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US20110057517 |
Hybrid Conditioner for a Power System
A hybrid conditioner for filtering harmonics in a power system that includes a non-linear load. The hybrid conditioner includes an active filter structured and controlled to filter one or more...
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US20120043809 |
Auxiliary Device Using Primary Inverter Feeds
An electric machine system includes an electric motor, an auxiliary device configured to receive filtered electric power, and a filter. The filter is configured to receive electric power and to...
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US20090302689 |
HARMONIC ABSORBER
This is a harmonic absorber (14) for eliminating the harmonics occurring due to unbalanced loads in a network transformer (1), a power factor correction system (6) to correct the cos φ value of ...
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US20100264750 |
HARMONIC FILTER WITH INTEGRATED POWER FACTOR CORRECTION
A distributed electrical power generating and utilizing system includes an induction generator driven by a prime mover requiring reactive power to operate for providing electrical power on a bus....
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US20090134714 |
COMPENSATION OF HARMONICS OF ELECTRICAL NETWORK
A system and a method for compensating harmonic components or a reactive power of an electrical network. The system comprises a measurement unit (1) configured to measure an electrical quantity to...
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US20110234015 |
COOLING SYSTEM AND SEVER USING SAME
A cooling system is used in a server. The server includes an uninterruptible power supply. The cooling system includes a protecting unit, a transformer unit and a alternating current powered fan....
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US20060197384 |
Dc dc switching converter device
A DC-DC switching converter device (101), in particular a quarter-brick or eighth-brick device having an industry standard pin out, comprises a pulse-width modulation circuit (132) for driving a...
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US20080211315 |
Electrical harmonic suppression system and enclosure for the same
In an electrical distribution system for supplying power from an AC source to an adjustable-speed drive connected in a single-phase manner, a device for substantially eliminating harmonic currents...
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US20100156194 |
DEVICE FOR FILTERING HARMONICS
A power device is provided for filtering or dampening harmonics and optimizing the power factor in power distributions systems. A device for a 3-phase power system comprises series inductors able...
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US20100052432 |
Method and Arrangement for Harmonic Wave Suppression in AC Voltage-Operated PTC Air Heaters
The invention is directed to a method and an arrangement for harmonic wave suppression in AC voltage-operated PTC heaters in which a harmonic component which is generated in the current of the PTC...
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US20090309425 |
ELECTROMAGNETIC NOISE SUPPRESSION SYSTEM FOR WYE POWER DISTRIBUTION
Three single-phase transformers having primary sides connected in a delta connection and the secondary sides connected in a series-delta connection. Each power line is connected through a fused...
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US20100090538 |
COMPENSATION SYSTEM FOR POWER TRANSMISSION
A system for compensating a power transmission grid is provided. The system includes one or more non-conventional power generating sources that are connected to the power transmission grid. At...
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US20120038221 |
ELECTRONIC CORRECTION UNIT
The present invention relates to a device for power factor correction and electrical wide band filtering in electrical systems for reducing considerably voltages of frequencies higher than 110 Hz...
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US20100123356 |
RESONANCE MITIGATION SYSTEM AND METHOD
A system for reducing resonance from harmonic distortion in a high voltage power system is presented. The system includes a voltage damper coupled to the high voltage power system between a cable...
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US20090021083 |
POWER GRID FILTER CHOKE
The object of the invention is to implement a circuit arrangement, which in rated operation without resonance generates as little power loss as possible, but on suitable excitation effects a...
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US20090212640 |
Device for Connection to an Impedance Having a Mainly Inductive Character
A device for connection to an impedance having a mainly inductive character. The device comprises a reactive element. Furthermore, the device is provided with inputs for inputting output signals of...
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US20100264749 |
DIFFERENTIAL ELEMENT WITH HARMONIC BLOCKING AND HARMONIC RESTRAINT OPERATING IN PARALLEL
An intelligent electronic device (IED) provides harmonic blocking and harmonic restraint differential protection operating in parallel. The IED includes a harmonically-blocked differential element...
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US20100001588 |
Multi-function three-phase active power filter
A new multi-function shunt active filter has been successfully implemented. The proposed decoupler and cascade controller provide a simple solution to power factor correction, reduction of...
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US20110148202 |
METHODS AND APPARATUS FOR POWER FACTOR CORRECTION AND REDUCTION OF DISTORTION IN AND NOISE IN A POWER SUPPLY DELIVERY NETWORK
Methods and apparatus for power factor correction include selectively coupling bit reactive loads with a load having dynamic reactive properties to dynamically correct a power factor. Methods and...
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US20080129122 |
Controllable board-spectrum harmonic filter (CBF) for electrical power systems
A broad-spectrum harmonic filter is developed. This filter is to be connected in series ahead of the load which generates harmonics. This filter basically consists of 3 fixed elements, i.e. a...
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US20090121553 |
Electronic power-saving device
A single-phase electronic power-saving device includes at least one power-saving unit. The power-saving unit includes two ceramic piece capacitors, a safe capacitor, an inductor, a SCR, a first...
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US20090243398 |
Systems and Methods for Reducing Distortion in a Power Source Using an Active Harmonics Filter
Systems and methods for reducing harmonic distortion in a power system resulting from non-linear loading on the power system. The power at an interface with a power source is measured, and then...
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US20070296277 |
EMI FILTER FOR CONTROLLING CUTOFF FREQUENCY
Disclosed relates to an electromagnetic interference (EMI) filter. Capacitance and resistance or inductance of an EMI filter, which includes a resistor and a capacitor or an inductor and a...
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US20100187914 |
METHODS AND APPARATUS FOR POWER FACTOR CORRECTION AND REDUCTION OF DISTORTION IN AND NOISE IN A POWER SUPPLY DELIVERY NETWORK
Methods and apparatus for power factor correction include selectively coupling bit reactive loads with a load having dynamic reactive properties to dynamically correct a power factor. Methods and...
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US20060261677 |
APPARATUS AND METHOD FOR DETECTING VOLTAGE OF ASSEMBLED BATTERY
An assembled battery voltage detecting apparatus includes a sampling switch section which samples a voltage of each of single batteries, capacitors charged with voltages of single batteries, a...
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US20050083627 |
Hybrid parallel active power filter for electrified railway system
An exemplary parallel hybrid power filter apparatus for the electrified railway is described. The apparatus may include a group of LC reactive filter being purely tuned, an additional inductance,...
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