公开(公告)号：US11183912B2

公开(公告)日：2021-11-23

申请号：US16440362

申请日：2019-06-13

Applicant: Amazon Technologies, Inc.

Inventor： Brian C. Beckman ,  Austin Brown

IPC: H02K21/22 ,  H02K1/27 ,  H02K29/08 ,  H02K11/215 ,  H02K7/14

Abstract: The described apparatus and method enable alteration of motor properties during operation of a motor. For example, the rotor of the motor may be adjustable, during motor operation, between a first diameter and a larger, second diameter. When the diameter of the rotor increases, the distance between the electromagnetic coils of the stator and the magnets of the rotor increases, thereby reducing the back-electromotor force (back-EMF) of the motor. When the back-EMF of the motor decreases, the torque of the motor decreases but the maximum revolutions per minute (RPM) increases. When the diameter of the rotor decreases, the distance between the electromagnetic coils of the stator and the magnets of the rotor decreases, thereby increasing the back-EMF of the motor. When the back-EMF of the motor increases, the torque of the motor increases but the maximum RPM decreases.

公开(公告)号：US20180083503A1

公开(公告)日：2018-03-22

申请号：US15268396

申请日：2016-09-16

Applicant: Amazon Technologies, Inc.

Inventor： Brian C. Beckman ,  Austin Brown

IPC: H02K1/27 ,  H02K1/14 ,  H02K3/18 ,  H02K21/22 ,  B64C39/02

CPC classification number: H02K1/2786 ,  B64C2201/042 ,  B64C2201/108 ,  H02K1/146 ,  H02K3/18 ,  H02K7/14 ,  H02K11/215 ,  H02K21/22 ,  H02K2213/09 ,  H02P6/08

Abstract: Described are methods and apparatus for altering the sound generated by a motor during operation. For example, the implementations described herein include a motor in which the spacing between the rotor magnets is non-uniform (i.e., the spacing varies between rotor magnets). With non-uniform spacing of the rotor magnets, the sound generated during operation of the motor is altered. In still other implementations, the spacing or alignment of the electromagnetic coils of the stator may also be non-uniform or irregularly spaced.

公开(公告)号：US20190296624A1

公开(公告)日：2019-09-26

申请号：US16440362

申请日：2019-06-13

Applicant: Amazon Technologies, Inc.

Inventor： Brian C. Beckman ,  Austin Brown

IPC: H02K21/22 ,  H02K29/08 ,  H02K11/215 ,  H02K1/27

Abstract: The described apparatus and method enable alteration of motor properties during operation of a motor. For example, the rotor of the motor may be adjustable, during motor operation, between a first diameter and a larger, second diameter. When the diameter of the rotor increases, the distance between the electromagnetic coils of the stator and the magnets of the rotor increases, thereby reducing the back-electromotor force (back-EMF) of the motor. When the back-EMF of the motor decreases, the torque of the motor decreases but the maximum revolutions per minute (RPM) increases. When the diameter of the rotor decreases, the distance between the electromagnetic coils of the stator and the magnets of the rotor decreases, thereby increasing the back-EMF of the motor. When the back-EMF of the motor increases, the torque of the motor increases but the maximum RPM decreases.

公开(公告)号：US20180083495A1

公开(公告)日：2018-03-22

申请号：US15268390

申请日：2016-09-16

Applicant: Amazon Technologies, Inc.

Inventor： Brian C. Beckman ,  Austin Brown

IPC: H02K1/02 ,  H02K1/27 ,  H02K1/14 ,  H02K21/22 ,  H02K11/00

CPC classification number: H02K21/22 ,  H02K1/2786 ,  H02K7/14 ,  H02K11/215 ,  H02K29/08 ,  H02K2213/03

Abstract: The described apparatus and method enable alteration of motor properties during operation of a motor. For example, the rotor of the motor may be adjustable, during motor operation, between a first diameter and a larger, second diameter. When the diameter of the rotor increases, the distance between the electromagnetic coils of the stator and the magnets of the rotor increases, thereby reducing the back-electromotor force (back-EMF) of the motor. When the back-EMF of the motor decreases, the torque of the motor decreases but the maximum revolutions per minute (RPM) increases. When the diameter of the rotor decreases, the distance between the electromagnetic coils of the stator and the magnets of the rotor decreases, thereby increasing the back-EMF of the motor. When the back-EMF of the motor increases, the torque of the motor increases but the maximum RPM decreases.

公开(公告)号：US10367399B2

公开(公告)日：2019-07-30

申请号：US15268390

申请日：2016-09-16

Applicant: Amazon Technologies, Inc.

Inventor： Brian C. Beckman ,  Austin Brown

IPC: H02K1/27 ,  H02K7/14 ,  H02K21/22 ,  H02K29/08 ,  H02K11/215

Abstract: The described apparatus and method enable alteration of motor properties during operation of a motor. For example, the rotor of the motor may be adjustable, during motor operation, between a first diameter and a larger, second diameter. When the diameter of the rotor increases, the distance between the electromagnetic coils of the stator and the magnets of the rotor increases, thereby reducing the back-electromotor force (back-EMF) of the motor. When the back-EMF of the motor decreases, the torque of the motor decreases but the maximum revolutions per minute (RPM) increases. When the diameter of the rotor decreases, the distance between the electromagnetic coils of the stator and the magnets of the rotor decreases, thereby increasing the back-EMF of the motor. When the back-EMF of the motor increases, the torque of the motor increases but the maximum RPM decreases.