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| Number | Title | Issue Date |
| 7614792 | Compliant foil fluid film radial bearing or seal A compliant foil fluid film bearing or seal apparatus includes a bushing having a plurality of peripherally separate bushing segments. The bushing has a bore defined therethrough, with a peripheral portion of the bore being defined on each bushing segment. A plurali... | 11/10/2009 |
| RE40713 | Turbogenerator/motor controller A turbogenerator/motor controller with a microprocessor based inverter having multiple modes of operation. To start the turbine, the inverter connects to and supplies fixed current, variable voltage, variable frequency, AC power to the permanent magnet turbogenerato... | 05/19/2009 |
| 7415764 | Recuperator assembly and procedures A construction of recuperator core segments is provided which insures proper assembly of the components of the recuperator core segment, and of a plurality of recuperator core segments. Each recuperator core segment must be constructed so as to prevent nesting of fi... | 08/26/2008 |
| 7147050 | Recuperator construction for a gas turbine engine A counter-flow recuperator formed from annular arrays of recuperator core segments. The recuperator core segments are formed from two opposing sheets of fin fold material coined to form a primary surface zone disposed between two flattened manifold zones. Each prima... | 12/12/2006 |
| 7112036 | Rotor and bearing system for a turbomachine A rotor and bearing system for a turbomachine. The turbomachine includes a drive shaft, an impeller positioned on the drive shaft, and a turbine positioned on the drive shaft proximate to the impeller. The bearing system comprises one gas journal bearing supporting ... | 09/26/2006 |
| 7092262 | System and method for pre-charging the DC bus of a utility connected power converter A system and method for pre-charging the DC bus of a utility connected power converter. In one embodiment, a full-wave rectifier circuit is coupled to the utility grid through an isolation transformer and circuit protector. The rectifier circuit output is connected ... | 08/15/2006 |
| RE39190 | Compliant foil fluid film radial bearing A multi-segment radial bearing including a bushing with an interior bore having a plurality of anti-rotation retainers which are equally spaced and extend the axial length of the interior bore. The generally T-shaped retainers divide the interior bore of the bushing... | 07/18/2006 |
| 7065873 | Recuperator assembly and procedures A construction of recuperator core segments is provided which insures proper assembly of the components of the recuperator core segment, and of a plurality of recuperator core segments. Each recuperator core segment must be constructed so as to prevent nesting of fi... | 06/27/2006 |
| 6960840 | Integrated turbine power generation system with catalytic reactor The invention provides integrated turbogenerators having a turbine wheel, a compressor impeller, and a motor generator mounted to or mechanically constrained to a common shaft, and improved components and configurations thereof. ... | 11/01/2005 |
| 6958550 | Method and system for control of turbogenerator power and temperature A power controller controls the turbine of a turbine powered generating system regardless of the load on the system to maximize the efficiency of the turbine and maintains the turbine at a substantially constant temperature during a system load change by using an en... | 10/25/2005 |
| 6951110 | Annular recuperator design An annular heat recuperator is formed with alternating hot and cold cells to separate counter-flowing hot and cold fluid streams. Each cold cell has a fluid inlet formed in the inner diameter of the recuperator near one axial end, and a fluid outlet formed in the ou... | 10/04/2005 |
| 6870279 | Method and system for control of turbogenerator power and temperature A power controller controls the turbine of a turbine powered generating system regardless of the load on said system to maximize the efficiency of the turbine and maintains the turbine at a substantially constant temperature during a system load change by using an e... | 03/22/2005 |
| 6864595 | Detection of islanded behavior and anti-islanding protection of a generator in grid-connected mode A method of controlling a generator system connected to an electric power system in which the output frequency characteristic of the generator system is measured, a first phase angle and frequency of the measured frequency characteristic is estimated using a first p... | 03/08/2005 |
| 6815932 | Detection of islanded behavior and anti-islanding protection of a generator in grid-connected mode A method of controlling a generator system connected to an electric power system in which the output frequency characteristic of the generator system is measured, a first phase angle and frequency of the measured frequency characteristic is estimated using a first p... | 11/09/2004 |
| 6812587 | Continuous power supply with back-up generation A continuous power supply may include a turbogenerator to provide power to supply the load and or an energy storage element and possibly also to the primary energy source. Utilizing an isolated DC bus architecture permits bi-directional power flow among interconnect... | 11/02/2004 |
| 6812586 | Distributed power system A power generation system is disclosed. In one embodiment, the power generation system includes a fuel source, a turbogenerator coupled to the fuel source, and a power controller coupled to the turbogenerator. The power controller includes an AC/DC power converter t... | 11/02/2004 |
| 6804946 | Combustion system with shutdown fuel purge Upon shutdown of a liquid fuel turbine engine, the liquid fuel supply is turned off and compressed air is passed through the fuel lines and fuel injectors to purge all remaining liquid fuel into the combustion chamber to be combusted therein. ... | 10/19/2004 |
| 6787933 | Power generation system having transient ride-through/load-leveling capabilities A power generation system includes a turbogenerator having a motor/generator and a turbine coupled to a common shaft, and generates AC power. A first power converter is coupled to the turbogenerator and a DC bus and converts the AC power to DC power on the DC bus. A... | 09/07/2004 |
| 6784565 | Turbogenerator with electrical brake In an integrated turbogenerator system having an air intake for a compressor to supply combustion air to a combustor, an electric brake device such as a resistor is connected to the electrical power output of the turbogenerator and is situated in the air intake to b... | 08/31/2004 |
| 6751941 | Foil bearing rotary flow compressor with control valve A fuel delivery system supplies fuel to a turbogenerator or to another heat engine. A fuel delivery system according to the present disclosure may include a fuel compressor, a fuel control valve, and a fuel flow controller. A fuel delivery system may have multiple m... | 06/22/2004 |
| 6748742 | Microturbine combination systems According to the present disclosure, a turbogenerator system may be combined with other heat/energy sources. A simple cycle or recuperated cycle turbogenerator have a variety of fuel options and grid connect or stand alone capability that can be combined with one or... | 06/15/2004 |
| 6747372 | Distributed control method for multiple connected generators An energy generation network according to the present disclosure includes energy generating elements organized in a tree structure of superior and inferior system levels, with control systems and a communication network. In a currently preferred embodiment, energy g... | 06/08/2004 |
| 6732531 | Combustion system for a gas turbine engine with variable airflow pressure actuated premix injector The present disclosure provides a turbogenerator system having a turbine mounted for rotation on a shaft, a motor/generator coupled with the shaft for rotation therewith. A combustor for combusting fuel and compressed air to generate combustion gases for rotating th... | 05/11/2004 |
| 6720685 | Turbogenerator cooling method A turbogenerator cooling system is disclosed that has a cylindrical heat sink with generally axially extending fins on both the outside and inside of a hoop section. The hoop section is solid except for holes adjacent to the rear end thereof. The generator stator is... | 04/13/2004 |
| 6713892 | Automatic turbogenerator restarting system A method and system to automatically restart a permanent magnet turbogenerator/motor when a fatal fault is detected. The automatic restart logic includes time constraints and limitations on the number of iterations, and is useful regardless of whether the permanent ... | 03/30/2004 |
| 6709243 | Rotary machine with reduced axial thrust loads A rotary machine includes a helical flow compressor/turbine and a permanent magnet motor/generator including a housing with a stator positioned therein. A shaft is rotatably supported within the housing. A permanent magnet rotor is mounted on a shaft and operatively... | 03/23/2004 |
| 6702463 | Compliant foil thrust bearing A compliant foil fluid thrust bearing has a single sided or two sided thrust disk rotor, an integrally formed compliant foil member, and an underspring member. The non-rotating but compliant foils are located adjacent to the thrust face or faces or the ro... | 03/09/2004 |
| 6684642 | Gas turbine engine having a multi-stage multi-plane combustion system A low emissions combustion system with a plurality of tangential fuel injectors to introduce a fuel/air mixture at the combustor dome end of an annular combustion chamber in two spaced injector planes. Each of the spaced injector planes includes multiple ... | 02/03/2004 |
| 6683389 | Hybrid electric vehicle DC power generation system A hybrid electric vehicle, such as a bus or delivery vehicle, includes batteries and a turbogenerator/motor connected through a double conversion control system. The batteries and the turbogenerator/motor are each connected to a DC bus through bi-directio... | 01/27/2004 |
| 6675583 | Combustion method Upon shutdown of a liquid fuel turbine engine, the liquid fuel supply is turned off and compressed air is passed through the fuel lines and fuel injectors to purge all remaining liquid fuel into the combustion chamber to be combusted therein.... | 01/13/2004 |
| 6664653 | Command and control system for controlling operational sequencing of multiple turbogenerators using a selected control mode A command and control system and method for multiple turbogenerators in a grid parallel system includes a master controller to start, sequence, coordinate power commands, and provide fault handling to each of the individual turbogenerators and the specifi... | 12/16/2003 |
| 6664654 | System and method for dual mode control of a turbogenerator/motor A method of controlling a permanent magnet turbogenerator/motor includes providing a protected load connected in parallel with the turbogenerator/motor through a pulse width modulated inverter configured in a first operating mode to supply controlled curr... | 12/16/2003 |
| 6657348 | Rotor shield for magnetic rotary machine A magnet machine includes a magnet rotor. The rotor includes a sleeve and a magnet. The magnet is positioned within the sleeve. A highly electrically conductive, nonmagnetic shield surrounds the magnet. The shield reduces rotor eddy current losses and low... | 12/02/2003 |
| 6657332 | Turbogenerator cooling system A turbogenerator cooling system is disclosed that has a cylindrical heat sink with generally axially extending fins on both the outside and inside of a hoop section. The hoop section is solid except for holes adjacent to the rear end thereof. The generato... | 12/02/2003 |
| 6639328 | Microturbine/capacitor power distribution system A power generation system is disclosed. In one embodiment, the power generation system includes a fuel source to provide fuel, a turbogenerator, coupled to the fuel source, to generate AC power, and a power controller electrically coupled to the turbogene... | 10/28/2003 |
| 6634176 | Turbine with exhaust vortex disrupter and annular recuperator In a turbine engine with an annular recuperator surrounding the turbine, exhaust gas is directed from the turbine to the recuperator by a generally curved exhaust dome. A vortex disrupter structure extends from the exhaust dome to a point distal of the tu... | 10/21/2003 |
| 6629064 | Apparatus and method for distortion compensation Distortion compensation controller reduces harmonic distortion in an AC circuit current and/or voltage of a power converter bridge operating under digital current and/or voltage control. Within distortion compensation controller, an array of memory locati... | 09/30/2003 |
| 6612112 | Transient turbine exhaust temperature control for a turbogenerator A turbogenerator is controlled by a temperature loop that provides fuel to the combustor to maintain a desired turbine exhaust temperature, and by a speed control loop that controls the speed of the turbogenerator to provide a desired power output. When t... | 09/02/2003 |
| 6552440 | Automatic turbogenerator restarting method and system A method and system to automatically restart a permanent magnet turbogenerator/motor when a fatal fault is detected. The automatic restart logic includes time constraints and limitations on the number of iterations, and is useful regardless of whether the... | 04/22/2003 |
| 6539720 | Generated system bottoming cycle A closed loop Rankine bottoming cycle including a heat exchanger coupled to an exhaust port of a first turbogenerator for heating a pressurized refrigerant into a gaseous phase, and a second turbogenerator (e.g., a turbo expander) coupled to the heat exch... | 04/01/2003 |
