6.8. In a single-phase mid-point converter, turns ratio from primary to each secondary is 1.25. The source voltage is 230 V, 50 Hz. For a resistive load of R=22, determine (a) maximum value of average output voltage and load current and the corresponding firing and conduction angles, (b) maximum average and rms thyristor currents, (c) maximum possible values of positive and negative voltages across SCRs, (d) the value of a for load voltage of 100 V, (e) the value of voltage across SCR at the instant of commutation for a of part (d). Hint. (b) Maximum average thyristor current =; So 2n 0 [Ans. (a) 165.63 V, V. m R sin tot d(at) etc. 82.82 A, a-0°, y= 180° (b) 41.41 A, 65.054 A (c) 520.4 V. 520.4 V (d) 52,862° (e) 414.82 V]
6.8. In a single-phase mid-point converter, turns ratio from primary to each secondary is 1.25. The source voltage is 230 V, 50 Hz. For a resistive load of R=22, determine (a) maximum value of average output voltage and load current and the corresponding firing and conduction angles, (b) maximum average and rms thyristor currents, (c) maximum possible values of positive and negative voltages across SCRs, (d) the value of a for load voltage of 100 V, (e) the value of voltage across SCR at the instant of commutation for a of part (d). Hint. (b) Maximum average thyristor current =; So 2n 0 [Ans. (a) 165.63 V, V. m R sin tot d(at) etc. 82.82 A, a-0°, y= 180° (b) 41.41 A, 65.054 A (c) 520.4 V. 520.4 V (d) 52,862° (e) 414.82 V]
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![6.8. In a single-phase mid-point converter, turns ratio from primary to each secondary is 1.25. The
source voltage is 230 V, 50 Hz. For a resistive load of R = 2 2, determine
(a) maximum value of average output voltage and load current and the corresponding firing and
conduction angles,
(b) maximum average and rms thyristor currents,
(c) maximum possible values of positive and negative voltages across SCRs,
(d) the value of a for load voltage of 100 V,
(e) the value of voltage across SCR at the instant of commutation for a of part (d).
Hint. (b) Maximum average thyristor current =; So
2n 0
[Ans. (a) 165.63 V,
V.
m
R
sin o d(at) etc.
82.82 A, a=0°, y= 180° (b) 41.41 A, 65.054 A
(c) 520.4 V. 520.4 V (d) 52,862° (e) 414.82 V]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Faf2f083c-d3b9-4060-8e7f-6b21ba27d1df%2F2761d00c-8678-4807-bfa0-b713f4df0be2%2F9owq8jg_processed.png&w=3840&q=75)
Transcribed Image Text:6.8. In a single-phase mid-point converter, turns ratio from primary to each secondary is 1.25. The
source voltage is 230 V, 50 Hz. For a resistive load of R = 2 2, determine
(a) maximum value of average output voltage and load current and the corresponding firing and
conduction angles,
(b) maximum average and rms thyristor currents,
(c) maximum possible values of positive and negative voltages across SCRs,
(d) the value of a for load voltage of 100 V,
(e) the value of voltage across SCR at the instant of commutation for a of part (d).
Hint. (b) Maximum average thyristor current =; So
2n 0
[Ans. (a) 165.63 V,
V.
m
R
sin o d(at) etc.
82.82 A, a=0°, y= 180° (b) 41.41 A, 65.054 A
(c) 520.4 V. 520.4 V (d) 52,862° (e) 414.82 V]
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