DESIGNING AN UNINTERRUPTIBLE POWER SUPPLY BASED ON
... turn ratio, leading to increased transformer loss and size. The Half-Bridge DC/DC Converters have efficiency lower than the other one during a light load. They are working at half the supply voltage the switching transistors are working at twice the collector current compared with the basic push pul ...
... turn ratio, leading to increased transformer loss and size. The Half-Bridge DC/DC Converters have efficiency lower than the other one during a light load. They are working at half the supply voltage the switching transistors are working at twice the collector current compared with the basic push pul ...
Augmentation Protection
... document) must be of different manufacturer or have differing operating principles. If this is not possible then permission from AEMO must be obtained to implement the proposed arrangement. All circuit breaker backup and dead zone trips must be independently initiated by X and Y primary protection ...
... document) must be of different manufacturer or have differing operating principles. If this is not possible then permission from AEMO must be obtained to implement the proposed arrangement. All circuit breaker backup and dead zone trips must be independently initiated by X and Y primary protection ...
Microsoft Word - AnytimeCE.com
... 6. At a sub-station near the end user, a/n ______ transformer is used. isolation step-up step-down ...
... 6. At a sub-station near the end user, a/n ______ transformer is used. isolation step-up step-down ...
Question Bank - International Virtual University Campus
... Qu.14. List various types of losses occurring in a transformer.How does each loss vary when (a) only the voltage varies (b) only frequency varies (c) load varies at constant voltage and frequency? Qu.15. A 2200/220, 44KVA transformer has 50 turns in the secondary. Assuming the losses to be negligib ...
... Qu.14. List various types of losses occurring in a transformer.How does each loss vary when (a) only the voltage varies (b) only frequency varies (c) load varies at constant voltage and frequency? Qu.15. A 2200/220, 44KVA transformer has 50 turns in the secondary. Assuming the losses to be negligib ...
High Voltage Pulse Modulators Tutorial
... of magnetron is ~433Ω. To provide power to this magnetron, we should have a transmission line with characteristic impedance close to 433Ω. Secondly the dc charging power supply has to have a voltage rating of two times of 49.8 kV, that is ~100 kV or, if we were to consider resonant charging using an ...
... of magnetron is ~433Ω. To provide power to this magnetron, we should have a transmission line with characteristic impedance close to 433Ω. Secondly the dc charging power supply has to have a voltage rating of two times of 49.8 kV, that is ~100 kV or, if we were to consider resonant charging using an ...
Occupancy Type-Demand Per
... Commercial Demand Method 1 attempts to estitnate demand based on the square foot area of the commercial building using unit demands derived from a study of customers with similar operational needs. Table 3.13 shows the volt-amps/fts unit demand that need to be converted to watts/fe in order to be us ...
... Commercial Demand Method 1 attempts to estitnate demand based on the square foot area of the commercial building using unit demands derived from a study of customers with similar operational needs. Table 3.13 shows the volt-amps/fts unit demand that need to be converted to watts/fe in order to be us ...
5. numerical and experimental results
... approximations. These approximations are more or less precise depending on the currents flowing through the induction machine’s windings. Relation (1) does not offer entirely a sufficient approximation especially in the cases where the machines are working in hard loading conditions such as start-up ...
... approximations. These approximations are more or less precise depending on the currents flowing through the induction machine’s windings. Relation (1) does not offer entirely a sufficient approximation especially in the cases where the machines are working in hard loading conditions such as start-up ...
Mitigation and Analysis of Very Fast Transient over
... oscillations which travel through the components of the system and suffer multiple reflections. These surges may cause internal flashovers to nearby grounded objects. Therefore over-voltages generated in GIS is a major parameter to be considered in insulation designs as it has bearing on many vital ...
... oscillations which travel through the components of the system and suffer multiple reflections. These surges may cause internal flashovers to nearby grounded objects. Therefore over-voltages generated in GIS is a major parameter to be considered in insulation designs as it has bearing on many vital ...
Stray Voltage: Sources and Solutions
... be a cause of stray voltage, and many times it is suggested that lowering this resistance will mitigate stray voltage conditions. The results of this approach are variable and often disappointing. The following examples will serve to illustrate how onfarm sources of stray voltage occur and the effec ...
... be a cause of stray voltage, and many times it is suggested that lowering this resistance will mitigate stray voltage conditions. The results of this approach are variable and often disappointing. The following examples will serve to illustrate how onfarm sources of stray voltage occur and the effec ...
Novel Three-Phase CM/DM Conducted Emission Separator
... C3 and C5 occurs. Aside from the inductance LΔ , also an asymmetric circuit causes DM voltages since the common currents in the three transformers are not equal, which is required for the Δ-connection to be effective as short circuit for DM. There, particularly an asymmetric leakage inductance or as ...
... C3 and C5 occurs. Aside from the inductance LΔ , also an asymmetric circuit causes DM voltages since the common currents in the three transformers are not equal, which is required for the Δ-connection to be effective as short circuit for DM. There, particularly an asymmetric leakage inductance or as ...
Solid-State Circuit Breakers and Current Limiters for
... losses are essential. As a result, the IGBT has a disadvantage in circuit breaker applications. Especially, the on-state losses of IGBTs are significantly higher than the losses of a thyristor based semiconductor (up to three times higher per device) [4], [5]. However, the IGBT has the advantage tha ...
... losses are essential. As a result, the IGBT has a disadvantage in circuit breaker applications. Especially, the on-state losses of IGBTs are significantly higher than the losses of a thyristor based semiconductor (up to three times higher per device) [4], [5]. However, the IGBT has the advantage tha ...
Transformer
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Commonly, transformers are used to increase or decrease the voltages of alternating current in electric power applications.A varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core and a varying magnetic field impinging on the transformer's secondary winding. This varying magnetic field at the secondary winding induces a varying electromotive force (EMF) or voltage in the secondary winding. Making use of Faraday's Law in conjunction with high magnetic permeability core properties, transformers can thus be designed to efficiently change AC voltages from one voltage level to another within power networks.Since the invention of the first constant potential transformer in 1885, transformers have become essential for the transmission, distribution, and utilization of alternating current electrical energy. A wide range of transformer designs are encountered in electronic and electric power applications. Transformers range in size from RF transformers less than a cubic centimeter in volume to units interconnecting the power grid weighing hundreds of tons.