R.P. Pilawa-Podgurski, W. Li, I. Celanovic and D.J. Perreault, “Integrated CMOS Energy Harvesting Converter with Digital Maximum Power Point Tracking for a Portable Thermophotovoltaic Power Generator,” IEEE Journal of Emerging and Selected Topics in Power Electronics , Vol. 3, No. 4, pp. 1021-1035, August 2015.
... the cells during low light conditions. This approach, while simple, is typically very inefficient. Ignoring the small voltage drop across the diode, the string voltage Vstring is restricted to be equal to the battery voltage Vout at all times, which is typically not the same as the MPP voltage (VMP ...
... the cells during low light conditions. This approach, while simple, is typically very inefficient. Ignoring the small voltage drop across the diode, the string voltage Vstring is restricted to be equal to the battery voltage Vout at all times, which is typically not the same as the MPP voltage (VMP ...
International Journal of Advance Engineering and
... loss, enhance the voltage profile, improve the overall system stability, etc. It is necessary to place the capacitor in right location with optimal size to ensure the maximum benefits of the system. A new method of finding the optimal location was proposed and the optimal size was determined by usin ...
... loss, enhance the voltage profile, improve the overall system stability, etc. It is necessary to place the capacitor in right location with optimal size to ensure the maximum benefits of the system. A new method of finding the optimal location was proposed and the optimal size was determined by usin ...
Bulletin CW-E Clamp-on Power Meters CW120,CW121,CW240
... Measurement of Instantaneous Value: For investigation of power consumption, maximum load factor and peak current The CW240 can be used to carry out investigation regarding renewal of electric equipment such as transformers in building, check load factors and demand factors, and to check current/volt ...
... Measurement of Instantaneous Value: For investigation of power consumption, maximum load factor and peak current The CW240 can be used to carry out investigation regarding renewal of electric equipment such as transformers in building, check load factors and demand factors, and to check current/volt ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... and (mq1vdc1 − mq2vdc2). However, modulating waveforms for individual VSCs md1, md2, mq1, and mq2 have to be derived from these LV voltages. This distribution is used to regulate real power exchange between the two VSCs, as given in Section IV-C. Furthermore, the current controller requires the refe ...
... and (mq1vdc1 − mq2vdc2). However, modulating waveforms for individual VSCs md1, md2, mq1, and mq2 have to be derived from these LV voltages. This distribution is used to regulate real power exchange between the two VSCs, as given in Section IV-C. Furthermore, the current controller requires the refe ...
P.A. Godoy, D.J. Perreault, and J.L. Dawson, Outphasing Energy Recovery Amplifier with Resistance Compression for Improved Efficiency, Transactions on Microwave Theory and Techniques, Vol. 57, No. 12, pp. 2895-2906, Dec. 2009.
... power should provide a constant resistive impedance at its input. A purely resistive input impedance can be achieved with a variety of rectifier structures. One example of this kind of rectifier is an ideal half bridge rectifier driven by a sinusoidal current source of amplitude and frequency , and ...
... power should provide a constant resistive impedance at its input. A purely resistive input impedance can be achieved with a variety of rectifier structures. One example of this kind of rectifier is an ideal half bridge rectifier driven by a sinusoidal current source of amplitude and frequency , and ...
Crown FM4000 Manual
... The FM4000 is a highly efficient transmitter package designed to set a new standard in FM transmitter design offering modularity, ease of use, and long-term reliability. The FM4000 package includes two (2) PA2000 amplifiers, two (2) PS2000 power supplies, a combiner with coupler, a transmitter contr ...
... The FM4000 is a highly efficient transmitter package designed to set a new standard in FM transmitter design offering modularity, ease of use, and long-term reliability. The FM4000 package includes two (2) PA2000 amplifiers, two (2) PS2000 power supplies, a combiner with coupler, a transmitter contr ...
Latest Technology PT IGBTs vs. Power MOSFETs
... little, if any sacrifice in efficiency. This paper gives an overview of PT IGBT technology, compares features and benefits with power MOSFETs, and shows performance improvements in various high frequency, high voltage SMPS applications. ...
... little, if any sacrifice in efficiency. This paper gives an overview of PT IGBT technology, compares features and benefits with power MOSFETs, and shows performance improvements in various high frequency, high voltage SMPS applications. ...
2 Principles of Electrical Power Control
... an apparent power S greater than its active power [2]. This question is closely related to the need for interpretation of power phenomena in electric circuits. Another factor is of a practical nature – power theory attempts to answer the question how the apparent power of the source can be reduced w ...
... an apparent power S greater than its active power [2]. This question is closely related to the need for interpretation of power phenomena in electric circuits. Another factor is of a practical nature – power theory attempts to answer the question how the apparent power of the source can be reduced w ...
Principles of Electrical Power Control
... an apparent power S greater than its active power [2]. This question is closely related to the need for interpretation of power phenomena in electric circuits. Another factor is of a practical nature – power theory attempts to answer the question how the apparent power of the source can be reduced w ...
... an apparent power S greater than its active power [2]. This question is closely related to the need for interpretation of power phenomena in electric circuits. Another factor is of a practical nature – power theory attempts to answer the question how the apparent power of the source can be reduced w ...
Interharmonics: Theory and Modeling
... spectra of an ac and a dc arc furnace are shown in Fig. 7. 4) Wind Turbines: Regarding power generation, wind turbines may play an important role for producing voltage interharmonics. In this case, the origin of interharmonics is essentially mechanical. In particular, during the continuous operation ...
... spectra of an ac and a dc arc furnace are shown in Fig. 7. 4) Wind Turbines: Regarding power generation, wind turbines may play an important role for producing voltage interharmonics. In this case, the origin of interharmonics is essentially mechanical. In particular, during the continuous operation ...
Compendium of articles by Magma Design Automation
... memory footprint that contributes to area and power reduction. The ability to turn off processors with power gating depending on the workload requirement, and voltage and frequency scaling also enable significant power savings. Multicore processors thus offer excellent scalability of performance an ...
... memory footprint that contributes to area and power reduction. The ability to turn off processors with power gating depending on the workload requirement, and voltage and frequency scaling also enable significant power savings. Multicore processors thus offer excellent scalability of performance an ...
High Voltage Power Supplies
... both power supplies enables sensitive measurement instruments to make accurate current measurements down to picoamp levels. Protecting User and Instrumentation Series 2290 Power Supplies and a Model 2290PM-200 Protection Module protect both user and instrumentation from hazardous voltages. An interl ...
... both power supplies enables sensitive measurement instruments to make accurate current measurements down to picoamp levels. Protecting User and Instrumentation Series 2290 Power Supplies and a Model 2290PM-200 Protection Module protect both user and instrumentation from hazardous voltages. An interl ...
DC to AC Power inverter manual
... incorporates a higher quality power supply. b. Television interference: Operation of the power inverter can interfere with television reception on some channels. If this situation occurs, the following steps may help to alleviate the problem. -Make sure that the chassis ground lug on the back of the ...
... incorporates a higher quality power supply. b. Television interference: Operation of the power inverter can interfere with television reception on some channels. If this situation occurs, the following steps may help to alleviate the problem. -Make sure that the chassis ground lug on the back of the ...
Aalborg Universitet Modular Plug’n’Play Control Architectures for Three-phase Inverters in UPS Applications
... to achieve the proposed control. Moreover, regarding reactive power sharing issues, each DC/AC individual reactive power is calculated each phase respectively in order to modify phase angle of its own output, which is called “phase-equal loop”. Consequently, UPS systems output voltage will have volt ...
... to achieve the proposed control. Moreover, regarding reactive power sharing issues, each DC/AC individual reactive power is calculated each phase respectively in order to modify phase angle of its own output, which is called “phase-equal loop”. Consequently, UPS systems output voltage will have volt ...
A/V Power Mgmt - Which Devices To Buy
... An example of a performance related might be a high-end power line conditioner with precise sine wave generation capabilities, for example. Here are six recommendations we suggest regardless of the type or brand of power management device you look at. ...
... An example of a performance related might be a high-end power line conditioner with precise sine wave generation capabilities, for example. Here are six recommendations we suggest regardless of the type or brand of power management device you look at. ...
Aalborg Universitet Smart Metering System for Microgrids
... usually slow, 5 to 15 minutes, to be integrated into the primary or secondary control. However, they can be employed in a higher level for matching production and demand in the Microgrid network. Thus, it is in the so-called tertiary control level of the Microgrid where the Smart Meters can provide ...
... usually slow, 5 to 15 minutes, to be integrated into the primary or secondary control. However, they can be employed in a higher level for matching production and demand in the Microgrid network. Thus, it is in the so-called tertiary control level of the Microgrid where the Smart Meters can provide ...
DI23661665
... the power conversion amongst higher-voltage lowerfrequency and lower-voltage higher-frequency inverters. Considering the cascaded inverter to be one unit, it can be seen that a higher number of voltage levels are available for a given number of semiconductor devices. The simplified multilevel invert ...
... the power conversion amongst higher-voltage lowerfrequency and lower-voltage higher-frequency inverters. Considering the cascaded inverter to be one unit, it can be seen that a higher number of voltage levels are available for a given number of semiconductor devices. The simplified multilevel invert ...
5MS/s Power Analyzer
... Note 1: The apparent power (S), reactive power (Q), power factor (λ), and phase angle (φ) for the PZ4000 are calculated based on voltage, current, and active power. (However, reactive power is measured directly during harmonic measurement.) Therefore, during distorted wave input, there may be a diff ...
... Note 1: The apparent power (S), reactive power (Q), power factor (λ), and phase angle (φ) for the PZ4000 are calculated based on voltage, current, and active power. (However, reactive power is measured directly during harmonic measurement.) Therefore, during distorted wave input, there may be a diff ...
thiet ke web
... should understand in his (or her) sleep. Because if he doesn’t, he is bound to be at a disadvantage in his work. When these terms come up in discussions with customers or colleagues, he will have trouble focusing on the real issue if he is busy wondering whether 3 dB means a factor of 2 or 4 (or som ...
... should understand in his (or her) sleep. Because if he doesn’t, he is bound to be at a disadvantage in his work. When these terms come up in discussions with customers or colleagues, he will have trouble focusing on the real issue if he is busy wondering whether 3 dB means a factor of 2 or 4 (or som ...
Three-Phase High-Power and Zero-Current-Switching OBC
... Due to the environmental and energy crises, more and more researchers are paying attention to novel energy vehicles, such as electric vehicles (EVs) and hybrid electric vehicles (HEVs). It is widely known that battery chargers play a critical role in the development of EVs, and the charging time and ...
... Due to the environmental and energy crises, more and more researchers are paying attention to novel energy vehicles, such as electric vehicles (EVs) and hybrid electric vehicles (HEVs). It is widely known that battery chargers play a critical role in the development of EVs, and the charging time and ...
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.