| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonoriented magnetic steel sheet for a switched reluctance motor in which motor efficiency can be improved, and also, torque pulsating can be reduced, and whose magnetic anisotropy is reduced, and to provide a production method therefor. <P>SOLUTION: The nonoriented magnetic steel sheet has a composition comprising, by mass, ≤0.005% C, 1.5 to 3.5% Si, ≤2.0% Al, 0.05 to 1.5% Mn, 0.02 to 0.5% P, ≤0.005% S, ≤0.005% N and ≤0.005% Ti, and the balance Fe with inevitable impurities, and is characterized in that, provided that the magnetic density in the magnetizing force H=3,000 A/m in the L direction, C direction and D direction of the sample is each defined as B<SB>30</SB>(L), B<SB>30</SB>(C) and B<SB>30</SB>(D), [B<SB>30</SB>(L)+B<SB>30</SB>(C)+2×B<SB>30</SB>(D)]/4≥1.60(T) and B<SB>30</SB>(D)≥0.96×[B<SB>30</SB>(L)+B<SB>30</SB>(C)]/2 are satisfied, and also, under the conditions of the magnetic flux density of 1.5(T) and sine waves with the frequency of 50 Hz, provided that core loss on magnetization to the L direction, C direction and D direction of the sample is each defined as W<SB>15/50</SB>(L), W<SB>15/50</SB>(C) and W<SB>15/50</SB>(D), W<SB>15/50</SB>(D)≤1.10×[W<SB>15/50</SB>(L)+W<SB>15/50</SB>(C)]/2 is satisfied. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
