| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the rotation performance of an inner rotor type permanent magnet motor by making (BH)<SB POS="POST">max</SB>of a magnet higher while maintaining stable rotation of the inner rotor type permanent magnet motor. <P>SOLUTION: An annular magnetic pole P has a maximum radial thickness t<SB POS="POST">max</SB>at a magnetic pole center Pc in the circumferential direction of a rotor outer peripheral surface, a remnant magnetization Mr of 0.9T or more, a coercive field strength HcJ of 0.80MA/m or more, and a maximum energy product (BH)<SB POS="POST">max</SB>of 150 kJ/m<SP POS="POST">3</SP>or more. When it is assumed that a linear line connecting the Pc and a rotation axis center Rc is Pc-Rc, a linear line connecting an arbitrary point Px in the circumferential direction of the outer peripheral surface and the Rc is Px-Rc, an apex angle between the linear lines Pc-Rc and Px-Rc is θ, the number of pole pairs is Pn, and a magnetic pole end displacement distance ΔL<SB POS="POST">Pe</SB>of a magnetic pole end Pe is α×t<SB POS="POST">max</SB>(α is a coefficient), α is 0.25±0.3, the magnetic pole end displacement distance ΔL<SB POS="POST">Px</SB>of the arbitrary point Px on the Px-Rc line with respect to the apex angle θ is ΔL<SB POS="POST">Pe</SB>×cos(θ×Pn), and the magnetic pole ends Pe in the circumferential direction of parallel oriented annular magnetic poles P are mutually integrated. <P>COPYRIGHT: (C)2013,JPO&INPIT |
