Interior permanent-magnet motor and method for manufacturing the same
摘要
說明書
The rotor 3 manufactured by the method of the present embodiment suppresses a damage at the bridges when the rotor 3 rotates at a high speed, and so the durability of the rotor 3 improves. Amorphous soft magnetic materials have saturated magnetization lower than that of nanocrystal soft magnetic materials. Magnetic flux from a magnet therefore easily flows to the stator 2 through the parts other than the bridges, and the output characteristics of the motor 1 improve.
A molten metal including Fe and Ni as magnetic metals and B as a non-magnetic metal was prepared. This molten metal was quenched to manufacture an amorphous soft magnetic material having the composition of Fe84B13Ni3.
The material of Reference Example 1 was heated to 503° C. to alter the amorphous soft magnetic material into a nanocrystal soft magnetic material.
A magnetic steel sheet of Fe-3 mass % Si was prepared.
Evaluation Test
Test samples were prepared by cutting the materials of Reference Examples 1 to 3 into a predetermined shape, and tensile test was conducted for these test samples. Table 1 shows the result. Test samples were prepared by cutting the materials of Reference Examples 1 to 3 into a predetermined shape, and saturated magnetization of these test samples was measured. Table 1 shows the result.
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