A certain unfiltered HW rectifier is powered by 120Vrms with turn ratio of N1:N2 = 6:1 (draw figure). Determine; a. 2nd voltage rms b. Peak 2nd voltage c. DC load voltage
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A certain unfiltered HW rectifier is powered by 120Vrms with turn ratio of N1:N2 = 6:1 (draw figure). Determine;
a. 2nd voltage rms
b. Peak 2nd voltage
c. DC load voltage
d. DC load current
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- A single-phase fully controlled, full-wave, bridge rectifier has a source of 220 V rms at 50 Hz. The firing angle α = 45˚ and the current extinction angle β =255˚; (i) Determine whether the current is continuous or discontinuous and write the condition. (ii) Sketch the appropriate load voltage and load current waveform. (iii) If the firing angle is increased into 110˚, state the polarity of voltage and power for that condition.Determine the peak output voltage for the bridge rectifier in this figure. Assuming the practical model, The transformer is specified to have a 12 V rms secondary voltage for the standard 110 V across the primary. (2nd Approximation)A 3.3-V, 30-A dc power supply is to be designed with a ripple of less than1.5percent. Assume that a half-wave rectifier circuit (60 Hz) with a capacitor filter is used. (a) What is the size of the filter capacitor C? (b)What is the PIV rating for the diode? (c)What is the rms value of the transformer voltage needed for the rectifier?(d) What is the value of the peak repetitive diode current in the diode? (e) What is the surge current at t =0+?
- A single-phase fully controlled, full-wave, bridge rectifier has a source of 220 V rms at 50 Hz, and is feeding a load 15 Ω and 10 mH. The firing angle α = 60˚ and the current extinction angle β =250˚; Determine (a) Average load voltage and current (b) RMS load voltage and current (c) AC and DC powers absorbed by the load (d) Determine the efficiency of the converter (e) Sketch the appropriate load voltage and load current waveforms (f) Determine whether the current is continuous or discontinuousA single-phase fully controlled, full-wave, bridge rectifier has a source of 230 V rms at 50 Hz, and is feeding a load R = 25 and L = 10 mH. The firing angle α = 45˚ and the current extinction angle β =230˚. It is required to: (a) Sketch the appropriate load voltage and load current waveforms. (b) Determine whether the current is continuous or discontinuous. (d) Determine the average load voltage and current. (e) Determine the rms load voltage and current. (f) Determine the a.c. and d.c powers absorbed by the load. (g) Determine the efficiency of the converter.a half-wave rectifier circuit in the figure below has a transformer inserted between the source and the remainder of the circuit. The source is 240 Vrms at 60 Hz, and the load resistor is 20 ohm. (a) Determine the required transformer turns ratio (Ns/Np) so that the average load current is 12 A. (b) Determine the average current in the primary winding of the transformer.
- A three-phase, half-wave uncontrolled rectifier is fed from an ideal three-phase voltage source of 380V, 50 Hz. The load is resistive with R=15 2. Calculate: (a) The average output voltage and average load current of the rectifier. (b) The d.c. and a.c. power dissipations in the load. (c) The diode ratings. (d) What is the lowest ripple frequency of the output voltage waveform?Consider the full-wave rectifier circuit shown below, where• vS(t) is a sinusoidal signal with a peak value (Vs = 5 V).• Diodes are modelled using constant voltage model with VDO = 0.7 V• The ac line voltage has an rms value of 120 V and a frequency (f) = 60 Hza) Calculate the transformer turns ratio. b) Plot in the same graph signal vS(t) and the output signal vO(t) versus time (t) (show all details including amplitudes, time instances, etc.) c) Calculate the rms value of the output signal vO(t). (hint: sin2(x) = 0.5(1- cos(2x))) d) If a capacitor C=3.58 F is connected across R = 10 k, repeat (b) in a new graphCalculate the rms load current for the single phase uncontrolled half-wave rectifier when the source voltage of 200V at a frequency of 50Hz, and load resistance is 10ohm.
- A 2500-V, 2-A, dc power supply is to be designed with a ripple voltage ≤ 0.5 percent. Assume that a half-wave rectifier circuit (60 Hz) with a capacitor filter is used. (a) What is the size of the filter capacitor C? (b) What is the minimum PIV rating for the diode? (c) What is the rms value of the transformer voltage needed for the rectifier? (d) What is the peak value of the repetitive current in the diode? (e) What is the surge current at t =0+?The secondary input voltage to a single phase diode bridge rectifier is 50V, 50Hz, and the load can be replaced by a resistance of value 20ohms (a) Sketch a well labelled circuit of the converter described above. (b) Sketch the waveforms for the input voltage, output voltage, output current, and output current (c) Derive an equation for average output voltage and calculate for output dc voltage (d) Calculate the ripple factor of the output voltage (e) Transformer utilization factor (h) How can the ripple be improvedQ.1 A single-phase diode bridge rectifier is connected to a grid with rms voltage V, 230V at 50 Hz. Assume that the load is highly inductive, so it could be represented by a constant dc current, Id = 10A. a) Sketch the load voltage and find the average voltage of the load? b) Sketch the source current (grid. AC side) and find the rms value of the source current? c) Determine the fundamental source current and the first three harmonics? Assume Ish_rms ³ 0.91a/h for odd hand 0 otherwise?