3.21 я A three-phase half-wave controlled rectifier is connected to a star supply and a resistive load R =10 2. If the rectifier is turned-on at a firing angle of 60°, calculate average and rms output voltages and currents. Assume phase supply voltage to be 120 V. [Ans: 70 V, 106.8 V, 7 A, 10.68 A]
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- A single-phase full-wave rectifier is connected to an AC source with a peak voltage of 170 V and a frequency of 60 Hz. The load resistance is 502.-,- three phase half wave controlled rectifier with resistive load (R=10 2) if the input supply voltage is (Vrms = 380 Volt and f= 50 Hz) and the trigger angle (a = 60°), then determine the followings:- a) Draw the rectifier circuit. b) Draw to scale the input voltage, the load voltage and the current waveforins. c) Calculate the average value of the output voltage.For the full wave rectifier circuit shown in Figure 1, calculate: 1) The maximum current through the load. 2) The average current through the load. 3) The average voltage across the load. 4) The rms value of the current. 5) The rectification efficiency. Vms = 280V Vin RL= 12ks2 Vrms = 280V Figure 1
- a) Draw the 3-phase half-wave uncontrolled rectifier circuit for resistive load.b) Briefly explain the purpose of use.c) Draw the sinusoidal input voltages and the output voltage on the load.A half-wave rectifier is to provide an averagevoltage of 50 V at its output.a. Draw a schematic diagram of the circuit.b. Sketch the output voltage waveshape.c. Determine the peak value of the output voltage. d. Sketch the input voltage waveshape.e. What is the rms voltage at the input?A 60 Hz sinusoidal voltage with an RMS value of 240 V is applied to a single-phase full-wave SCR rectifier. The RMS output voltage of the rectifier is 237 V, the firing angle (in degrees) of SCR is would be: A. 45 B. None of the other choices are correct O C. 60 OO D. 36 O E. 30
- A single-phase half wave uncontrolled rectifier circuit is operating with a purely inductive load and a source voltage of 100 sin (277t) V. An ideal PMMC ammeter is connected in series with the inductive load reads 20 A. Calculate the distortion factor of the rectifier. Answer Choices: a. 0.866 b. 0.707 c. 0.577 d. 0.816(a) A centre tapped rectifier has the following parameters: Ngec 0.2, Vp(pri) = 240 V,f = 120 Hz Npri Determine the ideal average voltage (Vpc), peak inverse voltage (PIV), rms ripple voltage (Vr(rms) and ripple percentage (r) of this rectifier circuit.iii. For fully controlled single phase bridge rectifier with inductive load (load current is continuous) ,supply voltage 220 V(RMS) and a=30° .The mean value of output voltage is : (a) 150.32V (b) 171.52V (c) 120.98V
- A three-phase half wave control rectifier is operated from 3-phase source 230 V, 50 HZ (supply) with load resistance R = 10 22. An average output voltage of 50% of the maximum possible output voltage is required. Determine a) firing angle, b) average and rms value of load current, and c) the efficiency.H.W:- For a single phase half wave uncontrolled rectifier if the input supply voltage is (v= 310 sin314t), at frequency (f= 50 Hz). Then determine the followings:- Vm. Vmean- i. Draw the rectifier circuit. un %3D ii. Draw the input and the output voltages waveforms. iii. Determine the mean and rms values of the output voltage. s Ec iv. If the load is (R=10 S), then determine the mean and rms values of the current. 2019Fest For the controlled half-wave rectifier, the average voltage across a resistor 10052 load is 34 V from a 120-V rms 60-Hz Ac source. Determine a) The power absorbed by the resistance b) The RMS load Voltage and Current c) The power factor. I