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A phase-controlled, single-phase, full-bridge converter is supplying a highly inductive DC load. The converter is fed from a 230 V, 50 Hz, AC source. The fundamental frequency in Hz of the voltage ripple on the DC side is
- a)25
- b)50
- c)100
- d)300
Correct answer is option 'C'. Can you explain this answer?
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Explanation:
A single-phase, full-bridge converter consists of four diodes and four switches. It is used to convert AC voltage to DC voltage. The converter operates by switching the four switches in a sequence that results in a DC voltage output. The converter can be controlled by varying the switching frequency, duty cycle, or phase angle.
In this case, the converter is phase-controlled, which means that the phase angle between the AC source voltage and the converter switching signal is varied to control the output voltage. The load is highly inductive, which means that it has a high reactance and a low resistance.
The voltage ripple on the DC side of the converter is caused by the switching action of the converter. The ripple frequency is related to the switching frequency and the number of phases of the converter. In this case, the converter is single-phase, which means that there is only one phase of switching. The fundamental frequency of the ripple is therefore equal to the switching frequency.
The switching frequency of the converter is determined by the phase angle between the AC source voltage and the switching signal. The maximum switching frequency is 100 Hz, which is the frequency of the AC source voltage. However, the converter is phase-controlled, which means that the phase angle can be adjusted to lower the switching frequency. The minimum switching frequency is zero, which means that the converter is not switching.
The fundamental frequency of the ripple on the DC side of the converter is therefore equal to the switching frequency. In this case, the correct answer is option C, which is 100 Hz.
A single-phase, full-bridge converter consists of four diodes and four switches. It is used to convert AC voltage to DC voltage. The converter operates by switching the four switches in a sequence that results in a DC voltage output. The converter can be controlled by varying the switching frequency, duty cycle, or phase angle.
In this case, the converter is phase-controlled, which means that the phase angle between the AC source voltage and the converter switching signal is varied to control the output voltage. The load is highly inductive, which means that it has a high reactance and a low resistance.
The voltage ripple on the DC side of the converter is caused by the switching action of the converter. The ripple frequency is related to the switching frequency and the number of phases of the converter. In this case, the converter is single-phase, which means that there is only one phase of switching. The fundamental frequency of the ripple is therefore equal to the switching frequency.
The switching frequency of the converter is determined by the phase angle between the AC source voltage and the switching signal. The maximum switching frequency is 100 Hz, which is the frequency of the AC source voltage. However, the converter is phase-controlled, which means that the phase angle can be adjusted to lower the switching frequency. The minimum switching frequency is zero, which means that the converter is not switching.
The fundamental frequency of the ripple on the DC side of the converter is therefore equal to the switching frequency. In this case, the correct answer is option C, which is 100 Hz.
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A phase-controlled, single-phase, full-bridge converter is supplying a highly inductive DC load. The converter is fed from a 230 V, 50 Hz, AC source. The fundamental frequency in Hz of the voltage ripple on the DC side isa)25b)50c)100d)300Correct answer is option 'C'. Can you explain this answer?
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