Patents by Inventor Ajith Balachandran
Ajith Balachandran 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).
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Patent number: 11870309Abstract: An integrated motor and motor drive arrangement includes a motor having a stator, and a rotor, rotatable relative to the stator to drive a load, the rotor being arranged radially outside the stator, and the stator having an inner surface defining a radially inner space, the motor arrangement further comprising: motor drive components mounted to the inner surface of the stator within the radially inner space.Type: GrantFiled: February 4, 2022Date of Patent: January 9, 2024Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Ajith Balachandran, Thilak Durairaj, Mark Downes, Edward G C Pocock, Ashishkumar Parekh, Kalyani Menon
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Patent number: 11594949Abstract: A power converter assembly comprises a plurality of power converter channels each arranged to provide a three-phase output to an electrical machine having a multiple of three-phase windings. The power converter assembly further comprises control means arranged to provide a torque demand signal to the plurality of power converter channels to provide, together, a desired torque output to drive the machine and a temperature sensing means to detect temperature in the power channels and/or at the windings of the machine. The control means is arranged to determine the proportion of the desired torque output to be provided by each channel based on the detected temperature.Type: GrantFiled: August 27, 2020Date of Patent: February 28, 2023Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Ajith Balachandran, Stephen Minshull
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Publication number: 20220255406Abstract: An integrated motor and motor drive arrangement includes a motor having a stator, and a rotor, rotatable relative to the stator to drive a load, the rotor being arranged radially outside the stator, and the stator having an inner surface defining a radially inner space, the motor arrangement further comprising: motor drive components mounted to the inner surface of the stator within the radially inner space.Type: ApplicationFiled: February 4, 2022Publication date: August 11, 2022Inventors: Ajith BALACHANDRAN, Thilak DURAIRAJ, Mark DOWNES, Edward G C POCOCK, Ashishkumar PAREKH, Kalyani MENON
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Publication number: 20210206499Abstract: An electric propulsion system for an aircraft comprises a plurality of propulsion modules. Each propulsion module comprises a motor, an energy store configured to supply electrical energy to the motor, and a controller configured to control the motor and the energy store. Each propulsion module is configured such that the motor of the propulsion module receives electrical energy only from the energy store of the propulsion module.Type: ApplicationFiled: December 28, 2020Publication date: July 8, 2021Inventors: Ajith BALACHANDRAN, Kalyani Govindankutty MENON
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Publication number: 20210167682Abstract: A power converter assembly comprises a plurality of power converter channels each arranged to provide a three-phase output to an electrical machine having a multiple of three-phase windings. The power converter assembly further comprises control means arranged to provide a torque demand signal to the plurality of power converter channels to provide, together, a desired torque output to drive the machine and a temperature sensing means to detect temperature in the power channels and/or at the windings of the machine. The control means is arranged to determine the proportion of the desired torque output to be provided by each channel based on the detected temperature.Type: ApplicationFiled: August 27, 2020Publication date: June 3, 2021Inventors: Ajith BALACHANDRAN, Stephen MINSHULL
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Patent number: 10055154Abstract: Techniques and components for backing up data are disclosed. A first subset of data units is selected from a plurality of data units of a storage system to create a first partial baseline for backup of the first storage system. The number of data units in the first subset of data units is determined based on a window size parameter n. Data within the storage system that has changed since a previous backup operation are identified. A first backup including the first partial baseline and the first changed data is written to a second storage system. For a data loss event, the techniques include selecting, based on a time of the determined data loss event in combination with n, the first backup and n?1 additional backups, wherein each of the n?1 additional backups include a partial baseline and changed data. The first backup and the n?1 additional backups are written to a third storage system.Type: GrantFiled: November 9, 2017Date of Patent: August 21, 2018Assignee: NetApp, Inc.Inventors: Ajith Balachandran, James Namboorikandathil Joseph, Michael R Eisler, Rahul Pradeep, Somesh Kumar, Vijay Srinath, Yuedong Mu
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Publication number: 20180067669Abstract: Techniques and components for backing up data are disclosed. A first subset of data units is selected from a plurality of data units of a storage system to create a first partial baseline for backup of the first storage system. The number of data units in the first subset of data units is determined based on a window size parameter n. Data within the storage system that has changed since a previous backup operation are identified. A first backup including the first partial baseline and the first changed data is written to a second storage system. For a data loss event, the techniques include selecting, based on a time of the determined data loss event in combination with n, the first backup and n?1 additional backups, wherein each of the n?1 additional backups include a partial baseline and changed data. The first backup and the n?1 additional backups are written to a third storage system.Type: ApplicationFiled: November 9, 2017Publication date: March 8, 2018Inventors: Ajith Balachandran, James Namboorikandathil Joseph, Michael R. Eisler, Rahul Pradeep, Somesh Kumar, Vijay Srinath, Yuedong Mu
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Patent number: 9836230Abstract: First partial baseline data of a first storage system is identified. First changed data of the first storage system is identified. The first changed data comprises data that has changed since a previous point in time. First backup data is written to a second storage system. The first backup data comprises the first partial baseline data and the first changed data. After writing the first backup data to the second storage system, second partial baseline data of the first storage system is identified. The second partial baseline data does not include the first partial baseline data. Second changed data of the first storage system is identified. The second changed data comprises data that has changed since writing the first backup data. Second backup data is written to the second storage system. The second backup data comprises the second partial baseline data and the second changed data.Type: GrantFiled: April 16, 2015Date of Patent: December 5, 2017Assignee: NETAPP, INC.Inventors: Ajith Balachandran, James Namboorikandathil Joseph, Michael R Eisler, Rahul Pradeep, Somesh Kumar, Vijay Srinath, Yuedong Mu
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Publication number: 20160306573Abstract: First partial baseline data of a first storage system is identified. First changed data of the first storage system is identified. The first changed data comprises data that has changed since a previous point in time. First backup data is written to a second storage system. The first backup data comprises the first partial baseline data and the first changed data. After writing the first backup data to the second storage system, second partial baseline data of the first storage system is identified. The second partial baseline data does not include the first partial baseline data. Second changed data of the first storage system is identified. The second changed data comprises data that has changed since writing the first backup data. Second backup data is written to the second storage system. The second backup data comprises the second partial baseline data and the second changed data.Type: ApplicationFiled: April 16, 2015Publication date: October 20, 2016Inventors: Ajith Balachandran, James Namboorikandathil Joseph, Michael R Eisler, Rahul Pradeep, Somesh Kumar, Vijay Srinath, Yuedong Mu
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Patent number: 8225057Abstract: A method implements a single system configuration for backing-up and restoring a clustered storage system. The clustered storage system contains a plurality of storage servers. A virtual volume is configured based on one or more of the plurality of storage servers. The virtual volume shields its physical implementation from a client system. A virtual backup device is configured based on a physical backup device connected with one of the plurality of storage servers. The virtual backup device shields its connectivity from the client system. The method backs-up volume data stored in the virtual volume to the virtual backup device, irrespective of which of the plurality of storage servers is utilized by the virtual volume, or which of the plurality of storage servers is connected with the physical backup device.Type: GrantFiled: March 24, 2009Date of Patent: July 17, 2012Assignee: NetApp, Inc.Inventors: Ling Zheng, Ajith Balachandran