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Methodology for relative location of voltage sag source using
Methodology for relative location of voltage sag source using

... and decision rules are shown in Table 2. This method provides an optimum performance when applied to records of real and synthetic voltage sags, mainly caused by network faults. The fundamental condition for its application is the existence of current measurements in the electrical system. Thus, the ...
Triangular Multicarrier SPWM Technique for Nine Level
Triangular Multicarrier SPWM Technique for Nine Level

... used is unity. For multilevel applications, carrier based PWM techniques with multiple carriers are used. The Multicarrier Modulation (MCM) techniques, can be divided in to the following categories [18] such as,  Phase disposition (PD) where all the carriers are in phase.  Inverted phase dispositi ...
Read the Paper
Read the Paper

... Abstract—The anomalous dip in scattering parameter of SiGe heterojunction bipolar transistors (HBTs) is explained quantitatively for the first time. Our results show that for SiGe HBTs, the input impedance can be represented by a “shifted” series RC circuit at low frequencies and a “shifted” parallel ...
Step-Down DC/DC Controller TLE 6389
Step-Down DC/DC Controller TLE 6389

Synchronous Machines
Synchronous Machines

MAX8896 Dual PWM Step-Down Converter in a 2mm x General Description
MAX8896 Dual PWM Step-Down Converter in a 2mm x General Description

... (typ) bypass FET to power the PA directly from the battery during high-power transmission. A second highefficiency PWM step-down converter (OUT2) supplies power directly to a high PSRR, low output noise, 200mA low-dropout linear regulator (LDO) to power the RF transceiver. Fast switching allows the ...
MAX3190/MAX3190E ±15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6 General Description
MAX3190/MAX3190E ±15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6 General Description

DXR-65 inst_1.eps
DXR-65 inst_1.eps

... accordance with the local codes. DO NOT energize the circuit at this time. (CAUTION: Insulate the unused black or red wire. Failure to do so may cause an unsafe condition.) 4. If remote fixtures are to be connected to the equipment extend the remote circuit in accordance with Article 700 and 720 of ...
Isolation Transformers Increase Safety of Electronic Systems
Isolation Transformers Increase Safety of Electronic Systems

performance analysis of multilevel inverter with spwm strategy using
performance analysis of multilevel inverter with spwm strategy using

... number of levels, using the same concept of diodeclamped voltage levels, which resulted in the current designation of a diode-clamped converter [14]. As it can be seen in Fig. 3(a), the five-level NPC inverter uses capacitors to generate an intermediate ...
Efficient Control Scheme for Five-level (NPC) Shunt Active Power
Efficient Control Scheme for Five-level (NPC) Shunt Active Power

... alternative in more power electronics application. Their advantages are robustness, not need a mathematical model and accepting non-linearity. To benefit of these advantages new simple fuzzy logic voltage controller for three-level inverter is designed. Fuzzy logic unlike Boolean or crisp logic, dea ...
AN10739 Discrete LED driver Rev. 2 — 21 June 2010 Application note
AN10739 Discrete LED driver Rev. 2 — 21 June 2010 Application note

... completeness of such information and shall have no liability for the consequences of use of such information. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business ...
MAX5920 -48V Hot-Swap Controller with External R SENSE
MAX5920 -48V Hot-Swap Controller with External R SENSE

... external MOSFET for the best thermal protection. ...
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Dual Multiplexed LVDS Repeaters (Rev. C

... its output logic state can be indeterminate when the differential input voltage is between –100 mV and 100 mV and within its recommended input common-mode voltage range. However, TI's LVDS receiver is different in how it handles the open-input circuit situation. Open-circuit means that there is litt ...
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Battery Circuit Architecture

... designs have considerable electronic content. The requirements for these batteries include high discharge rates, low insertion loss from components in series with the cells, high-precision measurements, redundant safety protection, and no upset with very high electrostatic discharge (ESD) transients ...
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How to use an aftermarket CD ignition system on the

... systems, the injection system works correctly since it will detect the presence of a single positivegoing high voltage spike once every cylinder revolution. This, however, is not the case for an aftermarket CD ignition system for at least one of two reasons: 1. Most, possibly all, aftermarket CD sys ...
SARL JEAN BUSER DISTRIBUTOR FOR PORSCHE MECHANICAL
SARL JEAN BUSER DISTRIBUTOR FOR PORSCHE MECHANICAL

... energy to allow the Perma-Tune to function. As a general rule, if there are 3 Volts available to the Perma-Tune during cranking of the engine, it will produce a spark, no matter how slow the engine is being cranked. The source of most intermittent problems are addressed in the diagnostic guide. Inte ...
TPS63020 数据资料 dataSheet 下载
TPS63020 数据资料 dataSheet 下载

... DETAILED DESCRIPTION CONTROLLER CIRCUIT The controller circuit of the device is based on an average current mode topology. The average inductor current is regulated by a fast current regulator loop which is controlled by a voltage control loop. The controller also uses input and output voltage feedf ...
MAX5058/MAX5059 Parallelable Secondary
MAX5058/MAX5059 Parallelable Secondary

Assembly Procedure SMD Attenuators
Assembly Procedure SMD Attenuators

48-V to 3.3-V Forward Converter w/Active Clamp Reset Using the
48-V to 3.3-V Forward Converter w/Active Clamp Reset Using the

... slope compensation for peak current-mode control, internal low-line voltage sensing, internal syncronizable-clock input, cycle-by-cycle current limiting, and a robust 2-A sink/source TrueDrive™ internal gate-drive circuit. The result is a highly efficient design loaded with features, requiring very ...
Multiple-Load Circuits CHAPTER 5
Multiple-Load Circuits CHAPTER 5

Traction Permanent Magnet Synchronous Motor Torque Control with
Traction Permanent Magnet Synchronous Motor Torque Control with

... has to meet special requirements typical for overhead line fed vehicles. The drives and specially their control should be robust to wide overhead line voltage tolerance (typically from -30 % to +20 %), voltage surges and input filter oscillations. These aspects may cause problems during flux weakeni ...
Ultralow IQ, 50mA LDO Linear Regulators w/Power
Ultralow IQ, 50mA LDO Linear Regulators w/Power

Micronote 126 - Lightning Protection for Aircraft per
Micronote 126 - Lightning Protection for Aircraft per

... to line for differential mode protection. With many circuits, only common mode protection on each interface is required since differential mode is provided through termination to circuit ground. TVS devices must be placed on circuit boards at the point of entry of the signals with a direct connectio ...
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Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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