US20090200809A1 - Reconfigurable power system using multiple phase-set electric machines - Google Patents
Reconfigurable power system using multiple phase-set electric machines Download PDFInfo
- Publication number
- US20090200809A1 US20090200809A1 US12/012,990 US1299008A US2009200809A1 US 20090200809 A1 US20090200809 A1 US 20090200809A1 US 1299008 A US1299008 A US 1299008A US 2009200809 A1 US2009200809 A1 US 2009200809A1
- Authority
- US
- United States
- Prior art keywords
- power
- flywheel
- electric machine
- grid
- gas turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
Description
- 1. Field of the Invention
- A reconfigurable power system that comprises multiple loads and prime movers and electric machines connected to an AC bus via power electronic devices.
- 2. Description of the Prior Art
- Efforts have been underway to develop high-speed generators and power converters used to transfer power between a high speed turbine, a high speed energy storage flywheel and a 450 Vrms, 3-phase, 60 Hz distribution system. The system would incorporate high speed generators which convert rotational energy to electrical energy, rectifiers that convert high frequency AC power to DC power and inverters which convert DC power to AC power. The system also includes a high frequency drive motor to allow charging of the flywheel energy store directly from the 450 Vrms 3-phase Hz distribution grid. During discharge of the flywheel energy store, the power flow can be directed to the 450 Vrms distribution grid or be rectified and routed through the inverters.
- Although the system noted hereinabove when implemented, will meet the system requirements, it would be desireable if the system had the capability of being reconfigured such that the flywheel portion is essentially capable of operating as a full back-up to the turbine portion of the system. In addition, it would be desireable if the high speed generators were multiple phase-set electric machines.
- The present invention provides a reconfigurable power system that comprises multiple loads and prime movers and electric machines connected to an AC bus utilizing multiple phase-set electrical machines in conjunction with suitable power electronic devices.
- The advantages of this system is that common power electronic devices can be used for both the flywheel and turbine (both potential loads and prime movers), and common electric machines can be used for coupling with both flywheel and turbine. The nature of the power requirements of a flywheel are well suited for a multiple phase set electric machine. In particular, when providing power to the flywheel, the power demand is low and when power is extracted from the flywheel a much higher power capacity electric machine is needed. A multiple phase set electric machine can be configured to run on one phase set (or any number of phase sets corresponding to the number of power electronic devices dedicated for a variable frequency drive), when motoring the flywheel and all of the phase sets when providing power to the grid through the same power electronic devices normally used to provide power to the grid from the multiple phase set electric machine coupled to the turbine. Some built-in system redundancy can be provided, but if common electric machines are used and common electric power electronic devices are used, then what would otherwise be a special purpose variable frequency drive for motoring the flywheel can be eliminated in favor of one of the common power electronic devices. If a common power electronic device normally feeding generating power to the grid fails, then the system user has the option of re-configuring the system using the common power electronic device normally serving as a variable frequency device and vice versa. This system re-configuration could be performed on a real-time as needed basis; for example the flywheel could be powered periodically rather than continuously as the needs and priority of the system change.
- The present invention thus provides an efficient power system comprising a number of electric machines with multiple phase set stators and power electronic devices (which may or may not include switch gear and filters) configured to provide bi-directional power flow through at least one of the electric machines. In particular, a first electric machine is coupled to a turbine engine and a second electric machine is coupled to a flywheel. The first electric machine is used as a motor to start the turbine and as a generator when the turbine is producing power. The second machine is used as a motor to “spin up” the flywheel and as a generator when the flywheel is providing power.
- For a better understanding of the present invention as well as other objects and further features thereof, reference is made to the following description which is to be read in conjunction with the accompanying drawing wherein:
-
FIG. 1 illustrates a preferred embodiment of the system of the present invention; -
FIG. 2 illustrates an operating mode of the preferred embodiment shown inFIG. 1 wherein the electric machine acts as a motor to start the turbine and the flywheel portion of the system is charging, both sub-systems being independent; -
FIG. 3 illustrates an operating mode of the preferred embodiment shown inFIG. 1 wherein the turbine operates to run the elective machine as a generator and the flywheel is charging, each sub-system acting independently; -
FIG. 4 illustrates an operating mode of the preferred embodiment shown inFIG. 1 wherein the gas turbine is off-line and the flywheel is discharging, both sub-systems acting cooperatively; -
FIG. 5 illustrates an alterative embodiment wherein a DC connection is provided; and -
FIG. 6 illustrates an operating mode of system shown inFIG. 5 wherein the gas turbine is on-line and the flywheel is discharging, both sub-system acting cooperatively. - Referring to
FIG. 1 , thereconfigurable power system 10 using multiple phase-set electric machines in accordance with the teachings of the present invention is illustrated.Electric machines 12 and 14 (although only two machines are illustrated, more than that number can be utilized) are illustrated as being coupled toturbine 16 andflywheel 18, respectively (although other prime movers can be utilized).System 10 is configured to provide bi-directional power flow in at least one of theelectric machines Electric machine 12, coupled viashaft 20 toturbine 16, can be used as a motor to startturbine 16 and, alternately, as a generator whenturbine 16 is producing electric power.Electric machine 14, coupled toflywheel 18 viashaft 22, is used as a motor to “spin up”flywheel 18 and as a generator when the flywheel is generating electric power. As is well known, flywheels store kinetic energy to be used in driving a machine for a short time period and functions essentially as a back-up in case of a system power failure. - The preferred electric machine for use in
system 10 is disclosed in copending application Ser. No. 11/751,450, filed May 21, 2007 and assigned to the assignee of the present invention. The advantages of using such a machine is described in that application and the teachings thereof necessary for an understanding of the present invention is incorporated herein by reference. The multi-phase winding sets used in the machine can be independent, space shifted, three phase winding sets. Each set is supplied by a dc-ac power electronics building block (“PEBB”), such asblock 156 discussed hereinafter. Permanent-magnet machines are the preferred machine topology. - Referring to that portion of
system 10 involvingturbine 16, the output from four sets of threephase windings machine 12 is coupled toswitches switches output filters block 70 comprising a series of AC/DC and DC/AC converters, the output therefrom being coupled to input/output filters phase AC bus 100,bus 100 operating at a frequency range between 50 and 60 hz and at a voltage range between 450V and 1000 VAC. The AC/DC converters compriseblocks blocks - Referring to that portion of
system 10 involvingflywheel 18, the output from four sets of three phase winding 110, 112, 114 and 116 are, in one version, coupled to switches 40, 42, 44 and 46, the system then operating in the manner described hereinabove with reference tomachine 12. In some modes of operation, three phase winding 116 is connected to VFD (variable frequency drive) 150 comprisingswitch 152, input/output filter 154, AC/DC converter 156 DC/AC converter 158 and input/output filter 160. The output of VFD 150 is connected to threephase AC bus 101.Blocks high speed turbine 16 and motor/generator 12 togrid 100 or motor/generator 14 andflywheel 18 togrid 101. - The flywheel generates power while the
gas turbine 16 is generating power through thehigh speed generator 12 or whengas turbine 16 is disconnected from thesystem 10. - The
system 10 described hereinabove has three modes of operation. In the first mode,blocks 150, powered bybus 101, causesmachine 14 to operate as a motor to spin-up flywheel 18 (switch 152 closes the connection betweenmachine 14 and PEBB 150) and switches 40, 42, 44 and 46connect machine 12, operating as a generator, to grid 100 through the filters andblock 70. In the second mode (FIG. 3 ),blocks 150, powered bybus 101, causesmachine 14 to operate as a motor to maintain power on the flywheel 18 (switch 152 is open) and switches 40, 42, 44 and 46connect machine 12, operating as a generator, to grid 100 through the filters andblock 70. When there is a failure (FIG. 4 ) ingas turbine 16 or generator 12 (or if there is a requirement for power from the flywheel), switches 40, 42, 44 and 46disconnect generator 12 andturbine 16 and instead connect tomachine 14 which is running as a generator asflywheel 18 feeds power back togrid 100 through thefilters block 70. - In an alternate mode of operation, when the system requests power simultaneously from
gas turbine 16 andflywheel 18,flywheel 18 is sized to handle the peak load (turbine power, base load and any pulsed load or overload) so whenflywheel 18 is on line it provides sufficient power for the total peak load. This eliminates the need forgas turbine 16 to supply power to the load thereby providing a system with improved efficiency over the prior art sincegas turbine 16 is optimized for the base load only and would be unloaded when the load increases beyond the base load. - Under normal operation, the switch blocks are connecting the
gas turbine 16 to PEBB block, or converter, 70 and then toAC grid 100; at this time,switch 152 is connecting themotor 14 toflywheel 18 to keep the flywheel spinning, i.e. storing energy and ready for use. When thegenerator 12 andturbine 16 is disconnected from the system byswitches flywheel generator 14 is connected to feed the base load and the additional pulsed or peaking load. When a pulsed or peaking load is completed, switches 40, 42 . . . 46 reconnectgas turbine 16 which is still operational even through having been disconnected from the system. Theswitch 152 connectingflywheel 18 is the same as switches 40, 42 . . . 46 and comprise dual pole transfer switches, either for connecting the generator turbine/generator to theAC grid 100 or for connecting the flywheel/generator grid 100. - The PEBB is used to control the electric machine coupled to the turbine such that it switches between functioning as a motor or a generator “on the fly” i.e. the direction of power flow determines if the electric machine is a motor or generator (the PEBB corresponds to the AC/DC blocks forming converter 70). Alternatively, a separate active module could be used for motoring and a separate possible module used for generating. In this case, a contactor can be used to toggle which PEBB is active. In the case of starting the
turbine 16 and then using the turbine as a prime mover, the contactor would only be switched after the rotation of the turbine is self-sustained. Otherwise, any active PEBB would be used without a contactor. - Each PEBB preferably comprises a three-phase diode bridge or active rectifiers (diode blocks are not used as dc-ac blocks; if a 2-level insulated-gate bipolar transistor three phase bridge is used as a AC/DC converter then the same bridges can be used as DC/AC converter).
- The time-dominant mode of operation for the electric machine coupled to the flywheel is low power motoring (only providing make-up and initial spin-up power).
- The key differences between both power paths are the time involved and the disparate power levels for motoring and generating for the turbine and flywheel.
- Since the charge/discharge (motoring/generating) cycles of the flywheel are significantly disproportionate in power requirements, the ability to have a
variable frequency device 150 essentially χ/N (wherein χ is preferably 1 and N the number of phase sets) allows the system to use the same PEBB's for both turbine generating and flywheel generating. - In summary,
system 10 provides a power generation system that consists of a gas turbine/generator (or multiples thereof) and a motor/generator that is spinning a flywheel.System 10 can be a stand alone network or can be used to support an existing AC network handling peak loads. For example, the AC network might be able to handle 5 MW continuously, but there can be loads that can come in and out intermittently that are approximately 10 MW. In that case,system 10 can be used to support the extra load. A unique feature of thesystem 10 is that the same machine, configured as a space shifted split stator as disclosed in the copending '450 application can be used to be the generator rotated bygas turbine 16 and also the motor/generator 14 spinning flywheel 18 (as a motor) and rotated by the flywheel acting as a generator. The PEBB's used in the system can also be identical on the AC/DC side and DC/AC side. One block that is AC/DC can be used to spin, or rotate, the motor that spins upflywheel 18. Multiples (N) of the same blocks can be utilized to convert the energy from the flywheel/generator 18 to feed back to the bus, or grid, 100. The same blocks are used to convert the energy from thegas turbine generator 16 to the common AC bus, orgrid 100. The reconfiguration enables switching between the flywheel/generator generator -
System 10 can be adapted to the following configurations: (1) using multiple PEBB's that are switched from the flywheel subsystem to the gas turbine subsystem; (2) the flywheel subsystem contains at least one conventionally wound three-phase machine; (3) the flywheel sub-system contains multiple flywheels, motor/generators, PEBB modules, not necessarily in a 1:1:1 relationship. -
FIG. 2 illustrates a variation of the system shown inFIG. 1 . In particular,system 100′ comprisessubsystems sub-system 102 functioning to start gas turbine (generator) 106 viamotor 108. Sub-system 104 functions to charge (rotate)flywheel 110 utilizingmotor 112. The power flow ofsub-systems arrow 114.Subsystems -
FIG. 3 illustrates the system ofFIG. 1 wherein (system 200 comprisingsub-systems 202 and 204)gas turbine 206 insub-system 202 operates in a manner such thatgenerator 208 generates AC power in the direction ofarrows 210.Sub-system 204 utilizesmotor 212 to charge (rotate)flywheel 214. Power flows in the direction ofarrow 216.Sub-system motor 212 is used to provide make-up and initial spin-up power forflywheel 214. -
FIG. 4 illustrates the system ofFIG. 1 wherein thegas turbine 16 is off-line andflywheel 18 is discharging (rotating) and causinggenerator 12 to generate power. Sincesub-systems generator 14 flows to the switches insub-system 302 and then to thegrid 100 as illustrated byarrows 306. -
FIG. 5 illustratessystem 400 comprisingsub-systems sub-systems FIG. 4 an AC connection is shared. -
FIG. 6 illustratessystem 500 comprisingsub-systems system 400.System 500 is used to meet temporary peak power demand. In particular,flywheel 504 has the capacity to work simultaneously withgas turbine 508 to meet peak power demand. In this system the gas turbine DC/AC modules are rated for peak power and can use passive rectification and flywheel AC/DC modules are selected for active rectification and are rated for flywheel charging. The negative DC connection can be always active; the positive DC connection requires a contactor for safety and/or margin reasons. - While the invention has been described with reference to its preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the true spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its essential teachings.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/012,990 US7573144B1 (en) | 2008-02-07 | 2008-02-07 | Reconfigurable power system using multiple phase-set electric machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/012,990 US7573144B1 (en) | 2008-02-07 | 2008-02-07 | Reconfigurable power system using multiple phase-set electric machines |
Publications (2)
Publication Number | Publication Date |
---|---|
US7573144B1 US7573144B1 (en) | 2009-08-11 |
US20090200809A1 true US20090200809A1 (en) | 2009-08-13 |
Family
ID=40934295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/012,990 Active US7573144B1 (en) | 2008-02-07 | 2008-02-07 | Reconfigurable power system using multiple phase-set electric machines |
Country Status (1)
Country | Link |
---|---|
US (1) | US7573144B1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070293104A1 (en) * | 2003-09-02 | 2007-12-20 | Normann Sandoy | Propulsion System for Ships |
US7710081B2 (en) * | 2006-10-27 | 2010-05-04 | Direct Drive Systems, Inc. | Electromechanical energy conversion systems |
US8040007B2 (en) | 2008-07-28 | 2011-10-18 | Direct Drive Systems, Inc. | Rotor for electric machine having a sleeve with segmented layers |
US20170359009A1 (en) * | 2016-06-08 | 2017-12-14 | Hamilton Sundstrand Corporation | High voltage dc power generating system including selectively removable neutral node |
US10284126B2 (en) * | 2011-01-30 | 2019-05-07 | Weijia Chen | Method of generating electricity by an alternator and a generator using the same |
US11196310B2 (en) | 2018-07-30 | 2021-12-07 | Zunum Aero, Inc. | Permanent magnet assemblies for a cylinder of an electrical machine |
US11296569B2 (en) | 2018-07-12 | 2022-04-05 | Zunum Aero, Inc. | Multi-filar coil winding for electric machine |
US11387764B2 (en) | 2018-07-12 | 2022-07-12 | Zunum Aero, Inc. | Multi-inverter system for electric machine |
US11770047B2 (en) | 2018-03-09 | 2023-09-26 | Alexey TYSHKO | Power grid stabilization system utilizing two generators mechanically linked via continuous variable transmission |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7633172B2 (en) * | 2003-06-06 | 2009-12-15 | Pentadyne Power Corporation | Three plus three phase flywheel power supply |
EP2595266B1 (en) * | 2011-11-18 | 2018-08-22 | GE Energy Products France SNC | Electric power-facility provided with a means for storing power and method for controlling such a facility |
US9647508B2 (en) * | 2012-09-27 | 2017-05-09 | Mestek, Inc. | HVAC system having kinetic energy storage device |
GB2543182B (en) | 2013-03-11 | 2017-11-08 | Trane Int Inc | Controls and operation of variable frequency drives |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2783393A (en) * | 1953-11-30 | 1957-02-26 | Haegglund & Soener Ab | Apparatus for emergency power transfer |
US4460834A (en) * | 1983-08-29 | 1984-07-17 | Power Group International Corp. | Uninterruptible power system |
US4857755A (en) * | 1988-09-27 | 1989-08-15 | Comstock W Kenneth | Constant power system and method |
US5398571A (en) * | 1993-08-13 | 1995-03-21 | Lewis; David W. | Flywheel storage system with improved magnetic bearings |
US5821630A (en) * | 1995-11-13 | 1998-10-13 | Schutten; Herman P. | Flywheel-speed sensing for control of an emergency-power engine |
US6020657A (en) * | 1997-08-27 | 2000-02-01 | Perfect Power Inc. | Power supply for providing instantaneous energy during utility power outages |
US6169390B1 (en) * | 1999-05-12 | 2001-01-02 | Abb Power T&D Company Inc. | Flywheel-microturbine system |
US6507128B2 (en) * | 2001-05-23 | 2003-01-14 | General Electric Company | Low-energy storage fast-start uninterruptible power supply system and method |
US6559559B2 (en) * | 2000-05-31 | 2003-05-06 | Sure Power Corporation | Power system utilizing a DC bus |
US6563229B2 (en) * | 2001-04-18 | 2003-05-13 | Otto Farkas | Standby power system |
US20030137196A1 (en) * | 2002-01-24 | 2003-07-24 | Abraham Liran | Power supply for providing continuous and regulated energy to the power user |
US6879053B1 (en) * | 2002-10-22 | 2005-04-12 | Youtility, Inc. | Transformerless, load adaptive speed controller |
US7042108B2 (en) * | 2004-02-06 | 2006-05-09 | Otto Farkas | Backup power system |
US7071581B2 (en) * | 2001-01-31 | 2006-07-04 | Satcon Technology Corp. | Uninterruptible power supply system using a slip-ring, wound-rotor-type induction machine and a method for flywheel energy storage |
US7108095B1 (en) * | 2002-11-13 | 2006-09-19 | Jerry Washington | System and method for generating power |
US20070119639A1 (en) * | 2005-11-28 | 2007-05-31 | Villagrana Ernesto G | Secondary power system for automobiles |
US7400052B1 (en) * | 2006-11-29 | 2008-07-15 | Active Power, Inc. | Transient energy systems and methods for use of the same |
US20080203734A1 (en) * | 2007-02-22 | 2008-08-28 | Mark Francis Grimes | Wellbore rig generator engine power control |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9016483D0 (en) * | 1990-07-27 | 1990-09-12 | Dale Electric Of Great Britain | Wind powered electricity generating system |
-
2008
- 2008-02-07 US US12/012,990 patent/US7573144B1/en active Active
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2783393A (en) * | 1953-11-30 | 1957-02-26 | Haegglund & Soener Ab | Apparatus for emergency power transfer |
US4460834A (en) * | 1983-08-29 | 1984-07-17 | Power Group International Corp. | Uninterruptible power system |
US4857755A (en) * | 1988-09-27 | 1989-08-15 | Comstock W Kenneth | Constant power system and method |
US5398571A (en) * | 1993-08-13 | 1995-03-21 | Lewis; David W. | Flywheel storage system with improved magnetic bearings |
US5821630A (en) * | 1995-11-13 | 1998-10-13 | Schutten; Herman P. | Flywheel-speed sensing for control of an emergency-power engine |
US6020657A (en) * | 1997-08-27 | 2000-02-01 | Perfect Power Inc. | Power supply for providing instantaneous energy during utility power outages |
US6169390B1 (en) * | 1999-05-12 | 2001-01-02 | Abb Power T&D Company Inc. | Flywheel-microturbine system |
US6559559B2 (en) * | 2000-05-31 | 2003-05-06 | Sure Power Corporation | Power system utilizing a DC bus |
US7071581B2 (en) * | 2001-01-31 | 2006-07-04 | Satcon Technology Corp. | Uninterruptible power supply system using a slip-ring, wound-rotor-type induction machine and a method for flywheel energy storage |
US6563229B2 (en) * | 2001-04-18 | 2003-05-13 | Otto Farkas | Standby power system |
US6507128B2 (en) * | 2001-05-23 | 2003-01-14 | General Electric Company | Low-energy storage fast-start uninterruptible power supply system and method |
US7129593B2 (en) * | 2001-05-23 | 2006-10-31 | General Electric Company | Low-energy storage fast-start uninterruptible power supply method |
US20030137196A1 (en) * | 2002-01-24 | 2003-07-24 | Abraham Liran | Power supply for providing continuous and regulated energy to the power user |
US6969922B2 (en) * | 2002-10-22 | 2005-11-29 | Youtility, Inc | Transformerless, load adaptive speed controller |
US6879053B1 (en) * | 2002-10-22 | 2005-04-12 | Youtility, Inc. | Transformerless, load adaptive speed controller |
US7108095B1 (en) * | 2002-11-13 | 2006-09-19 | Jerry Washington | System and method for generating power |
US7042108B2 (en) * | 2004-02-06 | 2006-05-09 | Otto Farkas | Backup power system |
US20070119639A1 (en) * | 2005-11-28 | 2007-05-31 | Villagrana Ernesto G | Secondary power system for automobiles |
US7400052B1 (en) * | 2006-11-29 | 2008-07-15 | Active Power, Inc. | Transient energy systems and methods for use of the same |
US20080203734A1 (en) * | 2007-02-22 | 2008-08-28 | Mark Francis Grimes | Wellbore rig generator engine power control |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070293104A1 (en) * | 2003-09-02 | 2007-12-20 | Normann Sandoy | Propulsion System for Ships |
US8299638B2 (en) * | 2003-09-02 | 2012-10-30 | Inpower As | Propulsion system for ships |
US7710081B2 (en) * | 2006-10-27 | 2010-05-04 | Direct Drive Systems, Inc. | Electromechanical energy conversion systems |
US20100244599A1 (en) * | 2006-10-27 | 2010-09-30 | Saban Daniel M | Electromechanical energy conversion systems |
US7960948B2 (en) * | 2006-10-27 | 2011-06-14 | Direct Drive Systems, Inc. | Electromechanical energy conversion systems |
US8179009B2 (en) | 2008-07-28 | 2012-05-15 | Direct Drive Systems, Inc. | Rotor for an electric machine |
US8421297B2 (en) | 2008-07-28 | 2013-04-16 | Direct Drive Systems, Inc. | Stator wedge for an electric machine |
US8237320B2 (en) | 2008-07-28 | 2012-08-07 | Direct Drive Systems, Inc. | Thermally matched composite sleeve |
US8247938B2 (en) | 2008-07-28 | 2012-08-21 | Direct Drive Systems, Inc. | Rotor for electric machine having a sleeve with segmented layers |
US8253298B2 (en) | 2008-07-28 | 2012-08-28 | Direct Drive Systems, Inc. | Slot configuration of an electric machine |
US8040007B2 (en) | 2008-07-28 | 2011-10-18 | Direct Drive Systems, Inc. | Rotor for electric machine having a sleeve with segmented layers |
US8310123B2 (en) | 2008-07-28 | 2012-11-13 | Direct Drive Systems, Inc. | Wrapped rotor sleeve for an electric machine |
US8350432B2 (en) | 2008-07-28 | 2013-01-08 | Direct Drive Systems, Inc. | Electric machine |
US8415854B2 (en) | 2008-07-28 | 2013-04-09 | Direct Drive Systems, Inc. | Stator for an electric machine |
US8183734B2 (en) | 2008-07-28 | 2012-05-22 | Direct Drive Systems, Inc. | Hybrid winding configuration of an electric machine |
US10284126B2 (en) * | 2011-01-30 | 2019-05-07 | Weijia Chen | Method of generating electricity by an alternator and a generator using the same |
US20170359009A1 (en) * | 2016-06-08 | 2017-12-14 | Hamilton Sundstrand Corporation | High voltage dc power generating system including selectively removable neutral node |
US9941827B2 (en) * | 2016-06-08 | 2018-04-10 | Hamilton Sundstrand Corporation | High voltage DC power generating system including selectively removable neutral node |
US11770047B2 (en) | 2018-03-09 | 2023-09-26 | Alexey TYSHKO | Power grid stabilization system utilizing two generators mechanically linked via continuous variable transmission |
US11296569B2 (en) | 2018-07-12 | 2022-04-05 | Zunum Aero, Inc. | Multi-filar coil winding for electric machine |
US11387764B2 (en) | 2018-07-12 | 2022-07-12 | Zunum Aero, Inc. | Multi-inverter system for electric machine |
US11196310B2 (en) | 2018-07-30 | 2021-12-07 | Zunum Aero, Inc. | Permanent magnet assemblies for a cylinder of an electrical machine |
Also Published As
Publication number | Publication date |
---|---|
US7573144B1 (en) | 2009-08-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7573144B1 (en) | Reconfigurable power system using multiple phase-set electric machines | |
US10298212B2 (en) | Method and apparatus for control of pulsed power in hybrid energy storage module | |
JP5291763B2 (en) | Motor drive device having energy storage unit | |
US20150283911A1 (en) | Vehicle power sharing and grid connection system for electric motors and drives | |
CN102460899B (en) | Emergency power supply device | |
JP2001500356A (en) | Independent electrical system including prime mover and asynchronous machine with inverter / rectifier | |
JP2002165497A (en) | Microturbine power generating system and microturbine power generating method | |
JP2010070185A (en) | System and method for providing uninterruptible power supply to ship-service bus of large-sized marine vessel | |
US8723358B2 (en) | Line interactive power quality system | |
CN101047340A (en) | Power generation system and method | |
US9112375B2 (en) | Flywheel and battery-based power supply system | |
JP2015511108A (en) | Operation method of electric unit for pumped storage power plant | |
CN113922495A (en) | Energy storage power station and black start method | |
CN106936269A (en) | Polyphase machine and application method | |
WO2008121045A1 (en) | A device and a method for supplying power to a critical load | |
Pires et al. | A multilevel topology based on the T-type converter for SRM drives | |
US20130038121A1 (en) | Hybrid Construction Machine Control System | |
CN112072781A (en) | Emergency seamless switching system and method for full-water-cooling permanent magnet synchronous diesel generator set | |
JP2001145396A (en) | Composite power generation system | |
CN206255175U (en) | Ship direct current networking propulsion system with batteries to store energy | |
CN104129314A (en) | Dynamical system adopting switch reluctance motor as power transformer | |
RU2781845C1 (en) | Vehicle power supply system | |
CN211629876U (en) | Energy storage flywheel double-electric charging and discharging control device and system | |
CN106741793A (en) | Ship direct current networking propulsion system with batteries to store energy | |
Stoppa et al. | Dual voltage/power system by battery/flywheel configuration |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DIRECT DRIVE SYSTEMS, INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SABAN, DANIEL M.;AHMAD, RAED;PAN, ZHIGUO;REEL/FRAME:020531/0564 Effective date: 20080201 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAT HOLDER NO LONGER CLAIMS SMALL ENTITY STATUS, ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: STOL); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 12 |
|
AS | Assignment |
Owner name: FMC TECHNOLOGIES, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DIRECT DRIVE SYSTEMS, INC.;REEL/FRAME:055899/0710 Effective date: 20201120 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT, TEXAS Free format text: SECURITY INTEREST;ASSIGNORS:FMC TECHNOLOGIES, INC.;SCHILLING ROBOTICS, LLC;REEL/FRAME:064193/0870 Effective date: 20230623 Owner name: DNB BANK ASA, NEW YORK BRANCH, AS ADMINISTRATIVE AGENT, NEW YORK Free format text: SECURITY INTEREST;ASSIGNORS:FMC TECHNOLOGIES, INC.;SCHILLING ROBOTICS, LLC;REEL/FRAME:064193/0810 Effective date: 20230623 |