Patent ID: 7432623

Claim:
An electromechanical machine comprising: a stator including at least one stator module having a plurality of toroid-shaped electromagnets, each of the electromagnets defining a first gap and a second gap, wherein each of the electromagnets are arranged along an arc a predetermined distance apart defining a stator module arc length; and a rotor including a disc having a first ring of permanent magnets of a predetermined number and a second ring of permanent magnets of the same predetermined number, the rotor defining an axis of rotation, the first ring is coaxial with and arranged about a periphery of the disk, the second ring is coaxial with and of a smaller diameter as the first ring of permanent magnets, the plurality of permanent magnets of each ring spaced side by side and arranged so as to have alternating north-south polarities, the rotor adapted to pass the first ring of permanent magnets through the first gap and the second ring of permanent magnets through the second gap of the electromagnets, the permanent magnets being sized and spaced such that within the stator module arc length the ratio of permanent magnets to electromagnets is N+1 to N, where N equals a number of electrical excitation phases applied to the electromagnets.