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A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current is
- a)100 Hz
- b)150 Hz
- c)250 Hz
- d)300 Hz
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
A six-pulse thyristor bridge rectifier is connected to a balanced thre...
The six-pulse thyristor bridge rectifier is a commonly used converter in power electronics. It consists of six thyristors arranged in a bridge configuration, which allows for the conversion of AC power to DC power. In this case, the rectifier is connected to a balanced three-phase, 50 Hz AC source.
The operation of the six-pulse thyristor bridge rectifier can be understood by considering the firing angles of the thyristors. The firing angle is the delay between the zero-crossing of the AC voltage waveform and the triggering of the thyristors. In a six-pulse rectifier, there are six thyristors, and they are triggered in pairs at different firing angles.
The lowest harmonic component in the AC input current of the rectifier is determined by the number of pulses in the rectifier. In this case, since we have a six-pulse rectifier, the lowest harmonic component will be the sixth harmonic, which is six times the fundamental frequency of the AC source.
To calculate the frequency of the lowest harmonic component, we can use the formula:
f_harmonic = n * f_source
where f_harmonic is the frequency of the harmonic component, n is the harmonic number, and f_source is the frequency of the AC source.
In this case, the harmonic number is 6 and the frequency of the AC source is 50 Hz. Substituting these values into the formula, we get:
f_harmonic = 6 * 50 = 300 Hz
Therefore, the lowest harmonic component in the AC input current of the rectifier is 300 Hz. Hence, the correct answer is option 'C'.
The operation of the six-pulse thyristor bridge rectifier can be understood by considering the firing angles of the thyristors. The firing angle is the delay between the zero-crossing of the AC voltage waveform and the triggering of the thyristors. In a six-pulse rectifier, there are six thyristors, and they are triggered in pairs at different firing angles.
The lowest harmonic component in the AC input current of the rectifier is determined by the number of pulses in the rectifier. In this case, since we have a six-pulse rectifier, the lowest harmonic component will be the sixth harmonic, which is six times the fundamental frequency of the AC source.
To calculate the frequency of the lowest harmonic component, we can use the formula:
f_harmonic = n * f_source
where f_harmonic is the frequency of the harmonic component, n is the harmonic number, and f_source is the frequency of the AC source.
In this case, the harmonic number is 6 and the frequency of the AC source is 50 Hz. Substituting these values into the formula, we get:
f_harmonic = 6 * 50 = 300 Hz
Therefore, the lowest harmonic component in the AC input current of the rectifier is 300 Hz. Hence, the correct answer is option 'C'.
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Community Answer
A six-pulse thyristor bridge rectifier is connected to a balanced thre...
In a six-pulse thyristor bridge rectifier, the harmonics present are = 6 k ± 1
So, the harmonics are = 5, 7, 11, 13, ...
lowest harmonic component = 5th harmonic supply frequency = 50 Hz
5th harmonic frequency = 5f = 250 Hz
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A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. Can you explain this answer?
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A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. 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 six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. 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 six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. Can you explain this answer?.
A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. 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 six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. 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 six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. Can you explain this answer?.
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A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current isa)100 Hzb)150 Hzc)250 Hzd)300 HzCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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