Interior permanent magnet rotor and method for manufacturing the same
A manufacturing method and magnet technology, which are applied in the field of manufacturing magnet-embedded rotors and magnet-embedded rotors, and can solve problems such as permanent magnets being easily demagnetized
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[0038] Next, a first embodiment of a magnet-embedded rotor will be described with reference to the drawings. figure 1 The illustrated rotor 10 is built into an embedded magnet synchronous motor (IPMSM). The IPMSM constitutes an electric power steering (EPS). The rotor 10 includes a magnetic core 12 and permanent magnets 16 formed of a soft magnetic material. The magnetic core 12 is formed by laminating a plurality of silicon steel sheets, that is, electromagnetic steel sheets, and has functions of holding a magnetic circuit, the permanent magnets 16 , and generating and transmitting rotational torque. The magnetic core 12 has ten insertion holes 14 penetrating in the axial direction Da. The cross-sectional shape of the insertion hole 14 perpendicular to the axial direction Da is substantially U-shaped. The insertion holes 14 are evenly arranged in the circumferential direction Dc of the magnetic core 12 . A permanent magnet 16 is embedded in the insertion hole 14 . The pe...
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