公开(公告)号：US10658916B1

公开(公告)日：2020-05-19

申请号：US16138358

申请日：2018-09-21

Applicant: Facebook, Inc.

Inventor： Chiyun Xia ,  Eric Booen ,  William Hamlin Farr ,  Alexandre Chong

IPC: H02K41/035 ,  H02K41/03

Abstract: The disclosed system may include (1) a subassembly including (a) conductive coils having portions oriented along a first direction, and (b) a body that holds the coils such that the portions are aligned along a second direction orthogonal to the first direction, (2) a structure that generates a magnetic field directed through at least one coil along a third direction orthogonal to the first and second directions, (3) a commutation controller that (a) receives a current command indicating a total amount of current to provide to the coils, and (b) determines, based on a present location of the body along the second direction relative to the magnetic field, a portion of the total amount to supply to each coil, and (4) a coil driver for each coil, where each coil driver supplies the portion of the total amount to the corresponding coil. Various other embodiments are also disclosed.

公开(公告)号：US10824245B1

公开(公告)日：2020-11-03

申请号：US16138263

申请日：2018-09-21

Applicant: Facebook, Inc.

Inventor： Chiyun Xia ,  Eric Booen ,  William Hamlin Farr ,  Alexandre Chong

IPC: H02K41/035 ,  H02K41/03 ,  G06F3/033 ,  G06F3/01

Abstract: The disclosed system may include (1) a conductive coil, where at least a portion of the coil is oriented along a first direction and orthogonal to a second direction, (2) a magnetic field generation structure that generates a magnetic field through the coil along a third direction orthogonal to the first and second directions, (3) a detection subsystem that determines a location of the coil relative to the field, (4) a force-to-current converter that (a) receives a force command to alter a relative location of the coil and the field, and (b) issues, in response to the force command, a current command based on the location of the coil relative to the field, and (5) a coil driver that generates, in response to the current command, current in the coil to generate a force between the coil and the field along the second direction. Various other embodiments are also disclosed.