E-Motor Without Rare Earth Magnets and Copper

Electric Motors E-Motor Without Rare Earth Magnets and Copper

2026-01-27 From Thomas Günnel | Translated by AI 1 min Reading Time

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Advanced Electric Machines has signed two development contracts with automotive companies. This involves an electric motor without rare earth magnets or copper coils.

AEM boss James Widmer with the SSRD engine.(Image: Advanced Electric Machines) — AEM boss James Widmer with the SSRD engine.
(Image: Advanced Electric Machines)

The British company Advanced Electric Machines, AEM, has completed two development contracts for electric motors without rare earths and copper. One development order in the seven-figure range comes from a Tier 1 supplier to the automotive industry. AEM is not disclosing the name. The company also concluded a contract "with a major Asian car manufacturer". Both contracts relate to electric motors for passenger cars.

AEM Shows Prototype of an SSRD Motor

AEM has already presented a prototype of a so-called SSRD motor - Super Speed Reluctance Drive - for electric cars. The company now wants to further develop the motor for use in large-scale production.

What is different? Conventional permanent magnet motors require neodymium, dysprosium and other critical raw materials to function. According to the manufacturer, the SSRD motor achieves or exceeds the performance level of permanent magnet motors - without permanent magnets. The motor is also fully recyclable.

The SSRD motor from AEM has a maximum output of 308 kilowatts.(Image: Advanced Electric Machines) — The SSRD motor from AEM has a maximum output of 308 kilowatts.
(Image: Advanced Electric Machines)

According to AEM, the engine operates stably at speeds of up to 30,000 rpm. According to the company, the consumption values in the WLTP driving cycle are very good. According to AEM, the engine has a maximum output of 308 kilowatts. The continuous output is 138 kilowatts. A maximum of 378 newton meters is available. The engine weighs 10.4 kilograms (~23 Pounds) and is cooled with a mixture of water and glycol.

Aluminum Instead of Copper in the Winding

At the same time, AEM is testing the replacement of copper windings with compacted aluminum for a "major Asian car manufacturer". According to AEM, electric motors with aluminum instead of copper work more efficiently. At the end of their life cycle, they are also easier to recycle - because aluminum and steel components can be cleanly separated from each other.

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