Invention Application
- Patent Title: INNER ROTOR-TYPE PERMANENT MAGNET MOTOR WITH ANNULAR MAGNETIC POLES
- Patent Title (中): 内置转子型永磁电机
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Application No.: US14935932Application Date: 2015-11-09
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Publication No.: US20160072371A1Publication Date: 2016-03-10
- Inventor: Fumitoshi YAMASHITA , Osamu YAMADA , Shiho OHYA , Akihiro YAMANE
- Applicant: MINEBEA CO., LTD.
- Applicant Address: JP Kitasaku-gun
- Assignee: MINEBEA CO., LTD.
- Current Assignee: MINEBEA CO., LTD.
- Current Assignee Address: JP Kitasaku-gun
- Priority: JP2011-222924 20111007
- Main IPC: H02K15/03
- IPC: H02K15/03

Abstract:
A motor includes poles P having a remanence Mr of 0.9 T or more, a coercivity HcJ of 0.80 MA/m or more, and a maximum energy product (BH)max of 150 kJ/m3 or more, which sets a center point Pc of the magnetic poles in a circumferential direction on a rotor outer circumferential surface to a maximum thickness tmax, wherein when a line connecting the Pc and a rotational axis center Rc is Pc-Rc, a straight line connecting an arbitrary point Px in the circumferential direction on the rotor outer circumferential surface and the Rc is Px-Rc, an apex angle of the lines Pc-Rc and Px-Rc is θ, a number of pole pairs is Pn, a circumferential direction magnetic pole end is Pe, and a magnetic pole end biasing distance ΔLPe of the circumferential direction magnetic pole ends Pe is α×tmax (α is a coefficient).
Information query