceted surface extending along a perimeter of the rotor hub. Each facet of the multi-faceted surface may have a substantially planar surface. A plurality of permanent magnet assemblies is disposed circumferentially around the multifaceted surface. Each individual permanent magnet assembly of the plurality of permanent magnet assemblies is coupled to the substantially planar surface of a corresponding facet.