Results 21 to 30 of about 858,505 (337)
A Fully-Integrated Quad-Band GSM/GPRS CMOS Power Amplifier [PDF]
, 2008 Concentric distributed active transformers (DAT) are used to implement a fully-integrated quad-band power amplifier (PA) in a standard 130 nm CMOS process.
Aoki, Ichiro +8 more
core +1 more source
Frequency Domain Diagnostics of Transformer Insulation
Приборы и методы измерений, 2019 The first part of paper deals with the base information about diagnostics of power transformers. In this part are presented differently insulating methods, for example method of recovery voltage method, method of polarization and depolarization currents ...
M. Gutten +6 more
doaj +1 more source
STUDY AND DESIGN OF SINGLE PHASE CONVERTER USING OF SINGLE PHASE TRANSFORMER
International Journal of Research -GRANTHAALAYAH, 2016 The field of electrical transformer are most important equipment which is use to convert ac voltage or current like lower to higher , higher to lower without change in the frequency . its primary side and secondary side are isolate from each other and it can higher or lower voltage level the apparent value of electrical passive element like inductive ,
Prof. G.R.Kumrey, Dr. S. K. Mahobia
openaire +2 more sources
Turn-to-turn fault protection technique for synchronous machines without additional voltage transformers [PDF]
, 2017 This paper presents a novel protection technique for the detection of inter-turn faults in synchronous machines. It is based on the calculation of voltage in the stator windings from the usual phases and neutral voltage, typically available in ...
Gyftakis, Konstantinos N. +2 more
core +1 more source
Transformer Impedance Calculation Using the Finite Element Method [PDF]
CientíficaThe design and construction of power transformers are complex tasks because they are high-capacity machines and must provide high reliability during their operation within the power system.
Rodrigo Ocón Valdez +3 more
doaj +1 more source
Medium voltage digital instrument transformer [PDF]
E3S Web of ConferencesInstrument transformers with digital output provides significant advantages, including those related to increased reliability of power system operation.
Ulyanov Dmitriy, Plakidin Roman
doaj +1 more source
Voltage regulation considerations for the design of hybrid distribution transformers [PDF]
, 2014 The future substation depends on finding a way to mitigate the effects of the drawbacks of the conventional legacy by employing the efficiency of the solid state switches [1].
Alqarni, M, Darwish, M, Radi, MA
core +1 more source
Smart Transformer-Based Single Phase-To-Neutral Fault Management [PDF]
IEEE Transactions on Power Delivery, 2019 The smart transformer (ST), with its high control capability, offers new features for optimizing the management of the distribution grid. The ST, by controlling the voltage in each phase independently, is able to manage the operations during grid faults, in particular in the single-phase ones.
Giovanni De Carne +3 more
openaire +2 more sources
Energies, 2023 The uses of grid-connected photovoltaic (PV) inverters are increasing day by day due to the scarcity of fossil fuels such as coal and gas. On the other hand, due to their superior efficiency, lower cost, smaller size, and lighter weight when compared to ...
Md. Faruk Kibria +4 more
semanticscholar +1 more source
Estimation of the Equivalent Circuit Parameters in Transformers Using Evolutionary Algorithms
Mathematical and Computational Applications, 2023 The conventional methods of parameter estimation in transformers, such as the open-circuit and short-circuit tests, are not always available, especially when the transformer is already in operation and its disconnection is impossible.
Hector Ascencion-Mestiza +5 more
doaj +1 more source