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| Invention Ref | App Title | Patent No. | Inventor(s) | Invention Abstract | Application Number | Commercialization Manager |
|---|---|---|---|---|---|---|
| 201102576 | SYSTEM AND METHOD FOR KEY GENERATION IN SECURITY TOKENS | 9,172,698 | Nathanael R Paul, Stacy J Prowell, Raphael C Pooser, Philip G Evans, Travis S Humble | Functional randomness in security tokens (FRIST) may achieve improved security in two-factor authentication hardware tokens by improving on the algorithms used to securely generate random data. A system and method in one embodiment according to the present invention may allow for security of a token based on storage cost and computational security. This approach may enable communication where security is no longer based solely on onetime pads (OTPs) generated from a single cryptographic function (e.g., SHA-256). | 14/052,065 | DAVID L. SIMS |
| 201303218 | Pilot-Aided Feedforward Data Recovery in Optical Coherent Communications | 9,768,885 | Bing Qi | A method and a system for pilot-aided feedforward data recovery are provided. The method and system include a receiver including a strong local oscillator operating in a free running mode independent of a signal light source. The phase relation between the signal light source and the local oscillator source is determined based on quadrature measurements on pilot pulses from the signal light source. Using the above phase relation, information encoded in an incoming signal can be recovered, optionally for use in communication with classical coherent communication protocols and quantum communication protocols. | 14/849,675 | EUGENE R. COCHRAN |
| 201603623 | Nonlinear Interferometer System and Methods | Nicholas A Peters, Joseph M Lukens, Raphael C Pooser | Nonlinear interferometers include a nonlinear optical medium that is situated to produce a conjugate optical beam in response to a pump beam and a probe beam. The pump, probe, and conjugate beams propagate displaced from each other along a common optical path. One of the beams is selectively phase shifted, and the beams are then returned to the nonlinear medium, with the selectively phase shift beam phase shifted again. The nonlinear medium provides phase sensitive gain to at least one of the probe or conjugate beams, and the amplified beam is detected to provide an estimate of the phase shift. | 15/582,178 | EUGENE R. COCHRAN | |
| 201603806 | Genuine Randomness from an Incoherent Source | Bing Qi | The invention relates to random number generators and more specifically to a random number generation scheme based on measuring the quadrature fluctuations of a single mode thermal state with an optical homodyne detector. This scheme can be implemented with low-cost, off-the-shelf components, and can generate true randomness at a very high speed. The simple and robust design shows its potential for chip-size integration. We expect this technology will have widely applications, such as in cryptography. | 62/544,325 | EUGENE R. COCHRAN | |
| 201603700 | Deterministic Single-Photon Source based on Spectral Shift of a Heralded Photon | Warren P Grice, Joseph M Lukens, Nicholas A Peters | An apparatus for producing a single photon can comprise a modulator that modulates the wavelength of a pump beam based on wavelength of an idler photon of a signal/idler photon pair. A wavelength division multiplexer combines the modulated pump beam and the signal photon in a non-linear element to produce an output photon having a preselected wavelength based on signal photon wavelength and a wavelength of the modulated pump beam. | PCT/US17/064142 | EUGENE R. COCHRAN | |
| 201804071 | Quantum Key Distribution Using a Thermal Source | Bing Qi, Philip G Evans, Warren P Grice | We propose a novel CV QKD scheme using a broadband thermal source.This scheme gets rid of both the random number generator and optical modulator, thus greatly simplifies the implementation of CV QKD and makes it more practical. | 16/197,457 | EUGENE R. COCHRAN | |
| 200701995 | Tampering Detection System Using Quantum-Mechanical Systems | 8,077,047 | Warren P Grice, Ryan S Bennink, Travis S Humble | The use of quantum-mechanically entangled photons for monitoring the integrity of a physical border or a communication link is described. The no-cloning principle of quantum information science is used as protection against an intruder's ability to spoof a sensor receiver using a ‘classical’ intercept-resend attack. Correlated measurement outcomes from polarization-entangled photons are used to protect against quantum intercept-resend attacks, i.e., attacks using quantum teleportation. | 12/424,957 | DAVID L. SIMS |
| 201102727 | Quantum Random Number Generator | 9,335,973 | Raphael C Pooser | A quantum random number generator (QRNG) and a photon generator for a QRNG are provided. The photon generator may be operated in a spontaneous mode below a lasing threshold to emit photons. Photons emitted from the photon generator may have at least one random characteristic, which may be monitored by the QRNG to generate a random number. In one embodiment, the photon generator may include a photon emitter and an amplifier coupled to the photon emitter. The amplifier may enable the photon generator to be used in the QRNG without introducing significant bias in the random number and may enable multiplexing of multiple random numbers. The amplifier may also desensitize the photon generator to fluctuations in power supplied thereto while operating in the spontaneous mode. In one embodiment, the photon emitter and amplifier may be a tapered diode amplifier. | 14/147,131 | EUGENE R. COCHRAN |
| 201202833 | Self-Correcting Random Number Generator | 9,436,436 | Travis S Humble, Raphael C Pooser | A system and method for generating random numbers. The system may include a random number generator (RNG), such as a quantum random number generator (QRNG) configured to self-correct or adapt in order to substantially achieve randomness from the output of the RNG. By adapting, the RNG may generate a random number that may be considered random regardless of whether the random number itself is tested as such. As an example, the RNG may include components to monitor one or more characteristics of the RNG during operation, and may use the monitored characteristics as a basis for adapting, or self-correcting, to provide a random number according to one or more performance criteria. | 14/178,863 | DAVID L. SIMS |
| 201603700 | Deterministic Single-Photon Source based on Spectral Shift of a Heralded Photon | Warren P Grice, Joseph M Lukens, Nicholas A Peters | An apparatus for producing a single photon can comprise a modulator that modulates the wavelength of a pump beam based on wavelength of an idler photon of a signal/idler photon pair. A wavelength division multiplexer combines the modulated pump beam and the signal photon in a non-linear element to produce an output photon having a preselected wavelength based on signal photon wavelength and a wavelength of the modulated pump beam. | 15/829,349 | EUGENE R. COCHRAN | |
| 201303150 | Quantum-Authenticated Clock Signal | 10,110,369 | Warren P Grice, Raphael C Pooser, Phani Teja V Kuruganti, Philip G Evans, Miljko Bobrek | The present disclosure is directed to a system and method of distributing time information to enable synchronization in an authenticated manner via a quantum channel. A source device may transmit a timing signal, T on a communication channel from the source device to a receiver device. The timing signal T may be include a time or times stored in memory or calculated using a previously agreed upon formula. The method may include transmitting a quantum system Q from the source device to the receiver device. The quantum system may be prepared in a randomly chosen state and may be measured by the receiver device in a randomly chosen measurement basis. | 15/583,502 | EUGENE R. COCHRAN |
| 201603699 | Simultaneous Classical and Quantum Communication Scheme Based on Coherent Detection | Bing Qi | An improved coherent communication scheme is provided. The coherent communication scheme encodes both classical and quantum information simultaneously using isolated groups of states: classical information is represented by different groups and can be decoded deterministically; and quantum information is represented by highly overlapped states within the same group, thus guaranteeing security. Decoding includes projecting the detection results at the receiver to one of the distinguishable encoding groups first, which allows the classical information to be read out, and then generating a quantum key from the residual randomness. This communications scheme enables simultaneous classical communication and QKD over the same communication channel using the same transmitter and receiver, opening the door to operate QKD in the background of classical communication and at negligible costs. | 15/952,873 | EUGENE R. COCHRAN | |
| 201704004 | Photonically Assisted Generation of Microwave Signals for Spin Qubit Control in Silicon | Pavel Lougovski, Joseph M Lukens, Fahd A Mohiyaddin | Here we propose a revolutionary technological advance enabling scalable high temperature silicon quantum computing through photonically assisted generation of microwave qubit control signals beyond 100 GHz. B | 62/656,613 | EUGENE R. COCHRAN | |
| 201804067 | Three-Party Quantum Secret Sharing with Entangled Photon Pairs | Warren P Grice, Joseph M Lukens, Nicholas A Peters, Brian P Williams | The invention is a multi-party quantum secret sharing protocol utilizing two-photon entangled states in which the source is one of the secret sharing participants. The protocol is simpler to implement than multi-photon quantum secret sharing schemes, and is less vulnerable to Trojan Horse attacks than the multi-client single-photon quantum secret sharing methods. | 62/662,906 | EUGENE R. COCHRAN | |
| 201703949 | Quantum Random Number Generator | Raphael C Pooser, Bing Qi, Benjamin J Lawrie, Brian P Williams | This invention generates photon shot noise in a compact balanced photodetection scheme as part of a high bit rate continuous variable quantum random number generator. | 16/142,984 | EUGENE R. COCHRAN | |
| 201503499 | Semiconductor Composition Containing Iron, Dysprosium, and Terbium | 9,773,876 | Raphael C Pooser, Benjamin J Lawrie, Arthur P Baddorf, Abhinav Malasi, Humaira Taz, Annettee Farah, Ramki Kalyanaraman, Gerd J Duscher, Maulik Patel | An amorphous semiconductor composition includes 1 to 70 atomic percent iron, 15 to 65 atomic percent dysprosium, 15 to 35 atomic percent terbium, balance X, wherein X is at least one of an oxidizing element and a reducing element. The composition has an essentially amorphous microstructure, an optical transmittance of at least 50% in at least the visible spectrum and semiconductor electrical properties. | 15/194,715 | DAVID L. SIMS |
| 201704060 | Gain Balanced Broadband All-Fiber SU(1,1) Interferometer | Nicholas A Peters, Joseph M Lukens, Raphael C Pooser | We invented a new type of nonlinear interferometer improving upon sensitivity of conventional nonlinear interferometers with fewer components reducing the cost and complexity. This approach has better sensitivity for the same sensing power used in conventional interferometers. Our design does not require active stabilization. It has wide bandwidth operation. It is tolerant to wide temperature swings as well as high magnetic fields. This design is based on fiber optics and is suitable for distributed fiber-optic sensing systems. | 62/669,470 | EUGENE R. COCHRAN | |
| 201603806 | Quantum Random Number Generator | Bing Qi | The invention relates to random number generators and more specifically to a random number generation scheme based on measuring the quadrature fluctuations of a single mode thermal state with an optical homodyne detector. This scheme can be implemented with low-cost, off-the-shelf components, and can generate true randomness at a very high speed. The simple and robust design shows its potential for chip-size integration. We expect this technology will have widely applications, such as in cryptography. | 16/057,345 | EUGENE R. COCHRAN | |
| 201303062 | Industrial Geospatial Analysis Tool for Energy Evaluation- IGATE-E | 9,378,256 | Nasr Alkadi, Michael Starke | An industrial analytic system processes industrial data. A database engine provides access to a plurality of database management systems that serve energy consumption and product sales data. An input filter that selectively passes the filtered data streams that comprise energy sales data, location data, and a business classification code data in datasets by removing selected datasets that do not include energy information. A standard deviation filter removes datasets from the filtered data streams that fall outside of a predetermined variation from an average value. A computation module analyzes the correlation between electrical energy consumption within a standard industrial classification code represented in the datasets and a programmable criterion. | 14/081,802 | DAVID L. SIMS |
| 200301356 | Space Charge Dosimeters for Extremely Low Power Measurements of Radiation in Shipping Containers | 7,936,270 | Charles L Britton Jr, Mark A Buckner, Gregory R Hanson, William L Bryan | Methods and apparatus are described for space charge dosimeters for extremely low power measurements of radiation in shipping containers. A method includes insitu polling a suite of passive integrating ionizing radiation sensors including reading-out dosimetric data from a first passive integrating ionizing radiation sensor and a second passive integrating ionizing radiation sensor, where the first passive integrating ionizing radiation sensor and the second passive integrating ionizing radiation sensor remain situated where the dosimetric data was integrated while reading-out. Another method includes arranging a plurality of ionizing radiation sensors in a spatially dispersed array; determining a relative position of each of the plurality of ionizing radiation sensors to define a volume of interest; collecting ionizing radiation data from at least a subset of the plurality of ionizing radiation sensors; and triggering an alarm condition when a dose level of an ionizing radiation source is calculated to exceed a threshold. | 12/406,680 | EUGENE R. COCHRAN |
| 201603624 | Tampering Detection and Location Identification of Digital Audio Recordings | Thomas J King Jr, Jidong Chai, Yilu Liu, Wensuan Yao, Jiecheng Zhao | Systems and methods for detecting a tampering and identifying a location of a digital recording are provided. A frequency sequence and a phase angle sequence may be extracted from the digital recording. A portion of the frequency sequence may be matched to one of a plurality of reference frequency sequences, and a portion of the phase angle sequence may be matched to one of a plurality of reference phase angle sequences. Tampering of the digital recording may be detected when the frequency and phase sequences differ from the matched reference sequences. Moreover, a noise sequence may be extracted from the extracted frequency sequence. A location of the digital recording may be identified by matching the noise sequence to one of a plurality of noise sequences of the plurality of reference frequency sequences. | 14/992,974 | EUGENE R. COCHRAN | |
| 201503510 | DC Current Controller for Continuously Variable Series Reactor | Burak Ozpineci, Madhu Sudhan Chinthavali, Steven L Campbell, Omer C Onar, Larry E Seiber, Clifford P White, Aleksandar D Dimitrovski, Philip Irminger, Leon M Tolbert, Zhi Li, Fei Wang, Daniel J Costinett, Fei Yang, Jingxin Wang, Sheng Zheng | A direct current controller includes a rectifier configured to convert alternating current input into a direct current output. A converter electrically coupled to the rectifier generates a converted direct current voltage that regulates a converted direct current from the direct current output of the rectifier and synthesizes an ac component of an alternating current grid to counteract an induced back-emf. A direct current controller central controller coupled to the converter regulates the converted direct current. | 15/261,106 | EUGENE R. COCHRAN | |
| 201703959 | SYNCHROPHASOR MEASUREMENT METHOD FOR POWER SYSTEMS | Andrew N Herron Jr, Daniel J King, Lingwei Zhan, Wenxuan Yao, Jiecheng Zhao, UNKNOWN UNKNOWN, Yilu Liu | A synchrophasor measurement method for a device configured to take synchronized measurements in a power system is provided. The synchrophasor measurement method includes receiving global positioning system (GPS)-synchronized samples of a signal sensed by the device from the power system; determining a level of distortion of the signal; selecting, based on the level of distortion, a computation method, the computation method being one of an improved zero-crossing (IZC) method and an enhanced phase-lock-loop (EPLL) method; performing the selected computation method to determine at least one parameter of the signal at a reporting frequency, which is at least twice a line frequency of the power system; and outputting, at the reporting frequency, the at least one parameter to an operator of the power system to allow the operator to perform at least one of a monitoring and a controlling of at least one element of the power system. | 15/609,484 | EUGENE R. COCHRAN | |
| 200201090 | Motor Stator Using Corner Scraps for Additional Electrical Components | 6,707,222 | Donald J Adams, John S Hsu, Gui-Jia Su, M M. Nagashima, Constantin Stancu, Doulgas Scott Carlson, S M Smith | A method for making a motor and auxiliary devices with a unified stator body comprises providing a piece of material (10) having an area larger than a cross section of the stator (11), removing material from the piece of material (10) to form a pattern for a cross section of a core (11) for the stator, and removing material from the piece of material (10) outside the cross section of the core of the stator (11) to allow positioning of cores (22, 23, 24) for supporting windings (25, 26, 27) of least one additional electromagnetic device, such as a transformer (62) in a dc-to-dc converter (61, 62) that provides a low. voltage dc output. An article of manufacture made according to the invention is also disclosed and apparatus made with the method and article of manufacture are also disclosed. | 10/189,953 | DAVID L. SIMS |
| 200601802 | Auxiliary Power Generation in a Motor Transformer | 7,092,267 | Donald J Adams, John S Hsu, Gui-Jia Su, M M. Nagashima, Constantin Stancu, Doulgas Scott Carlson, S M Smith | A power supply generates alternating current and direct current from a constant-voltage source. A multi-phase pulse width modulation voltage source inverter is connected across the source to output multi-phase alternating current. At least one waveform generator is bridged in parallel with the inverter, with each waveform generator outputting zero-sequence waveform current compensated to maintain the multi-phase current within a predetermined tolerance from a desired set point. A rectifier receives the waveform current and generates direct current. | 10/664,297 | DAVID L. SIMS |
| 200401396 | System and Method for Identifying, Validating, Weighing and Characterizing Weighing and Characterizing Moving or Stationary Vehicles and Cargo | 7,305,324 | Robert K Abercrombie, Stephen Batsell, David L Beshears, Matthew Scudiere, Clifford P White | An asset identification and information infrastructure management (AI3M) device having an automated identification technology system (AIT), a Transportation Coordinators' Automated Information for Movements System II (TC-AIMS II), a weigh-in-motion system (WIM-II), and an Automated Air Load Planning system (AALPS) all in electronic communication for measuring and calculating actual asset characteristics, either statically or in-motion, and further calculating an actual load plan. | 10/998,305 | DAVID L. SIMS |
| 201002502 | Gas Cooled Traction Drive Inverter | 8,553,414 | Madhu Sudhan Chinthavali | The present invention provides a modular circuit card configuration for distributing heat among a plurality of circuit cards. Each circuit card includes a housing adapted to dissipate heat in response to gas flow over the housing. In one aspect, a gas-cooled inverter includes a plurality of inverter circuit cards, and a plurality of circuit card housings, each of which encloses one of the plurality of inverter cards. | 13/312,548 | EUGENE R. COCHRAN |
| 201704020 | Amplitude Modulation Based High Frequency Gate Driver Circuit for Active Control of Power Semiconductor Devices | Emre Gurpinar | This invention provides signal, power and gate impedance transfer in a compact and efficient way. It provides the opportunity to maximize power density of the gate driver circuits for power semiconductor devices, which becomes a bottleneck for high power density power electronic systems. | 62/657,024 | EUGENE R. COCHRAN | |
| 201703973 | Polyphase Wireless Power Transfer System Coils and Resonant Networks | Jason L Pries, Veda Prakash, Galigekere | This new technology will enable a dramatic increase in power density over existing wireless power transfer systems. The approach improves field utilization to increase power transfer without increasing the size or mass of the system, resulting in significantly smaller wireless power transfer coils and the associated system compared to previous state of the art. The resulting paradigmatic improvement over existing wireless-power transfer schemes is especially useful in high power wireless charging applications. The technology has the potential to reduce field emissions, an important consideration for safety of wireless power transfer systems. The new system architecture is expected to be a key for achieving the Department of Energy’s extreme fast charging goals for hybrid and electric vehicles. | DAVID L. SIMS | ||
| 200501646 | Triple-Voltage DC/DC Converter and Method | 7,408,794 | Gui-Jia Su | A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolation transformer; providing the gating signals to power semiconductor switches in the primary and secondary circuits to control power flow between the primary and secondary circuits and by controlling a phase shift between the primary voltage and the secondary voltage. The primary dc power circuit and the secondary dc power circuit each further comprising at least two tank capacitances arranged in series as a tank leg, at least two resonant switching devices arranged in series with each other and arranged in parallel with the tank leg, and at least one voltage source arranged in parallel with the tank leg and the resonant switching devices, said resonant switching devices including power semiconductor switches that are operated by gating signals. Additional embodiments having a center-tapped battery on the low voltage side and a plurality of modules on both the low voltage side and the high voltage side are also disclosed for the purpose of reducing ripple current and for reducing the size of the components. | 11/409,597 | EUGENE R. COCHRAN |
| 200601740 | Electric Vehicle System for Charging and Supplying Electrical Power | 7,733,039 | Gui-Jia Su | A power system that provides power between an energy storage device, an external charging-source/load, an onboard electrical power generator, and a vehicle drive shaft. The power system has at least one energy storage device electrically connected across a dc bus, at least one filter capacitor leg having at least one filter capacitor electrically connected across the dc bus, at least one power inverter/converter electrically connected across the dc bus, and at least one multiphase motor/generator having stator windings electrically connected at one end to form a neutral point and electrically connected on the other end to one of the power inverter/converters. A charging-sourcing selection socket is electrically connected to the neutral points and the external charging-source/load. At least one electronics controller is electrically connected to the charging-sourcing selection socket and at least one power inverter/converter. The switch legs in each of the inverter/converters selected by the charging-source/load socket collectively function as a single switch leg. The motor/generators function as an inductor. | 11/859,006 | EUGENE R. COCHRAN |
| 200902230 | Electrical Motor/Generator Drive Apparatus and Method | 8,373,372 | Gui-Jia Su | The present disclosure includes electrical motor/generator drive systems and methods that significantly reduce inverter direct-current (DC) bus ripple currents and thus the volume and cost of a capacitor. The drive methodology is based on a segmented drive system that does not add switches or passive components but involves reconfiguring inverter switches and motor stator winding connections in a way that allows the formation of multiple, independent drive units and the use of simple alternated switching and optimized Pulse Width Modulation (PWM) schemes to eliminate or significantly reduce the capacitor ripple current. | 12/887,110 | EUGENE R. COCHRAN |
| 201102667 | Vehicle to Wireless Power Transfer Coupling Coil Alignment Sensor | 9,260,026 | John I Miller, Clifford P White, T Jones P, Paul H Chambon | A non-contacting position sensing apparatus includes at least one vehicle-mounted receiver coil that is configured to detect a net flux null when the vehicle is optimally aligned relative to the primary coil in the charging device. Each of the at least one vehicle-mounted receiver coil includes a clockwise winding loop and a counterclockwise winding loop that are substantially symmetrically configured and serially connected to each other. When the non-contacting position sensing apparatus is located directly above the primary coil of the charging device, the electromotive forces from the clockwise winding loop and the counterclockwise region cancel out to provide a zero electromotive force, i.e., a zero voltage reading across the coil that includes the clockwise winding loop and the counterclockwise winding loop | 13/544,058 | DAVID L. SIMS |
| 201102768 | WIRELESS POWER CHARGING USING POINT OF LOAD CONTROLLED HIGH FREQUENCY POWER CONVERTERS | 9,156,364 | Steven L Campbell, John I Miller, Paul H Chambon, Larry E Seiber, Clifford P White | An apparatus for wirelessly charging a battery of an electric vehicle is provided with a point of load control. The apparatus includes a base unit for generating a direct current (DC) voltage. The base unit is regulated by a power level controller. One or more point of load converters can be connected to the base unit by a conductor, with each point of load converter comprising a control signal generator that transmits a signal to the power level controller. The output power level of the DC voltage provided by the base unit is controlled by power level controller such that the power level is sufficient to power all active load converters when commanded to do so by any of the active controllers, without generating excessive power that may be otherwise wasted. | 13/739,198 | DAVID L. SIMS |
| 201002429 | Power Module Packaging with Double Sided Planar Interconnection and Heat Exchangers | 9,041,183 | Zhenxian Liang, Laura D Marlino, Fei Wang, Puqi Ning | A double sided cooled power module package having a single phase leg topology includes two IGBT and two diode semiconductor dies. Each IGBT die is spaced apart from a diode semiconductor die, forming a switch unit. Two switch units are placed in a planar face-up and face-down configuration. A pair of DBC or other insulated metallic substrates is affixed to each side of the planar phase leg semiconductor dies to form a sandwich structure. Attachment layers are disposed on outer surfaces of the substrates and two heat exchangers are affixed to the substrates by rigid bond layers. The heat exchangers, made of copper or aluminum, have passages for carrying coolant. The power package is manufactured in a two-step assembly and heating process where direct bonds are formed for all bond layers by soldering, sintering, solid diffusion bonding or transient liquid diffusion bonding, with a specially designed jig and fixture. | 13/547,937 | EUGENE R. COCHRAN |
| 201002502 | Gas Cooled Traction Drive Inverter | 9,320,179 | Madhu Sudhan Chinthavali | The present invention provides a modular circuit card configuration for distributing heat among a plurality of circuit cards. Each circuit card includes a housing adapted to dissipate heat in response to gas flow over the housing. In one aspect, a gas-cooled inverter includes a plurality of inverter circuit cards, and a plurality of circuit card housings, each of which encloses one of the plurality of inverter cards. | 14/016,327 | EUGENE R. COCHRAN |
| 201303196 | Overvoltage Protection System for Wireless Power Transfer Systems | 9,640,976 | Clifford P White, John I Miller, Omer C Onar, Paul H Chambon, Lixin Tang, T Jones P | A wireless power transfer overvoltage protection system is provided. The system includes a resonant receiving circuit. The resonant receiving circuit includes an inductor, a resonant capacitor and a first switching device. The first switching device is connected the ends of the inductor. The first switching device has a first state in which the ends of the inductor are electrically coupled to each other through the first switching device, and a second state in which the inductor and resonant capacitor are capable of resonating. The system further includes a control module configured to control the first switching device to switching between the first state and the second state when the resonant receiving circuit is charging a load and a preset condition is satisfied and otherwise, the first switching device is maintained in the first state. | 14/631,903 | DAVID L. SIMS |
| 201303196 | Overvoltage Protection System for Wireless Power Transfer Systems | Clifford P White, John I Miller, Omer C Onar, Paul H Chambon, Lixin Tang, T Jones P | PCT/US16/019522 | DAVID L. SIMS | ||
| 200701874 | Power Conversion Apparatus and Method | 8,110,948 | Gui-Jia Su | A power conversion apparatus includes an interfacing circuit that enables a current source inverter to operate from a voltage energy storage device (voltage source), such as a battery, ultracapacitor or fuel cell. The interfacing circuit, also referred to as a voltage-to-current converter, transforms the voltage source into a current source that feeds a DC current to a current source inverter. The voltage-to-current converter also provides means for controlling and maintaining a constant DC bus current that supplies the current source inverter. The voltage-to-current converter also enables the current source inverter to charge the voltage energy storage device, such as during dynamic braking of a hybrid electric vehicle, without the need of reversing the direction of the DC bus current. | 12/399,486 | EUGENE R. COCHRAN |
| 201503510 | DC Current Controller for Continuously Variable Series Reactor | Burak Ozpineci, Madhu Sudhan Chinthavali, Steven L Campbell, Omer C Onar, Larry E Seiber, Clifford P White, Aleksandar D Dimitrovski, Philip Irminger, Leon M Tolbert, Zhi Li, Fei Wang, Daniel J Costinett, Fei Yang, Jingxin Wang, Sheng Zheng | This disclosure presents the invention of a DC current controller (DCC), specifically developed for controlling the reactance of the continuously variable series reactor (CVSR). The CVSR is a device designed to be series connected in an AC electric power line to regulate the power flow through varying the reactance. Intended for utility transmission grid applications, the CVSR will be installed outdoors in a substation. The invented DCC is suitable for outdoor environment as part of the CVSR, can tolerate different normal and abnormal AC grid conditions, and require low maintenance. | 15/261,106 | EUGENE R. COCHRAN | |
| 201703867 | Non-Intrusive Online Health Monitoring System (OHMS) for Power Electronics Converters | Zhiqiang Wang, Rong Zeng, Madhu Sudhan Chinthavali | This invention disclosure presents an universal interface monitoring power electronics converter health status using all-hardware solution, requiring only sensing information, e.g. DC voltage, line current, and temperature, available in a typical power converter. The proposed hardware-circuit based online health monitoring system (OHMS) aims at improving the overall reliability and extending the lifetime of power electronics converters in a non-intrusive style (i.e. no need to get access to power semiconductor devices and their host controllers), while not causing interference to their normal operation. The invented interface provides two aspects of power converter health monitoring: automatically decreasing switching frequency of power semiconductor devices when over-temperature protection is activated, and instantaneously maintaining DC bus voltage when over-voltage protection is activated. Decreasing the switching frequency prevents the power electronics converter from thermal damage and fatigue, while maintaining a stable DC bus voltage prevents avalanche failure of power semiconductor devices. The basic functionality and output of power electronics converter are not be affected by the invented OHMS. | 62/780,555 | EUGENE R. COCHRAN | |
| 201703868 | Method and Apparatus for Online Switching Frequency Adjustment of Power Electronics | Zhiqiang Wang, Rong Zeng, Madhu Sudhan Chinthavali | This invention disclosure focuses on a universal modular device adjusting power electronics converter switching frequency, requiring only output pulse width modulation signals from its controller. The invented device aims at adjusting the switching frequency of power electronics converter outside of its digital controllers, without causing interference to normal operation. When the device is disabled, power electronics converters operate at a fixed switching frequency determined by its controllers. When the device is enabled by designated conditions such as over-temperature fault or light-load conditions, power electronics converters operate at another switching frequency changed by the proposed device regardless of the switching frequency from the controllers. The invented device featuring modular structure and universal interface circuit is able to work with power electronics converters that have various types of controllers. | 62/780,563 | EUGENE R. COCHRAN |