Aalborg Universitet Control Strategies for Islanded Microgrid using Enhanced Hierarchical Control
... provide a controlled and high-quality power exchange with the grid or local loads. In islanded mode, the local loads should be supplied by the DG units, which now act as controlled voltage sources (CVS) [3]. And the MGs need some form of control in order to avoid circulating currents between the DG ...
... provide a controlled and high-quality power exchange with the grid or local loads. In islanded mode, the local loads should be supplied by the DG units, which now act as controlled voltage sources (CVS) [3]. And the MGs need some form of control in order to avoid circulating currents between the DG ...
acknowledgment
... tremendously popular, and hundreds of stations went on the air during the 1920s in the U. S. alone. The need for inexpensive, reliable radio receivers that the average homeowner could use led to improvements in radio technology. Finally, armed with improved equipment, both professional researchers a ...
... tremendously popular, and hundreds of stations went on the air during the 1920s in the U. S. alone. The need for inexpensive, reliable radio receivers that the average homeowner could use led to improvements in radio technology. Finally, armed with improved equipment, both professional researchers a ...
FSDH0265RN, FSDM0265RN
... mode PWM feedback, these are not enough to protect the FPS when a secondary side diode short or a transformer pin short occurs. In addition to start-up, soft-start is also activated at each restart attempt during auto-restart and when restarting after latch mode is activated. The FPS has an internal ...
... mode PWM feedback, these are not enough to protect the FPS when a secondary side diode short or a transformer pin short occurs. In addition to start-up, soft-start is also activated at each restart attempt during auto-restart and when restarting after latch mode is activated. The FPS has an internal ...
AC motor & drive - syncronous
... • Their power factor can be adjusted to unity by using a proper field current relative to the load. Also, a "capacitive" power factor, (current phase leads voltage phase), can be obtained by increasing this current slightly, which can help achieve a better power factor correction for the whole insta ...
... • Their power factor can be adjusted to unity by using a proper field current relative to the load. Also, a "capacitive" power factor, (current phase leads voltage phase), can be obtained by increasing this current slightly, which can help achieve a better power factor correction for the whole insta ...
Abstract
... Conventional high frequency speakers have a number of drawbacks. One of the most difficult issues to address is the mass of the speaker. The voice coil, suspension system, and cone or dome of a conventional speaker all move to generate sound. Together, they add up to much more mass than that of the ...
... Conventional high frequency speakers have a number of drawbacks. One of the most difficult issues to address is the mass of the speaker. The voice coil, suspension system, and cone or dome of a conventional speaker all move to generate sound. Together, they add up to much more mass than that of the ...
LR Phono Preamps
... This effect of the parasitic shunt capacitance is called “selfresonance”. The inductor and its parasitic capacitance form a parallel resonant circuit, which has a very high impedance at the resonant frequency Generally, the higher the inductance, the lower the SRF (Self Resonant Frequency), since th ...
... This effect of the parasitic shunt capacitance is called “selfresonance”. The inductor and its parasitic capacitance form a parallel resonant circuit, which has a very high impedance at the resonant frequency Generally, the higher the inductance, the lower the SRF (Self Resonant Frequency), since th ...
MAX1479 300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter General Description
... in ASK mode and 20kbps in FSK mode (both Manchester coded). The device provides an adjustable output power of more than +10dBm into a 50Ω load. The crystal-based architecture of the MAX1479 eliminates many of the common problems of SAW-based transmitters by providing greater modulation depth, faster ...
... in ASK mode and 20kbps in FSK mode (both Manchester coded). The device provides an adjustable output power of more than +10dBm into a 50Ω load. The crystal-based architecture of the MAX1479 eliminates many of the common problems of SAW-based transmitters by providing greater modulation depth, faster ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... From the equation (1) two primary methods for speed control of 3-phase AC induction motor can be concluded: one is to change the magnetic polar pair numbers but the inflexibility and low efficiency of this method has limited its popularity of application. Another method is to regulate the stator cur ...
... From the equation (1) two primary methods for speed control of 3-phase AC induction motor can be concluded: one is to change the magnetic polar pair numbers but the inflexibility and low efficiency of this method has limited its popularity of application. Another method is to regulate the stator cur ...
Logically Speaking of Counters
... B. To generate a series of reference signals at known frequency intervals C. To display all frequency components of a transmitted signal D. To provide a signal source at a very accurate frequency ...
... B. To generate a series of reference signals at known frequency intervals C. To display all frequency components of a transmitted signal D. To provide a signal source at a very accurate frequency ...
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.