UK-based electric motor manufacturer Advanced Electric Machines (AEM) has introduced its second-generation HDRM300C motor, featuring compressed coil technology that promises improved power density and efficiency over conventional wire designs.
The HDRM300C incorporates plug-in connectors instead of gland fittings and strengthened internal components. AEM has also enhanced the motor’s cooling system, allowing commercial vehicles to operate longer without overheating. The company claims the new design achieves conductor slot fill rates exceeding 80%, compared to less than 60% for traditional wire layouts.
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“By combining our patented coil compression technology with enhanced thermal management and improved speed capabilities, we’re delivering a motor that sets new benchmarks for efficiency and performance,” said AEM CEO James Widmer. “For the transportation industry, it means more capable electric vehicles that are more cost-effective to operate and maintain.”
AEM will provide samples of the HDRM300C this month, with full-scale production set for the fourth quarter of 2025. The motor builds on the company’s earlier HDRM150, the first to feature its coil compression method, which eliminates gaps and air pockets to boost power output without increasing size or weight.
