High-Efficiency Negative Charge-Pump Circuit for WLED Backlights
... Abstract: Positive charge pumps, also known as inductor-less DC/DC converters, are very common in white LED drivers. They are less expensive and simpler to use, but they usually achieve a lower efficiency than inductor-based boost circuits. In this paper, we describe a novel negative charge-pump des ...
... Abstract: Positive charge pumps, also known as inductor-less DC/DC converters, are very common in white LED drivers. They are less expensive and simpler to use, but they usually achieve a lower efficiency than inductor-based boost circuits. In this paper, we describe a novel negative charge-pump des ...
Standards Project - Telecommunications Industry Association
... In the past, the unusually restrictive requirements for onhook metallic DC resistance in TIA-968 did not present much hardship for designers of terminal equipment, since the switchhook function was often a mechanical contact and there was little or no solid state circuitry in the line interface. Wit ...
... In the past, the unusually restrictive requirements for onhook metallic DC resistance in TIA-968 did not present much hardship for designers of terminal equipment, since the switchhook function was often a mechanical contact and there was little or no solid state circuitry in the line interface. Wit ...
fuzzy control of shoot through time of single stage
... energy source impose stringent requirements for the inverter topologies and controls [2]. Normally, a boost type dc to dc converter can be added to step up the voltage. Although it is a simple topology, it may not be able to produce enough voltage gain when the input is very low, even with extreme d ...
... energy source impose stringent requirements for the inverter topologies and controls [2]. Normally, a boost type dc to dc converter can be added to step up the voltage. Although it is a simple topology, it may not be able to produce enough voltage gain when the input is very low, even with extreme d ...
Lecture 27: Graph Theory in Circuit Analysis Suppose we wish to
... 1. From user input, make a connectivity matrix (graph) and record the circuit element on each edge. 2. Choose a tree using the following guidelines: a) Place an edge in the tree if it contains a voltage source, or if the voltage over the edge controls a dependent source. b) Place an edge in the co-t ...
... 1. From user input, make a connectivity matrix (graph) and record the circuit element on each edge. 2. Choose a tree using the following guidelines: a) Place an edge in the tree if it contains a voltage source, or if the voltage over the edge controls a dependent source. b) Place an edge in the co-t ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
... output current non-pulsating, hence suppressed voltage stress will come across the output capacitor [1819].Reasonably better candidate in the family of DC-DC converters, the KY-BBC is considered for this study. It converts the positive DC source voltage into positive DC load voltage with reduced out ...
... output current non-pulsating, hence suppressed voltage stress will come across the output capacitor [1819].Reasonably better candidate in the family of DC-DC converters, the KY-BBC is considered for this study. It converts the positive DC source voltage into positive DC load voltage with reduced out ...
SSR - The Inside Story
... normally powered by the ac line itself. This is accomplished by connecting the two gates of the output SCRs together, through a controlled switch. This basic control is shown in Fig 1. When S1 is closed the gates of SCR1 and SCR2 are connected, current from the ac supply flows through either R1 or R ...
... normally powered by the ac line itself. This is accomplished by connecting the two gates of the output SCRs together, through a controlled switch. This basic control is shown in Fig 1. When S1 is closed the gates of SCR1 and SCR2 are connected, current from the ac supply flows through either R1 or R ...
Class-A Trip
... The closure of the Stop valve verified by the magnitude of power output (Low forward power) being less than preset value. Most process protections and thermal protections of the Generator, GT & UT fall in this category. Class C Trip: The Turbine Generator unit is isolated from the grid by opening th ...
... The closure of the Stop valve verified by the magnitude of power output (Low forward power) being less than preset value. Most process protections and thermal protections of the Generator, GT & UT fall in this category. Class C Trip: The Turbine Generator unit is isolated from the grid by opening th ...
Power MOSFET Basics: Understanding Gate Charge and Using it to
... voltage fall time tvf was measured starting from the time current reached the peak IDS. The dip prior to current peak is the di/dt drop in the parasitic inductances of the circuit and should be excluded from the voltage fall time. Table 2 also shows the comparison between the calculations and the me ...
... voltage fall time tvf was measured starting from the time current reached the peak IDS. The dip prior to current peak is the di/dt drop in the parasitic inductances of the circuit and should be excluded from the voltage fall time. Table 2 also shows the comparison between the calculations and the me ...
iC-DL Datasheet - iC-Haus
... ever, further reflection of back travelling signals is prevented by an integrated impedance network, as shown in Figure 3. ...
... ever, further reflection of back travelling signals is prevented by an integrated impedance network, as shown in Figure 3. ...
Pre-Installation Guide
... Water treatment: Ask for detail to HANKWANG SERVICE CENTER The chiller must be located so that an adequate flow of air maintained. (4 Foot from the wall) ...
... Water treatment: Ask for detail to HANKWANG SERVICE CENTER The chiller must be located so that an adequate flow of air maintained. (4 Foot from the wall) ...
Reactive Power Optimization for Distribution System
... variables, the reactive power optimization problem in distribution power system with DGs is researched and an adaptive harmony search-particle swarm optimization (AHSPSO) algorithm is proposed. Considering economic factors, the multi-objective reactive power optimization model of distribution power ...
... variables, the reactive power optimization problem in distribution power system with DGs is researched and an adaptive harmony search-particle swarm optimization (AHSPSO) algorithm is proposed. Considering economic factors, the multi-objective reactive power optimization model of distribution power ...
Enhanced laser shutter - Optical Physics Group
... failed disk drives, the electronics to drive the coil can be problematic. Our original circuit used discrete components to switch a unipolar power supply one way through the actuator coil to close the shutter, and in the reverse direction to open it, depending on a digital input signal. To increase ...
... failed disk drives, the electronics to drive the coil can be problematic. Our original circuit used discrete components to switch a unipolar power supply one way through the actuator coil to close the shutter, and in the reverse direction to open it, depending on a digital input signal. To increase ...
Electromagnetic Transients Simulation Models for Accurate
... device model which only makes minor dynamic updates to the parameters within the host emtp program. The losses in the device are estimated by observation of the pre- and postswitching currents and voltages using the algorithm described below. These losses become the inputs to a dynamic model of the ...
... device model which only makes minor dynamic updates to the parameters within the host emtp program. The losses in the device are estimated by observation of the pre- and postswitching currents and voltages using the algorithm described below. These losses become the inputs to a dynamic model of the ...
Electrical substation
A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels.Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control.A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection of two different transmission voltages. The word substation comes from the days before the distribution system became a grid. As central generation stations became larger, smaller generating plants were converted to distribution stations, receiving their energy supply from a larger plant instead of using their own generators. The first substations were connected to only one power station, where the generators were housed, and were subsidiaries of that power station.