(i) A Three phase inverter is connected from 210 V , DC supply and operated in 120 mode . Find the following parameters (a) line voltage
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- 2. A single-phase to single-phase cycloconverter "bridge type" with input voltage and frequency 150V and 60Hz respectively. The output frequency is 15Hz and the firing angle equal to 90°. The load is resistance with the value of 500. i. Draw the waveforms output voltage, output current, source current, the thyristors currents (iT, IT, IT and in). a. Calculate the rms of output voltage. b. Calculate the rms of output current and thyristor current. ii. If the firing angles of thyristors "with different firing angles technique". Draw the complete waveforms and comment on the results.#4 the input voltage of a three phase inverter is 600Vdc, what is the duty cycle for phase a as a function of time to generate 270cos(ot)V phase voltage? #5 how to generate 460V 400HZ three phase voltages from 460V 60HZ three phase voltage?Three phase inverter is connected from 205 V , DC supply and operated in 120 ° mode . Find the following parameters a) Compare the operation with 180 mode
- In AC regulator, compare between the (a) resistive and electronic voltage control, (b) On-off and Phase control. Write the needs of cycloconverter with example.4. In three phase Cycloconverter, the reduction factor is given by frequency) / 8 frequency) frequency) / 6 frequency)/3 a) (input frequency/output b) (input frequency/output c) (input frequency/output d) (input frequency/output“Electronic regulators are better than resistive ones in many aspects to control AC power” – explain with suitable examples and aspects. Out of on-off and phase control used in AC regulator, describe which one is better and why. Define a cycloconverter and write its application areas.
- HOMEWORK 2.3 The input voltage to the single-phase to single-phase cycloconverter is 120V(rms), 60Hz.The load resistance is 502 and the load inductance is L= 40 mH. The frequency of the output voltage is 20 Hz. If the converter is operating with a delay angle Up-2n/3, (a) Sketch the cicuit of the converter. (b) Sketch the output voltage waveform, (c) determine the rms value of the output voltage. (d) determine the rms current of the load. (e) determine the input power factor of the converter.A single-phase to single-phase cycloconverter is supplying and inductive load comprising of a resistance of 52 and an inductance of 40 mH from a 230 V, 60 Hz single-phase supply. If the output frequency is 20 Hz and firing delay angle ap = 120°. Neglecting the harmonic content of load voltage, (a) Explain the Working of the converter (b) Determine the output rms value of output voltage. (c) Rms current of each thyristor. (d) input power factor.A lossless single phase inverter is connected to AC bus. The real power of AC load is 20 kW and the AC generator nominal power is 12 kW. The efficiency of inverter is 95%. Calculate the required power from inverter. Compute the reactive power of the inverter. The inverter volage is 232 V and the generatorvoltage is 230 V. The decoupling reactance is 0.5 ohm.
- q6/ Complete the blank In AC-DC power transmission system, ............................................. is used to convert the DC supply into AC supply.g- In a single-phase full converter, for discontinuous load current and angle ß > π, each SCR conducts for .............. 1- α, 2- ß-a, 3-B, 4- a+ß 5- None of previous. i- The number of thyristors required for three phase to three-phase 3-pulse type cycloconverter are ........... respectively 1-6, 2-12, 3-18, 4-36, 5-24. The peak voltage of UJT is ........... 1-VB2B1, 2- VB2B1+0.6, 3- VB2B1+0.6, 4-VB2B1, 5-None of previous. j- K The time available to turn-off thyristor in load-commutated chopper is 3- 2E2Cf, 4-E²C, 5- None of previous. 10 lo 2EC 1-2, 2-, ECi. Draw the block diagram of CRO with indication of each part ii. What are the advantages of Auto-transformer iii. What are the advantages and disadvantages of themistors?