Improved power quality and productivity in an iron ore mine by
... In the underground mine of LKAB, iron ore is brought to the surface by a total of seven mine hoists, each driven by a 4.3 MW thyristor equipped 6-pulse DC drive and representing a fast varying load affecting the whole supply system. The load cycle consists of 3 different phases: acceleration, full s ...
... In the underground mine of LKAB, iron ore is brought to the surface by a total of seven mine hoists, each driven by a 4.3 MW thyristor equipped 6-pulse DC drive and representing a fast varying load affecting the whole supply system. The load cycle consists of 3 different phases: acceleration, full s ...
Acumentrics Rugged-UPS™ Design Details
... demand a high amount of current for a few milliseconds during the positive and negative portion of the cycle. This Peak-to-RMS current ratio is termed the Crest Factor. The inverter section of a UPS must be able to handle this high crest factor or the output voltage will result in fault-topping, cre ...
... demand a high amount of current for a few milliseconds during the positive and negative portion of the cycle. This Peak-to-RMS current ratio is termed the Crest Factor. The inverter section of a UPS must be able to handle this high crest factor or the output voltage will result in fault-topping, cre ...
ch7.4_designandappli..
... %displays current as function of roots in characteristic equation % il(t)=(60/(s2-s1))*(exp(-s1*t)-exp(s2*t)); % with restriction s1+s2=20, s1~=s2. t=linspace(0,5,500)'; %set display interval as a column vector ils=[]; %reserve space to store curves for s1=1:19 s2=20-s1; if s1~=s2 il=(60/(s2-s1))*(e ...
... %displays current as function of roots in characteristic equation % il(t)=(60/(s2-s1))*(exp(-s1*t)-exp(s2*t)); % with restriction s1+s2=20, s1~=s2. t=linspace(0,5,500)'; %set display interval as a column vector ils=[]; %reserve space to store curves for s1=1:19 s2=20-s1; if s1~=s2 il=(60/(s2-s1))*(e ...
FDC638P P-Channel 2.5V PowerTrench Specified MOSFET September 2001
... support device or system whose failure to perform can the body, or (b) support or sustain life, or (c) whose be reasonably expected to cause the failure of the life failure to perform when properly used in accordance support device or system, or to affect its safety or with instructions for use prov ...
... support device or system whose failure to perform can the body, or (b) support or sustain life, or (c) whose be reasonably expected to cause the failure of the life failure to perform when properly used in accordance support device or system, or to affect its safety or with instructions for use prov ...
Evaluates: MAX1744/MAX1745 MAX1744 Evaluation Kit General Description Features
... To generate output voltages other than 3.3V or 5V, replace the MAX1744 with the MAX1745 (adjustable output), and select the external voltage-divider resistors, R2 and R3. The MAX1745 allows the output voltage to be set from 1.25V to 18V. The only other modification required is to remove the shunt fr ...
... To generate output voltages other than 3.3V or 5V, replace the MAX1744 with the MAX1745 (adjustable output), and select the external voltage-divider resistors, R2 and R3. The MAX1745 allows the output voltage to be set from 1.25V to 18V. The only other modification required is to remove the shunt fr ...
Cable current transformers - PFIFFNER Instrument Transformers Ltd
... transform currents up to 5000 A into standardised values for meters, measuring and protection devices. Bar current transformers are typically used in wall, floor or ceiling openings. They consist mainly of a wall bushing and the coupled current transformer part. The wall bushing provides the insulat ...
... transform currents up to 5000 A into standardised values for meters, measuring and protection devices. Bar current transformers are typically used in wall, floor or ceiling openings. They consist mainly of a wall bushing and the coupled current transformer part. The wall bushing provides the insulat ...
No Slide Title
... %displays current as function of roots in characteristic equation % il(t)=(60/(s2-s1))*(exp(-s1*t)-exp(s2*t)); % with restriction s1+s2=20, s1~=s2. t=linspace(0,5,500)'; %set display interval as a column vector ils=[]; %reserve space to store curves for s1=1:19 s2=20-s1; if s1~=s2 il=(60/(s2-s1))*(e ...
... %displays current as function of roots in characteristic equation % il(t)=(60/(s2-s1))*(exp(-s1*t)-exp(s2*t)); % with restriction s1+s2=20, s1~=s2. t=linspace(0,5,500)'; %set display interval as a column vector ils=[]; %reserve space to store curves for s1=1:19 s2=20-s1; if s1~=s2 il=(60/(s2-s1))*(e ...
Aalborg Universitet Permanent Magnet Synchronous Motors
... corresponding incremental inductance can then be calculated based on the circuit impedance, which may be simply calculated from the measured terminal voltage, and line current. But the problem here is that due to the magnetic saturation caused by magnets and d, q currents, the d, q-axes inductances ...
... corresponding incremental inductance can then be calculated based on the circuit impedance, which may be simply calculated from the measured terminal voltage, and line current. But the problem here is that due to the magnetic saturation caused by magnets and d, q currents, the d, q-axes inductances ...
DK36667674
... In this paper “Mitigate voltage sag/swell condition and power quality improvement in distribution line using DSTATCOM”. In power quality problems accurse many types of disturbance in voltage, current or frequency failure in distribution networks, sensitive industrial loads. This paper shows the tech ...
... In this paper “Mitigate voltage sag/swell condition and power quality improvement in distribution line using DSTATCOM”. In power quality problems accurse many types of disturbance in voltage, current or frequency failure in distribution networks, sensitive industrial loads. This paper shows the tech ...
Lec 2014 10 07
... coordinates x and y. This is done using LiftModeTM. The field due to trapped charges—on or beneath the sample surface—is often sufficiently large to generate contrast in an EFM image. Otherwise, a field can be induced by applying a voltage between the tip and the sample. The voltage may be applied d ...
... coordinates x and y. This is done using LiftModeTM. The field due to trapped charges—on or beneath the sample surface—is often sufficiently large to generate contrast in an EFM image. Otherwise, a field can be induced by applying a voltage between the tip and the sample. The voltage may be applied d ...
Fuses - R Rated
... currents below the minimum interrupting rating of the fuse. Since multiple devices are used to provide protection it is very important that they be properly coordinated. The motor starter manufacturer typically chooses the proper fuse R-rating, overload relay, and contactor. The following guideline ...
... currents below the minimum interrupting rating of the fuse. Since multiple devices are used to provide protection it is very important that they be properly coordinated. The motor starter manufacturer typically chooses the proper fuse R-rating, overload relay, and contactor. The following guideline ...
single-phase bridge rectifiers with voltage filters
... The line-commutated rectifiers provided with voltage filters have different operating features compared with the same rectifier topologies provided with current filters, even if the rectifier is uncontrolled (made with diodes) or phase-controlled (made with thyristors). For this reason it is necessa ...
... The line-commutated rectifiers provided with voltage filters have different operating features compared with the same rectifier topologies provided with current filters, even if the rectifier is uncontrolled (made with diodes) or phase-controlled (made with thyristors). For this reason it is necessa ...
Transformer Basics
... At operating voltages above 230kv switching transients become the constraint that drives system design ...
... At operating voltages above 230kv switching transients become the constraint that drives system design ...
HF2312301235
... inductors or series-resonance circuits are adopted to transfer energy between unbalanced capacitors [10], [11]. By auxiliary circuits, the transferred current or power can be controlled accurately, but the additional feedback control strategies are also needed, so the control of these converters bec ...
... inductors or series-resonance circuits are adopted to transfer energy between unbalanced capacitors [10], [11]. By auxiliary circuits, the transferred current or power can be controlled accurately, but the additional feedback control strategies are also needed, so the control of these converters bec ...
Three-phase electric power
Three-phase electric power is a common method of alternating-current electric power generation, transmission, and distribution. It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power. It is also used to power large motors and other heavy loads. A three-phase system is usually more economical than an equivalent single-phase or two-phase system at the same line to ground voltage because it uses less conductor material to transmit electrical power.The three-phase system was independently invented by Galileo Ferraris, Mikhail Dolivo-Dobrovolsky, Jonas Wenström and Nikola Tesla in the late 1880s.