Electromagnetic Machine

A 3-phase motor comprising:

• (i) a rotor comprising four or more permanent, cylindrical magnets arranged in sequence in alternatingly opposed orientation with a pitch at least substantially three times their polar length, wherein the rotor spins about an axis such that the magnets follow a toroidal path;
• and
• (ii) a stator having at least 3 windings, wherein for each winding first and second shaped portions thereof extend substantially transverse to and adjacent to the toroidal path,
• wherein
• the first and second shaped parts of each winding induce oppositely directed magnetic fields in or around the toroidal path to act on, respectively, the alternatingly opposed adjacent magnets;
• the pitch of the magnets is three times their polar length;
• the pitch of the first and second shaped parts is the same as the pitch of the magnets;
• each of the 3 windings is for connection to a different phase of a 3-phase power supply;
• and
• the 3 windings are staggered around the toroidal path so as to act successively on the magnets.