This paper presents the analysis method for the torque characteristic of the 1-phase induction motor considering space harmonics in the air gap. The equivalent circuit method is used, where the circuit constants are obtained by classic theory. In addition, the space harmonic components in air gap magneto motive force are analyzed and added to the equivalent circuit to obtain accurate torque characteristics in low speed regions. Each torque component due to the harmonics is calculated and the total torque characteristic is obtained and compared with the measurement result.
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Byung-Il Kwon, Byung-Taek and Cha-Seung Jun, 'Analysis of axially non-uniform loss distribution in 3-phase induction motor considering skew effect' IEEE Trans. On Magnetics, Vol. 35, No. 3, pp. 1298- 1301, May 1999
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Alger, The nature of polyphase induction machine, John Wiley & Sons Inc., New York, 1951
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2014. "" Journal of electrical engineering & technology, 9(1): 178~183