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Implementation of Artificial Intelligence Technique to Model Arc
Implementation of Artificial Intelligence Technique to Model Arc

... an arc furnace. Considering the non-linear relationship between the arc voltage and the arc current and lack of knowledge associated with the process dynamics, artificial intelligence (AI) techniques can be applied to extract nonlinear relationships between the input and the output pattern of arc fu ...
ARCAT spec 262600 2009-9-15
ARCAT spec 262600 2009-9-15

... b) The user against personal contact with energized circuits. 2. When installed within a substation or switchgear lineup, the power quality meter shall be mounted within a low-voltage cubicle, isolated from medium and high-voltage circuits. 3. The power quality meter shall be designed to operate in: ...
Power-Synchronization Control of Grid-Connected Voltage
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... interconnecting network. Generally, this current is unknown. If power-synchronization should be used to control a VSC, therefore, it cannot be combined with a vector-current controller, which requires a known current reference. As will be shown below, the active power output from the VSC is instead ...
www.editech.co.kr
www.editech.co.kr

... Application_ Thermal scope is an equipment to detect infrared rays emitted from an object without contacting and display in pictorial image by dividing the color of each temperature. It is used as the best method in diagnosing overheating state of the object in the filed of accident prevention and m ...
When the output voltage increases
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... The series element controls the amount of the input voltage that gets to the output. If the output voltage increases (or decreases), the comparator circuit provides a control signal to cause the series control element to decrease (or increase) the amount of the output voltage. ...
AND8125/D Evaluating the Power Capability of NCP101X
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... handled by each device and offers an overview of each part capability. Each reference is affected by a key parameter that needs to be accounted for at the very beginning like the switching frequency, the maximum peak current and the Rds(ON). Among these parameters, we also find another set of constr ...
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Analysis of the Effect of Harmonics Due To Switching Devices WRT
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... or voltage stresses [4]. In addition, the harmonic currents produced by non-linear loads can interact adversely with a wide range of power system equipment, most notably capacitors, transformers, and motors, causing additional losses, overheating, and overloading. These harmonic currents can also ca ...
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Anatomy of Switching Power Supplies

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... no protection ( temperature or current ) is active during this mode. The designer must check such that in the worst condition of current and temperature, the power dissipated during the turn off is within the SOA of the IPS. Purpose of the active clamp When switched OFF, an inductive load generates ...
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Efficient Control Scheme for Five-level (NPC) Shunt Active Power
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Non-insulated SCR / Triac control circuits

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TOP221 - Power Integrations
TOP221 - Power Integrations

... CONTROL pin voltage VC is the supply or bias voltage for the controller and driver circuitry. An external bypass capacitor closely connected between the CONTROL and SOURCE pins is required to supply the gate drive current. The total amount of capacitance connected to this pin (CT) also sets the auto ...
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DC bus voltage control for a distributed power system

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... Sense Resistors and the Power Margin Two resistors (6.8Ω, and 6.8Ω, respectively) are placed in parallel to produce the required sense resistor value and still have enough power margin. Ramp-up voltage (via R7 x Ippk), when added to the DC voltage [(I1+Ie)(R7+R 9)] achieves good output voltage and c ...
Aalborg Universitet
Aalborg Universitet

... frequency and output voltage amplitude at no-load condition; mi and ni are the droop gain of frequency and voltage of DG-i unit; Gn is the voltage recovery operation signal at the n-th synchronization interval, Gn has two possible values: 1 or 0. If Gn=1, it means the voltage recovery operation is p ...
Optimizing Power and Performance in Stratix V
Optimizing Power and Performance in Stratix V

... Ideal choice for high-end FPGAs used in high-bandwidth systems  Delivers 35% higher performance than alternative process options  Enables fastest and most power-efficient transceivers Process Techniques on 28HP ...
Linearity and Efficiency Enhancement Strategies for 4G Wireless Power Amplifier Designs
Linearity and Efficiency Enhancement Strategies for 4G Wireless Power Amplifier Designs

... for wideband OFDM modulation. In many cases, these converters can be integrated along with the power amplifier to realize a completely monolithic solution (except for the external inductor). A recent example of a monolithic SiGe BiCMOS envelope-tracking power amplifier (PA) for 802.11g OFDM applicatio ...
Power Demand and Energy Usage of Container Crane
Power Demand and Energy Usage of Container Crane

... To make a true comparison between AC and DC quay cranes, the electrical conditions have to be the same. It is assumed that the issue of poor power factor of DC drive quay crane has been solved (in the later section), comparison is now based on the peak kW demand rather than the peak kVA demand. As s ...
LM4804 Low Voltage High Power Audio Power Amplifier (Rev. C)
LM4804 Low Voltage High Power Audio Power Amplifier (Rev. C)

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Power factor



In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless number in the closed interval of -1 to 1. A power factor of less than one means that the voltage and current waveforms are not in phase, reducing the instantaneous product of the two waveforms (V x I). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a non-linear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power. A negative power factor occurs when the device (which is normally the load) generates power, which then flows back towards the source, which is normally considered the generator.In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment. Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.Linear loads with low power factor (such as induction motors) can be corrected with a passive network of capacitors or inductors. Non-linear loads, such as rectifiers, distort the current drawn from the system. In such cases, active or passive power factor correction may be used to counteract the distortion and raise the power factor. The devices for correction of the power factor may be at a central substation, spread out over a distribution system, or built into power-consuming equipment.
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