6. Which of the following converters is most suitable to control the speed of a DC motor of a trolleybus supplied by 600V DC mains? a) dual converter b) second-quadrant chopper converter c) controlled rectifier d) four-quadrant chopper converter
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- A single-phase full-wave controlled rectifier using center tap transformer is fed from a 220 V, 50 Hz ac source and it is connected a resistive load R= 20 Q. Determine (a) draw circuit diagram, (b) the output voltage and current, (c) form factor, (d) ripple factor, (e) efficiency. Consider delay angle is a = 45° and turn ratio of transformer is 5:1.How is the control of the Separately excited dc motor by single phase controlled rectifier ( thyristor) with equations3. A certain unfiltered center-tapped full wave rectifier is powered by a 120 Vrms ac power system and the turns ratio of the transformer is 6:1. Determine the following: RMS secondary voltage across one half of the transformer Peak secondary voltage a.
- a) It is important to manage heat dissipation for power control components such as Thyristor. Draw a typical heatsink for a semiconductor power device and the equivalent heat schematic. b) Explain the rate of change of voltage of a thyristor in relation to reverse-biased. c) Draw and explain how a 3-phase fully controlled converter operates.What are the advantages and disadvantages of using Flyback and Push-Pull Converters in electrical power applications?a. A 80 V rms is stepped down to 18V rms by a transformer. The output from the transformer is rectified using a half wave rectifier circuit and connected to a 47.5 2 load resistor. Draw a circuit diagram of this arrangement and the waveform at each stage.
- II. A center tapped full-wave rectifier circuit has the following specifications: ac supply line is 120 volts, RMS of the total secondary voltage is 80 volts and the load resistance is 10 ohms. Determine the following: (a) V,1 RMS, (b) V32 AVE, (c) Vo1 RMS and Vo2 AVE (d) I, RMS, (e) PLAVE, (f) turns ratio of the transformer1. A transformer has a turns ratio of 2:1. What is the peak secondary voltage if 115 V,ms applied to the primary winding? 2. Suppose line voltage may be as low as 105 Vrms or as high as 125 Vmsin a half-wave rectifier. With a 5:1 step-down transformer, what is the minimum peak load voltage? 3. What is the peak load voltage in a full-wave rectifier if the secondary voltage is 20 Vms? 4. We want a peak load voltage of 40 V out of a bridge rectifier. What is the approximate rms value of the secondary voltage? 5. What is the peak load voltage out of a bridge rectifier for a secondary voltage of 12.6 Vrms? (Use second approximation.) 6. If line frequency is 60 Hz, what is the output frequency of a half-wave rectifier? 7. If line frequency is 60 Hz, what is the output frequency of a bridge rectifier? 8. If the load current is 5 mA and the filter is capacitance is 1000 F, what is the peak-to-peak ripple out of a bridge rectifier? 9. The diodes in a bridge rectifier each have a maximum dc…help me in these questions pls write the questions with the and by (Computer) 1-Which of the following statements INCORRECTLY explain the label in the figure about LVDT working principles? a. Secondary coils are connected in series in such a way that their output is opposing each other. b. Constant DC voltage input to primary coil. c. Displacement moves ferrous rod from central position. d. The difference of the output voltage between the two secondary voltage.==========2- Explain the working principle of the measurement system in the figure below.i. Force input that is supplied to the sensor is processed to give the response in the form of raw output signal.ii. Signal conditioner manipulated the weak signal to give a conditioned input.iii. Analog or digital indicator display the unit that gives output reading of quantity being measured.iv. Measured value is compared with the input value for further action. a. ii, iii and iv only. b. i, ii and iv only. c. i, ii and…
- A three phase full wave rectifier is shown below along with the peak input phase voltage Vm=169.7V. The load is purely resistive. The rectifier delivers Ipc = 100 A and the source frequency is 60 Hz. The DC output voltage is Vpc=280.7V and. The RMS transformer secondary current is equal to 81.72A, the output RMS voltage is equal to VRMS=280.93V and the output resistance is equal to 2.8070. The TUF would be equal to: Secondary a平a字a辛 R 太D。太D。太D. Select one: 0.875 Ob. 0.955 O C. 0.551 O d. 0.432 Compared with power transistors, thyristors have the following characteristic! Required information Problem 03.093- The dc output voltage in the half wave rectifier The half-wave rectifier in the figure given below is operating at a frequency of 60 Hz, and the rms value of the transformer output voltage is 19.6 V ± 10%. Assume the value of R to be infinite. ли D₁ CR Problem 03.093.a - The dc output voltage in the half wave rectifier Calculate the nominal value of the dc output voltage Vo if the diode voltage drop is 1 V. (Round the final answer to one decimal place and Include a minus sign if necessary) The nominal value of the dc output voltage Vois 29.5 V AURA T 5 + VO Q Search 6 P & 7 A S Po JA RA 120 Vp is applied to the primary coil of a center-tap transformer of turn ratio (n1 : n2 = 6: 2) . If the secondary coils are connected to a Ge diodes center-tap full wave rectifier, the output DC voltage is about __________. *1- 13.42 V2- 14.15 V3- 15.58 V4-12.54 V5- 16.23 V