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QUESTION FOUR Draw a turn off snubber circuit for a MOSFET and explain how it operates....
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label th...
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label the drawn graph. [4 marks] (b) Name any two types of diodes AND any two types of thyristors. [4 marks] (c) Find the following values for the periodic current output of a diode rectifier with square voltage input and resistive load. The output is shown in the figure below. (i) Average (ii) Root mean square (RMS) (ii) RMS of the 1st harmonic (iv) Total...
Draw a well-labelled circuit diagram of a Buck-Boost converter and draw the equivalent circuit diagrams for...
Draw a well-labelled circuit diagram of a Buck-Boost converter and draw the equivalent circuit diagrams for its two modes of operation (no waveforms). Label all circuits. [30%] With the help of the circuits in 2(a)(i), explain the working of a Buck-Boost converter. [20%] (ii) (b) Consider the following single-phase, half-wave rectifier circuit that is used to charge a battery through a resistor R. GO v, = Vm sin ot = (i) Prove that the average value of the charging current...
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label...
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label the drawn graph. [4 marks] (b) Name any two types of diodes AND any two types of thyristors. [4 marks] (c) Find the following values for the periodic current output of a diode rectifier with square voltage input and resistive load. The output is shown in the figure below. (i) Average (ii) Root mean square (RMS) (ii) RMS of the 1st harmonic (iv) Total...
Q3 A MOSFET is used as a low-side switch to control a 15 2 resistive load...
Q3 A MOSFET is used as a low-side switch to control a 15 2 resistive load from a 24 V DC supply. The MOSFET has Rps,on = 0.2 and fon foff= 40 ns. [2] (a) Draw a suitable circuit. (b) Calculate both the drain current ip and drain-source voltage vps when the MOSFET is off and when it is on. [6] (c) Calculate the power dissipated in the load and in the MOSFET while they switched on. are [4] (d)...
A MOSFET and diode is used in a circuit shown in figure. The operating conditions are...
A MOSFET and diode is used in a circuit shown in figure. The operating conditions are as follows: Input Voltage = VIN = 42 V, Io = 5A. Switching frequency fs = 400 kHz, Duty-cycle = D = 0.3. Diode Forward Voltage drop = 0.7V. Diode Peak Reverse Recovery Current = IRRM = 2.5 A. ON-state resistance of the MOSFET is RDS (on) = 25 mΩ. VGG as a step voltage between 0V and 10 V. MOSFET timings – Td...
Please answer all the parts of the question clearly and fully! Thank you! Numerical Answers: (b)...
Please answer all the parts of the question clearly and fully!
Thank you!
Numerical Answers:
(b) (0.0 A, 24 V), (approximately 1.6 A, 0.32 V)
(c) 38.4 W, 0.5 W
(e) 0.26 W + 1.5 mW
SECTION B: Attempt any Two) questions 150 marks total! Q3 A MOSFET is used as a low-side switch to control a 15 2 resistive load from a 24 supply. The MOSFET has RDSan VDC 0.2 ? and ton-tof-40 ns. (a) Draw a suitable circuit....
Q1. (a) Draw the voltage-current characteristic curve of the GTO, and explain its operating principle. What...
Q1.
(a) Draw the voltage-current characteristic curve of the GTO, and
explain its operating principle. What are the typical ranges of the
turn off gain and the switching frequency of the GTO?
(b) MAX724 buck converter is shown in Figure Q1. The input
voltage is chosen as 25V, and the switching frequency is 100
?HZ.
(i) Calculate the duty cycle, peak-to-peak inductor ripple current,
and peak-to-peak output ripple voltage.
(ii) Calculate the minimal load current such that the inductor
current...
Buck Converter Question Q3. A Buck converter is used to produce a regulated 10V, 5A DC...
Buck Converter Question
Q3. A Buck converter is used to produce a regulated 10V, 5A DC power supply from a variable DC source with an nominal input voltage of Vin = 20V±5V. The Buck converter switches at 250kHz, and operates entirely in the continuous conduction mode. The output filter capacitance is C1.0uF 3.a. Draw the circuit topology for the Buck converter. Ensure that your circuit includes the input DC source, the output load resistance, the switching devices (i.e. MOSFET and...
4. A certain four-pole 240-V-rms 50-Hz delta-connected three-phase induction motor operates at slip 5% at full...
4. A certain four-pole 240-V-rms 50-Hz delta-connected three-phase induction motor operates at slip 5% at full load and has rotational losses (windage + friction) of 100 W. The stator resistance per phase is 0.2 Ohm. The results of no-load and locked-rotor tests on this motor are as follows: No-load test Locked-rotor test Line-to-line input voltage: 240 V 45 V Input active power: 1100 W 1300 W Input line current: 10 A 30 A Using the tests data, determine parameters of...
(i) (ii) Draw the structural diagram of a Gate Turn-Off (GTO) thyristor. [7%] Explain the operation...
(i) (ii) Draw the structural diagram of a Gate Turn-Off (GTO) thyristor. [7%] Explain the operation of GTO and clearly state the voltage and frequency range for its application [15%] State four advantages of GTOs when compared to conventional thyristors. (iii) [8%] (b) Consider the single-phase full bridge rectifier shown below where R=6 12, L = 6 mH, E = 60 V and the ac source voltage is 230 V, 50 Hz. * * 13 பண்பு 14* (i) For continuous...
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label the drawn graph. [4 marks] (b) Name any two types of diodes AND any two types of thyristors. [4 marks] (c) Find the following values for the periodic current output of a diode rectifier with square voltage input and resistive load. The output is shown in the figure below. (i) Average (ii) Root mean square (RMS) (ii) RMS of the 1st harmonic (iv) Total...
Draw a well-labelled circuit diagram of a Buck-Boost converter and draw the equivalent circuit diagrams for its two modes of operation (no waveforms). Label all circuits. [30%] With the help of the circuits in 2(a)(i), explain the working of a Buck-Boost converter. [20%] (ii) (b) Consider the following single-phase, half-wave rectifier circuit that is used to charge a battery through a resistor R. GO v, = Vm sin ot = (i) Prove that the average value of the charging current...
Question 1 (a) Draw the actual OR the idealized i-v characteristics of a MOSFET. Propery label the drawn graph. [4 marks] (b) Name any two types of diodes AND any two types of thyristors. [4 marks] (c) Find the following values for the periodic current output of a diode rectifier with square voltage input and resistive load. The output is shown in the figure below. (i) Average (ii) Root mean square (RMS) (ii) RMS of the 1st harmonic (iv) Total...
Q3 A MOSFET is used as a low-side switch to control a 15 2 resistive load from a 24 V DC supply. The MOSFET has Rps,on = 0.2 and fon foff= 40 ns. [2] (a) Draw a suitable circuit. (b) Calculate both the drain current ip and drain-source voltage vps when the MOSFET is off and when it is on. [6] (c) Calculate the power dissipated in the load and in the MOSFET while they switched on. are [4] (d)...
Please answer all the parts of the question clearly and fully!
Thank you!
Numerical Answers:
(b) (0.0 A, 24 V), (approximately 1.6 A, 0.32 V)
(c) 38.4 W, 0.5 W
(e) 0.26 W + 1.5 mW
SECTION B: Attempt any Two) questions 150 marks total! Q3 A MOSFET is used as a low-side switch to control a 15 2 resistive load from a 24 supply. The MOSFET has RDSan VDC 0.2 ? and ton-tof-40 ns. (a) Draw a suitable circuit....
Q1.
(a) Draw the voltage-current characteristic curve of the GTO, and
explain its operating principle. What are the typical ranges of the
turn off gain and the switching frequency of the GTO?
(b) MAX724 buck converter is shown in Figure Q1. The input
voltage is chosen as 25V, and the switching frequency is 100
?HZ.
(i) Calculate the duty cycle, peak-to-peak inductor ripple current,
and peak-to-peak output ripple voltage.
(ii) Calculate the minimal load current such that the inductor
current...
Buck Converter Question
Q3. A Buck converter is used to produce a regulated 10V, 5A DC power supply from a variable DC source with an nominal input voltage of Vin = 20V±5V. The Buck converter switches at 250kHz, and operates entirely in the continuous conduction mode. The output filter capacitance is C1.0uF 3.a. Draw the circuit topology for the Buck converter. Ensure that your circuit includes the input DC source, the output load resistance, the switching devices (i.e. MOSFET and...
(i) (ii) Draw the structural diagram of a Gate Turn-Off (GTO) thyristor. [7%] Explain the operation of GTO and clearly state the voltage and frequency range for its application [15%] State four advantages of GTOs when compared to conventional thyristors. (iii) [8%] (b) Consider the single-phase full bridge rectifier shown below where R=6 12, L = 6 mH, E = 60 V and the ac source voltage is 230 V, 50 Hz. * * 13 பண்பு 14* (i) For continuous...
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