Inner rotor-type permanent magnet motor with annular magnetic poles

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United States of America Patent

PATENT NO 10511212
APP PUB NO 20180159407A1
SERIAL NO

15891916

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Abstract

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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).

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Patent Owner(s)

Patent OwnerAddress
MINEBEA MITSUMI INCNAGANO JAPAN NORTH GEORGIA JIUJUN KITASAKU-GUN NAGANO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ohya, Shiho Kitasaku-gun, JP 7 30
Yamada, Osamu Kitasaku-gun, JP 226 3574
Yamane, Akihiro Kitasaku-gun, JP 20 208
Yamashita, Fumitoshi Kitasaku-gun, JP 47 343

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