Anisotropic bond magnet for four-magnetic-pole motor, motor using the same, device for orientation processing of anisotropic bond magnet for four-magnetic-pole motor

A 4-pole motor anisotropic bonded magnet characterized in that

• the said magnet has a hollow cylindrical shape and a maximum energy product greater than 14 MGOe, formed by molding anisotropic rare-earth magnet powder with resin, wherein
• the alignment distribution of the anisotropic rare-earth magnet powder in a cross section perpendicular to the axis of the anisotropic bonded magnet is in the normalized direction of the cylindrical side of the hollow cylindrical shape in the main region of a polar period, and in a transition region in which the direction of the magnetic pole changes, steadily points towards a direction tangential to the periphery of the cylindrical side at points closer to the neutral point of the magnetic pole, and becomes a direction tangential to the periphery of the cylindrical side at that neutral point, and steadily points toward the normalized direction of the cylindrical side at points farther away from the neutral point, and wherein
• the 4-pole motor anisotropic bonded magnet in which the said alignment distribution is obtained is magnetized in an alignment direction.

The alignment process apparatus according to claim 9, characterized in that the thickness of the magnetic flux inducement member is 1.0 to 3.5 mm.

The alignment process apparatus according to claim 9, characterized in that the magnetic flux inducement member is comprised of super-hard material.

The alignment process apparatus according to claim 9, characterized in that the aligning magnetic field of the region of the cavity in which the No. 2 dice are present induces magnetic flux greater than 0.5 T.

The alignment process apparatus according to claim 9, characterized in that it possesses a ring comprising cylindrical thin-wall magnetic super-hard material which forms the inner surface of the cavity, disposed on the outer periphery of the core.