What fuels the amplification process and how?
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What fuels the amplification process and how?
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- (b) Discuss the impact of connecting a large capacitor filter across the load in Figure Q1(ii). Use appropriate waveform sketch to aid your discussion. + Vp - Us R2 RL Vs ( (i) (ii) Figure Q1. Single phase half bridge rectifier: (i) with a Thyristor (ii) with a Diode5- The frequency of the output voltage obtained from three-phase Wye/Delta connected rectifier is :* 6 times the rated source frequency. 3 times the rated source frequency 2 times the rated source frequencyA 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
- For the half-wave controlled rectifier shown, the thyristor is fired at an angle of 35° (firing angle). Assume the input source to be 10sin(5000лt) V and R = 252. Derive the average and RMS expressions of the output voltage and calculate their values. Assume ideal thyristor. + VL- R www T₁Q: Design a regulated power supply with an input voltage of 220 V (RMS value) and output regulated voltage of 12V. Use Zener diode as regulating device. Provide the following for your design: a. Block diagram b. Schematic diagram c. Manual computation per section with corresponding output waveform. d. Show comparison of the input and output signal waveforms.- In d.c. generators armature reaction is produced by armature current O none of the mentioned compensating winding current field current O commutating winding current The use of d.c. generators elminated the use of rectifiers and ac supplies True False s If the number of layerallot is 4 then the number of colls the number of slots Equal to O none of the mentioned O twice O half O s In 2-pole machines: the wave winding have greater generated voltage than the lap winding'armatures True False For high rotating speed machines the number of poles munt be Little Tiue O Fale O O O
- a. A 80 V rms is stepped down to 18V rms by a transformer. The output from the transformer is rectified using a half wave rectifier circuit and connected to a 47.5 2 load resistor. Draw a circuit diagram of this arrangement and the waveform at each stage.Determine the readings of two ammeters – moving coil and rectifier systems with a single-period rectifier, with scales graduated to the rms values of the sinusoidal current. The ammeters are connected in an AC circuit with a symmetrical triangular current with an amplitude IMAX = 28 mA. Sinusoidal voltage form factor KF sin = 2.22 (for one-half rectifier).18. A dc-dc converter is to be built with the following specifications: Allowed dc input voltage range: +8 V to +18 V +24 V Output average voltage: Output voltage ripple: ±0.06 V maximum at rated load 300 W, resistive ±250 mA maximum at rated load 100 kHz Rated load: Input current ripple: Switching frequency: Common ground between input and output. a. Draw a circuit which can perform this function. b. What is the necessary range of duty ratio for each switch? c. Find circuit part values (R, L, and C) which will meet the stated specifications.
- EX2: (Buck dc-dc converter. Evaluation of the output voltage ripple) A buck converter has the following specifications: Vin= dc input voltage =50 V, D = duty cycle=D0.4, L=400 µH, C=100 µF f,= switching frequency = 20 kHz, R=20 2 Assuming that the converter is ideal, calculate: a) The output voltage. b) The maximum and minimum inductor current values. c) The output voltage ripple.(a) Figure 1(a) is a sinusoidal oscillator. Given that the feedback factor is: R³ B === V₂ By assuming no loading effect, i) State the function of diodes D₁ and D2. ii) Obtain the expression for oscillation frequency f, and calculate its value. iii) Prove that during oscillation, V₁ R³+j- 1 5R .6R² @³C³ w²C² @C iv) Calculate the value of R₂ that will allow this circuit to start and maintain oscillation. Proof that the calculated value will be able to start and maintain oscillation. 2R 200Ω с 0.1 μF 2R 200Ω B = V₂ R₁ 0.5ΚΩ D1 +4 R 10092 D2 с 0.1 μF HE R₂ +15V -15V с 0.1 μF R 10092 - VoIn a full-wave bridge rectifier equivalent DC output voltage circuit, calculate the effective DC voltage output given a Vin(RMS)=110 V (60 Hz) and the turns has a ratio of 10:1. Explain each step of your calculation briefly.
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