Dynamic emulation of mechanical loads using a vector-controlledinduction motor-generator set |
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Authors: | Hakan Akpolat Z Asher GM Clare JC |
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Affiliation: | Dept. of Electr. & Electron. Eng., Nottingham Univ.; |
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Abstract: | 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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