Siemens Energy has been granted a patent for a multiplayer neutral bus system with multiple conductive layers and bushings creating separate electrical flow paths. The arrangement allows for the creation of a magnetic field and three current flow paths. The system includes three bushings, forming a closed conductive loop. GlobalData’s report on Siemens Energy 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 Siemens Energy, Ceramic composite hollow blades was a key innovation area identified from patents. Siemens Energy's grant share as of January 2024 was 54%. Grant share is based on the ratio of number of grants to total number of patents.

Multilayer neutral bus arrangement with three bushings

Source: United States Patent and Trademark Office (USPTO). Credit: Siemens Energy AG

A recently granted patent (Publication Number: US11855515B2) discloses a multilayer neutral bus arrangement designed to efficiently distribute current between conducting layer elements to reduce heat loss without increasing the footprint. The arrangement includes a first conducting layer element, a second conducting layer element, and a plurality of bushings electrically connected to each other via the neutral bus arrangement. The magnetic field created between the conducting layer elements enables the distribution of current, with three bushings facilitating the connection between the conducting layer elements.

Furthermore, the patent details the configuration of the multilayer neutral bus arrangement, where the gap between the conducting layer elements and the use of insulative materials contribute to the electrical insulation of certain bushings. The arrangement is particularly suitable for use in a 3-phase electrical machine, such as a generator, where each lead is connected to one of the bushings to reduce heat losses. Additionally, a method is outlined for connecting an electrical machine to the multilayer neutral bus arrangement, emphasizing the importance of distributing current effectively to minimize heat loss during operation.

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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.