Kreisläufer: Designing Motors for the Second Life of Magnets Via German Collaboration Led by RWTH Aachen

Highlights

• German research project Kreisläufer aims to redesign EV rotors for easier end-of-life dismantling and materials recovery.
• Project seeks to standardize motor recycling processes and reduce dependency on Chinese rare earth processing.
• Potential breakthrough in creating sustainable supply chains for electric vehicle motor components by early to mid-2030s.

---

RWTH Aachen’s (opens in a new tab) Production Engineering of E-Mobility Components (PEM) has launched “Kreisläufer,” a multi-year project to redesign EV motors—specifically rotors—for easy end-of-life dismantling and materials recovery (neodymium magnets, copper, laminations). The work is presented as funded by Germany’s Ministry for Economic Affairs and Energy (opens in a new tab) and runs through August 2028, with partners Magnet-Physik Dr. Steingroever (opens in a new tab), Remondis (opens in a new tab), and Wieland eTraction Systems (opens in a new tab); Daimler Truck (opens in a new tab) and Mubea Motorkomponenten (opens in a new tab) join as associates. A “digital product passport” for disassembly/recycling is planned. These specifics match PEM and trade-press disclosures.

The Promise vs. the Payoff

PEM signals an industrial-scale rotor-recycling window 3–5 years after project end, implying commercialization in the early-to-mid 2030s. Technically plausible, but economics and adoption are the gating factors: collection flows, contamination, magnet grade heterogeneity, and downstream rare-earth separation/refining capacity in Europe remain constraints. Prior German work (e.g., ZIRKEL with Fraunhofer IWU) did yield practical magnet-recovery methods (mechanical removal, hydraulic-press extraction), yet scaling those methods into profitable, high-throughput lines has been the historical challenge.

The Quiet Risks (and Why Investors Should Care)

The project is correctly framed as design-for-recycling—a gap in today’s motor architectures. But even perfect dismantling still needs non-Chinese refining/separation and EU magnet manufacturing to close the loop. Europe’s build-out is underway but incomplete; without synchronized mid-stream capacity, recovered magnets/oxides can drift back to Chinese processors, muting strategic benefits. That context is underplayed in announcement-style coverage.

Spot the Spin

After a Rare Earth Exchanges (REEx) review, a couple of areas lean promotional: (1) the self-sufficiency narrative for Germany’s e-drive supply chains, and (2) the speed of potential scaling. Both hinge on policy continuity, capex, product-passport standardization, OEM design uptake, and recyclate quality meeting motor-grade specs. None are guaranteed on the stated timeline. Still, the pivot from battery-only recycling to motor/rotor design is a meaningful shift that can shave primary NdFeB demand at the margin and hedge supply shocks.

Why This Matters for the REE Chain

If Kreisläufer drives standardization (fasteners, adhesives, magnet geometry, labeling), it can lower recovery frictions and create bankable feedstock for EU magnet plants, nudging ROI for regional projects. Watch for: pilot dismantling KPIs, partnerships with EU refiners/magnetizers, and whether the product-passport data becomes an industry norm.

Citation: Electrivé (EN/DE) coverage and PEM RWTH Aachen project pages, Sept. 10, 2025; project and partner details as disclosed by PEM.

©!-- /wp:paragraph -->