en Special Electric Machines Special Electric Machines Research Paper Research Paper <div style="text-align: justify;"><span style="font-family:Times New Roman;"><span style="font-size:14px;"><span style="color:#000000;">Over the past four decades of developing superconducting machines, many topologies have been suggested. The most successful topology of high-power superconducting (HPS) machines is an air-cored radial flux synchronous machine. There are two possible topologies for this type of machine, rotational field, and stationary field. In this paper, the relative advantages and disadvantages of these topologies are compared in detail. Analytical study of these topologies shows that the inversed machine topology leads to more efficient high-temperature superconductor (HTS) wire utilization and hence more economical production. In order to confirm the result obtained by analytical calculations, 2-D finite element model (FEM) of the machine is utilized.</span></span></span></div> Finite Element Model (FEM), Inversed Topology, Machine Design, Superconducting Machine. 33 39 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-2353-1&slc_lang=en&sid=1 S. Hasanzadeh hasanzadeh@qut.ac.ir 1800319475328460013417 0000000322729970 Yes Electrical and Computer Engineering, Qom University of Technology, Iran. M. Yazdanian m.yazdanian@gmail.com 1800319475328460013418 0000000258889930 No Electrical and Computer Engineering, Qom University of Technology, Iran. S. M. Salehi sm.salehi3@gmail.com 1800319475328460013419 0000000329730691 No Electrical and Computer Engineering, Qom University of Technology, Iran.