American Axle & Manufacturing has been granted a patent for a motor drive system featuring a unique rotor assembly insert design. The system includes a rotor shaft with a central hole and slots for fluid passage, enhancing cooling efficiency. GlobalData’s report on American Axle & Manufacturing 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 American Axle & Manufacturing, was a key innovation area identified from patents. American Axle & Manufacturing's grant share as of February 2024 was 65%. Grant share is based on the ratio of number of grants to total number of patents.
Motor drive system with rotor assembly having insert for cooling
A recently granted patent (Publication Number: US11888356B2) discloses a motor drive system that includes an electric motor with a unique rotor assembly. The rotor assembly comprises a rotor shaft with a single fin set, where the fin members are fixedly coupled to a hub and extend radially outwardly to define an outer circumferential surface. The single fin set is received into a bore in the rotor shaft, engaging the inner circumferential surface to create longitudinally extending slots. These slots, along with a central hole in the hub, form fluid passages for transmitting cooling fluid through the fin set in opposite directions along the rotational axis.
Furthermore, the patent details the specific configurations of the fin set and fluid passages, including the shrink-fit engagement of the fin members with the inner circumferential surface, the uniform circumferential width of the second fluid passages, and the void spaces within the slots. The patent also highlights the material composition of the single fin set, which is formed of a compacted, sintered powdered metal material. Overall, the motor drive system described in the patent aims to enhance cooling efficiency and optimize the design of the rotor assembly for improved performance in electric motors.
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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.
