IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... may pose a threat to network in terms of stability, voltage regulation and power-quality (PQ) issues. Therefore, the DG systems are required to comply with strict technical and regulatory frameworks to ensure safe, reliable and efficient operation of overall network. With the advancement in power el ...
... may pose a threat to network in terms of stability, voltage regulation and power-quality (PQ) issues. Therefore, the DG systems are required to comply with strict technical and regulatory frameworks to ensure safe, reliable and efficient operation of overall network. With the advancement in power el ...
投影片 1 - stust.edu.tw
... stage to achieve voltage regulation function, and is hardly used to less that half of the full range due to the required gas breakdown voltage level The PWM control can fulfill the full load range conditions. However, a small pulse width tends to a discontinuous load current or leading load current ...
... stage to achieve voltage regulation function, and is hardly used to less that half of the full range due to the required gas breakdown voltage level The PWM control can fulfill the full load range conditions. However, a small pulse width tends to a discontinuous load current or leading load current ...
KD3418211827
... system design. This work proposes a single phase to three phase drive system composed of two parallel single phase rectifiers, an induction motor and three phase inverter. The proposed system permits to reduce the rectifier switch currents, the total harmonic distortion (THD) of the grid current wit ...
... system design. This work proposes a single phase to three phase drive system composed of two parallel single phase rectifiers, an induction motor and three phase inverter. The proposed system permits to reduce the rectifier switch currents, the total harmonic distortion (THD) of the grid current wit ...
A 25 GHz Quadrature Voltage Controlled Ring Oscillator in 0.12 µ
... transistors to go into breakdown due to the low impedance seen by the base of Q1 and Q2. Simulations show that the collector-emitter voltage is approximately 2 V at the highest bias current. The differential voltage swing is 1 V. The transistors Q1 and Q2 are sized and biased to maintain a high fT a ...
... transistors to go into breakdown due to the low impedance seen by the base of Q1 and Q2. Simulations show that the collector-emitter voltage is approximately 2 V at the highest bias current. The differential voltage swing is 1 V. The transistors Q1 and Q2 are sized and biased to maintain a high fT a ...
Generadores Indar
... Components and the different parts of the generator are checked and tested throughout the manufacturing process. The controls include: Quality control, test to ensure insulation, inspection on reception of products, etc. These ongoing checks during the manufacturing process and the final tests guara ...
... Components and the different parts of the generator are checked and tested throughout the manufacturing process. The controls include: Quality control, test to ensure insulation, inspection on reception of products, etc. These ongoing checks during the manufacturing process and the final tests guara ...
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... 10 Ω 100 nF 3.3 kW 230 V rms 50 Hz 6 kHz 600 V ...
... 10 Ω 100 nF 3.3 kW 230 V rms 50 Hz 6 kHz 600 V ...
Study of Very Fast Transients in Power Transformers
... JWGA2/C4.39. This coefficient, unlike other factors such as the Frequency Domain Severity Factor (FDSF), is a more sensitive factor, which allows to locate dielectrically weak points along the windings. It also could help a better understanding between manufacturers and users of the transformer. Thi ...
... JWGA2/C4.39. This coefficient, unlike other factors such as the Frequency Domain Severity Factor (FDSF), is a more sensitive factor, which allows to locate dielectrically weak points along the windings. It also could help a better understanding between manufacturers and users of the transformer. Thi ...
Application Note #140 PeakForce Kelvin Probe Force
... equals the CPD. The various Kelvin probe techniques developed thus far differ mainly only on how this chargefree state is detected. In 1932, William Zisman of Harvard University introduced the vibrating electrode technique and the “nulling” concept.5 Vertically vibrating the tip over a sample causes ...
... equals the CPD. The various Kelvin probe techniques developed thus far differ mainly only on how this chargefree state is detected. In 1932, William Zisman of Harvard University introduced the vibrating electrode technique and the “nulling” concept.5 Vertically vibrating the tip over a sample causes ...
Guitar Pickup Theory
... Another cable, another sound! This is a shame but it is true. You can easily check it up. A few pickup manufacturers know that fact but they conceal it. The majority seems to be totally ignorant. The influence of eddy currents As mentioned earlier, this overview has been simplified to make it easier ...
... Another cable, another sound! This is a shame but it is true. You can easily check it up. A few pickup manufacturers know that fact but they conceal it. The majority seems to be totally ignorant. The influence of eddy currents As mentioned earlier, this overview has been simplified to make it easier ...
Design and Evaluation of a Modular Resonant Switched
... extracted from the chain [1, 2]. Two groups of solutions have been proposed to remedy the shading problem: solutions that are based on a dedicated converter/inverter per panel [3-4] and those that keep the series connection of the panels, but replenish the lower current of the shaded panel(s) with p ...
... extracted from the chain [1, 2]. Two groups of solutions have been proposed to remedy the shading problem: solutions that are based on a dedicated converter/inverter per panel [3-4] and those that keep the series connection of the panels, but replenish the lower current of the shaded panel(s) with p ...
Utility frequency
The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency of the oscillations of alternating current (AC) in an electric power grid transmitted from a power plant to the end-user. In large parts of the world this is 50 Hz, although in the Americas and parts of Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains power around the world.During the development of commercial electric power systems in the late 19th and early 20th centuries, many different frequencies (and voltages) had been used. Large investment in equipment at one frequency made standardization a slow process. However, as of the turn of the 21st century, places that now use the 50 Hz frequency tend to use 220–240 V, and those that now use 60 Hz tend to use 100–127 V. Both frequencies coexist today (Japan uses both) with no great technical reason to prefer one over the other and no apparent desire for complete worldwide standardization.Unless specified by the manufacturer to operate on both 50 and 60 Hz, appliances may not operate efficiently or even safely if used on anything other than the intended frequency.