MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202641018201 A) filed by Vel Tech Multi Tech Dr Rangarajan Dr Sakunthala Engineering College; A. Aiagu Sundara Pandian; Dr. M. Selvam; Mithun Kumar R; Yumal Bruno A; and Vijay Prasanth S, Chennai, Tamil Nadu, on Feb. 18, for 'design and fabrication for enhancement of auto transformer performance through effective heat control.'
Inventor(s) include A. Aiagu Sundara Pandian; Dr. M. Selvam; Mithun Kumar R; Yumal Bruno A; and Vijay Prasanth S.
The application for the patent was published on April 17, under issue no. 16/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to the Enhancing the performance of an autotransformer through effective heat control requires an integrated design and fabrication approach that addresses thermal, electrical, and material considerations simultaneously. Unlike conventional two-winding transformers, an autotransformer shares a common winding between primary and secondary circuits, leading to high current density in specific sections of the coil. This concentrated current flow increases copper losses (PR losses), localized heating, and thermal stress, which can degrade insulation, reduce efficiency, and shorten operational life.The proposed design strategy focuses on optimizing thermal management at both the core and winding levels. High-grade magnetic core materials such as grain-oriented silicon steel are selected to minimize hysteresis and eddy current losses. Core lamination thickness and stacking factor are carefully engineered to reduce localized heat generation. In the winding design, conductor cross-sectional area is increased in high-current regions to lower resistance, while multi-strand or transposed conductors are used to reduce skin and proximity effects at higher frequencies. Thermal enhancement techniques include improved insulation systems with higher thermal class ratings, the use of thermally conductive but electrically insulating materials, and strategic placement of cooling ducts within the winding structure. For oil-cooled systems, optimized oil flow channels and radiator surface area are incorporated to ensure uniform heat dissipation. In air-cooled designs, finned enclosures, forced-air ventilation, and heat sinks are integrated into the fabrication layout."
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