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A 3-phase bridge inverter delivers power to a resistive load from a 450 V DC source. For a star connected load of 10Ω per phase. Assuming 1800 conduction mode,then which of the following statement(s) is/are correct?
- a)Average value of thyristor current is 10 A.
- b)RMS value of thyristor current is 15 A.
- c)RMS value of thyristor current is 30 A.
- d)Average value of thyristor current is 20 A.
Correct answer is option 'A,B'. Can you explain this answer?
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A 3-phase bridge inverter delivers power to a resistive load from a 4...
In 1800 conduction mode each thyristor conduct for 1800 duration.
For 1800 conduction mode the waveform of thyristor current is given below,
RMS value of thyristor current is given by,
Average value of thyristor current is given by,
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A 3-phase bridge inverter delivers power to a resistive load from a 4...
Given data:
- DC source voltage (Vdc) = 450 V
- Load resistance per phase (R) = 10 Ω
- Conduction mode = 1800
In a 3-phase bridge inverter, each phase consists of two thyristors (SCRs) connected in antiparallel. The thyristor current waveform is continuous and non-sinusoidal.
Average value of thyristor current (Iavg):
- The average value of thyristor current can be calculated using the formula: Iavg = (Vdc)/(√3 * R)
- Substituting the given values, Iavg = (450)/(√3 * 10) = 7.745 A
RMS value of thyristor current (Irms):
- The RMS value of thyristor current can be calculated using the formula: Irms = Iavg * √(1 + (1/(3 * sin²(180/Conduction mode))))
- Substituting the given values, Irms = 7.745 * √(1 + (1/(3 * sin²(180/1800)))) = 14.969 A
Analysis of each option:
a) Average value of thyristor current is 10 A:
- The calculated average value of thyristor current is 7.745 A, which is not equal to 10 A. Therefore, option 'a' is incorrect.
b) RMS value of thyristor current is 15 A:
- The calculated RMS value of thyristor current is 14.969 A, which is approximately equal to 15 A. Therefore, option 'b' is correct.
c) RMS value of thyristor current is 30 A:
- The calculated RMS value of thyristor current is 14.969 A, which is not equal to 30 A. Therefore, option 'c' is incorrect.
d) Average value of thyristor current is 20 A:
- The calculated average value of thyristor current is 7.745 A, which is not equal to 20 A. Therefore, option 'd' is incorrect.
In conclusion, the correct statements are:
- Average value of thyristor current is 10 A (incorrect)
- RMS value of thyristor current is 15 A (correct)
- DC source voltage (Vdc) = 450 V
- Load resistance per phase (R) = 10 Ω
- Conduction mode = 1800
In a 3-phase bridge inverter, each phase consists of two thyristors (SCRs) connected in antiparallel. The thyristor current waveform is continuous and non-sinusoidal.
Average value of thyristor current (Iavg):
- The average value of thyristor current can be calculated using the formula: Iavg = (Vdc)/(√3 * R)
- Substituting the given values, Iavg = (450)/(√3 * 10) = 7.745 A
RMS value of thyristor current (Irms):
- The RMS value of thyristor current can be calculated using the formula: Irms = Iavg * √(1 + (1/(3 * sin²(180/Conduction mode))))
- Substituting the given values, Irms = 7.745 * √(1 + (1/(3 * sin²(180/1800)))) = 14.969 A
Analysis of each option:
a) Average value of thyristor current is 10 A:
- The calculated average value of thyristor current is 7.745 A, which is not equal to 10 A. Therefore, option 'a' is incorrect.
b) RMS value of thyristor current is 15 A:
- The calculated RMS value of thyristor current is 14.969 A, which is approximately equal to 15 A. Therefore, option 'b' is correct.
c) RMS value of thyristor current is 30 A:
- The calculated RMS value of thyristor current is 14.969 A, which is not equal to 30 A. Therefore, option 'c' is incorrect.
d) Average value of thyristor current is 20 A:
- The calculated average value of thyristor current is 7.745 A, which is not equal to 20 A. Therefore, option 'd' is incorrect.
In conclusion, the correct statements are:
- Average value of thyristor current is 10 A (incorrect)
- RMS value of thyristor current is 15 A (correct)
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A 3-phase bridge inverter delivers power to a resistive load from a 450 V DC source. For a star connected load of 10Ω per phase. Assuming 1800 conduction mode,then which of the following statement(s) is/are correct?a)Average value of thyristor current is 10 A.b)RMS value of thyristor current is 15 A.c)RMS value of thyristor current is 30 A.d)Average value of thyristor current is 20 A.Correct answer is option 'A,B'. Can you explain this answer?
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A 3-phase bridge inverter delivers power to a resistive load from a 450 V DC source. For a star connected load of 10Ω per phase. Assuming 1800 conduction mode,then which of the following statement(s) is/are correct?a)Average value of thyristor current is 10 A.b)RMS value of thyristor current is 15 A.c)RMS value of thyristor current is 30 A.d)Average value of thyristor current is 20 A.Correct answer is option 'A,B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 3-phase bridge inverter delivers power to a resistive load from a 450 V DC source. For a star connected load of 10Ω per phase. Assuming 1800 conduction mode,then which of the following statement(s) is/are correct?a)Average value of thyristor current is 10 A.b)RMS value of thyristor current is 15 A.c)RMS value of thyristor current is 30 A.d)Average value of thyristor current is 20 A.Correct answer is option 'A,B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 3-phase bridge inverter delivers power to a resistive load from a 450 V DC source. For a star connected load of 10Ω per phase. Assuming 1800 conduction mode,then which of the following statement(s) is/are correct?a)Average value of thyristor current is 10 A.b)RMS value of thyristor current is 15 A.c)RMS value of thyristor current is 30 A.d)Average value of thyristor current is 20 A.Correct answer is option 'A,B'. Can you explain this answer?.
A 3-phase bridge inverter delivers power to a resistive load from a 450 V DC source. For a star connected load of 10Ω per phase. Assuming 1800 conduction mode,then which of the following statement(s) is/are correct?a)Average value of thyristor current is 10 A.b)RMS value of thyristor current is 15 A.c)RMS value of thyristor current is 30 A.d)Average value of thyristor current is 20 A.Correct answer is option 'A,B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 3-phase bridge inverter delivers power to a resistive load from a 450 V DC source. For a star connected load of 10Ω per phase. Assuming 1800 conduction mode,then which of the following statement(s) is/are correct?a)Average value of thyristor current is 10 A.b)RMS value of thyristor current is 15 A.c)RMS value of thyristor current is 30 A.d)Average value of thyristor current is 20 A.Correct answer is option 'A,B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 3-phase bridge inverter delivers power to a resistive load from a 450 V DC source. For a star connected load of 10Ω per phase. Assuming 1800 conduction mode,then which of the following statement(s) is/are correct?a)Average value of thyristor current is 10 A.b)RMS value of thyristor current is 15 A.c)RMS value of thyristor current is 30 A.d)Average value of thyristor current is 20 A.Correct answer is option 'A,B'. Can you explain this answer?.
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