Patents by Inventor Stephen B. Kuznetsov
Stephen B. Kuznetsov 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: 11929619Abstract: A stored energy power source uses a wound-rotor induction machine (WRIM) to receive energy from a prime mover via a rotating shaft, provide magnetization reactive energy from a self-excited AC capacitor bank, store the energy in N energy storage elements (ESEs) via tertiary windings, and discharge the ESEs to deliver energy via a secondary winding to a load producing output. Each discharging ESE contributes to a total flux at the secondary winding to sum the individual ESEs voltages. These voltages can be stepped up or down by a transformation ratio between the secondary winding and each of the tertiary windings. A flywheel may be coupled to the shaft to store and delivery kinetic energy. Load factor power control can be used to stabilize the output voltage. The source may be configured to allow for the bi-directional flow of energy between the ESEs, the flywheel and the load. The WRIM provides a safe, reliable and efficient system to provide high-level AC and DC output voltages.Type: GrantFiled: January 3, 2022Date of Patent: March 12, 2024Assignee: Raytheon CompanyInventor: Stephen B. Kuznetsov
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Publication number: 20240057304Abstract: A two-phased liquid-cooled electrical power apparatus includes a plurality of cooling circuits that recirculate and transition respective engineered fluids between liquid and vapor states around closed-loop fluid paths to cool a plurality of devices. A portion of each fluid path is either integrated with or in thermal contact with its device. The engineered fluids are evaporated within the respective portions of the fluid paths to hold the operating temperatures at or near the respective and different phase transition temperatures. The cooling circuits may be used to maintain different operating temperatures of hollow primary and secondary winding coils in a power transformer, of parallel connect hollow winding excitation coils and a common magnetic core in an electrical reactor, of power semiconductor devices mounted on heat sink(s) in which the fluid paths are embedded or power semiconductor devices in which the respective fluid paths pass through the devices.Type: ApplicationFiled: August 10, 2022Publication date: February 15, 2024Inventor: Stephen B. Kuznetsov
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Patent number: 11742661Abstract: A system includes a power distribution bus configured to distribute power from an electrical power source. The system also includes a plurality of electrical loads configured to receive portions of the power from the electrical power source. The system further includes a doubly-fed induction machine (DFIM) configured to reduce transmission impedance on the power distribution bus in response to a change in real or reactive power at one or more of the electrical loads, and reduce low frequency power oscillations at the source.Type: GrantFiled: October 16, 2020Date of Patent: August 29, 2023Assignee: Raytheon CompanyInventor: Stephen B. Kuznetsov
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Publication number: 20230216302Abstract: A stored energy power source uses a wound-rotor induction machine (WRIM) to receive energy from a prime mover via a rotating shaft, provide magnetization reactive energy from a self-excited AC capacitor bank, store the energy in N energy storage elements (ESEs) via tertiary windings, and discharge the ESEs to deliver energy via a secondary winding to a load producing output. Each discharging ESE contributes to a total flux at the secondary winding to sum the individual ESEs voltages. These voltages can be stepped up or down by a transformation ratio between the secondary winding and each of the tertiary windings. A flywheel may be coupled to the shaft to store and delivery kinetic energy. Load factor power control can be used to stabilize the output voltage. The source may be configured to allow for the bi-directional flow of energy between the ESEs, the flywheel and the load. The WRIM provides a safe, reliable and efficient system to provide high-level AC and DC output voltages.Type: ApplicationFiled: January 3, 2022Publication date: July 6, 2023Inventor: Stephen B. Kuznetsov
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Publication number: 20230198283Abstract: A stored energy power source uses a wound-rotor induction machine (WRIM) to receive energy from an external source, store the energy in N energy storage elements (ESEs) via tertiary windings, and discharge the ESEs to deliver energy via a secondary winding to a load producing output. Each discharging ESE contributes to a total flux at the secondary winding to sum the individual ESEs voltages. These voltages can be stepped up or down by a transformation ratio between the secondary winding and each of the tertiary windings. A flywheel may be coupled to the secondary to store and delivery energy. Load factor power control can be used to stabilize the output voltage. The source may be configured to allow for the bi-directional flow of energy between an external power source, the ESEs, the flywheel and the load. The WRIM provides a safe, reliable and efficient system to provide high-level AC and DC output voltages.Type: ApplicationFiled: December 21, 2021Publication date: June 22, 2023Inventor: Stephen B. Kuznetsov
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Patent number: 11632021Abstract: An example system includes a dynamo-electric machine. The dynamo-electric machine includes a rotor that is cylindrical and that is configured for rotation and a stator that is arranged relative to the rotor. The stator has a stepped configuration that defines a first diameter for the stator and a second diameter for the stator. The first diameter is greater than the second diameter. Zones of the stator at the first diameter hold direct-axis (D-axis) windings and zones of the stator at the second diameter hold quadrature axis (Q-axis) windings. An airgap between the rotor and the Q-axis windings is greater than an airgap between the rotor and the D-axis windings.Type: GrantFiled: April 5, 2021Date of Patent: April 18, 2023Assignee: RAYTHEON COMPANYInventor: Stephen B. Kuznetsov
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Publication number: 20220320935Abstract: An example system includes a dynamo-electric machine. The dynamo-electric machine includes a rotor that is cylindrical and that is configured for rotation and a stator that is arranged relative to the rotor. The stator has a stepped configuration that defines a first diameter for the stator and a second diameter for the stator. The first diameter is greater than the second diameter. Zones of the stator at the first diameter hold direct-axis (D-axis) windings and zones of the stator at the second diameter hold quadrature axis (Q-axis) windings. An airgap between the rotor and the Q-axis windings is greater than an airgap between the rotor and the D-axis windings.Type: ApplicationFiled: April 5, 2021Publication date: October 6, 2022Applicant: Raytheon CompanyInventor: Stephen B. Kuznetsov
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Patent number: 11444609Abstract: A system includes a prime mover configured to rotate a shaft. The system also includes a wound rotor induction generator (WRIG). The WRIG includes a rotor coupled to the shaft of the prime mover and configured to rotate when the shaft rotates, where the rotor includes a rotor winding. The WRIG also includes a stator winding electrically connected to a utility source and a load. When the stator winding receives first power from the utility source, the WRIG is configured to transform at least one of a voltage and a frequency of the first power before outputting at least a portion of the first power to the load. When the stator winding does not receive the first power from the utility source, the WRIG is configured to generate second power due to kinetic energy of the rotor and output at least a portion of the second power to the load.Type: GrantFiled: May 4, 2020Date of Patent: September 13, 2022Assignee: Raytheon CompanyInventors: Stephen B. Kuznetsov, Eric J. Stich
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Patent number: 11418031Abstract: A transformer includes a magnetic core having multiple limbs. The transformer also includes a direct current (DC) bias winding wound around a specified one of the limbs. The transformer further includes a DC amplifier electrically connected to the DC bias winding. The DC amplifier is configured to receive a first signal associated with a load output current or voltage. The DC amplifier is also configured to determine an amount of a current for the DC bias winding based on the first signal. The DC amplifier is further configured to send the determined amount of current through the DC bias winding.Type: GrantFiled: May 8, 2020Date of Patent: August 16, 2022Assignee: Raytheon CompanyInventor: Stephen B. Kuznetsov
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Publication number: 20220123555Abstract: A system includes a power distribution bus configured to distribute power from an electrical power source. The system also includes a plurality of electrical loads configured to receive portions of the power from the electrical power source. The system further includes a doubly-fed induction machine (DFIM) configured to reduce transmission impedance on the power distribution bus in response to a change in real or reactive power at one or more of the electrical loads, and reduce low frequency power oscillations at the source.Type: ApplicationFiled: October 16, 2020Publication date: April 21, 2022Inventor: Stephen B. Kuznetsov
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Publication number: 20210351588Abstract: A transformer includes a magnetic core having multiple limbs. The transformer also includes a direct current (DC) bias winding wound around a specified one of the limbs. The transformer further includes a DC amplifier electrically connected to the DC bias winding. The DC amplifier is configured to receive a first signal associated with a load output current or voltage. The DC amplifier is also configured to determine an amount of a current for the DC bias winding based on the first signal. The DC amplifier is further configured to send the determined amount of current through the DC bias winding.Type: ApplicationFiled: May 8, 2020Publication date: November 11, 2021Inventor: Stephen B. Kuznetsov
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Publication number: 20210344331Abstract: A system includes a prime mover configured to rotate a shaft. The system also includes a wound rotor induction generator (WRIG). The WRIG includes a rotor coupled to the shaft of the prime mover and configured to rotate when the shaft rotates, where the rotor includes a rotor winding. The WRIG also includes a stator winding electrically connected to a utility source and a load. When the stator winding receives first power from the utility source, the WRIG is configured to transform at least one of a voltage and a frequency of the first power before outputting at least a portion of the first power to the load. When the stator winding does not receive the first power from the utility source, the WRIG is configured to generate second power due to kinetic energy of the rotor and output at least a portion of the second power to the load.Type: ApplicationFiled: May 4, 2020Publication date: November 4, 2021Inventors: Stephen B. Kuznetsov, Eric J. Stich
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Patent number: 10491074Abstract: An electro-mechanical kinetic energy storage device includes an input port, an output port, and a tertiary port separate from and magnetically coupled to the input port and the output port. The input port is configured to receive a first input electrical energy from a first electrical source for inducing mechanical energy into the electro-mechanical kinetic energy storage device. The output port is configured output a first converted electrical energy to a first load in which the outputted electrical energy is generated from the induced mechanical energy. The tertiary port is configured to receive a second input electrical energy from a second electrical source for inducing the mechanical energy, and output a second converted electrical energy to a second load, the second converted electrical energy generated from the induced mechanical energy.Type: GrantFiled: November 15, 2016Date of Patent: November 26, 2019Assignee: Raytheon CompanyInventor: Stephen B. Kuznetsov
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Patent number: 9911532Abstract: A high density capacitor comprises a housing having a cavity, and a plurality of capacitors forming at least one capacitor bank disposed in the housing cavity. A native cooling fluid is disposed in the cavity, and a heat exchanger is coupled to the housing. A pump is configured to circulate the native cooling fluid from the cavity, through the heat exchanger, through the spacings along an outer surface of each of the capacitors to cool the capacitors using forced convection. The heat exchanger is configured to communicate a secondary fluid through the heat exchanger and draw heat from the native cooling fluid flowing through the heat exchanger. The heat exchanger may have a plenum having a plurality of openings configured to dispense the native cooling fluid from the heat exchanger proximate the at least one capacitor bank.Type: GrantFiled: August 25, 2014Date of Patent: March 6, 2018Assignee: Raytheon CompanyInventors: Anurag Gupta, Robert R. Lopez, Stephen B. Kuznetsov
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Patent number: 9705314Abstract: An electromagnetic direct current (DC) pulse power system includes a plurality of pulse forming networks (PFN) module, and an energy storage capacitor and circuit interruption apparatus. Each PFN module includes a PFN circuit configured to generate a pulsed DC output power. The PFN circuit includes an energy storage inductor with a primary winding having a primary inductance that controls a primary impedance of the PFN circuit. The electromagnetic direct current (DC) pulse power system further includes an auto-transformer having a multi-stage fault-limiting system configured to reduce fault current.Type: GrantFiled: February 26, 2016Date of Patent: July 11, 2017Assignee: RAYTHEON COMPANYInventor: Stephen B. Kuznetsov
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Patent number: 9667232Abstract: A hybrid energy storage system is configured to control pulsed power. A first dynamo-electric machine is coupled to an inertial energy storage device and has multiple input stator windings configured to accept input power from a source. A polyphase output stator winding is configured to deliver electric power having a first response time to a DC bus. A secondary energy storage system is coupled to the DC bus and is configured to convert its stored energy to electric power in a bidirectional manner. A second dynamo-electric machine has an input stator winding and at least one polyphase output stator winding coupled to a converter, the converter coupled to a DC output. A polyphase boost exciter is configured to derive energy from the DC bus and excite the second machine tertiary stator winding, wherein the second machine is configured to be excited at a faster rate than the first response time of the first machine.Type: GrantFiled: May 13, 2015Date of Patent: May 30, 2017Assignee: Raytheon CompanyInventor: Stephen B. Kuznetsov
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Publication number: 20170063192Abstract: An electro-mechanical kinetic energy storage device includes an input port, an output port, and a tertiary port separate from and magnetically coupled to the input port and the output port. The input port is configured to receive a first input electrical energy from a first electrical source for inducing mechanical energy into the electro-mechanical kinetic energy storage device. The output port is configured output a first converted electrical energy to a first load in which the outputted electrical energy is generated from the induced mechanical energy. The tertiary port is configured to receive a second input electrical energy from a second electrical source for inducing the mechanical energy, and output a second converted electrical energy to a second load, the second converted electrical energy generated from the induced mechanical energy.Type: ApplicationFiled: November 15, 2016Publication date: March 2, 2017Inventor: Stephen B. Kuznetsov
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Patent number: 9531289Abstract: An electro-mechanical kinetic energy storage device includes an input port, an output port, and a tertiary port separate from and magnetically coupled to the input port and the output port. The input port is configured to receive a first input electrical energy from a first electrical source for inducing mechanical energy into the electro-mechanical kinetic energy storage device. The output port is configured output a first converted electrical energy to a first load in which the outputted electrical energy is generated from the induced mechanical energy. The tertiary port is configured to receive a second input electrical energy from a second electrical source for inducing the mechanical energy, and output a second converted electrical energy to a second load, the second converted electrical energy generated from the induced mechanical energy.Type: GrantFiled: April 27, 2012Date of Patent: December 27, 2016Assignee: RAYTHEON COMPANYInventor: Stephen B. Kuznetsov
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Publication number: 20160336928Abstract: A hybrid energy storage system is configured to control pulsed power. A first dynamo-electric machine is coupled to an inertial energy storage device and has multiple input stator windings configured to accept input power from a source. A polyphase output stator winding is configured to deliver electric power having a first response time to a DC bus. A secondary energy storage system is coupled to the DC bus and is configured to convert its stored energy to electric power in a bidirectional manner. A second dynamo-electric machine has an input stator winding and at least one polyphase output stator winding coupled to a converter, the converter coupled to a DC output. A polyphase boost exciter is configured to derive energy from the DC bus and excite the second machine tertiary stator winding, wherein the second machine is configured to be excited at a faster rate than the first response time of the first machine.Type: ApplicationFiled: May 13, 2015Publication date: November 17, 2016Inventor: Stephen B. Kuznetsov
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Publication number: 20160181793Abstract: An electromagnetic direct current (DC) pulse power system includes a plurality of pulse forming networks (PFN) module, and an energy storage capacitor and circuit interruption apparatus. Each PFN module includes a PFN circuit configured to generate a pulsed DC output power. The PFN circuit includes an energy storage inductor with a primary winding having a primary inductance that controls a primary impedance of the PFN circuit. The electromagnetic direct current (DC) pulse power system further includes an auto-transformer having a multi-stage fault-limiting system configured to reduce fault current.Type: ApplicationFiled: February 26, 2016Publication date: June 23, 2016Inventor: Stephen B. Kuznetsov