Initial Speed Estimation Method for Induction Motors Using Regression Analysis and Self-Excited Vibration Phenomenon

Hiroto Kominami; Yoshitaka Iwaji; Naoki Kunihiro; Kazuma Okuda; Takashi Kaneko

doi:10.1541/ieejjia.25000676

This article has now been updated. Please use the final version.

Initial Speed Estimation Method for Induction Motors Using Regression Analysis and Self-Excited Vibration Phenomenon

Hiroto Kominami, Yoshitaka Iwaji, Naoki Kunihiro, Kazuma Okuda, Takashi Kaneko

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Keywords: Speed sensorless control, Induction motor, Electrical rolling stock traction, Free-run restart

JOURNAL FREE ACCESS Advance online publication

Article ID: 25000676

DOI https://doi.org/10.1541/ieejjia.25000676

The final version of this article is now available: Vol. 14 (2025), No. 6 pp. 970-976

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Abstract

Induction motor drive systems without rotation speed sensors are already being used in many products. In recent years, the efficiency of induction motors has increased, with the secondary time constant tending to become longer. This paper investigates a new restart method that enables a short startup time for such high-efficiency induction motors. The validity of the new method was verified by experiments using a high-efficiency induction motor.

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