METHOD FOR ANALYZING AN ELECTROMAGNETIC FIELD OF A ROTATING MACHINE AND DEVICE FOR ANALYZING AN ELECTROMAGNETIC FIELD

摘要

An analyzing method comprising analyzing an electromagnetic field in the entire analysis space to determine a boundary field between a stator space and a rotor space, mode-developing the determined boundary field in the direction of rotation, transforming into rotating magnetic field components a mode from which the cyclic pulsating components of the magnetic circuit system between the stator and the rotor has been removed, modulating the transformed rotating magnetic field components with the pulsating components to obtain modulated rotating magnetic field components, allocating the modulated rotating magnetic field components as boundary conditions to the boundary between the stator and rotor spaces to analyze the electromagnetic fields in the stator and rotor spaces independently of each other, returning to the entire analysis space regarding an approximated vortex current as a coil current, and repeating the above analyzing steps. This method allows analysis of electromagnetic field of a rotating machine such as a generator or a motor at faster speed than conventional.