Brushless motor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMakoto Hasegawa, Kenji Kubo, Naoto Noguchi, Toshio Imai
Life of this patent
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Abstract
A brushless motor comprises a rotor which is rotatable on an axis of the brushless motor and which include permanent magnets arranged circumferentially thereon, an output member connected to the rotor to rotate with the rotor, and a stator which includes electro-magnetic coils energized in order to rotate the rotor, and has a first space which receives the output member therein and a second space which extends from the first space to the outside of the stator so that an output power of the brushless motor is transmitted from the output member to the outside of the brushless motor through the second space.
Claims15
A brushless motor comprising:
- rotor means which is rotatable on an axis of the brushless motor and which includes permanent magnets arranged circumferentially thereon,
- output means connected to the rotor means to rotate with the rotor means, and
- stator means which includes electro-magnetic coils energized in order to rotate the rotor means, said stator means having a first space which receives the output means therein and a second space which extends radially from the first space to a region external to the stator means so that an output power of the brushless motor is transmitted from the output means to a region external to the brushless motor through the second space,
- the rotor means comprising sub-rotor means which is rotatable on the axis of the brushless motor, the sub-rotor means being fixed to the output means and having permanent magnets whose N poles face S poles of the rotor means through the second space and whose S poles face N poles of the rotor means through the second space.
Dependencies are inferred from the claim text.