Abstract
The speed sensorless control for the LIM drives could reduce the cost and improve the reliability, which have attracted many attentions of researchers. In this chapter, an improved systematic approach for speed estimation and controller design of LIM drives is proposed. The speed estimation method based on the extended state observer (ESO) is developed to improve the dynamic speed estimation response. In contrast to the conventional proportional-integral speed adaptive mechanism based only on the LIM electromagnetic model, this new speed estimation method incorporates both the electromagnetic and mechanical models such that it can estimate the LIM speed and load resistance at the same time. A new speed controller incorporating the disturbance observer based control (DOBC) algorithm is developed to strengthen the speed tracking ability and suppress the disturbance of load variation. Having fewer parameters, it brings great convenience to the drive system parameter setting and tuning. The performance of the proposed method is numerically simulated and experimentally verified.
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Dian, R., Xu, W., Liu, Y. (2019). Speed Sensorless Control Strategy for LIM Based on Extended State Observer. In: Xu, W., Islam, M., Pucci, M. (eds) Advanced Linear Machines and Drive Systems. Springer, Singapore. https://doi.org/10.1007/978-981-13-9616-8_5
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DOI: https://doi.org/10.1007/978-981-13-9616-8_5
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