Homework Answers
To get maximum voltage scr should be triggered at minimum firing angle. So average output voltage is maximum when wt is at 0°
Option B
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6. The average output voltage is maximum when SCR is triggered at wt-. a)π b) 0...
A single phase half-wave SCR rectifier is used to reduce the average voltage across a nonlinear...
A single phase half-wave SCR rectifier is used to reduce the
average voltage across a nonlinear resistive load where the
resistive value is represented by
R = 0. 2 V^2(aver) + 5 Ω
Calculate the load average current when the source voltage is
110 V RMS and the triggering angle is 90 degrees
A single phase half-wave SCR rectifier is used to reduce the average voltage across a nonlinear resistive load where the resistive value is represented by aver Calculate...
Questions 1 to 3 relate to a three-phase SCR rectifier supplied from a 415 Vrms, 50 Hz ac source. For a 100 Ω resistive load, determine the peak, minimum and average load current for SCR firing angle...
Questions 1 to 3 relate to a three-phase SCR rectifier supplied from a 415 Vrms, 50 Hz ac source. For a 100 Ω resistive load, determine the peak, minimum and average load current for SCR firing angles of: (a) a-0° (5.87 A, 5.08 A, 5.6 A) (b) α = 45° (5.67 A, 1.52 A, 3.96 A) (c) α-70° (4.5 A, 0 A, 2.0 A) How will your answers change if a very large inductance (zero resistance) is added in series...
The IV characteristic of a SCR is shown in Fig. 4a, and a SCR circuit is...
The IV characteristic of a SCR is shown in Fig. 4a, and a SCR circuit is shown in Fig. 4b. lo (mA) 12 10 8 La - OA 6 4 Vcc (V) 100 120 140 160 180 20 40 60 80 Fig. 4a Voc 302 1002 VAK Vio Vo = 0.7V 1 OV Fig. 4b (a) Find the holding current IH. (b) Given that the supply voltage Vcc is 80V, the gate trigger current IGT is 12mA, calculate the minimum...
A Single-phase halfwave controlled rectifier is used for a heating system whose rated power is 15kW at 220V. The SCR is connected to a 220 VAC system. 1. Determine the rated equivalent resistance of the heater 2. Determine the maximum that the rectifie
A Single-phase halfwave controlled rectifier is used for a heating system whose rated power is 15kW at 220V. The SCR is connected to a 220 VAC system. 1. Determine the rated equivalent resistance of the heater2. Determine the maximum that the rectifier can provide to the heater3. When the SCR is fired at angle of p/3, determinea. Waveform of the voltages across the load, the SCRb. Waveform of the currents flow through the SCR, drawn by the load and supplied...
In the circuit below, the input voltage is Vin-Vinegakcos(wt), R-20 ΚΩandC15nFw l. in al Show that the output voltage is VotVcos (wt-), where V-V n peak/V1 + (RC) b) Show that this result justifies c...
In the circuit below, the input voltage is Vin-Vinegakcos(wt), R-20 ΚΩandC15nFw l. in al Show that the output voltage is VotVcos (wt-), where V-V n peak/V1 + (RC) b) Show that this result justifies calling this circuit a high-pass filter+ c) Find an expression for the phase constant δ in terms of R,C and d) At what frequency is Vi (1/V2) Vin peak? That particular frequency is known as the 3dB frequency, or f3dB, of the circuit
In the circuit...
D1 T1 c1 RL 15 3. The flyback converter shown, operates at 250 kHz. The 1 duty ratio ofswitch closed is D = 0.6. Determine: (a) Output voltage. (b) Average, minimum and maximum current in L1 (the mag...
D1 T1 c1 RL 15 3. The flyback converter shown, operates at 250 kHz. The 1 duty ratio ofswitch closed is D = 0.6. Determine: (a) Output voltage. (b) Average, minimum and maximum current in L1 (the magnetizing inductance.) (c) The output voltage ripple. Ll 1030uF 82
D1 T1 c1 RL 15 3. The flyback converter shown, operates at 250 kHz. The 1 duty ratio ofswitch closed is D = 0.6. Determine: (a) Output voltage. (b) Average, minimum and maximum...
You need to design a DC power supply that provides an average DC output voltage of...
You need to design a DC power supply that provides an average DC output voltage of 5V to charge your cellphone. The maximum allowed ripple at the output is ±200 mV. Your cellphone can be modeled as a 1 50Ω load. You have to use a bridge rectifier with four diodes. Note: For calculations, consider constant voltage drop model of the diode with V0 = 0.7V. (a) The charger is designed to use in the US, i.e. transformer primary is...
Solve 2cos0+4 = -6cOs 6 on the interval 0<θ< Σπ. π π. 2π 0, π. 2π...
Solve 2cos0+4 = -6cOs 6 on the interval 0<θ< Σπ. π π. 2π 0, π. 2π π3Τ 2 4
The figure shows a graph of the output from an AC voltage source. A. What is...
The figure shows a graph of the output from an AC voltage
source.
A. What is the maximum voltage Vmax of the source?
B. What is the average voltage Vavg of the source?
C. What is the root-mean-square voltage Vrms of the source?
D. What is the period T of the source?
E. What is the frequency f of the source?
-4 Time(s) 8 T 6 4202 (A)aStap9A
marginal product equals 0 when: a. average product equals 0 b. total product reaches its maximum...
marginal product equals 0 when: a. average product equals 0 b. total product reaches its maximum value c. total product equals average product d. average product reached its minimum value
A single phase half-wave SCR rectifier is used to reduce the
average voltage across a nonlinear resistive load where the
resistive value is represented by
R = 0. 2 V^2(aver) + 5 Ω
Calculate the load average current when the source voltage is
110 V RMS and the triggering angle is 90 degrees
A single phase half-wave SCR rectifier is used to reduce the average voltage across a nonlinear resistive load where the resistive value is represented by aver Calculate...
Questions 1 to 3 relate to a three-phase SCR rectifier supplied from a 415 Vrms, 50 Hz ac source. For a 100 Ω resistive load, determine the peak, minimum and average load current for SCR firing angles of: (a) a-0° (5.87 A, 5.08 A, 5.6 A) (b) α = 45° (5.67 A, 1.52 A, 3.96 A) (c) α-70° (4.5 A, 0 A, 2.0 A) How will your answers change if a very large inductance (zero resistance) is added in series...
The IV characteristic of a SCR is shown in Fig. 4a, and a SCR circuit is shown in Fig. 4b. lo (mA) 12 10 8 La - OA 6 4 Vcc (V) 100 120 140 160 180 20 40 60 80 Fig. 4a Voc 302 1002 VAK Vio Vo = 0.7V 1 OV Fig. 4b (a) Find the holding current IH. (b) Given that the supply voltage Vcc is 80V, the gate trigger current IGT is 12mA, calculate the minimum...
In the circuit below, the input voltage is Vin-Vinegakcos(wt), R-20 ΚΩandC15nFw l. in al Show that the output voltage is VotVcos (wt-), where V-V n peak/V1 + (RC) b) Show that this result justifies calling this circuit a high-pass filter+ c) Find an expression for the phase constant δ in terms of R,C and d) At what frequency is Vi (1/V2) Vin peak? That particular frequency is known as the 3dB frequency, or f3dB, of the circuit
In the circuit...
D1 T1 c1 RL 15 3. The flyback converter shown, operates at 250 kHz. The 1 duty ratio ofswitch closed is D = 0.6. Determine: (a) Output voltage. (b) Average, minimum and maximum current in L1 (the magnetizing inductance.) (c) The output voltage ripple. Ll 1030uF 82
D1 T1 c1 RL 15 3. The flyback converter shown, operates at 250 kHz. The 1 duty ratio ofswitch closed is D = 0.6. Determine: (a) Output voltage. (b) Average, minimum and maximum...
You need to design a DC power supply that provides an average DC output voltage of 5V to charge your cellphone. The maximum allowed ripple at the output is ±200 mV. Your cellphone can be modeled as a 1 50Ω load. You have to use a bridge rectifier with four diodes. Note: For calculations, consider constant voltage drop model of the diode with V0 = 0.7V. (a) The charger is designed to use in the US, i.e. transformer primary is...
Solve 2cos0+4 = -6cOs 6 on the interval 0<θ< Σπ. π π. 2π 0, π. 2π π3Τ 2 4
The figure shows a graph of the output from an AC voltage
source.
A. What is the maximum voltage Vmax of the source?
B. What is the average voltage Vavg of the source?
C. What is the root-mean-square voltage Vrms of the source?
D. What is the period T of the source?
E. What is the frequency f of the source?
-4 Time(s) 8 T 6 4202 (A)aStap9A
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