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In a 3 phase fully controlled converter the firing frequency is
- a)3 times the line frequency
- b)6 times the line frequency
- c)9 times the line frequency
- d)12 times the line frequency
Correct answer is option 'B'. Can you explain this answer?
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In a 3 phase fully controlled converter the firing frequency isa)3 tim...
It is a 6 pulse converter.
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Answer:
Firing Frequency in 3-phase Fully Controlled Converter
The firing frequency in a 3-phase fully controlled converter is the number of times that the thyristors are triggered per second. The firing frequency is dependent on the line frequency and the number of thyristors in the circuit.
Formula for Firing Frequency
The formula for firing frequency in a 3-phase fully controlled converter is given as:
Firing Frequency = 6 x Line Frequency
where Line Frequency is the frequency of the AC supply.
Explanation
The 3-phase fully controlled converter consists of six thyristors, which are arranged in a three-phase bridge configuration. The thyristors are triggered in pairs to control the flow of current through the load.
In a 3-phase system, the line voltage and current waveforms are sinusoidal and have a frequency of 50 Hz or 60 Hz, depending on the country. The thyristors are triggered at specific angles with respect to the line voltage waveform to control the power delivered to the load.
Since there are six thyristors in the circuit, each thyristor is triggered twice per cycle, once in the positive half cycle and once in the negative half cycle. Therefore, the firing frequency is six times the line frequency.
Conclusion
The firing frequency in a 3-phase fully controlled converter is six times the line frequency. This is because there are six thyristors in the circuit, and each thyristor is triggered twice per cycle. The firing frequency is an important parameter in controlling the power delivered to the load.
Firing Frequency in 3-phase Fully Controlled Converter
The firing frequency in a 3-phase fully controlled converter is the number of times that the thyristors are triggered per second. The firing frequency is dependent on the line frequency and the number of thyristors in the circuit.
Formula for Firing Frequency
The formula for firing frequency in a 3-phase fully controlled converter is given as:
Firing Frequency = 6 x Line Frequency
where Line Frequency is the frequency of the AC supply.
Explanation
The 3-phase fully controlled converter consists of six thyristors, which are arranged in a three-phase bridge configuration. The thyristors are triggered in pairs to control the flow of current through the load.
In a 3-phase system, the line voltage and current waveforms are sinusoidal and have a frequency of 50 Hz or 60 Hz, depending on the country. The thyristors are triggered at specific angles with respect to the line voltage waveform to control the power delivered to the load.
Since there are six thyristors in the circuit, each thyristor is triggered twice per cycle, once in the positive half cycle and once in the negative half cycle. Therefore, the firing frequency is six times the line frequency.
Conclusion
The firing frequency in a 3-phase fully controlled converter is six times the line frequency. This is because there are six thyristors in the circuit, and each thyristor is triggered twice per cycle. The firing frequency is an important parameter in controlling the power delivered to the load.
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In a 3 phase fully controlled converter the firing frequency isa)3 times the line frequencyb)6 times the line frequencyc)9 times the line frequencyd)12 times the line frequencyCorrect answer is option 'B'. Can you explain this answer?
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