A transformer with the primary and secondary voltages of 120 and 60 voltages respectively, is connected to a bridge rectifier. The resistive load draws 2 amps. (a) (b) (c) (d) Draw the output voltage and the secondary's line current. Determine the average power dissipated at the load. Determine the apparent power delivered by the transformer's secondary side. Determine the supply power factor and the percentage of the total harmonic distortion.

5. For the transformer coupled half- wave rectifier circuit shown below: detei peak secondary voltage of the transformer 4:1 120V, 60H3 R. 2.5KL

3. A three phase bridge rectifier is supplied by 380 Volt line voltage through a Star/delta connected transformer of which turns ratio is 1. The firing delay angle is a=30° and the load is resistive R=2.2 Ohm. Draw the circuit diagram and mark the followings on this figure : average values of output voltage, the currents and voltages of each transformer leg.

In the full-wave rectifier circuit of figure, the transformer has a turns ratio of 1:2. The transformer primary winding is connected across an AC source of 230V (rms), 50 Hz. The load resistor is 50ohms. For this circuit, determine the peak-to- peak ripple in the output voltage * Di i v2 = VmSin ot RL Vs(N V1 Vo + V3 = VmSin ot D2 Full-wave rectifier- Circuit operation during positive half cycle 460 V 207 V 325.3 V None of the above ell ell

The main advantage of a bridge rectifier using tha same input transformer as a full-ave rectifier is that _______________. a) İt will double the output voltage. b) less current is required fort he diodes to conduct. c) the ripple frequency is twice that of the full wave rectifier. d) the ripple frequency is on-half that of the full wave rectifier.

The three-phase full-wave converter shown below is used to rectify the three phase (Y-connection) source signals. The six Thyristor are triggered in the sequence shown. Sketch for firing angle (a=90°) the output voltage (Vo), the phase current, the current for any two Thyristor in any one leg, and the load current (Ia). Then calculate (a) Thyristor average and r.m.s current. (b) Supply average and r.m.s current. (c) The normalized average output voltage. (d) The maximum output voltage. [Vdc = [1 - cos(60+ a)] Vml T If the line-to-neutral voltages are defined as 11 T, T T STA T. Load I sin od sin() ex-> Solve the question sin(with your own hands the corresponding line-to-line voltages are √31% sin (out + ) ---√(4)

Design a CT-FWR to supply a load of (50) with a waveform of the following specifications: -  Vdc = 12 V  Ripple factor = 0.1 %  the main power supply is (220 Vrms, 50 Hz). Determine the following values: - 1- The value of capacitor filter. 2- The maximum load voltage (VmR) 3- The transformer turns ratio (a). 4- The RMS value of the load voltage. 5- Draw the output waveform. (assume ideal diodes)

18. A dc-dc converter is to be built with the following specifications: Allowed dc input voltage range: +8 V to +18 V +24 V Output average voltage: Output voltage ripple: ±0.06 V maximum at rated load 300 W, resistive ±250 mA maximum at rated load 100 kHz Rated load: Input current ripple: Switching frequency: Common ground between input and output. a. Draw a circuit which can perform this function. b. What is the necessary range of duty ratio for each switch? c. Find circuit part values (R, L, and C) which will meet the stated specifications.