公开(公告)号：US11993118B1

公开(公告)日：2024-05-28

申请号：US16941587

申请日：2020-07-29

Applicant: APPLE INC.

Inventor： Jack Erdozain, Jr. ,  Jeffrey A. Sewell ,  Johnny L. Wall ,  Colin Szechy

IPC: B60G17/00 ,  B60G17/005 ,  B60G17/015 ,  B60G17/0165 ,  B60G17/033 ,  B60G17/06 ,  H01F7/02 ,  H01F7/06

CPC classification number: B60G17/0157 ,  B60G17/005 ,  B60G17/0165 ,  B60G17/033 ,  B60G17/06 ,  H01F7/0231 ,  H01F7/064 ,  B60G2202/16 ,  B60G2202/25 ,  B60G2202/42 ,  B60G2204/46 ,  B60G2204/62 ,  B60G2400/05 ,  B60G2400/206 ,  B60G2400/208 ,  B60G2600/182 ,  B60G2600/22 ,  B60G2800/01

Abstract: A motion control system that can detect a change in a an operating characteristic and send a stabilizing command to an actuator system based on the change is described. A motion control component in the system includes a first component with an electropermanent magnet having a coil, differing first and second permanent magnet materials, and differing first and second states. The motion control component includes a second component configured to magnetically interact with the first component to define a damping characteristic that affects motion between the first component and the second component and a controller configured to supply a current pulse to the electropermanent magnet to switch the electropermanent magnet between the first and second states. The electropermanent magnet retains the respective first or second state after cessation of the current pulse.