| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-phase AC rotary machine which can adjust magnetic flux amount from a stator passing through a magnetic gap and a rotor, and which achieves high efficiency in any rotation region.SOLUTION: A stator 1 comprises: a main permanent magnet 14 and a main field coil 15 which are arranged opposite each other in a ring-shaped stator core 11; and six stator poles 12 which are arranged at an equal pitch. Stator coils 13 respectively wound around the stator poles 12 opposite each other are set to the same phase. Magnetic flux of the main permanent magnet 14 is not leaked from a magnetic gap between four rotor poles 22 arranged at an equal pitch and the stator poles 12 to pass through inside of the stator 1 in a de-energized state of the field coil. The magnetic flux of the main permanent magnet 14 can be changed to the magnetic flux passing through the magnetic gap and the rotor 2 by the magnetic flux of the main field coil 15 in an energized state of the field coil. |
