• Short time constant (delay time, dead times) T.: 1 ms System gain Ks: 7 • Proportional-action coefficient Kp = T₁ 2KsTa What is the value of T₁ and K, for optimal control?
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- A single phase full wave AC voltage controller has a resistive load of 5 ohms and an input voltage of Vs = 240 V (RMS), 50 Hz. The delay angles of both thyristors are set to 90 degrees. If the RMS output voltage Vo is equal to 169.7V, then the input power factor is equal to: Select one: a. 0.85 lagging b. 0.768 lagging c. 0.707 lagging d. None of theseA 80 MVA synchronous generator has Xs = j8Ω. The generator is supplying itsrated power to an infinite bus at a voltage of 33KV and a power factor of 0.9lagging.Determine the following:a) The generator emf (E) and the power angle.b) The maximum power (Pmax) that the generator can supply and the armaturecurrent (Ia) in this case (i.e. when the power is maximum) and what is thepower factor?Does Clampor circuit change the peak-to-peak (i.e., rms value)? Justfy
- An ac controller has a resistive load of R = 10 2 and the input is 220 V, 50 Hz. The thyristors switch is on for n 25 cycles and for m 75 cycles. Determine: (i) (ii) (iii) the rms value of the output voltage, the input power factor, the average and rms current through thyristors.The step down DC chopper uses DC source voltage V(dc) = 200 V and resistive load impedance of 10 ohm. The duty cycle is 0.4 the voltage drop across the switch may be taken as zero, Calculate : (a) Average and RMS value of output voltage. (b) Average and RMS value of output current.Comment briefly on the relationship between input and output power at varying excitation levels and on the relationship between excitation and power factor or reactive power, when the synchronous machine is connected to an infinite busbar
- A single phase full wave AC voltage controller has a resistive load of 5 ohms and an input voltage of Vs = 220 V (RMS), 50 Hz. The delay angles of both thyristors are set to 90 degrees. The maximum power that can be delivered to the load is: Select one: a. 5.65 kW b. 9.68 kW c. 11.52 kW d. None of theseA single phase voltage controller of 220 V, 50 Hz and a load of 10 Q. For 9 cycles on and 7 cycles off the rms output voltage and input power factor are: (a) 170 V, 0.7 (b) 165 V, 0.75 (c) 171 V, 0.78 (d) 180 V, 0.6Maz a) A sinewave is having a frequency of 50 Hz and instantaneous value of 250 Volts at 1.3 milli seconds. Find D The maximum value of sinusoidal voltage waveform and i) The value of voltage at 2.1 milli seconds. b) Determine the instantaneous equation for the voltage waveform shown in figure, if Vp=100 Volts, Time period is 10 milli seconds and 0 =40 degrees. on Vp Upload your Answers steps in the "Final Answer Submission" Link provided in the Moodle. a) (i) Maximnum value = a) (ii) Value of voltage at 2.1 ms = b) Angular frequency =
- A single-phase AC voltage controller has a resistive load R = 10 Ohm, and the RMS input voltage is Vs = 230 V, 60 Hz. The delay angle is 120 degree. Then output power is: Select one: O a. None of the above O b. 143 W O c. 215 W O d. 39 W O e. 1034 WA generator is feeding the load. A second load will then be connected in parallel with the first load. The generator has an idle frequency of 61Hz and an Sp slope of 1MW/Hz. Load2 draws 800kW active power at 0.707 reverse power factor, while load1 draws 1000kW active power at 0.8 reverse power factor. What will be the operating frequency of the system after load 2 is connected? *Please explain the solution step by step5. The single phase full wave AC voltage controller operates on a single phase supply voltage of maximum voltage as 230 V, at 50 Hz. If the triac is triggered at a delay angle of 45°, during each half cycle of input supply. Find the rms output voltage, input power factor and the power in the load. 6. A voltage source v= 100 sin 377t supplies a resistive load of 100 2 through a pair of back to back connected thyristor (ac regulator). Calculate the power in the load, if the thyristor firing angle is 2n/3 with respect to the supply voltage.