Patents by Inventor Harish Suryanarayana
Harish Suryanarayana 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: 11955835Abstract: A system includes: a ring bus; a plurality of static uninterruptible power supplies (UPSs), each static UPS of the plurality of static UPSs including: at least one battery; an input that is electrically connected to a first external electrical power source; and an output that is electrically connected to a load, and, via a first corresponding choke, to the ring bus; at least one fuel-cell interface converter (FIC) that converts direct current (DC) electrical power to alternating current (AC) electrical power, each FIC of the at least one FIC being electrically connected to the ring bus via a second corresponding choke; and a fuel cell module corresponding to and electrically connected to each FIC, the fuel cell module including a fuel cell.Type: GrantFiled: October 13, 2021Date of Patent: April 9, 2024Assignee: ABB Schweiz AGInventors: Harish Suryanarayana, Li Qi, Taosha Jiang, Yuzhi Zhang, Silvio Colombi
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Publication number: 20230229220Abstract: A method for predicting power converter health is provided. The method comprises receiving a plurality of parameter measurements associated with a power converter system comprising a power converter. The plurality of parameter measurements comprises a first set of system measurements and a second set of failure precursor measurements. The method further comprises inputting the first set of system measurements into a first machine learning algorithm to generate expected failure precursor measurement information and inputting the expected failure precursor measurement information and the second set of failure precursor measurements into a second machine learning algorithm to generate component failure prediction information. The method also comprises performing one or more actions based on the generated component failure prediction information.Type: ApplicationFiled: January 18, 2022Publication date: July 20, 2023Applicant: ABB Schweiz AGInventors: Harish Suryanarayana, Goran Mandic, Eddy C. Aeloiza
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Patent number: 11682920Abstract: A method of operating a static transfer switch is provided. The method includes monitoring a voltage waveform for each phase of first and second power sources, and calculating flux for each phase of the power sources. The method also includes determining (i) a first flux difference between the respective flux of the first phases of the first and second power sources, (ii) a second flux difference between the respective flux of the second phases of the first and second power sources, and (iii) a third flux difference between the respective flux of the third phases of the first and second power sources. The method further includes turning off a third solid-state switch to disconnect the third phase of the first power source from a load, in response to the controller determining that the third flux difference is greater the first and second flux differences.Type: GrantFiled: December 13, 2021Date of Patent: June 20, 2023Assignee: ABB Schweiz AGInventors: Yuzhi Zhang, Yu Du, Xiaoqing Song, Harish Suryanarayana, Veerakumar Bose, Thomas Anthony Kendzia, III, Harshang Shah, Christopher Alan Belcastro
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Publication number: 20230187963Abstract: A method of operating a static transfer switch is provided. The method includes monitoring a voltage waveform for each phase of first and second power sources, and calculating flux for each phase of the power sources. The method also includes determining (i) a first flux difference between the respective flux of the first phases of the first and second power sources, (ii) a second flux difference between the respective flux of the second phases of the first and second power sources, and (iii) a third flux difference between the respective flux of the third phases of the first and second power sources. The method further includes turning off a third solid-state switch to disconnect the third phase of the first power source from a load, in response to the controller determining that the third flux difference is greater the first and second flux differences.Type: ApplicationFiled: December 13, 2021Publication date: June 15, 2023Inventors: Yuzhi Zhang, Yu Du, Xiaoqing Song, Harish Suryanarayana, Veerakumar Bose, Thomas Anthony Kendzia, III, Harshang Shah, Christopher Alan Belcastro
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Publication number: 20230115739Abstract: A system includes: a ring bus; a plurality of static uninterruptible power supplies (UPSs), each static UPS of the plurality of static UPSs including: at least one battery; an input that is electrically connected to a first external electrical power source; and an output that is electrically connected to a load, and, via a first corresponding choke, to the ring bus; at least one fuel-cell interface converter (FIC) that converts direct current (DC) electrical power to alternating current (AC) electrical power, each FIC of the at least one FIC being electrically connected to the ring bus via a second corresponding choke; and a fuel cell module corresponding to and electrically connected to each FIC, the fuel cell module including a fuel cell.Type: ApplicationFiled: October 13, 2021Publication date: April 13, 2023Applicant: ABB Schweiz AGInventors: Harish Suryanarayana, Li Qi, Taosha Jiang, Yuzhi Zhang, Silvio Colombi
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Patent number: 11183322Abstract: Unique systems, methods, techniques and apparatuses for a ZVT ZCT resonant converter with a variable resonant tank are disclosed. One exemplary embodiment is a system comprising a bidirectional resonant converter comprising an input/output terminal, a switching device coupled with the input/output terminal, a resonant circuit coupled with the switching device and including a variable inductor, an output/input terminal coupled with the resonant circuit, and a DC biasing circuit operatively coupled with the variable inductor. The variable inductor comprises a toroidal core, a first winding wound around the toroidal core and coupled with the switching device and the output/input terminal, a second core structured to overlap a portion of the toroidal core, and a second winding wound around the second core and coupled with the DC biasing circuit. The DC biasing circuit is controllable to vary the inductance of the variable inductor by saturating a portion of the toroidal core.Type: GrantFiled: April 20, 2018Date of Patent: November 23, 2021Assignee: ABB Schweiz AGInventors: Harish Suryanarayana, Jiaqi Liang, Jukka Pekka Kittila, Wen Ouyang
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Patent number: 10461651Abstract: Unique systems, methods, techniques and apparatuses of a power converter are disclosed. One exemplary embodiment is a resonant power converter comprising a DC bus, a primary leg, an auxiliary leg, and an LC resonant circuit. The auxiliary leg is coupled between DC bus and includes a first auxiliary switch and a second auxiliary switch coupled at an auxiliary midpoint connection. The LC resonant circuit includes an air-core resonant inductor and a resonant capacitor coupled between the auxiliary midpoint connection and a primary midpoint connection of the primary leg. A controller is structured to control the first and second auxiliary switch and the first and second primary switch so as to provide resonant operation of the LC resonant circuit effective to provide a substantially zero voltage condition across the first and second primary switch while toggling the switches.Type: GrantFiled: December 5, 2017Date of Patent: October 29, 2019Assignee: ABB Schweiz AGInventor: Harish Suryanarayana
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Patent number: 10348093Abstract: Unique systems, methods, techniques and apparatuses of a power collection system are disclosed herein. One exemplary embodiment is an MVDC collection system coupled to a utility grid including a collection bus, a plurality of branches coupled to the collection bus, and a branch controller. Each of the plurality of branches include a semiconductor switch coupled to the collection bus, and a DC/DC converter coupled to the semiconductor switch and an LVDC power source. The branch controller configured to determine a fault condition is occurring within the MVDC collection system, determine the location of the fault condition, and isolate the fault condition using at least one of the semiconductor switches and the DC/DC converters.Type: GrantFiled: December 14, 2016Date of Patent: July 9, 2019Assignee: ABB Schweiz AGInventors: Harish Suryanarayana, Hongrae Kim, Sara Ahmed, Peter Steimer, Philippe Maibach, Hans Krattiger, Silverio Alvarez, Paolo Casini, Jiuping Pan
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Publication number: 20190173388Abstract: Unique systems, methods, techniques and apparatuses of a power converter are disclosed. One exemplary embodiment is a resonant power converter comprising a DC bus, a primary leg, an auxiliary leg, and an LC resonant circuit. The auxiliary leg is coupled between DC bus and includes a first auxiliary switch and a second auxiliary switch coupled at an auxiliary midpoint connection. The LC resonant circuit includes an air-core resonant inductor and a resonant capacitor coupled between the auxiliary midpoint connection and a primary midpoint connection of the primary leg. A controller is structured to control the first and second auxiliary switch and the first and second primary switch so as to provide resonant operation of the LC resonant circuit effective to provide a substantially zero voltage condition across the first and second primary switch while toggling the switches.Type: ApplicationFiled: December 5, 2017Publication date: June 6, 2019Inventor: Harish Suryanarayana
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Publication number: 20180241300Abstract: Unique systems, methods, techniques and apparatuses for a ZVT ZCT resonant converter with a variable resonant tank are disclosed. One exemplary embodiment is a system comprising a bidirectional resonant converter comprising an input/output terminal, a switching device coupled with the input/output terminal, a resonant circuit coupled with the switching device and including a variable inductor, an output/input terminal coupled with the resonant circuit, and a DC biasing circuit operatively coupled with the variable inductor. The variable inductor comprises a toroidal core, a first winding wound around the toroidal core and coupled with the switching device and the output/input terminal, a second core structured to overlap a portion of the toroidal core, and a second winding wound around the second core and coupled with the DC biasing circuit. The DC biasing circuit is controllable to vary the inductance of the variable inductor by saturating a portion of the toroidal core.Type: ApplicationFiled: April 20, 2018Publication date: August 23, 2018Inventors: Harish Suryanarayana, Jiaqi Liang, Jukka Pekka Kittila, Wen Ouyang
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Publication number: 20180166881Abstract: Unique systems, methods, techniques and apparatuses of a power collection system are disclosed herein. One exemplary embodiment is an MVDC collection system coupled to a utility grid including a collection bus, a plurality of branches coupled to the collection bus, and a branch controller. Each of the plurality of branches include a semiconductor switch coupled to the collection bus, and a DC/DC converter coupled to the semiconductor switch and an LVDC power source. The branch controller configured to determine a fault condition is occurring within the MVDC collection system, determine the location of the fault condition, and isolate the fault condition using at least one of the semiconductor switches and the DC/DC converters.Type: ApplicationFiled: December 14, 2016Publication date: June 14, 2018Inventors: Harish Suryanarayana, Hongrae Kim, Sara Ahmed, Peter Steimer, Philippe Maibach, Hans Krattiger, Silverio Alvarez, Paolo Casini, Jiuping Pan
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Patent number: 9979273Abstract: Unique systems, methods, techniques and apparatuses for a ZVT ZCT resonant converter with a variable resonant tank are disclosed. One exemplary embodiment is a system comprising a bidirectional resonant converter comprising an input/output terminal, a switching device coupled with the input/output terminal, a resonant circuit coupled with the switching device and including a variable inductor, an output/input terminal coupled with the resonant circuit, and a DC biasing circuit operatively coupled with the variable inductor. The variable inductor comprises a toroidal core, a first winding wound around the toroidal core and coupled with the switching device and the output/input terminal, a second core structured to overlap a portion of the toroidal core, and a second winding wound around the second core and coupled with the DC biasing circuit. The DC biasing circuit is controllable to vary the inductance of the variable inductor by saturating a portion of the toroidal core.Type: GrantFiled: May 19, 2016Date of Patent: May 22, 2018Assignee: ABB Schweiz AGInventors: Harish Suryanarayana, Jiaqi Liang, Jukka-Pekka Kittila, Wen Ouyang
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Patent number: 9871467Abstract: Unique systems, methods, techniques and apparatuses of zero-voltage transition pulse width modulation resonant converters are disclosed. One exemplary embodiment is a zero-voltage transition PWM resonant converter comprising a DC bus, a first switching device, a second switching device, a resonant tank circuit, an auxiliary circuit having a flying capacitor and a plurality of auxiliary switching devices, and a controller. The controller is structured to control the first switching device, the second switching device, and the plurality of auxiliary switching devices to provide resonant operation of the tank circuit effective to provide a substantially zero voltage condition across the first switching device when turning the first switching device on or off and to provide a substantially zero voltage condition across the second switching device when turning the second switching device on or off.Type: GrantFiled: May 19, 2016Date of Patent: January 16, 2018Assignee: ABB Schweiz AGInventors: Jiaqi Liang, Harish Suryanarayana, Jukka-Pekka Kittila
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Publication number: 20170338748Abstract: Unique systems, methods, techniques and apparatuses of zero-voltage transition pulse width modulation resonant converters are disclosed. One exemplary embodiment is a zero-voltage transition PWM resonant converter comprising a DC bus, a first switching device, a second switching device, a resonant tank circuit, an auxiliary circuit having a flying capacitor and a plurality of auxiliary switching devices, and a controller. The controller is structured to control the first switching device, the second switching device, and the plurality of auxiliary switching devices to provide resonant operation of the tank circuit effective to provide a substantially zero voltage condition across the first switching device when turning the first switching device on or off and to provide a substantially zero voltage condition across the second switching device when turning the second switching device on or off.Type: ApplicationFiled: May 19, 2016Publication date: November 23, 2017Inventors: Jiaqi Liang, Harish Suryanarayana, Jukka-Pekka Kittila
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Publication number: 20170338730Abstract: Unique systems, methods, techniques and apparatuses for a ZVT ZCT resonant converter with a variable resonant tank are disclosed. One exemplary embodiment is a system comprising a bidirectional resonant converter comprising an input/output terminal, a switching device coupled with the input/output terminal, a resonant circuit coupled with the switching device and including a variable inductor, an output/input terminal coupled with the resonant circuit, and a DC biasing circuit operatively coupled with the variable inductor. The variable inductor comprises a toroidal core, a first winding wound around the toroidal core and coupled with the switching device and the output/input terminal, a second core structured to overlap a portion of the toroidal core, and a second winding wound around the second core and coupled with the DC biasing circuit. The DC biasing circuit is controllable to vary the inductance of the variable inductor by saturating a portion of the toroidal core.Type: ApplicationFiled: May 19, 2016Publication date: November 23, 2017Inventors: Harish Suryanarayana, Jiaqi Liang, Jukka-Pekka Kittila, Wen Ouyang