Patent ID: 8653709

Claim:
A rotating electrical machine comprising: a stator; and a rotor facing said stator and having a direction of rotation that is orthogonal to a direction facing to said stator; one of said stator and said rotor having a coil, the other of said stator and said rotor having: a plurality of magnetic pole units aligned in said direction of rotation, the magnetic pole units each forming first and second magnetic poles configured to be aligned alternately in said direction of rotation and to have mutually opposite polarities at a side of the one of said stator and said rotor; and a holding core configured to hold each of said magnetic pole units on the other of said stator and said rotor, each of said magnetic pole units comprising: a unit core; a permanent magnet; and a plurality of bolts, said unit core including: a first projecting part and a second projecting part formed on both ends respectively along said direction of rotation and configured to protrude toward the side of the one of said stator and said rotor along a radial direction; a plurality of first bolt holes configured to pass through said first projecting part along a radial direction; a plurality of second bolts holes configured to pass through said second projecting part along a radial direction; and a groove or a hole provided along an axial direction and provided at a middle portion between said plurality of first bolt holes of said first projecting part and said plurality of second bolt holes of said second projecting part along said direction of rotation, said bolts passing through said bolt holes respectively and fixing said unit core to an edge portion of said holding core in a radial direction, said permanent magnet being inserted in said groove or said hole, said first magnetic pole being formed by said permanent magnet, and said second magnetic pole being formed by each of said projecting parts adjacent along said direction of rotation.