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By M. Chomat

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J Williams, and N. G Butler, “An adaptive Power Factor Controller for Three-Phase Induction Generators”, Paper 84 SM 672-2 presented at the IEEE/PES Summer Meeting, Seattle, Washington, July 15-20, 1984. F. ; “Measured efficiency improvements of induction motors with thyristor/triac controllers”, , IEEE Transaction on Energy Conversion, Volume 17, Issue 4, Dec. 2002 pp. ; “Switched capacitor fuzzy control for power factor correction in inductive circuits”, IEEE 31st Annual Power Electronics Specialists Conference, 2000.

For instance, in Fig. 2-a; γt and γ t can be obtained as: 46 Electric Machines and Drives γt = wst + wrt + oss + osr Dag (15) |wst − wrt | Dag (16) γt = where wst , wrt , oss and osr are dimensions of stator and rotor which are shown in Fig. 2-a and Dag is : Dsi + Dro 2 The maximum value of air gap permeance Gmax can be written as Dag = Gmax = μ0 (17) l × min [ wst , wrt ] δ (18) where l and δ are lengths of machine and air gap. 2 Magnetic mesh equations Eqs. (3) and (4) present l + h node equations which are shown relation between magnetic potentials of teeth nodes with stator and rotor teeth fluxes.

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