Abstract: A homopolar alternating current machine (HAM) is disclosed which includes a stator having a plurality of segments radially protruding outward, each segment includes a main winding, a first auxiliary winding, and a second auxiliary winding, whereby each of the first and second auxiliary windings are coupled to each other in a parallel manner, a first rotor disposed proximate the stator, a second rotor disposed proximate the stator, and a dc flux source corresponding to each of the first and second rotors, whereby substantially no excitation of the first and the second auxiliary windings of each stator segment of the plurality of segments is needed to operate the HAM, whereby when energized, there is substantially no DC flux in each of the main winding, wherein operating the HAM results in a substantially sinusoidal current waveform without a DC offset, and wherein the HAM can be operated as a motor or generator.