Rotor core and forming method thereof, rotor, motor and centrally-mounted motor

• Main Authors: WANG LEI, LUO CHONGXIE, YING YUKUN
• Format: Patent
• Language: Chinese; English
• Published: 06.01.2023
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

The invention discloses a rotor core and a forming method thereof, a rotor, a motor and a centrally-mounted motor, and aims to reduce or eliminate the problem of jumping in the rotating process after the rotor core and a rotating shaft are assembled. The rotor iron core comprises a plurality of groups of iron core punching sheets, each group of iron core punching sheets comprises at least one iron core punching sheet, the number of iron core poles of the iron core punching sheets is N, M gaps are arranged in shaft holes of the iron core punching sheets, M is not an integral multiple of N. After the plurality of groups of iron core punching sheets are laminated to form the rotor iron core, M is a positive integer, and N is a positive integer. The projections of the gaps of at least one group of iron core punching sheets and the projections of the gaps of the other groups of iron core punching sheets on the plane where any iron core punching sheet is located are not overlapped. According to the rotor iron core