de -Idc (c) 0 first 2 harmonics of b T If ripple-free load current in steady-state is assumed, the input current is waveform of the single-phase full-wave rectifier may then be depicted as shown in the figure above for an ideal input transformer. With the assumption that the supply is ideal and perfectly smooth and ripple free load current, which implies an infinitely large load inductance, it is quite straightforward to obtain an analytical expression for the input current harmonics. The rectangular wave is defined as de By using the full range Fourier Series, compute the 270 Ide when 0
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- (b) A three-phase uncontrolled bridge rectifier is connected to an AC supply of 415V through a delta-star transformer as shown in the Figure. The load consists of large inductance to render a level load current of 60A at 300V. Assuming voltage drop across the power device to be 0.7V, compute the following: i) Rms value of secondary phase voltage and current; ii) Rms value of primary phase voltage and current3; iii) Transformer power rating in kVA and transformation ratio; iv) Device ratings. 本の。 本の 本の Load 本の。 本。 本の。 FigureIn a given circuit below is connected to an AC signal with 240V peak in a 4:1 transformer. Sketch the voltagewave form at VA and Vo as practical diode. (Show Complete Solution)Q5. For the following center tapped transformer, show the waveform across each half of the secondary winding and across Ri, when a 100 V peak sine wave is applied to the primarywinding. What is the PIV rating must the diode have? (Use constant voltage drop model for the Silicon diode) IN4001 Ry OV 10k) D IN4001
- Describing the concept of discontinuous conduction mode in power converters, how does continuous conduction mode differ?Make a DC-DC converter circuit that operates in discontinuous conduction mode.(c) A buck converter, as shown in Figure Q3(i) below, is working in steady state. The output voltage and the inductor current can be assumed to be ripple free. Figure Q3(ii) shows the inductor voltage VL during a complete switching interval. Assuming all devices are ideal, determine (i) The output voltage, input voltage and the duty cycle of the buck converter. (ii) The inductor value required to maintain a peak-to-peak ripple current of 0.4A, if the switching frequency is 100kHz. V. M 30V 本D c+ v. TON TOFF 20V Ts (i) (ii) Figure Q3. (i) Equivalent circuit of a buck converter and (ii) inductor voltage over one complete cycle.is Idc -Idc 0 K de 27 If ripple-free load current in steady-state is assumed, the input current is waveform of the single-phase full-wave rectifier may then be depicted as shown in the figure above for an ideal input transformer. With the assumption that the supply is ideal and perfectly smooth and ripple free load current, which implies an infinitely large load inductance, it is quite straightforward to obtain an analytical expression for the input current harmonics. The rectangular wave is defined as when 0EXAMPLE: A single-phase, full-wave center-tapped rectifier supplies power to a 1-k2 load. The ac voltage applied to the diode is 600 V rms. If the diode resistance is 25 N and that of the transformer secondary is negligible. Determine (a) average load current (b) average value of load voltage Note: The rms value of the ac voltage across each secondary half is 300 V.A R-load half-wave rectifier used sinusoidal voltage source with a peak value (35.353kV). The firing angle is (30). The total resistance is 50k2 and frequency is 50HZ. Calculate (in details): load direct voltage, maximum direct voltage, normalized voltage and effective voltage, power delivered to the load, power factor, form factor, ripple factor?QUESTION 3 is dc -Lac 0 f(t) = Ide T If ripple-free load current in steady-state is assumed, the input current is waveform of the single-phase full-wave rectifier may then be depicted as shown in the figure above for an ideal input transformer. With the assumption that the supply is ideal and perfectly smooth and ripple free load current, which implies an infinitely large load inductance, it is quite straightforward to obtain an analytical expression for the input current harmonics. The rectangular wave is defined as de 270 when 0< t < π when_πAn ideal single-phase full wave rectifier circuit has a non-inductive resistanceload, negligible tube drops and no transformer losses. What is therectification or conversion efficiency in percent?4. For the circuit shown in the figure below uses a transformer of 230V/12V-0-12V and all diodes are Ge find the following, RL-3.3k2. The name of the circuit is ........ Current through the load is............The DC output voltage is............ Draw the input & output wave forms ✈ ellel eetee CT D₂ DE www R₂2.A single phase uncontrolled half wave rectifier has a transformer with a turns ratio of 5:1, has a source of 220Vrms at 60 Hz frequency, its supplies the load with a 100ohm resistance. Find: A. Average voltage and current and also in RMS B. Power and ripple factorSEE MORE QUESTIONSRecommended textbooks for youIntroductory Circuit Analysis (13th Edition)Electrical EngineeringISBN:9780133923605Author:Robert L. 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