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3-Phase Power Factor Correction, Using Vienna
3-Phase Power Factor Correction, Using Vienna

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
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... Fig 3.1:Current reference generation for the inverter control Consequently, two groups of per-unit signals can be derived with divisions, that is i+ α + ji+ β and i−∗ α +ji−∗ β ,According to the principle described in section II, negative-sequence currents are designed to keep a phase-shift θ− with ...
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... The LN CSAC provides a 10 MHz sine wave output and 1 PPS output, with short-term stability [Allan Deviation] of ≤2E-11 @ TAU = 1 sec, long–term aging of ≤9E-10/month, and maximum frequency change of ±5E-10 over an operating temperature range of –10°C to +35°C. ...
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... error-voltage-controlled-current-source for the purposes of small-signal analysis. This is illustrated by Figure 2. The two-pole control-to-output frequency response of these converters is reduced to a single-pole (filter capacitor in parallel with load) response. One result is that the error amplif ...
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... 1Ω at 6MHz and with less than 2% capacitance change from 20Hz to 6MHz is a candidate for use in FMS6410B circuits. Many capacitors meet these requirements. With the right capacitors, their cost is no barrier to using the FMS6410B. ...
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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.
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