Dana has patented a system for cooling electric motors using a closed-loop coolant pathway. The method involves feeding coolant through a rotating rotor shaft, flowing it outward, directing it through axial holes, and finally exiting through an output-end balance plate. This innovation enhances motor efficiency and longevity. GlobalData’s report on Dana gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Dana, Differential gear shafts was a key innovation area identified from patents. Dana's grant share as of February 2024 was 56%. Grant share is based on the ratio of number of grants to total number of patents.
Cooling system for electric motor with closed-loop coolant pathway
A recently granted patent (Publication Number: US11923754B2) discloses a method for cooling an electric motor by efficiently circulating coolant through a series of components within the motor. The method involves feeding coolant through the center of a rotating rotor shaft, flowing it outward from the rotor shaft, directing it towards axial holes in the rotor, and finally channeling it through an output-end balance plate before exiting the motor housing. The coolant can be fed through the rotor shaft via a pump or a passive catch system, and it flows out of the rotor shaft through lateral holes.
Furthermore, the patent details the specific design elements within the electric motor, such as encoder-end balance plates, output-end balance plates, and various pathways for coolant flow. The method includes the use of a water glycol solution as coolant, with the inner surface of the axial holes lined with a dielectric liner for enhanced performance. Additionally, the closed-loop oil pathway within the motor ensures efficient cooling by circulating coolant through specific channels and regions within the motor components. Overall, the patented method offers a comprehensive approach to cooling electric motors, ensuring optimal performance and longevity through effective thermal management strategies.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
