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The main purpose of this paper is to design an extension robust speed controller for a switched reluctance motor (SRM) drive. First, a two-degree-of-freedom controller (2DOFC) for an ideal switched reluctance motor (SRM) drive at nominal case is designed. As the variations of system parameters and operations occur, a compensation signal is yielded by an extension robust controller (ERe) to preserve the prescribed speed control response. Effectiveness of the proposed controller is verified by some simulation results.