Patents by Inventor Subhashree Rajagopal

Subhashree Rajagopal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11355977
    Abstract: A multi-degree-of-freedom electromagnetic machine includes a spherical structure, a first coil, a second coil, a non-magnetic structure, and a Halbach array. The spherical structure has a first axis of symmetry, a second axis of symmetry, and a third axis of symmetry, and the first, second, and third axes of symmetry are disposed perpendicular to each other. The first coil is wound on the spherical structure about the first axis of symmetry, and the second coil is wound on the spherical structure about the second axis of symmetry. The non-magnetic structure is spaced apart from, and at least partially surrounds, the spherical structure. The Halbach array is mounted on the non-magnetic structure and includes N-magnets, where N is a multiple of 4. The spherical structure and non-magnetic structure are mounted to allow relative rotation between the non-magnetic structure and the spherical structure.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: June 7, 2022
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Subhashree Rajagopal, Deena Dayalan Kothandaraman, Sivanagamalleswara Bavisetti, Govind Yadav, Ramakrishna Rao P. V, Harshit Agrawal
  • Publication number: 20220014085
    Abstract: A hybrid spherical motor includes a first gear box, a second gear box, a yoke arm, a brushless direct current (BLDC) motor, a spherical stator, and a spherical armature. The split armature, in response to the spherical stator being energized, rotates about a first rotational axis, thereby causing the first gear box input connection and the second gear box input connection to rotate about the first rotational axis, and the yoke arm rotates about the first rotational axis in response to the first gear box input connection and the second gear box input connection being rotated about the first rotational axis, whereby the BLDC motor rotates about the first rotational axis.
    Type: Application
    Filed: August 21, 2020
    Publication date: January 13, 2022
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Deepak Pitambar Mahajan, Varun Ananda, Subhashree Rajagopal, Renukaprasad N
  • Publication number: 20210348712
    Abstract: A gimbal assembly is provided that allows for more than a single rotation about a rotational axis in both a first rotational direction and a second rotational direction.
    Type: Application
    Filed: June 29, 2020
    Publication date: November 11, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Jijo Thomas, Ramakrishna Rao P.V, Varun Ananda, Deepak Mahajan, Renukaprasad N, Subhashree Rajagopal, Shouvik Das
  • Patent number: 11171553
    Abstract: A stepper motor includes a rotor, a stator, a plurality of stator windings, and a plurality of permanent magnets. The permanent magnets are coupled to the outer surface of the rotor and are spaced apart from the plurality of stator poles, and each permanent magnet is shaped like an arc having an arc length and is circumferentially spaced apart from two adjacent permanent magnets by a spacing angle. In some instance, the arc length of each permanent magnet is equal, and the spacing angles are not all equal. In other instances, the arc length of two or more of the permanent magnets is unequal to the arc lengths of the other permanent magnets, and the spacing angles are not all equal.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: November 9, 2021
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Deepak Pitambar Mahajan, Sivanagamalleswara Bavisetti, Ramakrishna Rao P. V, Subhashree Rajagopal, Renukaprasad N
  • Publication number: 20210242739
    Abstract: A two degree-of-freedom electromagnetic machine includes an inner stator, a plurality of stator windings, an outer stator, a voice coil winding, a rotor, a plurality of spin magnets, and a plurality of tilt magnets. The plurality of stator windings, when electrically energized, impart a torque on the rotor that causes the rotor to rotate, relative to the inner and outer stators, about a first rotational axis, and the voice coil winding, when electrically energized, imparts a torque on the rotor that causes the rotor to rotate, relative to the inner and outer stators, about a second rotational axis that is perpendicular to the first rotational axis.
    Type: Application
    Filed: April 28, 2020
    Publication date: August 5, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Renukaprasad N, Deepak Mahajan, Govind Yadav, Subhashree Rajagopal
  • Publication number: 20210242728
    Abstract: A two degree-of-freedom brushless DC motor includes a stator, a rotor, a plurality of distributed stator windings, and a stator voice coil winding. The stator includes an inner stator structure and a plurality of arc-shaped stator poles. The inner stator structure includes a main body and a plurality of spokes that are spaced apart from each other to define a plurality of stator slots. Each arc-shaped stator pole is connected to a different one of the spokes. The rotor is spaced apart from the stator, includes a plurality of magnets, and is configured to rotate about a plurality of perpendicular axes. The distributed stator windings are wound around the plurality of spokes and extend through the stator slots. The stator voice coil winding is wound around the outer surfaces of the arc-shaped stator poles. The arc-shape and spacing of the stator poles define the stator as being spherically shaped.
    Type: Application
    Filed: November 9, 2020
    Publication date: August 5, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Subhashree Rajagopal, Pablo Bandera, Govind Yadav, Ramakrishna Rao P.V, Sivanagamalleswara Bavisetti
  • Publication number: 20210234452
    Abstract: A multi degree-of-freedom electromagnetic machine includes an outer case, an inner case, a stator, stator windings, a voice coil winding, a tilt magnet, a rotor, and rotor magnets. The inner case is disposed within an inner cavity of the outer case and is mounted to rotate relative to the outer case about one or more rotational axes. The stator is fixedly mounted within the inner case, and the stator windings are wound thereon. The voice coil winding is fixedly coupled to either the inner surface of the outer case or the outer surface of the inner case. The tilt magnet is fixedly coupled to either the outer surface of the inner case or the inner surface of the outer case. The rotor is rotationally mounted within the inner case and is operable to rotate, relative to the stator, about a rotational axis.
    Type: Application
    Filed: November 9, 2020
    Publication date: July 29, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Ramakrishna Rao P.V, Varun Ananda, Subhashree Rajagopal, Govind Yadav, Renukaprasad N, Deepak Mahajan, Sivanagamalleswara Bavisetti, Jijo Thomas
  • Publication number: 20210234448
    Abstract: A two degree-of-freedom motor includes a stator, a plurality of stator windings, a rotor, a shaft, a limited angle torque motor, and a spring. The stator has a main body and a plurality of stator poles. The stator windings are wound around the stator poles. The rotor is spaced apart from the stator and includes a plurality of magnets and is configured to rotate about a first rotational axis. The shaft is coupled to the rotor and is rotatable therewith and and has a shaft first end and a shaft second end. The limited angle torque motor is coupled to the shaft first end, and is operable to supply a torque that causes the shaft, the rotor, and the stator to rotate about a second rotational axis that is perpendicular to the first rotational axis. The spring is fixedly mounted and is coupled to the limited angle torque motor.
    Type: Application
    Filed: November 9, 2020
    Publication date: July 29, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Sivanagamalleswara Bavisetti, Deepak Mahajan, Renukaprasad N, Subhashree Rajagopal
  • Publication number: 20210234418
    Abstract: A two degree-of-freedom motor includes an inner stator, a plurality of inner stator windings, an inner rotor, an outer stator, a plurality of outer stator windings, an outer rotor, and a shaft. The inner rotor is spaced apart from, and at least partially surrounds, the inner stator, and includes a plurality of magnets. The outer stator is spaced apart from, and at least partially surrounds, the inner stator and the inner rotor. The outer rotor is spaced apart from, and is disposed between, the inner rotor and the outer stator, and has a plurality of outer rotor projections. The shaft is coupled to the inner rotor and the outer rotor.
    Type: Application
    Filed: November 9, 2020
    Publication date: July 29, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Deepak Mahajan, Renukaprasad N, Sivanagamalleswara Bavisetti, Subhashree Rajagopal
  • Publication number: 20210234451
    Abstract: A multi-degree-of-freedom electromagnetic machine includes a spherical stator, an armature, a payload mount assembly, and a payload. The spherical stator has a first axis of symmetry, a second axis of symmetry, and a third axis of symmetry that are disposed perpendicular to each other. The armature is spaced apart from, and surrounds at least a portion of, the spherical stator, and is mounted for rotation about the first and second axes of symmetry. The payload is spaced apart from the spherical stator and the armature and is coupled to the payload mount assembly and is mounted to rotate about a payload rotational axis that is parallel to the first axis of symmetry and perpendicular to the second axis of symmetry. The payload is disposed such that its center of gravity is at a position where the second axis of symmetry and the payload rotational axis intersect.
    Type: Application
    Filed: August 27, 2020
    Publication date: July 29, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Deepak Pitambar Mahajan, Varun Anand, Renukaprasad N, Ramakrishna Rao P.V, Govind Yadav, Subhashree Rajagopal, Jijo Thomas
  • Patent number: 11063504
    Abstract: A multi-degree of freedom electromagnetic machine includes a spherical body, an outer structure, a plurality of magnets, and a plurality of windings. Each of the plurality of windings includes a flexible dielectric substrate and an electrical conductor. The flexible dielectric substrate has an inner surface and an outer surface, and the inner surface of the flexible substrate facies the outer surface of the spherical body. The electrical conductor is disposed on at least one of the inner or outer surfaces of the flexible dielectric substrate.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: July 13, 2021
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Deepak Pitambar Mahajan, Renukaprasad N, Ramakrishna Rao P. V, Subhashree Rajagopal, Govind Yadav
  • Publication number: 20210184521
    Abstract: A multi-degree-of-freedom electromagnetic machine includes a spherical structure, a first coil, a second coil, a non-magnetic structure, and a Halbach array. The spherical structure has a first axis of symmetry, a second axis of symmetry, and a third axis of symmetry, and the first, second, and third axes of symmetry are disposed perpendicular to each other. The first coil is wound on the spherical structure about the first axis of symmetry, and the second coil is wound on the spherical structure about the second axis of symmetry. The non-magnetic structure is spaced apart from, and at least partially surrounds, the spherical structure. The Halbach array is mounted on the non-magnetic structure and includes N-magnets, where N is a multiple of 4. The spherical structure and non-magnetic structure are mounted to allow relative rotation between the non-magnetic structure and the spherical structure.
    Type: Application
    Filed: December 12, 2019
    Publication date: June 17, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Subhashree Rajagopal, Deena Dayalan Kothandaraman, Sivanagamalleswara Bavisetti, Govind Yadav, Ramakrishna Rao P.V, Harshit Agrawal
  • Publication number: 20210028681
    Abstract: A stepper motor includes a rotor, a stator, a plurality of stator windings, and a plurality of permanent magnets. The permanent magnets are coupled to the outer surface of the rotor and are spaced apart from the plurality of stator poles, and each permanent magnet is shaped like an arc having an arc length and is circumferentially spaced apart from two adjacent permanent magnets by a spacing angle. In some instance, the arc length of each permanent magnet is equal, and the spacing angles are not all equal. In other instances, the arc length of two or more of the permanent magnets is unequal to the arc lengths of the other permanent magnets, and the spacing angles are not all equal.
    Type: Application
    Filed: July 22, 2019
    Publication date: January 28, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Deepak Pitambar Mahajan, Sivanagamalleswara Bavisetti, Ramakrishna Rao P.V, Subhashree Rajagopal, Renukaprasad N.
  • Publication number: 20210021187
    Abstract: A multi-degree of freedom electromagnetic machine includes a spherical body, an outer structure, a plurality of magnets, and a plurality of windings. Each of the plurality of windings includes a flexible dielectric substrate and an electrical conductor. The flexible dielectric substrate has an inner surface and an outer surface, and the inner surface of the flexible substrate facies the outer surface of the spherical body. The electrical conductor is disposed on at least one of the inner or outer surfaces of the flexible dielectric substrate.
    Type: Application
    Filed: July 15, 2019
    Publication date: January 21, 2021
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Deepak Pitambar Mahajan, Renukaprasad N, Ramakrishna Rao P.V, Subhashree Rajagopal, Govind Yadav
  • Publication number: 20200343804
    Abstract: A multi-stage spherical motor includes an inner stator, an outer stator, a rotor, and magnets. The inner stator has a plurality of inner stator windings wound thereon. The outer stator is spaced apart from and at least partially surrounds the inner stator, and has a plurality of outer stator windings wound thereon. The rotor is disposed between the inner stator and the outer stator and is configured to rotate about a plurality of perpendicular axes. The rotor has an inner surface and an outer surface. An inner array of magnets is coupled to the inner surface of the rotor, and an outer array of magnets coupled to the outer surface of the rotor. In some embodiments, a multi-stage spherical motor includes an inner rotor, an outer rotor, a stator, inner stator coils, and outer stator coils.
    Type: Application
    Filed: August 27, 2019
    Publication date: October 29, 2020
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Deepak Pitambar Mahajan, Subhashree Rajagopal, Sivanagamalleswara Bavisetti, Renukaprasad N