公开(公告)号：US11898887B2

公开(公告)日：2024-02-13

申请号：US17303675

申请日：2021-06-04

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga ,  Sudheer Puttapudi ,  Surendra Akkina

IPC: G01D5/20

CPC classification number: G01D5/204

Abstract: An apparatus for inductive rotational-position sensing is disclosed. An apparatus may include an electrically conductive material defining a continuous path for electrical current to flow between a first and a second location. The continuous path may include a first path portion, defined as a generally clockwise path for the electrical current to flow around a geometric center of the continuous path, and a second path portion, defined as a generally counter-clockwise path for the electrical current to flow around the geometric center. The continuous path may also include a radial-direction-reversal region at which one of the first path portion or the second path portion changes from being defined as a generally outward path for the electrical current to flow away from the geometric center to being defined as a generally inward path for the electrical current to flow toward the geometric center. Related systems, devices, and methods are also disclosed.

公开(公告)号：US20230314120A1

公开(公告)日：2023-10-05

申请号：US18194448

申请日：2023-03-31

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga

IPC: G01B7/30 ,  G01D5/20

CPC classification number: G01B7/30 ,  G01D5/20

Abstract: Various examples include a target for inductive angular-position sensing and an inductive angular-position sensor including the same. The target has a target body comprising an inner circular ring around a center axis, and multiple fins formed with and extending radially from portions of the inner circular ring and equally-radially spaced around the center axis. Respective ones of the multiple fins are formed as an arc band-shaped ring. In one or more examples, the respective ones of the multiple fins formed as the arc band-shaped ring provide a current path for an eddy current for the inductive angular-position sensing.

公开(公告)号：US20220397427A1

公开(公告)日：2022-12-15

申请号：US17648743

申请日：2022-01-24

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga ,  Surendra Akkina ,  Sudheer Puttapudi

IPC: G01D5/22

Abstract: An apparatus for inductive linear-position sensing is disclosed. An apparatus may include a support structure and an electrically conductive material defining a continuous path for electrical current to flow between a first location and a second location. The continuous path may include: a first path portion defining a first spiraling path for the electrical current to flow in a clockwise direction around a first axis; a second path portion laterally spaced from the first path portion and defining a second spiraling path for the electrical current to flow in a counter-clockwise direction around a second axis; a first coupling portion coupling an inner portion of the first path portion to an inner portion of the second path portion; and a second coupling portion coupling an outer portion of the second path portion to an outer portion of the first path portion. Related systems, devices, and methods are also disclosed.

公开(公告)号：US20240288286A1

公开(公告)日：2024-08-29

申请号：US18585873

申请日：2024-02-23

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga ,  Surendra Akkina ,  Sudheer Putttapudi

IPC: G01D5/20 ,  G01B7/30

CPC classification number: G01D5/20 ,  G01B7/30

Abstract: An apparatus comprises a support structure, one or more oscillator coils, a first sense coil, and a second sense coil. The one or more oscillator coils have a circular winding pattern around an axis of rotation for a target. The first sense coil has a coil winding pattern arranged around the axis and surrounded by the circular winding pattern of the one or more oscillator coils. The second sense coil has a coil winding pattern arranged around the axis and surrounded by the circular winding pattern of the one or more oscillator coils. The coil winding pattern of the second sense coil offset from the coil winding pattern of the first sense coil by an angle of substantially Φ degrees, where Φ=60°/N, and N is an integer number of pole pairs of the apparatus.

公开(公告)号：US20230314180A1

公开(公告)日：2023-10-05

申请号：US18048627

申请日：2022-10-21

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga

IPC: G01D5/20

CPC classification number: G01D5/202

Abstract: Various examples include a target for an inductive angular-position sensor. The target may rotate about a center axis and may include a number of fins respectively including a respective outer-circumferential edge to overlap a respective first arc at least partially defining a first circle centered at the center axis. A respective first central angle of the respective first arc substantially equal to 360° divided by twice a count of the fins. The number of fins may respectively include a respective inner-circumferential edge, positioned closer to the center axis than the respective outer-circumferential edge is to the center axis. The respective inner-circumferential edge may overlap a respective second arc at least partially defining a second circle centered at the center axis. A respective second central angle of the respective second arc substantially equal to 360° divided by the count of the fins. Related devices, systems and methods are also disclosed.

公开(公告)号：US12203780B2

公开(公告)日：2025-01-21

申请号：US18048627

申请日：2022-10-21

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga

IPC: G01D5/20

Abstract: Various examples include a target for an inductive angular-position sensor. The target may rotate about a center axis and may include a number of fins respectively including a respective outer-circumferential edge to overlap a respective first arc at least partially defining a first circle centered at the center axis. A respective first central angle of the respective first arc substantially equal to 360° divided by twice a count of the fins. The number of fins may respectively include a respective inner-circumferential edge, positioned closer to the center axis than the respective outer-circumferential edge is to the center axis. The respective inner-circumferential edge may overlap a respective second arc at least partially defining a second circle centered at the center axis. A respective second central angle of the respective second arc substantially equal to 360° divided by the count of the fins. Related devices, systems and methods are also disclosed.

公开(公告)号：US20240361119A9

公开(公告)日：2024-10-31

申请号：US18490039

申请日：2023-10-19

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga ,  Kevin Mark Smith ,  Hwangsoo Choi ,  Surendra Akkina ,  Sudheer Puttapudi

IPC: G01B7/30 ,  G01D5/20

CPC classification number: G01B7/30 ,  G01D5/20

Abstract: An apparatus comprises a target to rotate about an axis; an excitation coil to carry an excitation signal; and a first sense coil to carry a sense signal induced by the excitation signal. The first sense coil comprises two or more lobes in one or more planes that are perpendicular to the axis. The two or more lobes comprise a first lobe at a first position relative to the axis and a second lobe at a second position relative to the axis. The second position is substantially the same radial distance from the axis as the first position is from the axis. The second position is at an angular distance of Θ from the first position, where Θ=180°±α/2, and α is a measurement range for angular-position sensing (e.g., α=60°) within a range of 50% to 150% of α.

公开(公告)号：US20240280382A1

公开(公告)日：2024-08-22

申请号：US18443804

申请日：2024-02-16

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga ,  Surendra Akkina ,  Sudheer Puttapudi

IPC: G01D5/20

CPC classification number: G01D5/20

Abstract: An apparatus comprises a support structure; a first sense coil comprising a sine coil arranged about a longitudinal axis of the support structure, the sine coil having opposing ends between opposing ends of the support structure, the sine coil defining at least a first lobe and a second lobe; a second sense coil comprising a cosine coil arranged about the longitudinal axis of the support structure, the cosine coil having opposing ends between the opposing ends of the support structure, the cosine coil defining first lobe portions coextensive with the first lobe of the sine coil and second lobe portions coextensive with the second lobe of the sine coil; and one or more oscillator coils arranged around the sine and the cosine coils. A coil area of the first lobe of the sine coil is less than a coil area of the first lobe portions of the cosine coil.

公开(公告)号：US20240133669A1

公开(公告)日：2024-04-25

申请号：US18490039

申请日：2023-10-18

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga ,  Kevin Mark Smith ,  Hwangsoo Choi ,  Surendra Akkina ,  Sudhneer Puttapudi

IPC: G01B7/30 ,  G01D5/20

CPC classification number: G01B7/30 ,  G01D5/20

Abstract: An apparatus comprises a target to rotate about an axis; an excitation coil to carry an excitation signal; and a first sense coil to carry a sense signal induced by the excitation signal. The first sense coil comprises two or more lobes in one or more planes that are perpendicular to the axis. The two or more lobes comprise a first lobe at a first position relative to the axis and a second lobe at a second position relative to the axis. The second position is substantially the same radial distance from the axis as the first position is from the axis. The second position is at an angular distance of Θ from the first position, where Θ=180°±α/2, and α is a measurement range for angular-position sensing (e.g., α=60°) within a range of 50% to 150% of α.

公开(公告)号：US20230045209A1

公开(公告)日：2023-02-09

申请号：US17808600

申请日：2022-06-24

Applicant: Microchip Technology Incorporated

Inventor： Ganesh Shaga

IPC: G01B7/30 ,  G01D5/20

Abstract: Examples disclosed herein relate generally to inductive angular-position sensors. An example apparatus may include a support structure, a first inductive angular-position sensor, a second inductive angular-position sensor, and a shield. The first inductive angular-position sensor may include a respective first sense coil arranged at a first portion of the support structure. The respective first sense coil may at least partially circumscribe an axis. The second inductive angular-position sensor may include a respective first sense coil arranged opposite the first sense coil of the first inductive angular-position sensor at a second portion of the support structure. The first sense coil of the first inductive angular-position sensor may at least partially circumscribe the axis. The shield may be arranged between the first sense coil of the first inductive angular-position sensor and the first sense coil of the second inductive angular-position sensor.