1. A closed-loop system is used to track the sun to obtain maximum power from a photovoltaic array. The tracking system is a feedback system with G(s) = 10r/(rs+1) and H(s) = 5, where T=4 seconds nominally, a. Calculate the sensitivity of this system for a small change in r.
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- A voltage commutated chopper operating at 1 kHz is used to control the speed of dc motor as shown in figure. The load current is assumed to be constant at 10 A. 00000 V = 250 V 1₁F XA vous 2mH The minimum time in uses for which the SCR M should be ON is01) For the Oscillation circuit shown in Figure (1), derive an expression for the frequency of oscillation. RI/RO>>hie). Figure (1) VCC R1 Rc L1 Q3 R2 C2 SLI Rs Cs C1 ww VoPropose an electronic circuit which has an input/output waveform like the one shown in the figure below. Name the circuit and draw it. Explain what will happen if the input frequency becomes very high. Z VIN VOUT
- A DC chopper has a resistive load of R = 10 2 and an input voltage of V5 = 220 V. When the chopper switch remains in the ON state, its voltage drop is Vch = 2 V. If the duty cycle is 50%, determine its average output voltage VoThe sinusoidal voltage trace displayed by the CRO, the time/cm switch is on 50 µs/cm and the volt/cm switch is on 20 V/cm. The width of one complete cycle is 3.6 cm and the peak to peak height is 5.8 cm. Determine the following: The frequency is = The peak to peak voltage is = The amplitude is = The R.M.S voltage is =Draw 1.5 cycles of the analog signal and show the location and the value of each sample. [Q1 A sinusoidal signal of frequency 800HZ is sampled at a rate of 4000 samples per second. [Q2) 23 transmitted simultaneously.
- 3(a). Consider that 235V, 50HZ supply is connected as an input CC to a single-phase Full converter circuit and the firing angle is set to a =90°. Also, consider that you have two types of load, one is 130V, tungsten bulb (resistive load) and another is 260V dc motor. (i). If 130V, tungsten bulb is connected load, analyze with circuit diagram, necessary waveforms, and equation, whether the bulb will glow its maximum intensity or not. (ii). If the 260V dc load, analyze with circuit diagram, necessary waveforms, and equation, whether the motor will run or not. a motor is connected as aCalculate the peak-to-peak inductor current ripple (in amperes) of a Buck converter assuming it operates in continuous current conduction mode. Circuit parameters are: Input voltage Vdc = 38 V, output voltage Vo = 17 V, PWM frequency fpwm = 50 kHz, inductor value 328 µH and capacitor value C = 10 µF. is S iL L I₂ Vac VA D VL ic C R₁ Please specify your answer in units of A to 2 decimal places. VThe waveform on the screen of horizontal division an oscilloscope is 4 squares high from bottom to top, as in the Figure below. sensitivity is Volts/Div, what is the peak- to-peak bottom) of the input signal, and what is the amplitude of vertical division If the 2.5 horizontal divisions set to 0.2 voltage (top-to- 4 vertical divisions the oscillation?
- For a full-wave phase control circuit draw the output voltage and current waveforms when firing angle α = 30°. Consider the load to be inductive.What type of an oscillator is this? Perform the simulation and answer the succeeding questions based on your simulation. Connect the circuit components illustrated Double-click the Oscilloscope to view its display. Set the time base to 200 µ s/Div and Channel A to 2V/Div. Select Auto triggering and DC coupling. Select Simulate/Interactive Simulation Settings, and select Set to Zero for Initial Conditions. xsc2 E Tig V1 12V 10ka R1 2.5mH L1 C1 Q1 1uf 0.5mH 1uF 1DEAL_BJT_NPN L2 1uf 5 10ka R2 R3 5000 0.5mH L3 2.The clamping circuit clamps or shift the input sinusoidal signal up or down. F