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

IPC: B64C27/12 ,  B64D41/00 ,  B60L7/02 ,  B60L7/10

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.

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

IPC: B64C27/12 ,  B64D41/00 ,  B60L7/02 ,  B60L7/10

CPC classification number: B64C27/12 ,  B60L7/02 ,  B60L7/10 ,  B60L2200/10 ,  B64D41/00 ,  Y02T90/16

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.

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

IPC: B64C27/12 ,  B60L7/10 ,  B64D41/00 ,  B60L7/02

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.