Patent ID: 6130492
Filing Date: 2000-10-10
Classification: H02K

Abstract:
A brushless three-phase synchronous generator which comprises a stator including primary generating windings and stator excitation windings having a number of poles that is an odd-number times the number of poles of said primary generating windings, and a rotor including a cylindrical field system which is magnetically coupled with said primary generating windings, said rotor having a pre-established residual magnetism, said synchronous generator comprising:a plurality of field windings wound on said cylindrical field system in a full-pitch winding form and having a same number of poles as that of said primary generating windings;circulating means each connected in parallel to each of central field windings among said plurality of field windings, said central field windings each forming a primary field magnetic flux based on odd-order spatial higher harmonic magnetic fields produced by said stator excitation windings; andrectifier means connected in series with a plurality of predetermined field windings other than said central field windings among said plurality of field windings, in said plurality of predetermined field windings, voltages of a same phase being induced which voltages have predetermined different phase with respect to the phase of voltage induced in said central field windings based on said odd-order spatial higher harmonic magnetic fields,wherein series circuits of said predetermined field windings and rectifier means are respectively connected in parallel with said central field windings.