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Dynamic emulation of mechanical loads using a vector-controlled induction motor-generator set

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3 Author(s)
Akpolat, Z.H. ; Dept. of Electr. & Electron. Eng., Nottingham Univ., UK ; Asher, G.M. ; Clare, J.C.

This paper addresses the problem of electronic emulation of both linear and nonlinear mechanical loads using a vector-controlled induction machine dynamometer. It is shown that a basic emulation scheme where the dynamometer torque demand is derived from the inverse dynamics of the emulated load is not generally viable, especially if the emulated load is part of a closed-loop speed control system. A new feedforward speed-tracking control scheme for the dynamometer is presented, which preserves the load dynamics and allows for emulation of a large class of nonlinear loads. An experimental rig is described using vector-controlled induction machines as the drive motor and dynamometer, and experimental results showing excellent emulation of both linear and nonlinear load dynamics are presented

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Industrial Electronics, IEEE Transactions on  (Volume:46 ,  Issue: 2 )