switching frequency effects and efficiency analysis of quadratic buck
... Generally, the source to power the laptop is either a battery or an AC adapter. The existing non-isolated dcdc converters like buck, multi-phase non-coupled and coupled buck [3-12] are unsuitable for large input voltage reduction (19V-1V) because of minimum turnon time requirement of the switch. Thi ...
... Generally, the source to power the laptop is either a battery or an AC adapter. The existing non-isolated dcdc converters like buck, multi-phase non-coupled and coupled buck [3-12] are unsuitable for large input voltage reduction (19V-1V) because of minimum turnon time requirement of the switch. Thi ...
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... Fig. 2. Two main grid-connected transformerless PV systems with LCLfilter (SD-IGBT module, S-IGBT, D-Diode). ...
... Fig. 2. Two main grid-connected transformerless PV systems with LCLfilter (SD-IGBT module, S-IGBT, D-Diode). ...
Three-Phase Power Quality Analyzer PowerPad Model 3945-B
... • Easy-to-use on-screen setup • Automatic current probe recognition and scaling • True RMS voltage and current measurement • Measures DC volts, amps and power • Display and capture voltage, current and power harmonics to 50th order, including direction, in real time • Capture transients down to 1/25 ...
... • Easy-to-use on-screen setup • Automatic current probe recognition and scaling • True RMS voltage and current measurement • Measures DC volts, amps and power • Display and capture voltage, current and power harmonics to 50th order, including direction, in real time • Capture transients down to 1/25 ...
Versatile Unified Power Quality Conditioner
... results, in which the well-known strategy based on the p-q theory [33] was used to obtain the compensation references of voltages and currents. Besides the experimental results used to evaluate the static and dynamic performance, as well as the effectiveness of the UPQC topology, this paper aims to ...
... results, in which the well-known strategy based on the p-q theory [33] was used to obtain the compensation references of voltages and currents. Besides the experimental results used to evaluate the static and dynamic performance, as well as the effectiveness of the UPQC topology, this paper aims to ...
An RF–DC Converter with Wide Dynamic Range Input Matching For
... impedance as a function of input power. Class-E power amplifiers achieve significantly higher efficiency than conventional Class-B or –C amplifiers. In Class-E,the transistor operates as an on/off switch and the load network shapesthe voltage and current waveformsto prevent simultaneoushigh voltage ...
... impedance as a function of input power. Class-E power amplifiers achieve significantly higher efficiency than conventional Class-B or –C amplifiers. In Class-E,the transistor operates as an on/off switch and the load network shapesthe voltage and current waveformsto prevent simultaneoushigh voltage ...
AT89C5131 Hardware User Guide
... n Care must be taken on the routage of the power supply (star routage, local ground copper area...) n The filter tantalum capacitors must have a low ESR. n The Voltage Regulator must be placed on the component side and above a copper pad linked VDD.Decoupling ...
... n Care must be taken on the routage of the power supply (star routage, local ground copper area...) n The filter tantalum capacitors must have a low ESR. n The Voltage Regulator must be placed on the component side and above a copper pad linked VDD.Decoupling ...
LTC1957-1/LTC1957-2 - Single/Dual Band RF Power Controllers with 40dB Dynamic Range.
... Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC1957-1 and LTC1957-2 are guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the – 30°C to 85°C operating temperature range are assured by design, chara ...
... Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC1957-1 and LTC1957-2 are guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the – 30°C to 85°C operating temperature range are assured by design, chara ...
x8407_projects
... Rated Inverter Output Voltage: 6.6KV (rms fundamental line-to-line voltage) Rated Inverter Output Power: 5MVA (three-phase) Rated Inverter Output Frequency: 60Hz dc link voltage: Constant, ripple free. Total dc link voltage: To be determined. Use two identical dc voltage sources for the three-level ...
... Rated Inverter Output Voltage: 6.6KV (rms fundamental line-to-line voltage) Rated Inverter Output Power: 5MVA (three-phase) Rated Inverter Output Frequency: 60Hz dc link voltage: Constant, ripple free. Total dc link voltage: To be determined. Use two identical dc voltage sources for the three-level ...
GNS ESI RF2174
... Theory of Operation and Application Information The RF2174 is a three-stage device with 28 dB gain at full power. Therefore, the drive required to fully saturate the output is +5dBm. Based upon HBT (Heterojunction Bipolar Transistor) technology, the part requires only a single positive 3V supply to ...
... Theory of Operation and Application Information The RF2174 is a three-stage device with 28 dB gain at full power. Therefore, the drive required to fully saturate the output is +5dBm. Based upon HBT (Heterojunction Bipolar Transistor) technology, the part requires only a single positive 3V supply to ...
Specification Number: 26 05 73.10
... 2. The type and level of compensation needed to achieve the desired power factor and acceptable levels of harmonics shall be considered. 3. Transient concerns shall be evaluated in order to determine the optimum equipment size, location in the system, and configuration. 4. The study shall make appro ...
... 2. The type and level of compensation needed to achieve the desired power factor and acceptable levels of harmonics shall be considered. 3. Transient concerns shall be evaluated in order to determine the optimum equipment size, location in the system, and configuration. 4. The study shall make appro ...
VLSI Iterative Decoder Design
... Objective and Background of the Presentation CMOS Power Dissipation CMOS Device Characteristics CMOS Current Mirror Design of Level Shifter through Mirror Circuit Circuit Simulation Delay and Power Analysis Leakage Analysis Comparison Analysis Summary and Discussion ...
... Objective and Background of the Presentation CMOS Power Dissipation CMOS Device Characteristics CMOS Current Mirror Design of Level Shifter through Mirror Circuit Circuit Simulation Delay and Power Analysis Leakage Analysis Comparison Analysis Summary and Discussion ...
LTC1758-1/LTC1758-2 - RF Power Controllers with 250kHz Control Loop Bandwidth and 40dB Dynamic Range.
... wide range of input power. The Schottky detector is biased at about 60µA and drives an on-chip peak detector capacitor of 28pF. ...
... wide range of input power. The Schottky detector is biased at about 60µA and drives an on-chip peak detector capacitor of 28pF. ...
bi-dirctional three-level front- end converter for
... in fig. 5 (b). The sector change logic automatically adjusts time need for each sector to satisfy the load demands, as shown in fig. 5 (c), sector change pattern is differ in terms of time spent by reference voltage vector in each sector during the sag and swell at grid side. During the sag and swel ...
... in fig. 5 (b). The sector change logic automatically adjusts time need for each sector to satisfy the load demands, as shown in fig. 5 (c), sector change pattern is differ in terms of time spent by reference voltage vector in each sector during the sag and swell at grid side. During the sag and swel ...
1 Purpose and scope 2 Power supply systems
... e) Under normal maintenance work the contact line system may be without power feeding for hours (even days). f) Under emergency condition with portioned delivery of primary energy an UPS facility may get short of stored energy. When such conditions arise, other countermeasures should be evaluated. ...
... e) Under normal maintenance work the contact line system may be without power feeding for hours (even days). f) Under emergency condition with portioned delivery of primary energy an UPS facility may get short of stored energy. When such conditions arise, other countermeasures should be evaluated. ...
Advanced vector control for voltage source
... control is lost (P≈[-0.51..-1]). In particular when the system is operating near P = -1 pu (inverting mode), the effect of i∗cd or i∗cq changes on the power and voltage are almost identical. In other words, when a VSC-HVDC is connected to a weak grid there exists system non-linearities that do not p ...
... control is lost (P≈[-0.51..-1]). In particular when the system is operating near P = -1 pu (inverting mode), the effect of i∗cd or i∗cq changes on the power and voltage are almost identical. In other words, when a VSC-HVDC is connected to a weak grid there exists system non-linearities that do not p ...
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.