EET 3222 lab 7

QUESTION 1 Design a high efficiency 3.3 V, 5A d.c.to d.c. power converter from a 4 to 5.5 Vdc source. The maximum allowable inductor current ripple and output voltage ripple are 0.1A and 20 mV, respectively. Assume a switching frequency of 20 kHz. a) Design a suitable converter power circuit using a MOSFET switch, showing all calculation of inductor and capacitor values and drawing a circuit diagram of the final design including component values. Indicate the peak inverse voltage and forward current rating of any diode required, and the maximum drain- source voltage of the MOSFET. b) On the Schematic diagram, draw the path of the current flow during the ON time and the OFF time. c) Describe the effect of changing the values of the inductor and the capacitor in the circuit. d) What is the effect of switching frequency in the circuit? e) Draw the schematic diagram of a circuit with the output voltage higher than the input voltage.

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Which of the following statements about bridge tip rectifiers is false? A) If the 1-phase type has source inductance, the average value of the output voltage is lower than in the absence of the inductance. B) The average output voltage value of the 1-phase type is 0.9 times the peak voltage of the network. C) none D) There are only odd harmonics in the current drawn by the 1-phase type from the mains. E) The average value of the output voltage of the 3-phase type is larger as the 3-phase and 1-phase types are compared

A Three Phase Uncontrolled Bridge Rectifier is operated from a three phase starconnected 210V, 60Hz ac supply through a star/star connected transformer.(i) Draw the circuit configuration.(ii) Draw the waveform of three phase secondary voltages showing conductiontimings of each individual diode, duration of each conduction sequence and outputvoltage during each sequence.(iii) Draw the output voltage waveform.(iv) Calculate the average output voltage.

A voltage, 100sin314t volts, is maintained across a circuit consisting of a half-waverectifier in series with a 50 ohm resistor. The resistance of the rectifier may beassumed to be negligible in the forward direction and infinity in the reverse direction.Calculate the average and r.m.s. values of the current.

Discuss the power electronic converters used in wind energy conversion. Also, explain the converter control

Q1. (a) A full wave rectifier is to be built using a transformer with a split secondary winding and other suitable components. Draw the circuit diagram of such a circuit and explain its operation by reference to both your circuit diagram and to suitable waveform diagrams. Note: that there is to be no smoothing of the load voltage.

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In a rectifier circuit , DC output voltage and RMS output voltage is  0.3 V & 0.48 V respectively. The form factor of this circuit is ___________________.

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Complete the table below using the attached circuit. Note: -When computing in half wave rectifier "J1 is ON".

High voltage

(b) Design a 20V D.C. power supply using full-wave rectifier(s), a transformer (220Vms, 50HZ) and a 470uF capacitor, supplying a resistor load of Ik2. Draw the circuit diagram • Sketch the output waveform Determine the transformer ratio • Determine the output voltage ripple

Example 1 Single phase diode bridge rectifier is connected to Vs Vm sin314t and unity transformer ratio to feed R. Determine (a) The rectification efficiency (b) Form Factor (c) Ripple factor (d) Peak inverse voltage (PIV) of the diode and (e) Crest factor of supply current. Example 2 Repeat example 1 with a center-tapped transformer and compare the results.

Q2/ Complete design an electronic circuit to produce negative full wave rectifier with increment center tap transformer to twice value if Vin = 50 sin wt (p.k.).

iii. For fully controlled single phase bridge rectifier with inductive load (load current is continuous) ,supply voltage 220 V(RMS) and a=30° .The mean value of output voltage is : (a) 150.32V (b) 171.52V (c) 120.98V

Don’t Copy Others work.  Here is only one question.  Don't say multiple question.  If you are not able to provide complete question answer kindly skip the question.       Sub: Optoelectronic  Dept: EEE

A load is connected in the Full Bridge rectifier circuit (Four Diodes). Usedtransformer primary voltage value is 220 V (rms). The transformer winding ratio is 1:10.Using the 0.7 V model of the diode,Load Value: Student No. Last 1 digit ( will be selected as kΩ, LastThose whose number is "0" get "9")a) How many % of conduction does each diode branch stay on?b) Find the average values ​​of the load voltage.c) Find the average values ​​of the load current.d) Find the effective value of the load voltage.e) Find the effective value of the load current.

Explain the working of single phase full converter for RLE load discontinous mode o operation with neat sketch, waveform and equations.

A single-phase bridge rectifier has a load of 10 Ohm and 2mll. The input AC of 220V (rms) @ 100Hz (sine wave) is applied. (a) Determine the RMS of the output voltage. (b) Determine the efficiency of the rectifier. (c) The Form Factor (FF) of the output voltage. (d) Determine the Ripple Factor (RF) of the output (e) Determine the Transformer Utilization Factor (TUF) of the circuit

Single-phase v(wt=250sin (314t) Each diode in a full-wave uncontrolled rectifier fed from a V-shaped source and feeding an R=10Ω load has a threshold voltage Vt=0.8V and an internal resistance rd=0.013Ω in the conduction direction of the diodes. voltage drop is about 1V in this case a) Maximum value of current through a diode? _____ Amps b) Average value of current flowing through a diode ______ Amperes c) Effective value of current flowing through a diode is ______ Amperes d) Conduction Loss _______ Watts for a diodee) Total Transmission Loss ______ Watts in the rectifier during a mains period

Electrical Engineering _ Power Electronics Notes: pls try to answer in less than 30 min.

Write a conclusion to the measured values from the 3 different rectifier circuit.

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a " zain IQ 45.PNG > Example 33: A thyristor used in a half wave rectifier used 220V. with firing angle 60° , total resistance load 1N , inductance 5mH and frequency 60HZ, calculate: (a) load voltage and current (b) maximum direct voltage and current (c) normalized voltage and current (d) root mean square voltage and current and (f) power factor.

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the three phase half wave uncontrolled rectifier is operated from 500v,50Hz supply at secondary side and the load resistance is 25 ohms. if the source inductance is negligible, determine a) rectification efficiency b) form factor  c) ripple factor d) transformer utilization factor e) peak inverse voltage of each diode

Question No. 2 a Inan experiment the voltage required for the device is 9V dc but unfortunately the transformer avai lable is of 220-6 V dc. Design a circuit which can power the device (use only methods that we have studied excluding Zener diode) b. Explain the behavior of the foll owing circuits if the input signal is triangular wave of peak voltage 5V and the biasing battery of 3V 4-

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