Patents by Inventor Misha Kumar
Misha Kumar 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: 11888404Abstract: A bidirectional DC-DC converter with three or more ports is described along with a method of operation thereof. The converter utilizes a common transformer for all ports and allows for power transfer from any port to any or all of the remaining ports. The converter may utilize a controller which implements variable-frequency control, delay-time control, and/or phase-delay control to achieve power transfer as desired between the converter ports. In some cases, power transfer between ports can operate similar to a series-resonant converter or a dual active bridge converter.Type: GrantFiled: January 3, 2023Date of Patent: January 30, 2024Assignee: Delta Electronics, Inc.Inventors: Misha Kumar, Yungtaek Jang, Peter Barbosa, Minli Jia, Hao Sun
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Publication number: 20240014743Abstract: A novel phase-shift based modulation strategy is disclosed that enables a DC-DC converter to operate with zero voltage-switching (ZVS) across wide voltage and power range. The converter operates at a fixed fundamental frequency, with the output current controlled based on an amount of phase shift of the fundamental component at the output of an inverter portion of the converter. To achieve soft switching a rectifier portion of the converter is controlled to phase shift the fundamental component of the rectifier voltage observed at a rectifier reference terminal. More specifically, by requiring a phase shift of the voltage at the rectifier terminal relative to the output voltage of the inverter, the inverter current is such that ZVS is achieved. A converter and method are provided to implement DC-DC conversion with soft switching.Type: ApplicationFiled: July 8, 2022Publication date: January 11, 2024Applicant: Delta Electronics, Inc.Inventors: Satyaki MUKHERJEE, Chi ZHANG, Tomas SADILEK, Misha KUMAR, Boyi ZHANG, Peter Mantovanelli BARBOSA
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Patent number: 11777417Abstract: A power converter and a control method thereof are provided. The power converter includes a primary side switching circuit, a secondary side switching circuit, a transformer, and a control circuit. The primary side switching circuit includes a first set of switches. The secondary side switching circuit includes a second set of switches. The transformer is coupled between the primary side switching circuit and the secondary side switching circuit. The control circuit is configured to control power transfer between the primary side switching circuit and the secondary side switching circuit by controlling the first and second sets of switches. The control circuit is adapted to enable and disable the first and second sets of switches in an enabling duration and a disabling duration respectively and alternatively.Type: GrantFiled: January 19, 2023Date of Patent: October 3, 2023Assignee: DELTA ELECTRONICS, INC.Inventors: Misha Kumar, Yungtaek Jang
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Patent number: 11777413Abstract: A DC/DC converter may be formed out of the combination of a first converter that is optimized to transfer energy from a voltage source to a load, and a second converter that receives a control signal derived from the load voltage to regulate the load voltage. The DC/DC converter may be configured as a sigma converter, a delta converter, or a sigma-delta converter. The mode of operation being selected according to the source voltage or the load voltage, either of which may vary over a wide range.Type: GrantFiled: June 14, 2021Date of Patent: October 3, 2023Assignee: DELTA ELECTRONICS, INC.Inventors: Laszlo Huber, Tomas Sadilek, Misha Kumar, Zhiyu Shen, Jinfa Zhang, Chia-Hsiong Huang, Peter Mantovanelli Barbosa
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Publication number: 20230155517Abstract: A power converter and a control method thereof are provided. The power converter includes a primary side switching circuit, a secondary side switching circuit, a transformer, and a control circuit. The primary side switching circuit includes a first set of switches. The secondary side switching circuit includes a second set of switches. The transformer is coupled between the primary side switching circuit and the secondary side switching circuit. The control circuit is configured to control power transfer between the primary side switching circuit and the secondary side switching circuit by controlling the first and second sets of switches. The control circuit is adapted to enable and disable the first and second sets of switches in an enabling duration and a disabling duration respectively and alternatively.Type: ApplicationFiled: January 19, 2023Publication date: May 18, 2023Inventors: Misha Kumar, Yungtaek Jang
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Publication number: 20230136629Abstract: A bidirectional DC-DC converter with three or more ports is described along with a method of operation thereof. The converter utilizes a common transformer for all ports and allows for power transfer from any port to any or all of the remaining ports. The converter may utilize a controller which implements variable-frequency control, delay-time control, and/or phase-delay control to achieve power transfer as desired between the converter ports. In some cases, power transfer between ports can operate similar to a series-resonant converter or a dual active bridge converter.Type: ApplicationFiled: January 3, 2023Publication date: May 4, 2023Inventors: Misha Kumar, Yungtaek Jang, Peter Barbosa, Minli Jia, Hao Sun
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Patent number: 11594976Abstract: A power converter and a control method thereof are provided. The power converter includes a primary side switching circuit, a secondary side switching circuit, a transformer, and a control circuit. The primary side switching circuit includes a first set of switches. The secondary side switching circuit includes a second set of switches. The transformer is coupled between the primary side switching circuit and the secondary side switching circuit. The control circuit is configured to control power transfer between the primary side switching circuit and the secondary side switching circuit by controlling the first and second sets of switches. The control circuit is adapted to enable and disable the first and second sets of switches in an enabling duration and a disabling duration respectively and alternatively.Type: GrantFiled: September 28, 2020Date of Patent: February 28, 2023Assignee: DELTA ELECTRONICS, INC.Inventors: Misha Kumar, Yungtaek Jang
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Patent number: 11594973Abstract: A bidirectional DC-DC converter with three or more ports is described along with a method of operation thereof. The converter utilizes a common transformer for all ports and allows for power transfer from any port to any or all of the remaining ports. The converter may utilize a controller which implements variable-frequency control, delay-time control, and/or phase-delay control to achieve power transfer as desired between the converter ports. In some cases, power transfer between ports can operate similar to a series-resonant converter or a dual active bridge converter.Type: GrantFiled: December 16, 2020Date of Patent: February 28, 2023Assignee: Delta Electronics Inc.Inventors: Misha Kumar, Yungtaek Jang, Peter Mantovanelli Barbosa, Minli Jia, Hao Sun
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Publication number: 20220149744Abstract: A DC/DC converter may be formed out of the combination of a first converter that is optimized to transfer energy from a voltage source to a load, and a second converter that receives a control signal derived from the load voltage to regulate the load voltage. The DC/DC converter may be configured as a sigma converter, a delta converter, or a sigma-delta converter. The mode of operation being selected according to the source voltage or the load voltage, either of which may vary over a wide range.Type: ApplicationFiled: June 14, 2021Publication date: May 12, 2022Inventors: Laszlo Huber, Tomas Sadilek, Misha Kumar, Zhiyu Shen, Jinfa Zhang, Chia-Hsiong Huang, Peter Mantovanelli Barbosa
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Publication number: 20220045618Abstract: A bidirectional DC-DC converter with three or more ports is described along with a method of operation thereof. The converter utilizes a common transformer for all ports and allows for power transfer from any port to any or all of the remaining ports. The converter may utilize a controller which implements variable-frequency control, delay-time control, and/or phase-delay control to achieve power transfer as desired between the converter ports. In some cases, power transfer between ports can operate similar to a series-resonant converter or a dual active bridge converter.Type: ApplicationFiled: December 16, 2020Publication date: February 10, 2022Applicant: Delta Electronics, Inc.Inventors: Misha Kumar, Yungtaek Jang, Peter Mantovanelli Barbosa, Minli Jia, Hao Sun
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Patent number: 11211872Abstract: A boost rectifier that operates with a single-phase input voltage includes (i) an input stage receiving the single-phase input voltage and including first and second input filter capacitors, (ii) a switching converter stage coupled to the input stage and including a rectification circuit and an inductor circuit, series-connected first and second switches providing a common terminal therebetween, and a phase output capacitor, (iii) an output stage that transfers energy stored in the phase output capacitor to an output load, (iv) a decoupling stage that provides high-impedance decoupling between the switching converter stage and the output stage, and (v) a control circuit configured to operate the first and second switches according to an output signal of a non-linear compensation circuit that combines a feedforward signal derived from both the input and output voltages of the boost rectifier with an output voltage feedback control signal.Type: GrantFiled: September 28, 2020Date of Patent: December 28, 2021Assignee: DELTA ELECTRONICS, INC.Inventors: Yungtaek Jang, Misha Kumar, Tomas Sadilek, Peter Barbosa
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Publication number: 20210384840Abstract: A power converter and a control method thereof are provided. The power converter includes a primary side switching circuit, a secondary side switching circuit, a transformer, and a control circuit. The primary side switching circuit includes a first set of switches. The secondary side switching circuit includes a second set of switches. The transformer is coupled between the primary side switching circuit and the secondary side switching circuit. The control circuit is configured to control power transfer between the primary side switching circuit and the secondary side switching circuit by controlling the first and second sets of switches. The control circuit is adapted to enable and disable the first and second sets of switches in an enabling duration and a disabling duration respectively and alternatively.Type: ApplicationFiled: September 28, 2020Publication date: December 9, 2021Inventors: Misha Kumar, Yungtaek Jang
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Patent number: 10753993Abstract: A gradient amplifier driver stage circuit includes: a gradient coil and a plurality of gradient driver modules electrically cascaded with each other and forming an output end, the output end being electrically connected to the gradient coil, wherein each gradient driver module includes a pre-stage power supply and a bridge amplifier connected in parallel, output voltage of the pre-stage power supplies of the plurality of gradient driver modules are the same, and each gradient driver module is configured to provide an inductive voltage drop and a resistive voltage drop on the gradient coil.Type: GrantFiled: January 9, 2019Date of Patent: August 25, 2020Assignee: Delta Electronics (Shanghai) CO., LTDInventors: He Huang, Misha Kumar, Laszlo Huber, Jinzhu Xue, Dezhi Jiao
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Publication number: 20190212403Abstract: The present disclosure provides a gradient amplifier driver stage circuit, a gradient amplifier system and a control method thereof. The gradient amplifier driver stage circuit includes: a gradient coil and a plurality of gradient driver modules electrically cascaded with each other and forming an output end, the output end being electrically connected to the gradient coil, wherein each gradient driver module includes a pre-stage power supply and a bridge amplifier connected in parallel, output voltage of the pre-stage power supplies of the plurality of gradient driver modules are the same, and each gradient driver module is configured to provide an inductive voltage drop and a resistive voltage drop on the gradient coil.Type: ApplicationFiled: January 9, 2019Publication date: July 11, 2019Applicant: Delta Electronics (Shanghai) CO., LTDInventors: He HUANG, Misha Kumar, Laszlo Huber, Jinzhu XUE, Dezhi JIAO