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@article{194556,
        author = {Pranit V. Patil},
        title = {An Adaptive Star-Delta Starting Method for Induction Motors Based on Real-Time Rotor Speed Measurement},
        journal = {International Journal of Innovative Research in Technology},
        year = {2026},
        volume = {12},
        number = {10},
        pages = {4298-4305},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=194556},
        abstract = {Three-phase induction motors are fundamental to industrial operations, yet their startup is characterized by high inrush currents that can cause voltage instability and stress on electrical infrastructure. While star-delta starters are commonly employed to mitigate this issue, conventional implementations rely on fixed timers for switching, which lack adaptability to varying load conditions. This paper presents the design and implementation of an intelligent, Arduino-based automatic star-delta starter that utilizes real-time speed feedback from an infrared (IR) sensor to determine the optimal transition point from star to delta configuration. The system integrates current and vibration sensors for continuous motor health monitoring, along with a GSM module for remote fault alerting and control. The proposed starter automatically engages the motor in star mode, limiting the starting current to 4.33A (compared to a theoretical 7.5A in delta). Upon detecting that the motor has reached approximately 80% of its rated speed (~1150 RPM) via the IR sensor, the microcontroller seamlessly switches the contactors to delta mode, allowing the motor to attain its full rated speed of 1440 RPM at 7.5A. Experimental results validate the system's reliability in providing a smooth, adaptive transition and its effectiveness in sending real-time SMS alerts during overcurrent or excessive vibration events. This cost-effective and automated solution offers significant improvements in motor protection, energy efficiency, and operational safety over traditional timer-based starters, making it highly suitable for modern industrial automation and IoT-enabled environments.},
        keywords = {Automatic Star-Delta Starter, Arduino Uno, Three-Phase Induction Motor, Real-Time Speed Feedback, IR Sensor, GSM Module, Fault Detection, Industrial Automation.},
        month = {March},
        }