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公开(公告)号:US10220942B2
公开(公告)日:2019-03-05
申请号:US15241529
申请日:2016-08-19
Applicant: Bell Helicopter Textron Inc.
Inventor: John Robert Wittmaak
Abstract: In some embodiments, a rotorcraft includes a fuselage having a rotor hub assembly protruding therefrom that is rotatable relative thereto. A generator having an armature is mechanically coupled to the rotor hub assembly such that the armature is rotatable in response to rotation of the rotor hub assembly. A braking unit is in selective electrical communication with the generator. The braking unit is adapted to apply an electrical resistance to rotation of the armature, thereby reducing a rotational speed of the rotor hub assembly.
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公开(公告)号:US20180050796A1
公开(公告)日:2018-02-22
申请号:US15241529
申请日:2016-08-19
Applicant: Bell Helicopter Textron Inc.
Inventor: John Robert Wittmaak
Abstract: In some embodiments, a rotorcraft includes a fuselage having a rotor hub assembly protruding therefrom that is rotatable relative thereto. A generator having an armature is mechanically coupled to the rotor hub assembly such that the armature is rotatable in response to rotation of the rotor hub assembly. A braking unit is in selective electrical communication with the generator. The braking unit is adapted to apply an electrical resistance to rotation of the armature, thereby reducing a rotational speed of the rotor hub assembly.
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公开(公告)号:US20190152591A1
公开(公告)日:2019-05-23
申请号:US16256043
申请日:2019-01-24
Applicant: Bell Helicopter Textron Inc.
Inventor: John Robert Wittmaak
Abstract: A braking system for a rotorcraft having a rotor hub assembly includes a generator having an armature mechanically coupled to the rotor hub assembly such that the armature is rotatable in response to rotation of the rotor hub assembly and a braking unit in selective electrical communication with the generator. The braking unit is adapted to apply an electrical resistance to rotation of the armature, thereby reducing a rotational speed of the rotor hub assembly.
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