Magnetic field analysis method and programs for rotating machines

A computer program stored on a computer readable storage medium for making a computer execute a magnetic field analysis method for a rotating machine comprising:

• a first process of receiving, as initial values, a value of a magnetic field distribution in a stator space and a value of the magnetic field distribution in a rotor space;
• a second process of calculating the magnetic field distribution in a whole analysis space by using said initial values;
• and
• outputting the magnetic field distribution.

A magnetic field analysis method for a rotating machine comprising:

• a process of deriving constant components and rotation fundamental mode components from a magnetic field distribution on a slide plane between a rotor and a stator obtained at a predetermined time;
• a process of separating a whole analysis space into a stator space and a rotor space;
• a process of rotating a rotation fundamental mode by a rotation angle of a rotation magnetic field corresponding to a time-step width and performing a magnetic field analysis in the stator space by using a rotation result added with the constant components as boundary conditions of the slide plane;
• and
• a process of performing a magnetic field analysis in the whole analysis space by using, as initial values, a magnetic field distribution obtained in the stator space and the magnetic field distribution in the rotor space already obtained at the predetermined time and obtaining a magnetic field distribution at a time lapsed by the time-step width from the predetermined time.

A magnetic field analysis method for a rotating machine comprising:

• a process of deriving constant components and rotation fundamental mode components from a magnetic field distribution on a slide plane between a rotor and a stator obtained at a predetermined time;
• a process of separating a whole analysis space into a stator space and a rotor space;
• a process of rotating a rotation fundamental mode by a rotation angle smaller than a rotation angle of a rotation magnetic field corresponding to a time-step width and performing a magnetic field analysis in the stator space by using a rotation result of the rotation fundamental mode added with the constant components as boundary conditions of the slide plane;
• a process of rotating the rotation fundamental mode by a rotation angle smaller than an angle obtained by subtracting a rotation angle of the rotor from the rotation angle of the rotation magnetic field corresponding to the time-step and performing a magnetic field analysis in the rotor space by using a rotation result of the rotation fundamental mode added with the constant components as boundary conditions of the slide plane;
• a process of obtaining a magnetic field distribution in the stator space and a magnetic field distribution in the rotor space, respectively at a time lapsed by the time-step width from the predetermined time, from the magnetic field distribution in the stator space and the magnetic field distribution in the rotor space;
• and
• a process of performing a magnetic field analysis in the whole analysis space by using, as initial values, the magnetic field distributions in the stator space and in the rotor space obtained at the time lapsed by the time-step width and obtaining a magnetic field distribution in the whole analysis space at the time lapsed by the time-step width from the predetermined time.