The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2024
Filed:
Aug. 22, 2023
Hitachi Energy Ltd, Zürich, CH;
Kiran Chandra Sahu, Västerås, SE;
Anders Daneryd, Västerås, SE;
HITACHI ENERGY LTD, Zürich, CH;
Abstract
A winding for a phase winding of a transformer. The winding has coil turns around a coil axis. The winding is adapted to transform voltage in a transformer at a predetermined frequency, when the transformer is operating. The winding is excited by a mechanical load having a main frequency corresponding to the predetermined frequency multiplied by two and has vibration modes. The combination of load and vibration modes results in a vibration of the winding. The winding has a set of vibration modes. Each vibration mode has a vibration mode frequency, wherein a main contributing vibration mode of the set of vibration modes is the vibration mode resulting in the largest acoustic power of the vibration modes. The winding is excited by the load and a stiffness difference between a first winding portion stiffness and a second winding portion stiffness is such that the acoustic power is minimized at said main frequency.