MOTOR

• Main Authors: ARAO YUSUKE, ICHIEN AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2021
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

To provide a motor capable of reducing a cogging torque without providing a skew.SOLUTION: A motor comprises: a stator; and a pair of rotors 20 which is laminated in a shaft direction. Each rotor 20 includes: an inner core part 24; a first outer core part 25; a second outer core part 26 arranged at a position different from that of the first outer core part 25 in a circumferential direction; a first magnet 27 arranged on an outer side of a radial direction from the first outer core part 25; and a second magnet 28 arranged between the inner core part 24 and the second outer core part 26. An outer side face 25a in the radial direction of the first outer core part is positioned at an inner side in the radial direction from an outer side face 28a of the radial direction of the second magnet. A first magnetic pole part 51 structured by the first outer core part 25 and the first magnet 27 and a second magnetic pole part 52 structured by the second magnet 28 and the second outer core part 26 are alternately arranged in the circumferential direction, and one of the first magnetic pole part 51 and the other one of the second magnetic pole part 52 of the pair of rotors 20 are arranged in the shaft direction, and both circumferential direction positions are the same.SELECTED DRAWING: Figure 3 【課題】スキューを設けることなく、コギングトルクを低減できるモータの提供。【解決手段】ステータと、軸方向に積層される一対のロータ２０と、を備える。ロータ２０は、内コア部２４と、第１外コア部２５と、周方向において第１外コア部２５とは異なる位置に配置される第２外コア部２６と、第１外コア部２５よりも径方向外側に配置される第１マグネット２７と、内コア部２４と第２外コア部２６との間に配置される第２マグネット２８と、を有する。第１外コア部の径方向外側面２５ａが、第２マグネットの径方向外側面２８ａよりも径方向内側に位置する。第１外コア部２５と第１マグネット２７とにより構成される第１磁極部５１と、第２マグネット２８と第２外コア部２６とにより構成される第２磁極部５２とが、周方向に交互に配置され、一対のロータ２０のうち一方の第１磁極部５１と他方の第２磁極部５２とは、軸方向に並んで、かつ周方向位置が同じである。【選択図】図３