Tau Unveils Software-Defined Motor Without Rare-Earth Magnets

Tau Motors showcased Gamma, a software-defined electric motor that removes rare-earth magnets while delivering high efficiency and improved torque and power.
Built on a stack of advanced power electronics, controls, and hardware design, Gamma optimizes each operating point rather than relying on fixed hardware tradeoffs, producing a performance envelope the company says exceeds conventional permanent-magnet machines.
The design targets lower system cost and greater supply-chain resiliency by eliminating dependence on neodymium and other rare earths — materials whose mining and processing carry significant environmental and geopolitical risks.
Gamma also offers increased power density without larger packaging, on-demand boost capability, enhanced diagnostics to reduce failure modes, and a reduced CO2 footprint.
Tau presented third-party validation of Gamma’s physics and performance at Columbia University’s Center for Advanced Electrification during Climate Week; presentations were given by CEO Wesley Pennington and Dr. Matthias Preindl, who discussed analysis from MPlab and the CCAE.
Tau is working with commercial partners across automotive and industrial sectors and plans further product details in early 2026.