Patents by Inventor Binod Kumar Agrawal
Binod Kumar Agrawal 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: 10224809Abstract: A totem pole power factor correction (PFC) converter is disclosed. The totem pole PFC converter includes a first transistor having a first current terminal coupled to a first node, a first control terminal, and a second current terminal. Also included is a second transistor having a third current terminal coupled to the second current terminal at a second node, a second control terminal, and a fourth current terminal coupled to a third node. A first rectifier is coupled to the first node and a first current sense resistor is coupled between the first rectifier and a fourth node. A second rectifier is coupled to the third node and a second current sense resistor coupled between the second rectifier and the fourth node. A current sense voltage for an analog controller is generated by current alternately flowing through the first current sense resistor and the second current sense resistor.Type: GrantFiled: October 5, 2017Date of Patent: March 5, 2019Assignee: Cree, Inc.Inventors: Binod Kumar Agrawal, Venkata Subash Bathula, Navneet Kumar Mangal, Guy Moxey
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Patent number: 9606564Abstract: A control system for a power converter includes a digital reference signal generator, a first proportional-integral (PI) controller, a second PI controller, and a diode. The digital reference signal generator is configured to operate in a maximum peak power tracking (MPPT) mode of operation and an output voltage control mode of operation. In the MPPT mode of operation, the digital reference signal generator is configured to receive an input voltage and an input current provided to the power converter and provide an input voltage reference signal based on the input voltage and the input current. In the output voltage control mode of operation, the digital reference signal generator is configured to provide a constant input voltage reference signal.Type: GrantFiled: April 6, 2015Date of Patent: March 28, 2017Assignee: Cree, Inc.Inventors: Binod Kumar Agrawal, John Mookken
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Patent number: 9564806Abstract: An apparatus, e.g., a boost converter, includes a first switch configured to be coupled to an inductor and to support a charging current in the inductor from a power source and at least two serially-coupled second switches coupled in parallel with the first switch and configured to selectively route current from the inductor to at least two serially-connected capacitors. The apparatus may further include a control circuit configured to operate the first switch and the plurality of second switches.Type: GrantFiled: September 25, 2013Date of Patent: February 7, 2017Assignee: Cree, Inc.Inventors: Binod Kumar Agrawal, Narasimha Reddy Bommireddy
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Publication number: 20160291627Abstract: A control system for a power converter includes a digital reference signal generator, a first proportional-integral (PI) controller, a second PI controller, and a diode. The digital reference signal generator is configured to operate in a maximum peak power tracking (MPPT) mode of operation and an output voltage control mode of operation. In the MPPT mode of operation, the digital reference signal generator is configured to receive an input voltage and an input current provided to the power converter and provide an input voltage reference signal based on the input voltage and the input current. In the output voltage control mode of operation, the digital reference signal generator is configured to provide a constant input voltage reference signal.Type: ApplicationFiled: April 6, 2015Publication date: October 6, 2016Inventors: Binod Kumar Agrawal, John Mookken
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Publication number: 20150162635Abstract: A controller for controlling a flow cell battery system is provided. The controller operates the flow cell battery system in a plurality of states including a plating state, a charging state and a discharge state.Type: ApplicationFiled: February 19, 2015Publication date: June 11, 2015Inventors: Gopalakrishnan R. Parakulam, Saroj Kumar Sahu, Ali Firouzi, Rick Winter, Jagat Banerjee, Binod Kumar Agrawal, PandariNath Siddineni
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Patent number: 9035617Abstract: A controller for controlling a flow cell battery system is provided. The controller operates the flow cell battery system in a plurality of states including a plating state, a charging state and a discharge state.Type: GrantFiled: November 18, 2013Date of Patent: May 19, 2015Assignee: Imergy Power Systems, Inc.Inventors: Gopalakrishnan R. Parakulam, Saroj Kumar Sahu, Ali Firouzi, Rick Winter, Jagat Banerjee, Binod Kumar Agrawal, PandariNath Siddineni
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Publication number: 20150084611Abstract: An apparatus, e.g., a boost converter, includes a first switch configured to be coupled to an inductor and to support a charging current in the inductor from a power source and at least two serially-coupled second switches coupled in parallel with the first switch and configured to selectively route current from the inductor to at least two serially-connected capacitors. The apparatus may further include a control circuit configured to operate the first switch and the plurality of second switches.Type: ApplicationFiled: September 25, 2013Publication date: March 26, 2015Applicant: Cree, Inc.Inventors: Binod Kumar Agrawal, Narasimha Reddy Bommireddy
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Publication number: 20140285023Abstract: Control hubs and solar power systems are disclosed. One example photovoltaic (PV) system includes a plurality of PV modules and a control hub coupled to the plurality of PV modules. The control hub includes a plurality of interface modules and a processing device coupled to the interface modules. Each of the interface modules includes a power converter coupled to a different one of the plurality of PV modules. The processing device is configured to control each of the power converters to control the PV module associated with the power converter.Type: ApplicationFiled: May 4, 2012Publication date: September 25, 2014Inventors: Gopal K. Garg, Binod Kumar Agrawal, Stephen J. Voss
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Publication number: 20140139190Abstract: A controller for controlling a flow cell battery system is provided. The controller operates the flow cell battery system in a plurality of states including a plating state, a charging state and a discharge state.Type: ApplicationFiled: November 18, 2013Publication date: May 22, 2014Applicant: Deeya Energy, Inc.Inventors: Gopalakrishnan R. PARAKULAM, Saroj Kumar Sahu, Ali Firouzi, Rick Winter, Jagat Banerjee, Binod Kumar Agrawal, PandariNath Siddineni
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Patent number: 8723489Abstract: In accordance with some embodiments, a buck-boost circuit is contemplated which is bi-directional. That is, the buck-boost circuit be configured to produce a load voltage for a load responsive to a source voltage from a voltage source, and the buck-boost circuit may also be configured to produce a charging voltage for the voltage source responsive to a second voltage source connected to the load. In an embodiment, the buck-boost circuit may be operating in boost mode when providing the load voltage and may be operating in buck mode when providing the charging voltage.Type: GrantFiled: May 28, 2010Date of Patent: May 13, 2014Assignee: Deeya Energy, Inc.Inventors: Gopalakrishnan R. Parakulam, Binod Kumar Agrawal, Saroj Kumar Sahu
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Publication number: 20110080143Abstract: In accordance with some embodiments, a buck-boost circuit is contemplated which is bi-directional. That is, the buck-boost circuit be configured to produce a load voltage for a load responsive to a source voltage from a voltage source, and the buck-boost circuit may also be configured to produce a charging voltage for the voltage source responsive to a second voltage source connected to the load. In an embodiment, the buck-boost circuit may be operating in boost mode when providing the load voltage and may be operating in buck mode when providing the charging voltage.Type: ApplicationFiled: May 28, 2010Publication date: April 7, 2011Inventors: Gopalakrishnan R. Parakulam, Binod Kumar Agrawal, Saroj Kumar Sahu
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Patent number: 6095005Abstract: A differential mechanism, connected to a driveshaft, transmits power to two halfshafts laterally directed toward the driven wheels of a motor vehicle. Each halfshaft is driveably connected to a pinion, which continually engages a gear fixed to an axle shaft, the pinion and gear forming a speed reduction gearset located between the halfshaft and axle shaft. Each gearset is located in a drop gear housing. Opposite axial ends of each halfshaft are fixed to a differential housing and the drop gear housing. Two extension tubes, each press fitted in the differential housing and a corresponding drop gear housing, provide structural continuity therebetween.Type: GrantFiled: October 15, 1998Date of Patent: August 1, 2000Assignee: Ford Motor CompanyInventors: John H. Tanzer, Tim Howard, Binod Kumar Agrawal