ZF's 30,000rpm drive halves magnet mass, cuts size by a quarter

ZF says its High Revolution Drive cuts electric drive unit size and weight by almost 25% and halves magnet mass against a comparable 18,000rpm system. The unit spins its motor at up to 30,000rpm and is slated for production by 2030, targeting high-volume passenger cars.

The supplier, a tier-1 (direct OEM supplier) based in Friedrichshafen, built the system as a variant of its existing Select e-drive platform. Faster rotation lowers the torque a motor must produce for a given output, and because torque tracks rotor volume, the motor shrinks.

A two-stage spur gearbox (a gear pair that trades speed for wheel torque) with a roughly 18:1 ratio restores torque at the axle. The configuration shown peaks at 200kW and 3,500Nm.

Why does magnet mass matter?

Halving the magnet content cuts cost and reduces dependence on critical supply chains — a growing concern for drive suppliers as rare-earth sourcing tightens. ZF claims energy conversion efficiency holds at nearly 93% despite the added speed and gearing, level with the Select equivalent. The lighter unit should also add driving range.

High speed brings its own problems. Noise, vibration and durability get harder to control as rpm climbs.

"Robustness and low noise and vibration levels were stringent development targets from the outset," said Thomas Meiser, Head of ZF's E-Mobility Business Unit. "To achieve this, we considered the electric motor, gearing, bearings and tooth geometry as an integrated system."

Meiser added: "For the configuration presented, 30,000 rpm is the economic and technical sweet spot."

What does this change for automakers?

The range spans roughly 150kW to 200kW and scales across both 400V and 800V electrical architectures. Because the drive reuses Select platform technology, ZF says development timelines for vehicle makers shorten. Several automakers are already in talks with the supplier, though no production awards are confirmed.

The claims remain supplier announcements. Production timing, magnet savings and efficiency figures all await verification against series production data closer to the 2030 window.

What to watch next: named OEM contracts, a confirmed production plant and launch date, and whether the near-93% efficiency holds in validated series hardware.