SPOKE PERMANENT MAGNET MACHINE WITH REDUCED TORQUE RIPPLES AND METHOD OF MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To reduce torque ripples.SOLUTION: An embodiment includes a rotor assembly having a shaft including a plurality of protrusions which extend radially outward from a main shaft body and are formed circumferentially about the main shaft body and along an axial length of the main shaft body. A plurality of stacks of laminations are arranged circumferentially about the shaft to receive the plurality of protrusions in the laminations, with each stack of laminations including a plurality of lamination groups arranged axially along a length of the shaft and with permanent magnets being disposed between the stacks of laminations. Each of the laminations includes a shaft protrusion cut formed in the lamination to receive a corresponding shaft protrusion and, for each of the stacks of laminations, the shaft protrusion cuts formed in the laminations of a corresponding lamination group are angularly offset from the shaft protrusion cuts formed in the laminations in an adjacent lamination group. 【課題】トルクリップルを低減する。【解決手段】主軸体から径方向外側に延びかつ主軸体を中心として円周に主軸体の軸線方向長さに沿って形成された複数の突起を備える軸を有するロータ組立体を含む。複数の薄板積層体は、薄板に複数の突起を受け入れるように、軸を中心として円周に配設され、各薄板積層体が軸の長さに沿って軸線方向に配設された複数の薄板群を含み、永久磁石が薄板積層体の間に配置される。薄板の各々は、それぞれの軸突起を受け入れるように薄板に形成された軸突起切欠き部を含み、複数の薄板積層体の各々に対して、それぞれの薄板群の薄板に形成された軸突起切欠き部が、隣接する薄板群の薄板に形成された軸突起切欠き部から角度的にオフセットされる。【選択図】図１Ａ