MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202541125500 A) filed by Manipal Academy Of Higher Education, Manipal, Karnataka, on Dec. 11, 2025, for 'linear induction motor incorporating a top-slot metallic back-iron structure for hyperloop applications and method thereof.'
Inventor(s) include Dhairya Kumar Berry; Prabhav Rajeev Nambiar; and Prabhanjana P.
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 invention relates to a linear induction motor based electromagnetic propulsion system (100) for Hyperloop transportation. The system comprises a laminated M-45 electrical steel stator core (201) integrated with a top-slot metallic back-iron insert (219) configured to enhance magnetic flux return, reduce leakage, and provide coil-retaining support. An electromagnetic coil assembly (203) with copper windings distributed across twenty-four slots generates a travelling magnetic field when energised by a three-phase alternating current regulated through a pulse-width modulation inverter. A controlled air gap of about seven millimetres is maintained between the stator and a conductive aluminium or copper track (215) to optimise electromagnetic coupling. The configuration achieves an average magnetic flux density of approximately 0.8 Tesla and a linear thrust of around 175 newtons without external cooling. The system ensures efficient, contactless, and stable propulsion suitable for scalable and energy-efficient Hyperloop applications."
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