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WO/2001/039356A2 |
A transfer of power between an energy storage device and a load is controlled by obtaining a DC voltage from the energy storage device, and controlling a phase angle of AC power delivered to the load to keep the DC voltage substantially ...
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WO/2001/039345A2 |
Power is provided from an energy storage device to a utility network based on a detected condition, such as a fault, in the network. Specifically, it is determined whether a fault on the utility network is a near fault or a far fault rel...
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WO/2000/071375A1 |
The invention relates to an emission-free hybrid engine which comprises an electric motor (1), a battery (4) that drives the electric motor (1), a compressed-air engine (6), a tank (7) for the compressed air that drives the compressed-ai...
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WO/2000/066320A1 |
The invention relates to a machine tool (10) that comprises a plurality of pins (21, 22, 23) that are controlled by a control unit and a central power unit that provides energy originating from a network (29) for driving said pins (21, 2...
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WO/2000/057530A1 |
The power electronics unit is located in a low temperature chamber (1). The energy is supplied in the form of a high alternating voltage and then converted to a low voltage. The bushings for the current conductors leading from the outsid...
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WO/2000/048286A1 |
A voltage recovery device (30) is configured to provide real and reactive power to a utility power network at a predetermined level and for a predetermined duration to recover the voltage on the utility power network within a predetermin...
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WO/2000/028636A2 |
The invention relates to a system (101) for storing electric energy which comprises an energy store (2) which via a power converter (3) can be coupled to a buffer store (4). To reduce electric losses during stand-by operations the invent...
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WO/2000/007278A1 |
The invention concerns an auxiliary power unit using compressed air for energy and equipped with a motor alternator driving, or being driven by a motor compressor with compressed air which compresses air under high pressure in a high pre...
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WO/1999/062164A1 |
The field of the invention relates generally to the stabilization and control of electric power delivered from a utility grid (104) to a load (106). In particular, the field of the invention relates to a shunt connected superconducting e...
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WO/1999/053592A1 |
To continue to supply an electric load (2) connected to an electricity supply network (4) with energy during an interruption in the power supply, the invention provides for a device (1) having an energy storage element (8) from which ele...
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WO1999040668A9 |
Flywheel battery systems having improved energy density are provided. Such systems preferably have an inner rotor (118) mounted coaxially and substantially cylindrically within an outer containment (120) so as to manage the net gyroscopi...
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WO/1999/038240A1 |
A control circuit ideally suited for a capacitor charging circuit (100) that uses an apparent measure of current flow through a circuit line to regulate current drawn from a battery through the circuit line is disclosed. A summing circui...
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WO/1999/034342A1 |
A method and apparatus for detecting a power outage within an energy meter and alerting a remote central computer about the outage using call-in reporting via modem (35) within the meter to a telephone number designated for outage report...
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WO/1999/028921A1 |
The invention relates to an SMES device comprising a coil (1) for connection in series with a voltage source and wound from an elctrically insulated superconducting cable (12). The invention also relates to high voltage system comprising...
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WO/1999/027631A1 |
To efficiently store electric power in a storage battery, a control device turns on and off switches of the power source and the storage battery to intermittently control the driving force of the drive motor (5) mounted on the permanent ...
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WO/1998/047186A1 |
A superconducting magnetic energy storage system, including a superconducting persistent switch, is disclosed. The system includes a superconducting magnet connected in parallel with the persistent switch, both contained within a cryosta...
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WO/1998/043341A1 |
A power supply device for providing uninterrupted power for a period of time is disclosed. The power supply device has a controller and a flywheel device. The flywheel device has a housing (45) that contains a flywheel rotor (15) and a m...
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WO/1998/040955A1 |
A flywheel energy accumulator has a vertical shaft and passive, superconducting magnetic axial bearings (SML) mounted thereon, as well as an inner rotor electric motor/generator whose rotor is mechanically coupled to several flywheels an...
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WO/1997/031418A1 |
A UPS (uninterruptible power system) includes a UPS power conditioning unit that provides conditioned AC power to a critical load. The UPS power conditioning unit includes a variable speed drive that operates in response to AC utility po...
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WO/1997/025763A1 |
The invention concerns a device for the storage of electrical energy, especially alternating current, consisting of chambers which are separated into north and south field areas by permanent magnet plates (1). The chambers are separated ...
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WO/1997/018621A1 |
A system and controller for providing emergency power to an electrical load (6) when a usual source (2) of power for the load has failed includes an electrical dynamo (10), an engine (16) of controllable speed connectable by clutch (14) ...
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WO/1997/013313A2 |
An energy storage and conversion apparatus (1) comprising a containment (5) defining a vacuum chamber (7), a support shaft (9) within the vacuum chamber (7), a stator (11) on the shaft (9) and a cylindrical rotor (13) which, in use, is d...
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WO/1997/013260A1 |
In order to prevent complete failure in a superconductive toroidal magnet system (1) as a result of local overheating in the event of quenching, the magnet segments (3a, 3b) of the system are divided into two groups (a, b), each group (a...
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WO/1997/006592A1 |
A generator device provides a controlled electric output current to a load, and comprises a source of mechanical energy, a gear train connected to the source, a generator connected to the output of the gear train, and a control circuit c...
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WO/1996/038848A1 |
Electrons are arranged so they circulate along a spiral path in a vacuum. The path has a hollow symmetrical shape which is defined by a surface of a toroid. The shape is controllable by a magnetic field and the electrons can be contained...
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WO/1996/015578A1 |
An inductive load driver comprising a DC-DC converter which has a coil (L) and a switch (Sw) in series with a power source (E) and a capacitor (C) provided in parallel with the switch (Sw). The DC-DC converter produces a high voltage by ...
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WO/1996/005646A2 |
An energy storage and conversion apparatus (1) comprising a containment (5) defining a vacuum chamber (7), a substantially vertical shaft within the vacuum chamber (7), a stator (11) on the shaft (9), and a cylindrical rotor (13) which, ...
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WO/1995/024049A1 |
A self-supported superconducting magnetic energy storage sytem is provided. The system includes helically arranged, high current cable-in-conduit superconductor (32) located adjacent a dump shunt (38). Supporting the dump shunt (38) and ...
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WO/1995/012886A1 |
The magnetic energy battery of the present invention comprises a casing, a positive terminal and a negative terminal. The main body of the battery is a cylindrical permanent magnet (1) having two end planar surfaces which are magnetized ...
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WO/1995/002270A1 |
An energy conversion and storage device which comprises a rotor (5) comprising a tubular body portion and a stator (7) comprising one or more electric coils whereby electrical energy may be applied to and extracted from the device when t...
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WO/1995/002273A1 |
A flywheel energy storage and conversion apparatus (1) comprising a stator (5), a rotor (7) incorporating an optical fibre (17), a light source (19) and a detector (21), wherein the optical fibre (17) is carried by rotor (7) such that a ...
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WO/1995/002271A1 |
An energy conversion and storage device (1) which comprises a magnetic rotor (5) and a stator (7) comprising one or more electric coils whereby electrical energy may be applied to and extracted from the device (1) when the rotor (5) is r...
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WO/1995/002272A1 |
A stator (1) comprising a yoke (7) for receiving a plurality of coils (9) which, when energised in use, produce magnetic flux for driving a rotor (3) suspended relative to the stator (1), wherein the magnetic permeability of the yoke (7)...
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WO/1994/014219A1 |
In the device, an electric motor takes the form of a brushless, electronically commutated disc armature motor (201) with permanent magnets arranged on the rotor and air-core windings (202) on the stator. Each winding (202) is fitted with...
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WO/1994/003910A1 |
An energy storage device comprises an array of superconducting electrical coils (1-37) made from low Tc material. The axes of the coils (1-37) are substantially parallel and the coils are laterally spaced apart in a non-overlapping manner.
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WO/1993/021680A1 |
An electric power accumulating apparatus, in which, in the electric power accumulating apparatus for rotating fly wheels, casings of the fly wheels are supported by resilient members supported on the ground, and further, the rocking moti...
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WO/1993/010334A1 |
A steam generating power station (1) has a steam generator (6), a steam turbine (26, 28), a condenser (36), a condensate line (38), a feed water reservoir (44) and a feed water line (46). Heat exchangers (42, 44, 50) are provided in the ...
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WO/1993/003292A1 |
A flywheel (10) having superconductor bearings (110) has a lower drag to lift ratio that translates to an improvement of a factor of ten in the rotational decay rate. The lower drag results from the lower dissipation of melt-processed YB...
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WO/1992/022951A1 |
A superconducting energy stabilizer having multiple load connections employs DC-DC conversion. A discharging DC-DC converter removes stored energy from a superconducting inductive energy storage device or superconducting magnet and deliv...
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WO/1992/022914A1 |
An energy storage device comprises an array of small, electrical coils (1-7) formed from relatively high temperature superconducting material. The coils (1-7) are arranged around a common axis and carry working currents in the same sense.
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WO/1992/016762A1 |
A superconductive bearing device includes a ring-like permanent magnet portion (2) disposed concentrically on a vertical axial rotor (1), and a superconductor (8) disposed below the permanent magnet portion (2) in such a manner as to fac...
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WO/1992/016761A1 |
A superconductive bearing device for supporting rotatably a shaft (rotor) (2) rotating at a high speed, under a non-contact state. A superconductive bearing (4) for supporting the shaft (2) under a non-contact state to a housing (1) incl...
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WO/1992/007371A1 |
A capacitive power supply (200) for powering a portable electrical device, such as a radiotelephone (260). The capacitive power supply (200) is comprised of capacitors (208-236) stacked vertically in a series connection which are of capa...
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WO/1992/005617A1 |
A flywheel intermediate energy store stores electric power produced sporadically by a thermal engine in order to provide a consumer with a continuous supply of electric power. Transformer iron losses are prevented by a transformerless fr...
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WO/1991/020117A2 |
A superconducting magnetic energy storage apparatus comprising a cylindrical superconducting coil; a cylindrical coil containment vessel enclosing the coil and adapted to hold a liquid, such as liquefied helium; and a cylindrical vacuum ...
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WO/1988/008923A1 |
A system is disclosed for retrofitting a plurality of gas turbines for use in compression and expansion stages of a power plant. A first gas turbine (10) is modified to perform as a motor driven air compressor compressing air and storing...
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WO/1988/005125A1 |
Duplication of engine and secondary power system components in individual auxiliary and emergency power units is avoided in an integrated power unit including a gas turbine engine (10) having a centrifugal compressor (28) and a turbine (...
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WO/1983/000362A1 |
The pressure of fluid supplied by a high-pressure line (22) is reduced to a lower pressure suitable for a low-pressure utilization device located in an environment having an electrical grid by interposing a fluid motor (50) between the h...
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WO/1982/000928A1 |
A transmission drive has a flywheel component and includes an electrical machine in the transmission path having an armature adapted for independent rotation with the driving side of the transmission drive and an independently rotatable ...
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WO/1982/000322A1 |
Means for stopping a flywheel type electric power storage apparatus when power service is interrupted, including a thrust plate (11) connected to a rotary section and formed with a thrust bearing surface, and a pressure bearing surface (...
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