公开(公告)号：US20140043125A1

公开(公告)日：2014-02-13

申请号：US13960475

申请日：2013-08-06

Applicant: Minebea Co., Ltd.

Inventor： Fumitoshi YAMASHITA ,  Toshinori SUZUKI ,  Haruhiro KOMURA

IPC: H01F41/02

CPC classification number: H01F41/0266 ,  C22C38/005 ,  H01F1/0578 ,  H01F1/0579 ,  H01F1/059

Abstract: Provided is a method for producing a fully dense rare earth-iron-based bonded magnet, the method comprising: kneading a non-tacky thermosetting resin composition with rare earth-iron-based magnet flakes to produce a solid granular composite magnetic material; filling the granular composite magnetic material into a cavity, applying a uniaxial pressure higher than or equal to the yield stress of the thermosetting resin composition to the granular composite magnetic material so as to produce a green compact in which voids are reduced as a result of an interaction between brittle fracture of the magnet flakes and plastic deformation of the thermosetting resin composition, the rare earth-iron-based magnet flakes are piled on top of one another highly compact in the direction of the pressure axis, and the mutual positional relations of the magnet flakes are set almost regularly; and heating the green compact to cure the thermosetting resin composition constituting the green compact.

Abstract translation: 提供一种制造完全致密的稀土 - 铁基粘结磁体的方法，所述方法包括：将非粘性热固性树脂组合物与稀土 - 铁基磁体薄片捏合以制备固体颗粒状复合磁性材料; 将颗粒状复合磁性材料填充到空腔中，将高于或等于热固性树脂组合物的屈服应力的单轴压力施加到颗粒状复合磁性材料上，以便产生其中空隙由于 磁铁薄片的脆性断裂与热固性树脂组合物的塑性变形之间的相互作用，稀土 - 铁基磁体薄片堆叠在压力轴线方向彼此高度紧密的顶部，并且相互位置关系 磁铁片几乎定期设置; 并加热生坯以固化构成生坯的热固性树脂组合物。

公开(公告)号：US20160072371A1

公开(公告)日：2016-03-10

申请号：US14935932

申请日：2015-11-09

Applicant: MINEBEA CO., LTD.

Inventor： Fumitoshi YAMASHITA ,  Osamu YAMADA ,  Shiho OHYA ,  Akihiro YAMANE

IPC: H02K15/03

CPC classification number: H02K15/03 ,  H02K1/02 ,  H02K1/278 ,  H02K2201/03 ,  H02K2213/03

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).

Abstract translation: 马达包括具有0.9T以上的剩余磁道Mr的磁极P，0.80MA / m以上的矫顽磁力HcJ和150kJ / m 3以上的最大能量乘积（BH）max，设定中心点Pc 在转子外周面上的圆周方向上的磁极为最大厚度tmax，其中，当连接Pc和旋转轴中心Rc的线为Pc-Rc时，将圆周方向上的任意点Px的直线连接到 转子外圆周表面和Rc是Px-Rc，线Pc-Rc和Px-Rc的顶角是θ，极数为Pn，圆周方向磁极端为Pe，磁性 极端偏置距离Dgr;圆周方向磁极端部Pee的LPe为α×tmax（α为系数）。

公开(公告)号：US20130088114A1

公开(公告)日：2013-04-11

申请号：US13648073

申请日：2012-10-09

Applicant: MINEBEA CO., LTD.

Inventor： Fumitoshi YAMASHITA ,  Osamu YAMADA ,  Shiho OHYA ,  Akihiro YAMANE

IPC: H02K21/12

CPC classification number: H02K15/03 ,  H02K1/02 ,  H02K1/278 ,  H02K2201/03 ,  H02K2213/03

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).

Abstract translation: 马达包括具有0.9T以上的剩余磁道Mr的磁极P，0.80MA / m以上的矫顽磁力HcJ和150kJ / m 3以上的最大能量乘积（BH）max，设定中心点Pc 在转子外周面上的圆周方向上的磁极为最大厚度tmax，其中，当连接Pc和旋转轴中心Rc的线为Pc-Rc时，将圆周方向上的任意点Px的直线连接到 转子外圆周表面和Rc是Px-Rc，线Pc-Rc和Px-Rc的顶角是θ，极数为Pn，圆周方向磁极端为Pe，磁性 极端偏置距离Dgr;圆周方向磁极端部Pee的LPe为α×tmax（α为系数）。