Analysis of start-up regimes of an induction motor controlled by a thyristor regulator

Ivanov, A. G.; Ushakov, I. I.

doi:10.3103/s1068371207100057

Cited by 2 publications

(2 citation statements)

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“…In term of engineering practice, Kloss formula is rather useful and convenient for determining the torque and speed relations of induction motors when a full detail of the motor equivalent parameters is not available. Only one of the required parameters like the break-down torque can be easily taken from the manufacturer catalog data, while the unknown break-down slip can be roughly evaluated from the given rated torque and rated speed of the motors (Buksnaitis, 2011;Emde et al, 2014;Ivanov and Ushakov, 2007;Kral et al, 2009). The Kloss formula is commonly used in different kinds of controls (Imecs, 2009;Jardan et al, 2011;Kodkin et al, 2014;Reljic et al, 2006;Shawinski, 2010;Vodovozov and Bakman, 2013) and analysis (Anass et al, 2009;Bollen, 1995;Das, 1990;Sumper et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Analytical determination of speed-torque and speed-current curves of single-cage induction motor under supply voltage and frequency variations

Aree

2018

COMPEL

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Purpose An important characteristic of most induction motors is speed- or slip-torque curve. A simplified Kloss formula is widely used for describing speed-torque characteristic because it is fairly simple. Only two parameters related to break-down torque and break-down slip are regarded as input parameters. Because this simplified formula ignores an unknown parameter that is a ratio between Thevenin’s and rotor resistances, an accurate torque curve characteristic may not be fully obtained over an entire speed range. Moreover, the conventional Kloss formula does not offer a speed-torque curve calculation when motor’s supply voltages and frequencies are deviated from rated values. Hence, the purpose of this paper is to present an extension of Kloss formula, which allows a more precise estimation of speed-torque and speed-current curves of single-cage three-phase induction motors over a wide range of speeds at different motor’s operating voltages, frequencies and rotor-circuit resistances. Design/methodology/approach The analytical approach is mainly used for determining all key parameters in the Kloss formula using a known set of data such as rated torque, starting torque, break-down torque and rated speed, in which they can be obtained from motor’s manufacturer. Findings The speed-torque and speed-current curves taken from laboratory measurements are compared with those from the calculations. Good agreements between them are fully observed. Originality/value This analytical approach is useful in providing an accurate speed-torque and speed-current curves required for most steady-state analysis.

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Section: Introductionmentioning

confidence: 99%

Analytical determination of speed-torque and speed-current curves of single-cage induction motor under supply voltage and frequency variations

Aree

2018

COMPEL

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“…The dynamic behavior of this commercial office building is concisely summarized and simplified as comprised of two different power levels with severe increase and decrease transients that each occur once per day. The time interval of this transition depends upon the specific characteristics of the air conditioning system and can vary from milliseconds for plain induction motors [32] to as long as 2-5 s for those with start-up control [33]. The faster transition time is selected in the present paper so that the techniques investigated can be applied to less severe systems.…”

Section: Dynamic Non-linear Loadmentioning

confidence: 99%

Load-following active power filter for a solid oxide fuel cell supported load

Auld

Smedley

Mueller

et al. 2010

Journal of Power Sources

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a b s t r a c tWhile the integration of base-load fuel cells into the built environment is expected to provide numerous benefits to the user, the steady-state and dynamic behavior of these stationary fuel cell systems can produce an undesirable impact on the grid distribution circuit at the point of connection. In the present paper, a load-following active power filter (LFAPF) is proposed to mitigate the grid impact of such systems and instead improve overall local power quality. To evaluate the strategy, the LFAPF is integrated into a SOFC system inverter with one-cycle control (OCC) to provide the fundamental benefits of a traditional active power filter (APF) while also damping out short-term line current transients. The LFAPF benefit is illustrated through simulation of an SOFC interconnected with the utility electric distribution system and a building electricity demand that is modeled as a dynamic non-linear load. Three installation cases are examined: (1) a load-following SOFC, (2) a base-loaded SOFC, and (3) an offline SOFC. Without LFAPF, the load-following SOFC causes load transients due to the finite SOFC response time, and the base-loaded SOFC case has transients that appear more severe because they represent a larger overall percentage of the grid-provided load. The integration of an LFAPF improves the steady-state behavior over the base case and mitigates voltage sags and step changes. Thus integrating an LFAPF can, by providing useful services to both the utility and the end-user, facilitate the integration of an SOFC into the distribution system.

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Analysis of start-up regimes of an induction motor controlled by a thyristor regulator

Cited by 2 publications

References 0 publications

Analytical determination of speed-torque and speed-current curves of single-cage induction motor under supply voltage and frequency variations

Analytical determination of speed-torque and speed-current curves of single-cage induction motor under supply voltage and frequency variations

Load-following active power filter for a solid oxide fuel cell supported load

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