| 摘要 |
PROBLEM TO BE SOLVED: To apply a small amount of permanent magnet, to miniaturize an electric machine, and to obtain high output arranging a permanent magnet on the side surface of a rotor core projection part, suppressing a magnetic flux being leaked to the core recessed part between magnetic poles and the projecting side surface of the magnetic poles, and increasing the effective magnetic flux. SOLUTION: A stator 1 has an armature coil 2, a rotor 3 consists of a core 4 with recessed and projecting parts on an air gap side surface and consists of a magnetic material such as S45C or a laminated silicon steel plate, and an NdFeB permanent magnet 7 is arranged on the side surface of a projecting part 5 that becomes the magnetic pole of the stator core 3. The permanent magnet 7 being provided on the side surface of the core projecting part 5 is magnetized in a peripheral direction, and a rotor core near the permanent magnet 7 and a magnetic path where the magnetic flux of magnet flows through the stator core 1 are formed. The magnetic flux of the permanent magnet 7 suppresses the leakage of the magnetic flux of the armature coil of the stator core to the side surface of the projecting part 4 of the magnetic pole of the rotor 3. Specifically, by suppressing the leakage magnetic flux, effective magnetic flux is increased, thus obtaining high output. |
