{"title":"Brushless Wound Field Synchronous Generator Design With an Optical Power Transfer","authors":"Kangbeen Lee;Hyunwoo Kim;Woongkul Lee","doi":"10.1109/TMAG.2025.3563114","DOIUrl":null,"url":null,"abstract":"Rare-Earth permanent magnet-based generators offer high power density, but face challenges due to their inability to deactivate the magnetic field during failures. Wound field synchronous generators (WFSGs) have gained attention as a solution to these issues, but mechanical brushes negatively impact reliability. To address this, wireless power transfer (WPT)-based WFSGs have been proposed for their enhanced reliability, though they require low airgap passive components that hinder high-speed operation. This article presents the design and optimization of optical power transfer (OPT)-based WFSGs using photovoltaic (PV) cell excitation. The design constraints were calculated considering PV cell characteristics at maximum power point (MPP), and a finite element analysis (FEA) was conducted to analyze the characteristics of the OPT-based WFSG. Three cases were analyzed: constant optical power, constant output power, and high-speed operation. The optimal WFSG designs for efficiency and power density are identified by analyzing core and copper losses, which are calculated based on the WFSG designs and their respective design constraints. Furthermore, a feasibility study on high-speed operation explores the relationship between optical power and speed for maintaining consistent output power.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-5"},"PeriodicalIF":1.9000,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Magnetics","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10973797/","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Rare-Earth permanent magnet-based generators offer high power density, but face challenges due to their inability to deactivate the magnetic field during failures. Wound field synchronous generators (WFSGs) have gained attention as a solution to these issues, but mechanical brushes negatively impact reliability. To address this, wireless power transfer (WPT)-based WFSGs have been proposed for their enhanced reliability, though they require low airgap passive components that hinder high-speed operation. This article presents the design and optimization of optical power transfer (OPT)-based WFSGs using photovoltaic (PV) cell excitation. The design constraints were calculated considering PV cell characteristics at maximum power point (MPP), and a finite element analysis (FEA) was conducted to analyze the characteristics of the OPT-based WFSG. Three cases were analyzed: constant optical power, constant output power, and high-speed operation. The optimal WFSG designs for efficiency and power density are identified by analyzing core and copper losses, which are calculated based on the WFSG designs and their respective design constraints. Furthermore, a feasibility study on high-speed operation explores the relationship between optical power and speed for maintaining consistent output power.
期刊介绍:
Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The IEEE Transactions on Magnetics publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.