Patent ID: 8912704

Claim:
An Electromechanical machine, comprising: inner and outer structures, at least one of said structures rotating relative to another of said structures; a plurality of rotor poles disposed on the rotating structure; a plurality of stator poles disposed on the other structure, wherein said rotor poles and stator poles cooperate to generate electricity from rotation or convert electricity to rotation; at least one of said structures being formed as a plurality of sections, each section containing a number of its respective poles; and one or more circuits through which said stator poles cooperate, said circuits being arranged in one or more electrical phases; wherein the number of sections is an integer multiple of the number of phases the number of circuits is a factor of a maximum number of circuits; the number of poles per section is an integer that is not a whole number multiple of the number of phases; the maximum number of circuits correspond to one of the following parameters, if the number of poles per section is an even number, the maximum number of circuits is equal to twice the number of sections divided by the number of phases, or if the number of poles per section is an odd number, the maximum number of circuits is the number of sections divided by the number of phases; the poles of said structure including the plurality of sections are arranged in sets of poles as sectionalized poles, a set of said poles is disposed in each one of said plurality of sections and each set has two end poles, one at each section end; the poles within each set are positioned as a function of a frequency of a torque ripple harmonic to be at least reduced in operation of the machine; the sectionalized poles within each get are arranged at a section pole pitch, the section pole pitch being a function of the frequency of the torque ripple, harmonic to be at least reduced in operation of the machine; and the end poles of adjacent sections are spaced at a boundary pole pitch, the, boundary pole pitch being a function of the section pole pitch.