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What is an ideal transformer Draw the no load phasor diagram of transformer?
Wiki User
∙ 11y ago
Resistance ideal transformer is the one having no core losses, infinite permeability no mmf needed to set up flux), windings are having no resistances or reactances.
Wiki User
∙ 11y ago
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What is a phasor diagram and why you draw it?
Theoretically, it can be drawn at any angle. Normally, however. it is drawn along the real, positive, axis (i.e. facing East). For series circuits, the reference phasor is the current and, for parallel circuits, the reference phasor is the voltage. For transformers, it is the flux.
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How do you identify step up or step down transformer from phasor diagram?
Number of turnsAnswerI assume that you have a phasor diagram of a transformer, and wish to identify the primary phasors and the secondary phasors?For a three-phase transformer, this is fairly straightforward, provided the usual procedure for drawing a phasor diagram has been followed. Whenever you start to draw anysort of phasor diagram, you usually start by selecting a phasor of reference and draw that in the horizontal positive direction. For a three-phase transformer, the phasor of reference is usually the primary phase voltage A (or however else it is identified: R, red, or whatever). The remainder of the primary phase voltages are then drawn, enabling the primary line voltages to be constructed (which, in the case of a primary delta are the same as the primary phase voltages!). So if you can identify the phasor of reference, then you have identified the primary-winding phasor diagram. As the primary and secondary voltages are not usually drawn to scale, relative to each other, you can't assume a turns ratio from the phasor diagram. The labelling might also help, as high-voltage phase and line voltages are identified by upper-case letters, while low-voltage phase and line voltages are identified using lower-case letters -but, remember, these identify high- and low-voltages, not which is primary and which is secondary (primary winding is connected to supply/secondary winding is connected to load).For single-phase transformer, the phasor of reference is the flux set up in the magnetic circuit, and voltages/current phasors are drawn relative to this. In this case, the primary line and induced voltages are usually identified as V1 and E1, and the secondary induced voltage as E2 (sometimes, the Es and Vs are interchanged). Again, the lengths of the primary and secondary voltages are not necessarily to scale relative to each other.
How do you draw phasor diagram Anderson Bridge?
firstly take the reference of i1 then through i1 we can follow up to the end
What is a phasor diagram and why you draw it?
Theoretically, it can be drawn at any angle. Normally, however. it is drawn along the real, positive, axis (i.e. facing East). For series circuits, the reference phasor is the current and, for parallel circuits, the reference phasor is the voltage. For transformers, it is the flux.
What is the vector diagram of ynd11 transformer?
In the vector group representation for this transformer, the letter 'y' represents a wye- or star-connection, and the letter 'd' represents a delta- or mesh-connection (I have no idea what 'n' stands for -anyone?). An upper-case letter indicates the higher voltage, while a lower-case letter represents the lower voltage. The sequence of the letters indicates the primary and the secondary windings. So the transformer in question is a wye-delta connection (presumably the 'y' should have been capitalised, meaning that this is a step-down transformer: i.e. Yd11).The number appearing after the letter group (in this case '11') is a multiplier of 30o and indicates the transformer connection's angular displacement (or phase displacement). In this case, the angular displacement is 11 x 30o = 330o.As angular displacement is defined as 'the angle by which the secondary line voltages lag the primary line voltages', this means the secondary line voltages of this particular transformer lags its corresponding primary line voltages by 330o.So, to draw the phasor (not 'vector') diagram for this particular transformer, you would start by drawing the phase voltages (VAN, VBN, and VCN) of the primary wye connection (using VAN as the phasor of reference), from which you would then construct the corresponding line voltages (VAB, VBC, and VCA). To finish the diagram, you will then draw the secondary delta phasor diagram, starting with Vab lagging VAB by 330o (or, if you prefer, leading by 30o), then drawing Vbc and Vca displaced by 120o.
How do you draw phase diagram for transformer operating at load with lagging PF and leading PF?
In order to draw the phase diagram for transformer operating at load with lagging PF and leading PF, you will need to know the equation for the transformer being load free. This constant will help you with the load bearing equation of Np/Ns=Vp/Vs=Is/Ip.
How do you draw phasor diagram of maxwell bridge?
For Series Circuits (example for R-L circuit)Because current is common throughout a series circuit, current is taken as the phasor of reference for series AC circuits. So, we start by drawing a current phasor at 0o. Since the voltage across a purely resistive component (VR) is in phase with the current, we next draw VR in phase with the reference phasor. Since the voltage across a purely inductive component (VL) leads the current by 90o, we draw VL at 90o. We vectorially add phasors VR and VL to give V, the supply voltage. The angle between V and the reference phasor, I, is the phase angle. To create an impedance diagram, divide each voltage by the reference. To create a power diagram, multiply each voltage by the reference.For Parallel Circuits (example for R-L circuit)Because voltage is common across each branch of a parallel circuit, voltage is taken as the phasor of reference for parallel AC circuits. So, we start by drawing a voltage phasor at 0o. Since the current through a purely resistive branch (IR) is in phase with the voltage, we next draw IR in phase with the reference phasor. Since the current through a purely inductive branch (IL) lags the current by 90o, we draw IL at -90o. We vectorially add phasors IR and IL to give I, the load current. The angle between I and the reference phasor, V, is the phase angle. To create an admittance diagram, divide each current by the reference. To create a power diagram, multiply each current by the reference.
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