Methods for the control of large medium-voltage motors: application considerations and guidelines

Ellis, Robert; Seggewiss, J.G.; Paes, Richard; Kay, John

doi:10.1109/28.887223

Cited by 36 publications

(3 citation statements)

References 4 publications

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“…The first category involves methods that rely on the classic regulation of the supply voltage or practices using additional equipment [2,3]. The direct-on-line (DOL) method belongs to this category, in which it can be realized with or without the reduced voltage technique [4], the variable rotor resistance method [3], the shunting of the stator and rotor windings [4], the star-delta method [5,6] and the usage of auto-transformers [6,7]. The second category involves methods that rely on power electronics devices or soft starters [2].…”

Section: Introductionmentioning

confidence: 99%

“…Sci. 2021, 11, 5102 2 of 15 are comprehensively discussed in [7]. The most traditional method for IM starting is the DOL method [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…However, these methods require many machine data, including complete machine geometric data. Therefore, it is not a practical and hand-useful method, particularly for older machines [7][8][9]. Third, CVRST can be determined using an analytical solution of the speed-time characteristics curve.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Exact Analytical Solution Based on Kloss Equation towards Accurate Speed-Time Characteristics Modeling of Induction Machines during No-Load Direct Startups

et al. 2021

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The acceleration time of induction machines (IMs) is essential for proper protection-relay settings of the machine to prevent voltage sags in local power areas. In this paper, mathematical modeling of IMs’ speed-time characteristics during no-load direct startup has been presented. Unlike the approaches presented in the literature, the proposed approach includes the bearing losses, in which two expressions of the speed-time characteristics of IMs during no-load direct startup are derived. The first expression was derived based on the Kloss equation used for representing the torque, and the second expression was derived based on the torque expression determined from the Thevenin equivalent circuit of the machine. The derived expressions’ accuracy was validated using laboratory measurement and computer simulation approaches. The results obtained show a good agreement between the measured and simulated speed-time characteristics of two IMs. Finally, the proposed formulations can provide a simple analytical base to enable accurate IM modeling.

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