Let F2,d denote the free class-2-nilpotent group on d generators. We compute the normal zeta functions ζ F2,d(s), prove that they satisfy local functional equations and determine their abscissae of convergence and pole orders.

Wind Energy Conversion Systems (WECS) have become a focal point in the research of renewable energy sources. This paper provides then a comparative study of past and present generator technologies used in WECS. This study is based on an exhaustive review of the state of the art and on an effective comparison of the performances of the four main topologies that are permanent magnet generators, s...

This paper studies the electromechanical characteristics of synchronous generators under dynamic stator interturn short circuit (DSISC). First, air gap magnetic flux density (MFD) generator normal and DSISC fault was obtained. Then, expression for phase current electromagnetic torque (EMT) were After this, EMT analyzed by finite element analysis (FEA). Finally, measured CS-5 different condition...

This paper presents a practical thermal model of synchronous generator for high-power applications. couples the lumped parameter network and coolant together to utilize impact coolant’s temperature rising over machine. Furthermore, advanced multi-planes technique provides more precise higher resolution distribution various machine sections. Therefore, machines are divided into five planes; thre...