German automotive supplier ZF has achieved significant advancements in electric motor technology with its magnet-free In-Rotor Inductive-Excited Synchronous Motor (I2SM) that integrates an inductive exciter within the rotor shaft, enabling the generation of a magnetic field.
This groundbreaking approach is claimed to deliver exceptional power and torque density, making it a promising alternative to the commonly used permanent magnet synchronous motors (PSMs) in electric vehicles.
By eliminating the need for minerals like dysprosium, neodymium, and terbium that are required in PSM motors, ZF’s I2SM design not only reduces production costs but also mitigates potential supply chain challenges while enhancing resource efficiency and sustainability. These minerals, known for being expensive and difficult to source, are no longer relied upon, allowing for a more streamlined and sustainable manufacturing process.
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