Electric machine

An electric machine comprising:

• an armature portion;
• and
• a magnetic field portion that is relatively movable with respect to the armature portion, wherein
• the magnetic field portion includes a plurality of magnetic field cores, arranged in a machine moving direction, and a plurality of magnets, the machine moving direction being a direction of a relative movement between the armature portion and the magnetic field portion, each magnet being disposed between two adjacent magnetic field cores,
• the armature portion includes a first armature core and a second armature core that are located away from each other in a direction intersecting with the machine moving direction, a core coupling structure that magnetically couples the first armature core to the second armature core, and a plurality of coils,
• the first armature core includes a first magnetic pole group and a second magnetic pole group that are arranged in the machine moving direction and magnetically coupled together,
• the second armature core includes a third magnetic pole group and a fourth magnetic pole group that are arranged in the machine moving direction and magnetically coupled together,
• a position of the first magnetic pole group in the machine moving direction corresponds to a position of the third magnetic pole group in the machine moving direction,
• a position of the second magnetic pole group in the machine moving direction corresponds to a position of the fourth magnetic pole group in the machine moving direction,
• the plurality of coils include a first coil that is provided in one of the first magnetic pole group or the third magnetic pole group,
• a first magnetic flux that passes through the first coil and a second magnetic flux that passes through the first coil are formed by one or some of the magnets,
• a first magnetic circuit through which the first magnetic flux passes includes the first magnetic pole group, the second magnetic pole group, the third magnetic pole group, the fourth magnetic pole group, the magnetic field core, and the magnets,
• a second magnetic circuit through which the second magnetic flux passes includes the first magnetic pole group, the core coupling structure, the third magnetic pole group, the magnetic field core, and the magnets,
• the magnetic field portion includes a first surface along the machine moving direction,
• the first armature core and the second armature core are positioned in a first direction intersecting with the machine moving direction with respect to the first surface of the magnetic field portion,
• the core coupling structure includes a plurality of core coupling portions that are arranged in the machine moving direction, and
• the plurality of core coupling portions include a core coupling portion that is positioned in the first direction with respect to the first magnetic pole group, the third magnetic pole group, and the first coil.