Abstract: A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine. A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation.

Abstract: An outer blade cutting wheel comprising an annular thin disc base of cemented carbide and a blade section is manufactured by disposing permanent magnet pieces on the side surfaces and inward of the outer periphery of the base to produce a magnetic field, providing magnetic coated diamond and/or CBN abrasive grains such that the magnetic field may act on the grains, causing the grains to be magnetically attracted to the base outer periphery, and electroplating or electroless plating whereby the abrasive grains are bound to the base outer periphery to form the blade section.

Abstract: When a rare earth magnet block is cut or ground by a cutting or grinding tool, a jig is used for holding the magnet block in place. The jig comprises a base, a pair of metal support members disposed on opposite sides of the base and provided with grooves, and rubber rods received in the support member grooves such that the rubber rod partially protrudes from the groove and abuts on the groove bottom. The magnet block is rested on the base and clamped between the rubber rods. The volume of the groove is larger than the volume of the rubber rod.

Abstract: A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine. A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation.

Abstract: A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine is provided. A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of. assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation with the assembled state being maintained.

Abstract: A permanent magnet rotary machine comprises a rotor comprising a rotor core and a plurality of permanent magnet segments embedded in the rotor core and a stator having a plurality of coils and disposed to define a gap with the rotor, or a permanent magnet rotary machine comprises a rotor comprising a rotor core and a plurality of permanent magnet segments mounted on the surface of the rotor core and a stator having a plurality of coils and disposed to define a gap with the rotor. In the rotor, each permanent magnet segment is an assembly of divided permanent magnet pieces, the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece, and the assembly allows for electrical conduction between the magnet pieces.

Abstract: A rotor adapted for a large permanent magnet rotating machine having high output and demagnetization resistance and the permanent magnet rotating machine are provided. More specifically, there is provided a rotor adapted for a permanent magnet rotating machine, the machine comprising the rotor and a stator disposed with a clearance from an outer peripheral face of the rotor and formed by winding a winding wire through a stator core having two or more slots, the rotor comprising one or more permanent magnets in each of two or more insertion holes, the insertion holes being formed in a circumferential direction in a rotor core, wherein a magnetic coercive force in a stator-side surface region of each of the permanent magnets is greater than that in an inner central portion by 300 kA/m or more, the inner central portion being an inner portion at a depth of at least 5 mm from every outer shape face of the permanent magnet.

Abstract: A magnet holding jig comprises a platform and first and second holders disposed on opposite sides of the platform. The platform is provided with channels, the holders are comb-shaped to define digits and slits, the channels and the slits being aligned to define guide paths for permitting entry of a cutting tool therein, and the holders are also configured as digitate hooks. The holder hooks are in contact with a rare earth magnet block resting on the platform. The holders are pushed inward at their lower portions so as to elastically deform the digitate hook and move it backward and to bring the hook digits in pressure abutment with the magnet block, thereby holding the magnet block in place on the platform.

Abstract: A magnet holding jig comprises a platform and first and second holders disposed on opposite sides of the platform. The platform is provided with channels, the holders are comb-shaped to define digits and slits, the channels and the slits being aligned to define guide paths for permitting entry of a cutting tool therein, and the holders are also configured as digitate hooks. The holder hooks are in contact with a rare earth magnet block resting on the platform. The holders are pushed inward at their lower portions so as to bring each hook digit of the second holder in pressure abutment with the magnet block at a higher level than each hook digit of the first holder for thereby holding the magnet block in place on the platform.

Abstract: An axial gap-type permanent magnetic rotating machine comprises a rotor comprising a rotating shaft having an axis of rotation, a rotor yoke of disc shape radially extending from the shaft, and a plurality of permanent magnet segments circumferentially arranged on a surface of the rotor yoke such that each permanent magnet segment may have a magnetization direction parallel to the axis of rotation, and a stator having a plurality of circumferentially arranged coils and disposed to define an axial gap with the rotor. In the rotor, each permanent magnet segment is an assembly of two or more divided permanent magnet pieces, and the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece.

Abstract: An interior permanent magnet (IPM) rotary machine comprises a rotor comprising a rotor yoke having bores and a plurality of permanent magnet segments disposed in the bores of the rotor yoke, each permanent magnet segment consisting of a plurality of magnet pieces. The rotor is assembled by inserting the plurality of unbound magnet pieces in each bore for stacking the magnet pieces, and fixedly securing the stacked magnet pieces in the bore.

Abstract: A permanent magnet rotary machine comprises a rotor comprising a rotor core and a plurality of permanent magnet segments embedded in the rotor core and a stator having a plurality of coils and disposed to define a gap with the rotor, or a permanent magnet rotary machine comprises a rotor comprising a rotor core and a plurality of permanent magnet segments mounted on the surface of the rotor core and a stator having a plurality of coils and disposed to define a gap with the rotor. In the rotor, each permanent magnet segment is an assembly of divided permanent magnet pieces, the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece, and the assembly allows for electrical conduction between the magnet pieces.

Abstract: A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine is provided. A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of: assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation with the assembled state being maintained.

Abstract: An outer blade cutting wheel comprising an annular thin disc base of cemented carbide and a blade section is manufactured by disposing permanent magnet pieces on the side surfaces and inward of the outer periphery of the base to produce a magnetic field, providing magnetic coated diamond and/or CBN abrasive grains such that the magnetic field may act on the grains, causing the grains to be magnetically attracted to the base outer periphery, and electroplating or electroless plating whereby the abrasive grains are bound to the base outer periphery to form the blade section.

Abstract: There is provided a permanent magnet rotating machine applicable to a power generating facility such as a wind power generating facility, which facilitates the increase of the capacity in an axial gap rotating machine, and affords the high space efficiency. The permanent magnet rotating machine 1 includes a rotating shaft; two end rotors capable of rotating integrally with the rotating shaft, and being arranged with a space being provided therebetween in the axial direction of the rotating shaft. The rotating shift includes at least one inner rotor capable of rotating integrally with the rotating shaft, and being arranged in the space formed by the two end rotors so as to be separate from the two end rotors, and at least two stators isolated from the rotation of the rotating shaft, and being arranged in the spaces formed by the end rotors and the inner rotor.

Abstract: It is an object of the present invention to provide a package for permanent magnets in which the amount of magnetic field that leaks externally is reduced, and that is stable. There is provided a permanent magnet package 1 comprising: a plurality of magnet rows, wherein each of the magnet rows comprises a plurality of permanent magnets 2, wherein the magnetization direction of all the permanent magnets in a single magnet row is the same, and is parallel to the magnet row, and wherein the plurality of the magnet rows are arranged such that the magnetization direction of adjacent rows is opposite; and the method for manufacturing the same.

Abstract: It is an object to provide a package for a magnetic circuit, with which a leakage magnetic field escaping from an aperture of a magnetic circuit is reduced and the magnetic attraction acting on the packaging plates is lowered, thus reducing the number of packaging work steps. There are provided a packaging plate for a permanent magnet-type magnetic circuit, the packaging plate comprising at least one non-magnetic layer and at least one magnetic layer; and a method for packaging a permanent magnet-type magnetic circuit, comprising a step of shielding at least a portion of an aperture of a permanent magnet-type magnetic circuit using at least one packaging plates.

Abstract: It is an object of the present invention to provide a package for permanent magnets in which the amount of magnetic field that leaks externally is reduced, and that is stable. There is provided a permanent magnet package 1 comprising: a plurality of magnet rows, wherein each of the magnet rows comprises a plurality of permanent magnets 2, wherein the magnetization direction of all the permanent magnets in a single magnet row is the same, and is parallel to the magnet row, and wherein the plurality of the magnet rows are arranged such that the magnetization direction of adjacent rows is opposite; and the method for manufacturing the same.

Abstract: It is an object of the present invention to facilitate adjustment of magnetic fields. There is provided a magnetic circuit with opposing permanent magnets, comprising: a pair of permanent magnets opposing each other across a gap, the pair of permanent magnets being magnetized in thickness direction; a yoke magnetically coupled to the permanent magnets, and provided outside of the permanent magnets and the gap; a pair of pole pieces each arranged on a gap side of an opposing surface of each of the permanent magnets and having a peripheral projection in opposing direction; and an adjustment permanent magnet piece having magnetic flux amount of at most 2×10?7 Wb provided so as to magnetically communicate with a magnetic field formed in the gap.

Abstract: To reduce the cost of the magnet of magnetic circuits with opposing permanent magnets by ensuring that inexpensive magnets having a low coercive force can be used without substantial loss of magnetism caused by demagnetization fields, there is provided a magnetic circuit with opposing permanent magnets, comprising: a pair of permanent magnet units opposing each other across a gap, the pair of permanent magnets being magnetized in thickness direction, wherein each of the permanent magnet units comprises at least two types of permanent magnet pieces with different coercive forces, and wherein, the permanent magnet piece that receives the largest demagnetization force when the permanent magnet units are manufactured has a larger coercive force than at least one other type of the permanent magnet piece; a yoke magnetically coupled to the permanent magnet units, and provided outside of the permanent magnet units and the gap; and a pair of pole pieces each arranged on a gap side of an opposing surface of each of th