MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202621044595 A) filed by Indian Institute Of Technology Bombay on April 07, 2026, for Improved Rare-Earth-Free Synchronous Reluctance Motor With Asymmetric Magnet Configuration And Fractional Slot Distributed Winding.
Inventors include Swasti Rani Chakrabarty; and Baylon G. Fernandes.
The application for the patent was published on June 26, 2026, under issue no. 26/2026.
Abstract: Embodiments herein disclose a motor (100) for voltage-constrained electric two-wheeler traction applications. The motor includes a stator (102) having a fractional-slot distributed winding (118) configured to shape an air-gap Magnetomotive Force (MMF) and reduce voltage distortion during field-weakening operation. The rotor (110) includes flux barriers (112) incorporating ferrite magnets arranged to limit local demagnetizing fields, particularly in regions susceptible to irreversible demagnetization under high-speed and peak-load conditions. The configuration of the stator winding and rotor magnet arrangement enables improved torque capability and power factor while reducing terminal-voltage harmonic content without increasing magnet volume or using rare-earth materials. The rotor structure provides enhanced magnet robustness and reliable operation over an extended speed range within constrained DC-link voltage conditions. The proposed motor exhibits improved electromagnetic performance, reduced demagnetization risk, and lower active material usage, making it suitable for compact, cost-sensitive electric two-wheeler traction systems and other voltage-limited electric drive applications. FIG. 1b
Disclaimer: Curated by HT Syndication.
