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The authors comment on the paper by L.U. Gokdere et al. (see ibid., vol. 48, p.870-2, 2001). A review of the experimental evidence shows that passivity-based control of saturated induction motors does not provide superior performance over input-ouput linearization. Higher tracking errors can be observed and traced to the open-loop nature of the flux controller. In contrast, input-output linearization controllers achieve close tracking of flux, speed, and position references for the most demanding trajectories.