Redefining Motor Efficiency: The Case Against Rare-Earth Magnets
Rare-earth magnets have long been treated as the price of admission for a compact, efficient traction motor, but that assumption is exactly what a system-level design approach challenges. The following sections trace how magnetless synchronous motors work, where their electrically excited rotors create new engineering burdens, and how those burdens are resolved not by any […]
Moving Beyond Rare-Earth Limitations in Electric Motors
Rare-earth permanent magnets have become the default assumption in EV motor design, but that default carries costs that go beyond the magnets themselves: volatile pricing, a concentrated supply chain and a heavy extraction footprint. The usual response is to accept those costs because removing the magnets is assumed to cost performance. This piece works through […]
Overcoming the Challenges of Rare-Earth-Free Electric Motors
Electric motor design keeps running into the same wall: the rare-earth permanent magnets that made EV motors efficient and compact also tie the whole industry to a volatile, geographically concentrated supply chain with a heavy extraction footprint. That dependence is treated as an acceptable cost of performance, but it doesn’t have to be. This piece […]