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<p>This paper presents an analysis of the starting behavior of an induction motor under asymmetrical voltage supply conditions. An analytical expression describing the time (<i>t</i>) – speed (<i>n</i>) relationship during start-up is derived, and by applying the Newton’s method, the corresponding <i>n</i>-<i>t</i> characteristic is obtained. The resulting formulation provides a practical tool for accurately assessing start-up behavior under voltage asymmetry, with reduced computational effort. The results are validated through Simulink simulation, Typhoon HIL simulation, and laboratory measurements on a real induction machine. It is shown that an increase in asymmetry significantly affects the machine’s starting time. This study provides insight into the effects of supply asymmetry on motor start-up performance, highlighting its practical significance, as such conditions frequently occur due to load imbalance or phase interruption.</p>

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Induction motor no-load start-up invertible speed–time characteristic under asymmetrical voltage supply

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Vasilije Tomić,
  • Martin Ćalasan,
  • Mihailo Micev,
  • Ilija Knežević

摘要

This paper presents an analysis of the starting behavior of an induction motor under asymmetrical voltage supply conditions. An analytical expression describing the time (t) – speed (n) relationship during start-up is derived, and by applying the Newton’s method, the corresponding n-t characteristic is obtained. The resulting formulation provides a practical tool for accurately assessing start-up behavior under voltage asymmetry, with reduced computational effort. The results are validated through Simulink simulation, Typhoon HIL simulation, and laboratory measurements on a real induction machine. It is shown that an increase in asymmetry significantly affects the machine’s starting time. This study provides insight into the effects of supply asymmetry on motor start-up performance, highlighting its practical significance, as such conditions frequently occur due to load imbalance or phase interruption.