Horse Powertrain has unveiled a hybrid transmission motor using amorphous steel alloy stator laminations just 0.025mm thick. The design reduces stator iron losses by 50%, achieves 98.2% efficiency and delivers 140kW peak power at 360Nm torque.
Horse Powertrain has unveiled a hybrid transmission motor built with an amorphous steel alloy stator that the London, UK-based company says achieves 98.2% efficiency and cuts stator iron energy losses by half compared to equivalent designs.
The motor, which the company calls the Amorphous Motor, delivers peak power of 140kW and 360Nm of torque. Horse Powertrain says the efficiency gains translate to a 1% reduction in whole-vehicle fuel and power consumption when integrated into hybrid powertrains.
The technology centers on the use of amorphous steel – a steel alloy with high durability, strength and magnetic permeability – for the motor’s stator block. The material allows the lamination layers within the stator to be manufactured at just 0.025mm thick, one tenth the thickness of steel used in conventional motor designs. That reduction in lamination thickness is what drives the 50% cut in stator iron losses, according to the company.
The motor was first shown at IAA Summit 2025 and is targeted at range-extended electric vehicles (EVs), hybrids and plug-in hybrids.
“This latest innovation demonstrates Horse Powertrain’s continued commitment to research and development, providing suppliers and OEMs with the tools to raise the bar when it comes to fuel economy and emissions performance,” says Ingo Scholten, deputy chief technology officer at Horse Powertrain. “The Amorphous Motor is an ideal tool to power a new generation of high-efficiency range extended EVs, hybrids, and plug-in hybrids, ensuring these technologies continue to play a substantial role in automotive’s decarbonization journey.”
Horse Powertrain operates 17 manufacturing plants, five R&D centers and employs 19,000 people globally.
