Ferrstron says rare-earth-free motor reaches 98% efficiency and TRL 6

Ferrstron Powertrains says it has validated a 150 kW heavy-duty motor using ferrite magnets in a 2.3-ton vehicle, reaching Technology Readiness Level 6. The Pune-based company is now seeking new investment to move toward TRL 8 and production.

Why it matters: - Ferrstron Powertrains is targeting a long-standing constraint in heavy-duty electric propulsion: high efficiency and compact size without rare-earth magnets. - The company says its approach could affect electric trucks, buses, trains, marine propulsion, wind power generation and data center backup generation. - Ferrstron says the shift to ferrite magnets could reduce reliance on rare-earth materials that are more expensive and harder to source.

What happened: - Ferrstron said it achieved 98% efficiency in heavy-duty motors using ferrite magnets. - The Pune, Maharashtra, India-based company said it tested a physical prototype of its 150 kW, 400 Nm powertrain in a 2.3-ton multi-utility vehicle earlier this month. - Ferrstron said the on-road test validated full system integration in a real-world environment and lifted the technology to TRL 6. - The company said it is now discussing a new investment round to reach TRL 8 and begin production.

The details: - Ferrstron is developing electric powertrain technology for high-speed trains, marine vessels, heavy-duty trucks and buses, plus megawatt-scale power generation in direct-drive wind turbines and data center gensets. - The company said its motors use electromagnetic physics simulation as the basis for the design. - Ferrstron said the prototype pairs high power density with ferrite magnets, which are lower cost and more abundant than rare-earth magnets. - Founder Vishal Sharma said the technology combines magnetic-circuit architecture, element geometry and placement, winding with in-coil cooling, and a proprietary multi-phase flux control algorithm. - Sharma said the design work reflects hundreds of simulations, multiple physical prototypes and advanced testing over seven years. - Ferrstron said its roadmap uses stackable torque cartridges. - The 400 Nm cartridge is intended for passenger vehicles and light commercial vehicles, with single and double stacks supporting powertrains up to 800 Nm. - The 1,100 Nm cartridge is intended for medium- and heavy-duty trucks and buses and distributed traction high-speed trains, with up to five cartridges supporting 1,100 Nm to 5,500 Nm powertrains. - The 8,500 Nm cartridge is intended for electric and hybrid marine propulsion, high-speed onshore wind turbines and data center gensets, with up to 10 cartridges supporting motors and generators from 1 MW to 10 MW. - The 1,850 kNm cartridge is intended for offshore wind turbines, with up to 11 cartridges supporting 10 MW to 21 MW direct-drive wind generators.

Between the lines: - Ferrstron is positioning ferrite magnets as a practical alternative to rare-earth materials in applications that normally demand very high torque and compact size. - The TRL 6 milestone matters because it moves the technology beyond simulation and into integrated real-world testing. - The company is also signaling commercial ambition beyond automotive uses by framing the platform as scalable across transportation and energy systems. - Randolph Toom, head of global strategic partnerships, said ongoing talks with global Tier 1 suppliers and OEMs point to demand for eliminating rare-earth materials.

What's next: - Ferrstron said it is seeking investment to advance from TRL 6 to TRL 8. - The company said the next step is to start production after additional development and validation. - Ferrstron said its website is More information. - The company also shared its LinkedIn page and YouTube channel.

The bottom line: - Ferrstron is trying to prove that rare-earth-free motors can meet heavy-duty performance demands at commercial scale, and the latest vehicle test is its strongest validation so far.