Reconfigurable power system using multiple phase-set electric machines
a power system and electric machine technology, applied in the direction of machines/engines, emergency power supply arrangements, electric generator control, etc., can solve the problems of low power demand and need for higher power capacity electric machines, and achieve the effect of low power demand and higher power capacity
Active Publication Date: 2009-08-13
FMC TECH INC
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Benefits of technology
The present invention is a power system that can be reconfigured easily to meet different needs. It uses multiple electric machines and power electronic devices to connect to an AC bus. The system can provide power to both a flywheel and a turbine, and can be reconfigured quickly to meet changing priorities. The use of common power electronic devices and electric machines makes the system more efficient and flexible. Overall, the invention provides a reliable and efficient power system that can adapt to changing needs.
Problems solved by technology
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.
Method used
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Embodiment Construction
[0016]Referring to FIG. 1, the reconfigurable 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 to turbine 16 and flywheel 18, respectively (although other prime movers can be utilized). System 10 is configured to provide bi-directional power flow in at least one of the electric machines 12 and 14. Electric machine 12, coupled via shaft 20 to turbine 16, can be used as a motor to start turbine 16 and, alternately, as a generator when turbine 16 is producing electric power. Electric machine 14, coupled to flywheel 18 via shaft 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 ess...
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A reconfigurable power system that includes a gas turbine, flywheel, a first electric machine coupled to the gas turbine, a second electric machine coupled to the flywheel, the first and second electric machines being substantially similar in configuration, a first power device for coupling power from the first electric machine to a power grid, a second power device coupled to the second electric machine for driving the flywheel and coupling power from the second electric machine to the power grid, and a switch for coupling either the power generated by the first electric machine or the second electric machine to the grid.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]A reconfigurable power system that comprises multiple loads and prime movers and electric machines connected to an AC bus via power electronic devices.[0003]2. Description of the Prior Art[0004]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 thro...
Claims
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IPC IPC(8): H02J9/00F02C6/14H02K7/02
CPCY02E60/16H02J3/30
Inventor SABAN, DANIEL M.AHMAD, RAEDPAN, ZHIGUO
Owner FMC TECH INC