Patents by Inventor Kum Kang Huh
Kum Kang Huh 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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Publication number: 20220321039Abstract: A method for preventing damage in a bearing of a generator of an electrical power system includes monitoring one or more electrical signals of a power conversion assembly of the electrical power system. The method also includes estimating an impedance path of common mode current from a terminal to ground using the operating parameter(s) of the power conversion assembly. Further, the method includes determining a one or more magnitudes and/or a one or more phase angles of the impedance path at different frequencies, such a switching frequency and/or harmonics. Moreover, the method includes determining whether the impedance path is indicative of degradation in at least one of bearing insulation or a ground brush of the generator based on a change in the one or more magnitudes and/or the one or more phase angles. In addition, the method includes implementing a control action when the impedance path is indicative of degradation in the bearing insulation and/or the ground brush of the generator.Type: ApplicationFiled: April 5, 2021Publication date: October 6, 2022Inventors: Rupam Mukherjee, Kapil Jha, Arvind Kumar Tiwari, Kum Kang Huh, Robert Gregory Wagoner
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Publication number: 20220258867Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.Type: ApplicationFiled: May 6, 2022Publication date: August 18, 2022Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
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Patent number: 11404203Abstract: A magnetic unit is presented. The magnetic unit includes a magnetic core. The magnetic core includes a first limb and a second limb disposed proximate to the first limb, where a gap is formed between the first limb and the second limb. The magnetic unit further includes a first winding wound on the first limb. Moreover, the magnetic unit includes a conductive element disposed facing an outer periphery of the first winding, where the conductive element is configured to control a fringing flux generated at the gap. Further, the magnetic unit includes a heat sink operatively coupled to the conductive element, where the conductive element is further configured to transfer heat from at least one of the conductive element and the first winding to the heat sink. Moreover, a high frequency power conversion system and a method of operation of the magnetic unit is also presented.Type: GrantFiled: June 13, 2018Date of Patent: August 2, 2022Assignee: General Electric CompanyInventors: Cong Li, Anoop Jassal, Naveenan Thiagarajan, Satish Prabhakaran, Kum-Kang Huh, Jiangbiao He, Xiaosong Kang, Ruxi Wang
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Patent number: 11381236Abstract: Aspects of the present disclosure are directed toward designs and methods of improving driving of switching devices. One proposed solution to improving driving of switching devices is an auxiliary control circuit that selectively guides the switching device through at least one switching region, permitting an improved operation of the switching device.Type: GrantFiled: January 13, 2021Date of Patent: July 5, 2022Assignee: GENERAL ELECTRIC COMPANYInventors: Ramanujam Ramabhadran, Krishna Mainali, Kum-Kang Huh, Maja Harfman-Todorovic, Robert James Thomas, Cong Li
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Patent number: 11359470Abstract: A system including a control system is provided. The control system includes a main drive that receives power from a power source and outputs a variable frequency and a variable amplitude AC voltage. The control system also includes a controller to interface with the main drive and an electric machine. The controller receives one or more electrical signals associated with an operating condition of the electric machine from one or more sensors disposed between the electric machine and the main drive. The controller determines correction information based on the received electrical signals and based on a desired operating condition of the electric machine. The controller transmits the correction information to the main drive. The correction information corresponds to a rotor position of the electric machine or operating commands configured to implement the desired operating condition of the electric machine.Type: GrantFiled: September 30, 2016Date of Patent: June 14, 2022Assignee: Baker Hughes Oilfield Operations, LLCInventors: Tomas Sadilek, Nathaniel Benedict Hawes, David Allan Torrey, Di Pan, Kum Kang Huh
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Patent number: 11342876Abstract: A system and method for operating a drive system coupleable to one or more DC and AC electrical ports is disclosed. The drive system includes a DC link, at least one DC-DC converter, at least one DC-AC converter, a DC link capacitor, and a control system configured to control operation of one or more of the at least one DC-DC converter and the at least one DC-AC converter relative to one another based on operational parameters thereof. In controlling operation of one or more of the at least one DC-DC converter and the at least one DC-AC converter, the control system controls at least one of a switching frequency of the at least one DC-DC converter, a switching frequency of the at least one DC-AC converter, a DC-DC converter carrier signal phase, a DC-AC converter carrier signal phase, and a duty cycle of the at least one DC-DC converter.Type: GrantFiled: August 9, 2019Date of Patent: May 24, 2022Assignee: GENERAL ELECTRIC COMPANYInventors: Nidhishri Tapadia, Kum-Kang Huh
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Patent number: 11325714Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.Type: GrantFiled: July 9, 2020Date of Patent: May 10, 2022Assignee: General Electric CompanyInventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
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Publication number: 20220009643Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.Type: ApplicationFiled: July 9, 2020Publication date: January 13, 2022Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
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Patent number: 11177759Abstract: A drive system for driving an AC electric machine includes an electric machine power converter that provides a primary current excitation vector having a magnitude and angle to drive the AC electric machine. A control system separate from or incorporated into the power converter causes the power converter to inject a carrier signal to the AC electric machine that is superimposed onto the current vector and that generates a carrier response signal that has sensitivity to magnetic alignment information of the AC electric machine at its operating point, the carrier response signal providing a measurable magnetic alignment signature of the AC electric machine. The control system causes the power converter to inject the carrier signal at an injection angle between a constant flux injection angle and a constant torque injection angle, to reduce noise and/or vibration of the AC electric machine caused by the injected carrier signal.Type: GrantFiled: November 27, 2019Date of Patent: November 16, 2021Assignee: General Electric CompanyInventors: Kum-Kang Huh, Yukai Wang, Nidhishri Tapadia, Di Pan
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Publication number: 20210135667Abstract: Aspects of the present disclosure are directed toward designs and methods of improving driving of switching devices. One proposed solution to improving driving of switching devices is an auxiliary control circuit that selectively guides the switching device through at least one switching region, permitting an improved operation of the switching device.Type: ApplicationFiled: January 13, 2021Publication date: May 6, 2021Inventors: Ramanujam Ramabhadran, Krishna Mainali, Kum-Kang Huh, Maja Harfman-Todorovic, Robert James Thomas, Cong Li
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Patent number: 10924106Abstract: Aspects of the present disclosure are directed toward designs and methods of improving driving of switching devices. One proposed solution to improving driving of switching devices is an auxiliary control circuit that selectively guides the switching device through at least one switching region, permitting an improved operation of the switching device.Type: GrantFiled: January 2, 2019Date of Patent: February 16, 2021Assignee: GENERAL ELECTRIC COMPANYInventors: Ramanujam Ramabhadran, Krishna Mainali, Kum-Kang Huh, Maja Harfman-Todorovic, Robert James Thomas, Cong Li
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Patent number: 10770382Abstract: A modular electronics package is disclosed that includes a first and second electronics packages, with each of the first and second electronics packages including a metallized insulating substrate and a solid-state switching device positioned on the metallized insulating substrate, the solid-state switching device comprising a plurality of contact pads electrically coupled to the first conductor layer of the metallized insulating substrate. A conductive joining material is positioned between the first electronics package and the second electronics package to electrically connect them together. The first electronics package and the second electronics package are stacked with one another to form a half-bridge unit cell, with the half-bridge unit cell having a current path through the solid-state switching device in the first electronics package and a close coupled return current path through the solid-state switching device in the second electronics package in opposite flow directions.Type: GrantFiled: November 29, 2018Date of Patent: September 8, 2020Assignee: General Electric CompanyInventors: Christopher James Kapusta, Ramanujam Ramabhadran, Kum-Kang Huh, Brian Lynn Rowden, Glenn Scott Claydon, Ahmed Elasser
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Publication number: 20200212909Abstract: Aspects of the present disclosure are directed toward designs and methods of improving driving of switching devices. One proposed solution to improving driving of switching devices is an auxiliary control circuit that selectively guides the switching device through at least one switching region, permitting an improved operation of the switching device.Type: ApplicationFiled: January 2, 2019Publication date: July 2, 2020Inventors: Ramanujam Ramabhadran, Krishna Mainali, Kum-Kang Huh, Maja Harfman-Todorovic, Robert James Thomas, Cong Li
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Publication number: 20200176360Abstract: A modular electronics package is disclosed that includes a first and second electronics packages, with each of the first and second electronics packages including a metallized insulating substrate and a solid-state switching device positioned on the metallized insulating substrate, the solid-state switching device comprising a plurality of contact pads electrically coupled to the first conductor layer of the metallized insulating substrate. A conductive joining material is positioned between the first electronics package and the second electronics package to electrically connect them together. The first electronics package and the second electronics package are stacked with one another to form a half-bridge unit cell, with the half-bridge unit cell having a current path through the solid-state switching device in the first electronics package and a close coupled return current path through the solid-state switching device in the second electronics package in opposite flow directions.Type: ApplicationFiled: November 29, 2018Publication date: June 4, 2020Inventors: Christopher James Kapusta, Ramanujam Ramabhadran, Kum-Kang Huh, Brian Lynn Rowden, Glenn Scott Claydon, Ahmed Elasser
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Publication number: 20200169212Abstract: A drive system for driving an AC electric machine includes an electric machine power converter that provides a primary current excitation vector having a magnitude and angle to drive the AC electric machine. A control system separate from or incorporated into the power converter causes the power converter to inject a carrier signal to the AC electric machine that is superimposed onto the current vector and that generates a carrier response signal that has sensitivity to magnetic alignment information of the AC electric machine at its operating point, the carrier response signal providing a measurable magnetic alignment signature of the AC electric machine. The control system causes the power converter to inject the carrier signal at an injection angle between a constant flux injection angle and a constant torque injection angle, to reduce noise and/or vibration of the AC electric machine caused by the injected carrier signal.Type: ApplicationFiled: November 27, 2019Publication date: May 28, 2020Inventors: Kum-Kang Huh, Yukai Wang, Nidhishri Tapadia, Di Pan
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Publication number: 20200070643Abstract: According to some embodiments, a traction system is disclosed. The traction system includes a DC bus, an energy storage device coupled to the DC bus, and a voltage converter assembly coupled to the energy storage device. The voltage converter assembly includes a plurality of phase legs. The traction system further includes an electromechanical device including a plurality of windings coupled to the voltage converter assembly. The traction system also includes a switch coupled to the DC bus between the voltage converter assembly and the energy storage device. The traction system includes a controller configured to control the switch and the voltage converter assembly such that a phase leg and a winding of the electromechanical device form a DC/DC converter.Type: ApplicationFiled: November 6, 2019Publication date: March 5, 2020Applicant: General Electric CompanyInventors: Kum Kang Huh, Di Pan
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Patent number: 10574144Abstract: According to various embodiments, a DC/DC conversion system is disclosed. The DC/DC conversion system includes a boost converter coupled to a plurality of parallel buck converters. The boost converter and plurality of buck converters each include an inductor, where the inductors are magnetically coupled to each other. The DC/DC conversion system further includes a control system configured to control the boost converter and plurality of buck converters such that combined duty cycles of the plurality of buck converters are about equal to a duty cycle of the boost converter and the duty cycles of the plurality of buck converters are modulated out of phase.Type: GrantFiled: September 28, 2018Date of Patent: February 25, 2020Assignee: GENERAL ELECTRIC COMPANYInventors: Ramanujam Ramabhadran, Kum-Kang Huh, Mohammed Agamy, Ahmed Elasser
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Patent number: 10550816Abstract: According to some embodiments, a start-stop system for a vehicle is disclosed. The start-stop system includes a first energy storage device coupled to a starter motor. The start-stop system also includes a first DC-to-AC inverter coupled to the first energy storage device, a starter/alternator coupled to the first DC-to-AC inverter, and a second DC-to-AC inverter coupled to the starter/alternator. The start-stop system further includes a second energy storage device coupled to the second DC-to-AC inverter. The start-stop system finally includes a controller configured to control the two DC-to-AC inverters such that either the starter motor or starter/alternator starts the vehicle based on the state of charge of the second energy storage device.Type: GrantFiled: February 17, 2016Date of Patent: February 4, 2020Assignee: GENERAL ELECTRIC COMPANYInventors: Kum Kang Huh, Di Pan
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Publication number: 20190385785Abstract: A magnetic unit is presented. The magnetic unit includes a magnetic core. The magnetic core includes a first limb and a second limb disposed proximate to the first limb, where a gap is formed between the first limb and the second limb. The magnetic unit further includes a first winding wound on the first limb. Moreover, the magnetic unit includes a conductive element disposed facing an outer periphery of the first winding, where the conductive element is configured to control a fringing flux generated at the gap. Further, the magnetic unit includes a heat sink operatively coupled to the conductive element, where the conductive element is further configured to transfer heat from at least one of the conductive element and the first winding to the heat sink. Moreover, a high frequency power conversion system and a method of operation of the magnetic unit is also presented.Type: ApplicationFiled: June 13, 2018Publication date: December 19, 2019Inventors: Cong Li, Anoop Jassal, Naveenan Thiagarajan, Satish Prabhakaran, Kum-Kang Huh, Jiangbiao He, Xiaosong Kang, Ruxi Wang
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Patent number: 10507716Abstract: According to some embodiments, a traction system is disclosed. The traction system includes a DC bus, an energy storage device coupled to the DC bus, and a voltage converter assembly coupled to the energy storage device. The voltage converter assembly includes a plurality of phase legs. The traction system further includes an electromechanical device including a plurality of windings coupled to the voltage converter assembly. The traction system also includes a switch coupled to the DC bus between the voltage converter assembly and the energy storage device. The traction system includes a controller configured to control the switch and the voltage converter assembly such that a phase leg and a winding of the electromechanical device form a DC/DC converter.Type: GrantFiled: April 25, 2016Date of Patent: December 17, 2019Assignee: GENERAL ELECTRIC COMPANYInventors: Kum Kang Huh, Di Pan