|Autors: Stancheva, R. D., Iatcheva, I. I.|
Title: Dynamic behaviour investigation of electromagnetic force densities
Keywords: electromagnetic forces; end region of turbine-generator; finite element method
Abstract: The present paper deals with the electromagnetic forces due to the rotatory magnetic field in an alternating current machine. The time dependent pulsations of the elliptic force density field are investigated. Applying the method of Maxwell stress the distribution of the electromagnetic force densities is studied in theoretical aspect at first. A factor is defined for a numerical valuation of dynamic force density behaviour in a period. As a numerical example the electromagnetic force density field is considered in the end region of 200 MW turbine-generator. The calculations are made using FEM. On the basis of the defined factor the dynamic loads rate is estimated and the relevant conclusions are drawn with respect to the critical regimes and the critically loaded parts of the device. It is shown that the approach based on the local electromagnetic forces studying could to be used in detailed analysis and computer aided design.
1. Tang, G.-J., Jiang, H.-C., He, Y.-L., Meng, Q.-F. Electromagnetic Forces and Mechanical Responses of Stator Windings before and after Rotor Interturn Short Circuit in Synchronous Generators (2020) Mathematical Problems in Engineering, 2020, art. no. 5892312, . https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099310360&doi=10.1155%2f2020%2f5892312&partnerID=40&md5=a740f2c441e55537f382f07fe555a76a DOI: 10.1155/2020/5892312 ISSN: 1024123X - 2020 - в издания, индексирани в Scopus или Web of Science
Вид: статия в списание, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus и Web of Science