公开(公告)号：US11527946B2

公开(公告)日：2022-12-13

申请号：US16900718

申请日：2020-06-12

Applicant: Apple Inc.

Inventor： Riccardo Tarelli ,  Yumeng Liu ,  Shingo Yoneoka

IPC: H02K33/16 ,  H02K33/14 ,  G01L1/14 ,  H02P23/14 ,  G01D5/20 ,  H02K1/34 ,  H02P7/025

Abstract: A haptic engine includes a haptic actuator having a double-wound driving coil in which the two windings are connected with each other either in series or in parallel. By using the double-wound driving coil in which the two windings are connected with each other in series, an instant back EMF voltage induced in either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding, and without having to sense a driving current through the double-wound driving coil. By using the double-wound driving coil in which the two windings are connected with each other in parallel, an instant back EMF voltage induced in either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding.

公开(公告)号：US11539279B2

公开(公告)日：2022-12-27

申请号：US16900744

申请日：2020-06-12

Applicant: Apple Inc.

Inventor： Riccardo Tarelli ,  Yumeng Liu

IPC: H02K33/12 ,  H02P7/02 ,  H02P23/14 ,  H02P25/032 ,  H02P25/22 ,  B06B1/04

Abstract: A haptic engine includes a gap-closing actuator having a double-wound driving coil in which the two windings can be activated with two driving sources, respectively. Or, the two windings double-wound driving coil can be activated with a single driving source when the two windings are connected with each other either in series or in parallel. By using the double-wound driving coil in the gap-closing actuator as described, an instant inductance of either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding.

公开(公告)号：US20210099062A1

公开(公告)日：2021-04-01

申请号：US16900744

申请日：2020-06-12

Applicant: Apple Inc.

Inventor： Riccardo Tarelli ,  Yumeng Liu

IPC: H02K33/12

Abstract: A haptic engine includes a gap-closing actuator having a double-wound driving coil in which the two windings can be activated with two driving sources, respectively. Or, the two windings double-wound driving coil can be activated with a single driving source when the two windings are connected with each other either in series or in parallel. By using the double-wound driving coil in the gap-closing actuator as described, an instant inductance of either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding.

公开(公告)号：US11496034B2

公开(公告)日：2022-11-08

申请号：US16900591

申请日：2020-06-12

Applicant: Apple Inc.

Inventor： Riccardo Tarelli ,  Yumeng Liu

IPC: H02K33/12 ,  H02P7/02 ,  H02P23/14 ,  H02P25/032 ,  H02P25/22 ,  B06B1/04

Abstract: A haptic engine includes a linear resonant actuator having a double-wound driving coil which is used for sensing a back electromotive force (EMF) voltage independently of the coil resistance, thus minimizing the back EMF voltage's sensitivity to temperature.

公开(公告)号：US11418100B2

公开(公告)日：2022-08-16

申请号：US16900591

申请日：2020-06-12

Applicant: Apple Inc.

Inventor： Riccardo Tarelli ,  Yumeng Liu

IPC: H02K33/12 ,  H02P7/02 ,  H02P23/14 ,  H02P25/032 ,  H02P25/22 ,  B06B1/04

Abstract: A haptic engine includes a linear resonant actuator having a double-wound driving coil which is used for sensing a back electromotive force (EMF) voltage independently of the coil resistance, thus minimizing the back EMF voltage's sensitivity to temperature.