Modeling and Control of a Variable-Speed Constant-Frequency Synchronous Generator With Brushless Exciter
... generator and a reduced-rating power converter, as shown in Fig. 1(b). The former offers simple configurations for generators but employs expensive power electronics converters. If a squirrel-cage induction generator is in place, it must be connected to a stable voltage source for excitation and rea ...
... generator and a reduced-rating power converter, as shown in Fig. 1(b). The former offers simple configurations for generators but employs expensive power electronics converters. If a squirrel-cage induction generator is in place, it must be connected to a stable voltage source for excitation and rea ...
An alternator is an electrical generator that converts mechanical
... produce the rotating magnetic field. All devices that use permanent magnets and produce alternating current are called PMA or permanent magnet alternator. A "permanent magnet generator" (PMG) may produce either alternating current, or direct current if it has a commutator. If the permanent magnet de ...
... produce the rotating magnetic field. All devices that use permanent magnets and produce alternating current are called PMA or permanent magnet alternator. A "permanent magnet generator" (PMG) may produce either alternating current, or direct current if it has a commutator. If the permanent magnet de ...
Overview of power electronic drives for electric vehicles
... By replacing the field winding of conventional synchronous motors with PMs, PMS motors can eliminate conventional brushes, slip-rings, and field copper losses. Actually, these PMS motors are also called as PM brushless AC motors or sinusoidal-fed PM brushless motors because of their sinusoidal AC wa ...
... By replacing the field winding of conventional synchronous motors with PMs, PMS motors can eliminate conventional brushes, slip-rings, and field copper losses. Actually, these PMS motors are also called as PM brushless AC motors or sinusoidal-fed PM brushless motors because of their sinusoidal AC wa ...
Si4455 LOW-POWER PA MATCHING
... The CLE type has the best efficiency but higher VDD and temperature variations. Its current consumption and the peak voltage on the TX pin are sensitive to termination impedance variations. To some extent, the high VDD variation can be cured efficiently at low power levels (e.g., 10 dBm) by the so-c ...
... The CLE type has the best efficiency but higher VDD and temperature variations. Its current consumption and the peak voltage on the TX pin are sensitive to termination impedance variations. To some extent, the high VDD variation can be cured efficiently at low power levels (e.g., 10 dBm) by the so-c ...
LT6301 - Dual 500mA, Differential xDSL Line Driver in 28-Lead TSSOP Package
... significant amount of power and heat compared to other components in the system. The large peak to RMS variations of DMT and CAP ADSL signals require high supply voltages to prevent clipping, and the use of a step-up transformer to couple the signal to the telephone line can require high peak curren ...
... significant amount of power and heat compared to other components in the system. The large peak to RMS variations of DMT and CAP ADSL signals require high supply voltages to prevent clipping, and the use of a step-up transformer to couple the signal to the telephone line can require high peak curren ...
Amplifiers and Modulators
... »» High gain (up to 40 dB), high output (122 dBµV) »» Slope adjustment on VHF/UHF and UHF inputs »» 4 inputs and 5/12 VDC switchable ...
... »» High gain (up to 40 dB), high output (122 dBµV) »» Slope adjustment on VHF/UHF and UHF inputs »» 4 inputs and 5/12 VDC switchable ...
IOSR Journal of Electronics & Communication Engineering (IOSR-JECE) ISSN : www.iosrjournals.org
... RTU 1TO 19 1TO 32 1TO 34 1TO 31 SYNCROPHASOR TECHNOLOGY THROUGH GPS SYSTEM There are 24 Nos SATELLITES which are in 24 orbits at the distance of 16000 km from Earth and 6 orbits are being viewed all time giving time accuracy of 1 micro seconds. The advent of SATELLITE based time keeping systems adva ...
... RTU 1TO 19 1TO 32 1TO 34 1TO 31 SYNCROPHASOR TECHNOLOGY THROUGH GPS SYSTEM There are 24 Nos SATELLITES which are in 24 orbits at the distance of 16000 km from Earth and 6 orbits are being viewed all time giving time accuracy of 1 micro seconds. The advent of SATELLITE based time keeping systems adva ...
W044151159
... the isolated power system, voltage restoration will be examined next. As stated earlier, voltage control of the ESS is necessary to ensure the proper operation of the SC and to protect the device. Thus it is desirable to regulate the power transfer between the SC and the external system so that Vdc ...
... the isolated power system, voltage restoration will be examined next. As stated earlier, voltage control of the ESS is necessary to ensure the proper operation of the SC and to protect the device. Thus it is desirable to regulate the power transfer between the SC and the external system so that Vdc ...
LT5503
... Modulation Accuracy Insensitive to Carrier Input Power Modulator I/Q Inputs Internally Biased Available in 20-Lead FE Package ...
... Modulation Accuracy Insensitive to Carrier Input Power Modulator I/Q Inputs Internally Biased Available in 20-Lead FE Package ...
Aalborg Universitet EHV/HV Underground Cable Systems for Power Transmission Bak, Claus Leth
... We MUST be able to trust results obtained with such simulation models, or else we cannot design an UGC in a reliable way! The ONLY way to validate such simulation tools is by comparing to high‐quality real, full scale UGC measurements. ...
... We MUST be able to trust results obtained with such simulation models, or else we cannot design an UGC in a reliable way! The ONLY way to validate such simulation tools is by comparing to high‐quality real, full scale UGC measurements. ...
Multilevel Selective Harmonic Elimination PWM - SPEED-2016
... objective of this paper is to investigate and successfully implement the optimal firing strategy for harmonics elimination in single-phase and three-phase voltage-source Inverters. N o v e l Optimization technique has been proposed to generate optimal switching patterns for the single-phase and thre ...
... objective of this paper is to investigate and successfully implement the optimal firing strategy for harmonics elimination in single-phase and three-phase voltage-source Inverters. N o v e l Optimization technique has been proposed to generate optimal switching patterns for the single-phase and thre ...
H02P - Cooperative Patent Classification
... dynamo-electric converters (starting of synchronous motors with electronic commutators except reluctance motors, H02P 6/20, H02P 6/22; starting dynamoelectric motors rotating step by step H02P 8/04; vector control H02P 21/00) . Details . . {Protection against "no voltage condition"} . . {Security de ...
... dynamo-electric converters (starting of synchronous motors with electronic commutators except reluctance motors, H02P 6/20, H02P 6/22; starting dynamoelectric motors rotating step by step H02P 8/04; vector control H02P 21/00) . Details . . {Protection against "no voltage condition"} . . {Security de ...
WT500 Power Analyzer
... Appliances that are promoted as being safer than gas-operated stoves. A large amount of current is applied and converted to heat in order to increase the output of IH cooking heaters. The WT500 can measure voltage, current, power, and total harmonic distortion (THD) by inputting the large current (u ...
... Appliances that are promoted as being safer than gas-operated stoves. A large amount of current is applied and converted to heat in order to increase the output of IH cooking heaters. The WT500 can measure voltage, current, power, and total harmonic distortion (THD) by inputting the large current (u ...
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.