Please don't copy i need answer for my assignments. A 3-phase bridge inverter is operated from 200 V dc supply in 180° mode. Determine i) RMS value of line voltage ii) RMS value of fundamental component of line voltage .
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Please don't copy i need answer for my assignments.
A 3-phase bridge inverter is operated from 200 V dc supply in 180° mode. Determine
i) RMS value of line voltage
ii) RMS value of fundamental component of line voltage .
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- 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 50. i. Draw the waveforms output voltage, output current, source current, the thyristors currents (ir1,ir3,ir1 and ir3). 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.Question: In bridge type stepup cycloconverter during positive half cycle of supply voltage.'Ph' is positive with respect to 'N'. The circuit completes its path as Option 1: N- P2- load - P3 - Ph Option 2: Ph- P2- load - P3 N Option 3: N- P1- load - P2 Ph Option 4: Ph- P1- load- P2 N(b) A three-phase bridge inverter delivers power to a resistive load from a 350 V dc source. For a star connected load of 5 ohm per phase, determine for both (i) 180° mode (ii) 120° mode of operation: (i) average and rms value of load current (ii) average and rms value of thyristor current (ii) Three phase power dissipation (iv) First five harmonics in phase voltage
- #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?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/outputA 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.
- 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-, ECHOMEWORK 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 "bridge type" with input voltage and frequency 150V and 50Hz. respectively. The output frequency is 10Hz and the firing angle equal to 45". The load is resistance with the value of 10 in series with reactive inductance of the value of 20mH. Assume the extinction angle equal 180°. a. Draw the waveforms output voltage, output current, source current, the thyristors currents (ir1, ir3, ir1, andir 3) b. Calculate the rms of output voltage. c. The rms current of each thyristor. d. The input power factor
- 7. TY Hat CHICL Ans. 1. Iron los.........varies approximately as V². 2. Cu loss..........it also varies as ² but decreases with an increase in voltage if constant kVA output is assumed. 3. Efficiency...........for distribution transformers, efficiency at fractional loads decreases with in- crease in voltage while at full load or overload it increases with increase in voltage and vice- versa. 4. Regulation..........it varies as but decreases with increase in voltage if constant kVA output is assumed. 5. Heating.........for constant kVA output, iron temperatures increase whereas Cu temperatures decrease with increase in voltages and vice-versa. quems“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.What effects are produced by change in voltage? 1. Iron los..........varies approximately as V². 2. Cu loss..........it also varies as V² but decreases with an increase in voltage if constant kVA output is assumed. 3. Efficiency...........for distribution transformers, efficiency at fractional loads decreases with in- crease in voltage while at full load or overload it increases with increase in voltage and vice- versa. 4. Regulation..........it varies as but decreases with increase in voltage if constant kVA output is assumed. 5. Heating.........for constant kVA output, iron temperatures increase whereas Cu temperatures decrease with increase in voltages and vice-versa.