Rotor core, rotor of rotary electrical machine, rotary electrical machine, and automotive auxiliary electrical system

A rotor core configured by a plurality of laminated plates and forming a storage space for a magnet, wherein

• at least two of the plurality of laminated plates include a magnetic pole which has a base formed on an outer peripheral side of the storage space, and a bridge which is connected to the magnetic pole,
• a plurality of the magnetic poles are provided in a circumferential direction,
• a first space is formed between the bases of a pair of the magnetic poles adjacent in the circumferential direction,
• a q-axis outer peripheral portion which is located in the middle of a pair of the magnetic poles adjacent to each other in the circumferential direction and is in contact with the first space is provided on an inner peripheral side from the base,
• the base includes a side surface portion in contact with the first space, and a protrusion which is provided on an outer peripheral side from the side surface portion and protrudes in the circumferential direction with respect to the side surface portion, and
• the bridge is disposed on an inner peripheral side from the side surface portion, wherein
• the plurality of laminated plates include a first plate having the magnetic pole and the bridge, and a second plate having the magnetic pole and not having the bridge, and
• the magnetic pole of the first plate and the magnetic pole of the second plate are fastened to each other in an axial direction.