MAGNETIZING DEVICE AND METHOD FOR MANUFACTURING PERMANENT MAGNET MOTOR

摘要

A permanent magnet type magnetizing power supply that enables magnetization without using a magnetizing power supply comprises: a magnetic field generation space (3) having a dimension that enables a magnetized piece (5) to pass through; and a magnetic circuit (4) that includes at least a pair of permanent magnets (1a, 1b) provided at positions facing each other with the magnetic field generation space in between and having mutually the same magnetic field direction and that forms a circulatory magnetic field (4a) passing through the magnetic field generation space from one of the permanent magnets, entering the other one of the permanent magnet, and finally returning to the one of the permanent magnets. The magnetic circuit (4) can further include, for example, pole pieces (2a, 2b) provided on the magnetic field generation space sides of the pair of permanent magnets (1a, 1b), having one end contacting the permanent magnet and the other end contacting the magnetic field generation space, and having such a shape that the cross-sectional area of a plane orthogonal to the magnetic field direction decreases from the one end toward the other end and a yoke (2) connecting between the opposite sides of the respective permanent magnets with respect to the pole pieces.