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The paper describes a new form of tubular induction motor, in which the motion of the rotor conductor is along a helical path. The winding arrangement described may include multi-polar system circumferentially and axially. The excitation produced by such winding is a helically travelling wave. An appropriate multi-layer analysis using cylindrical geometry is presented. Experimental and theoretical results are given and they show good correlation.
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Alwash et al. (2003) studied this question.
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