公开(公告)号：US10651713B2

公开(公告)日：2020-05-12

申请号：US15204500

申请日：2016-07-07

Applicant: ARM Ltd.

Inventor： David Victor Pietromonaco

IPC: H02K19/10 ,  H02K19/06 ,  H02K11/00 ,  H02K1/24 ,  H02K11/33 ,  H02K1/14 ,  H02K3/18 ,  H02P25/08 ,  H02K3/02 ,  H02K3/28

Abstract: An electric motor may comprise a rotor and a stator comprising rotor and stator teeth, respectively. A non-uniform angular spacing or grouping of rotor teeth may facilitate desired rotational speeds of the rotor. In an embodiment, such non-uniform angular spacing may be such that for at least a subset of the rotor teeth comprising a first, second, and third rotor tooth, an angular spacing between the first and the second rotor teeth is at least twice an angular spacing between the second and the third rotor teeth.

公开(公告)号：US09866159B1

公开(公告)日：2018-01-09

申请号：US15368319

申请日：2016-12-02

Applicant: ARM Ltd.

Inventor： David Victor Pietromonaco

IPC: H02P25/08 ,  H02P6/185 ,  H02P25/089

CPC classification number: H02P6/185 ,  H02P6/15 ,  H02P25/086 ,  H02P25/089

Abstract: Electric motors may include one or more sensors usable to determine rotor alignment and/or speed. A method and apparatus for rotor alignment and/or speed error detection and/or correction are proposed, such as using signals from one or more sensors. A method and apparatus for controlling stator tooth activation based, at least in part, on corrections and offsets is also disclosed.

公开(公告)号：US10312845B2

公开(公告)日：2019-06-04

申请号：US15182474

申请日：2016-06-14

Applicant: ARM Ltd.

Inventor： David Victor Pietromonaco

IPC: H02P27/08 ,  H02P25/086 ,  H02P25/08 ,  H02K19/10

Abstract: Apparatus and methods are provided for operating an electric motor, comprising selectively energizing the coils of a stator having a plurality of stator teeth, each stator tooth having a said coil mounted thereon. The stator coils of a subset of the stator teeth are energized during a given time period to attract a corresponding rotor tooth into alignment with each of the stator teeth in the subset over the given time period. The stator coil of at least one stator tooth in the subset is energized during a portion of the given time period before the at least one stator tooth overlaps the corresponding rotor tooth.

公开(公告)号：US10298101B2

公开(公告)日：2019-05-21

申请号：US15145702

申请日：2016-05-03

Applicant: ARM Ltd.

Inventor： David Victor Pietromonaco

IPC: H02K11/33 ,  H02P25/16 ,  H02K11/20 ,  H02K1/14 ,  H02K3/28 ,  H02P25/092 ,  H02K3/12 ,  H02K19/10

Abstract: A method and a device for engendering rotation of a rotor relative to a stator. Stator teeth may comprise a mutually coupled coil winding pair, and a driver circuit may drive current through a first coil winding of the mutually coupled coil winding pair to generate a current on a second coil winding of the mutually coupled coil winding pair. The driver circuit may drive charge through the second coil winding to apply a torque to a rotor tooth. The driver circuit may also recapture and store charge to drive through the second coil winding.

公开(公告)号：US20180294758A1

公开(公告)日：2018-10-11

申请号：US15483990

申请日：2017-04-10

Applicant: ARM Ltd.

Inventor： David Victor Pietromonaco

IPC: H02P25/08 ,  H02K19/10 ,  H02K3/28 ,  H02P21/22 ,  H02K3/18 ,  H02K11/00

Abstract: An electrical motor comprising multiple inductive coils, and a method for using same, is disclosed. The inductive coils may be configured to conduct current bi-directionally. Terminals of the inductive coils may be coupled to a common node on a power bus coupled to a power supply. Current flowing in a first inductive coil from the power bus may be largely offset by current returned to the power bus from a second inductive coil.