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Capstone Turbine Corporation Patents
Assignee:
Capstone Turbine Corporation
Address:
Chatsworth, CA
No. of patents:
93
Patents:


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Patent Number Title Of Patent Date Issued
RE40713 Turbogenerator/motor controller May 19, 2009
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 turbogenerator/motor, driving
RE39190 Compliant foil fluid film radial bearing July 18, 2006
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 into a like plurality
RE38373 Compliant foil fluid film thrust bearing with a tilting pad underspring December 30, 2003
A compliant foil fluid film thrust bearing including a thrust disk rotor, fluid foils, spring foils, a thrust plate, and a housing thrust surface The non-rotating but compliant fluid foils, mounted on the thrust plate and/or housing thrust surface and positioned adjacent to the thrust di
D433997 Turbogenerator November 21, 2000
7614792 Compliant foil fluid film radial bearing or seal November 10, 2009
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 plurality of compliant foils
7415764 Recuperator assembly and procedures August 26, 2008
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 fin folds of the adjacen
7147050 Recuperator construction for a gas turbine engine December 12, 2006
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 primary surface zone ha
7112036 Rotor and bearing system for a turbomachine September 26, 2006
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 the drive shaft be
7092262 System and method for pre-charging the DC bus of a utility connected power converter August 15, 2006
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 to the DC bus of the
7065873 Recuperator assembly and procedures June 27, 2006
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 fin folds of the adjacen
6960840 Integrated turbine power generation system with catalytic reactor November 1, 2005
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.
6958550 Method and system for control of turbogenerator power and temperature October 25, 2005
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 energy storage device
6951110 Annular recuperator design October 4, 2005
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 outer diameter of the
6870279 Method and system for control of turbogenerator power and temperature March 22, 2005
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 energy storage device
6864595 Detection of islanded behavior and anti-islanding protection of a generator in grid-connected mo March 8, 2005
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 phase locked loop h
6815932 Detection of islanded behavior and anti-islanding protection of a generator in grid-connected mo November 9, 2004
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 phase locked loop h
6812587 Continuous power supply with back-up generation November 2, 2004
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 interconnected elements.
6812586 Distributed power system November 2, 2004
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 that converts AC power
6804946 Combustion system with shutdown fuel purge October 19, 2004
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.
6787933 Power generation system having transient ride-through/load-leveling capabilities September 7, 2004
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 second power conv
6784565 Turbogenerator with electrical brake August 31, 2004
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 be cooled by the st
6751941 Foil bearing rotary flow compressor with control valve June 22, 2004
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 modes of control pe
6748742 Microturbine combination systems June 15, 2004
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 more external heat
6732531 Combustion system for a gas turbine engine with variable airflow pressure actuated premix inject May 11, 2004
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 the turbine is provided
6720685 Turbogenerator cooling method April 13, 2004
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 press-fitted into the
6713892 Automatic turbogenerator restarting system March 30, 2004
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 magnet turbogenera
6709243 Rotary machine with reduced axial thrust loads March 23, 2004
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 associated with the
6702463 Compliant foil thrust bearing March 9, 2004
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 rotatable disk and are formed a
6684642 Gas turbine engine having a multi-stage multi-plane combustion system February 3, 2004
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 tangential fuel injectors del
6683389 Hybrid electric vehicle DC power generation system January 27, 2004
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-directional power converters operating as
6675583 Combustion method January 13, 2004
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.
6664654 System and method for dual mode control of a turbogenerator/motor December 16, 2003
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 current from the turbogenerator/m
6664653 Command and control system for controlling operational sequencing of multiple turbogenerators us December 16, 2003
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 specific control modes. A bidirectional
6657348 Rotor shield for magnetic rotary machine December 2, 2003
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 lowers rotor operating temperature,
6657332 Turbogenerator cooling system December 2, 2003
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 press-fitted into the
6639328 Microturbine/capacitor power distribution system October 28, 2003
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 turbogenerator. The power controller i
6634176 Turbine with exhaust vortex disrupter and annular recuperator October 21, 2003
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 turbine to evenly distribute the ex
6629064 Apparatus and method for distortion compensation September 30, 2003
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 locations are used, each corresponding
6612112 Transient turbine exhaust temperature control for a turbogenerator September 2, 2003
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 the desired power output is reduce
6552440 Automatic turbogenerator restarting method and system April 22, 2003
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 magnet turbogenera
6539720 Generated system bottoming cycle April 1, 2003
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 exchanger for expanding the gaseous
6522030 Multiple power generator connection method and system February 18, 2003
A method and system for connecting a plurality of power generators, each having an electrical power converter output and adjustable output voltage magnitude and frequency, with at least one digital communications bus to provide synchronization and load sharing. One of the plurality of po
6495929 Turbogenerator power control system December 17, 2002
A power control system for a turbogenerator which provides electrical power to one or more pump-jack oil wells. When the induction motor of a pump-jack oil well is powered by three-phase utility power, the speed of the pump-jack shaft varies only slightly over the pumping cycle but the
6489692 Method and apparatus for controlling rotation of magnetic rotor December 3, 2002
A method and apparatus for starting a turbogenerator having a sensorless magnetic rotor supported for rotation in a stator by a compliant foil fluid film bearing, the method comprising energizing the stator to generate a continuously rotating magnetic field to capture the magnetic ro
6487096 Power controller November 26, 2002
A power controller provides a distributed generation power networking system in which bi-directional power converters are used with a common DC bus for permitting compatibility between various energy components. Each power converter operates essentially as a customized bi-directional
6453658 Multi-stage multi-plane combustion system for a gas turbine engine September 24, 2002
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 tangential fuel injectors del
6438937 System and method for modular control of a multi-fuel low emissions turbogenerator August 27, 2002
A system and method for modular control of a multi-fuel turbogenerator include separate controllers for controlling fuel supplied to the combustor and power output from the generator. The power controller generates a fuel command based on the required turbine exhaust temperature, whe
6437468 Permanent magnet rotor cooling system and method August 20, 2002
A permanent magnet rotor cooling system and method in which the rotor end cap includes an axially extending bore with a plurality of radially extending holes aligned with holes in the sleeve around the permanent magnet to provide cooling air flow to the air gap between the permanent
6425732 Shrouded rotary compressor July 30, 2002
A method of combining an impeller and a shroud includes selecting a rotatable impeller having impeller blades with radially extending distal ends defining a predetermined outer impeller diameter. A shroud element is then selected having an inner diameter less than the outer impeller
6410992 System and method for dual mode control of a turbogenerator/motor June 25, 2002
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 current from the turbogenerator/m
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