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For the 3ϕ full converter having resistive load, the ripple frequency f ripple is __________.
- a)300 Hz
- b)350 Hz
- c)250 Hz
- d)150 Hz
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
For the 3 full converter having resistive load, the ripple frequency f...
Concept:
Ripple Frequency: Ripple frequency is the output frequency of a converter which is some integral multiple of the supply frequency.
fripple= n × fs
fripple= Ripple frequency
fs = Supply frequency
n = No. of pulses in the time period
Ripple Frequency: Ripple frequency is the output frequency of a converter which is some integral multiple of the supply frequency.
fripple= n × fs
fripple= Ripple frequency
fs = Supply frequency
n = No. of pulses in the time period
Calculation:
The 3ϕ full converter has 6 no. of pulses in the time period of the output waveform.
fs = 50 Hz
fripple = 6 × 50
fripple = 300 Hz
The 3ϕ full converter has 6 no. of pulses in the time period of the output waveform.
fs = 50 Hz
fripple = 6 × 50
fripple = 300 Hz
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Community Answer
For the 3 full converter having resistive load, the ripple frequency f...
Full Converter with Resistive Load:
A full converter is a type of power electronic circuit that converts AC voltage to DC voltage using thyristors. It is commonly used in applications such as motor drives, power supplies, and battery charging.
In a full converter with a resistive load, the thyristors are controlled to provide a variable DC output voltage. The resistive load absorbs the power and maintains a constant load current. The operation of the full converter can be divided into four operating modes:
1. Mode 1: During this mode, the upper thyristor is ON and the lower thyristor is OFF. The input voltage is positive and the output voltage is negative, resulting in the flow of current through the upper thyristor and the load.
2. Mode 2: In this mode, both thyristors are OFF. The input voltage is negative and the output voltage is positive. No current flows through the circuit.
3. Mode 3: During this mode, the upper thyristor is OFF and the lower thyristor is ON. The input voltage is negative and the output voltage is negative, resulting in the flow of current through the lower thyristor and the load.
4. Mode 4: In this mode, both thyristors are OFF. The input voltage is positive and the output voltage is positive. No current flows through the circuit.
Ripple Frequency Calculation:
The ripple frequency, f_ripple, is the frequency at which the output voltage or current of the converter varies. It is determined by the switching frequency of the thyristors and the number of thyristor commutations per cycle.
In a full converter with resistive load, the thyristors switch twice per cycle. Therefore, the ripple frequency is given by:
f_ripple = 2 * f_switching
where f_switching is the switching frequency of the thyristors.
The correct answer is option 'A' (300 Hz) because the ripple frequency is twice the switching frequency, which is 150 Hz.
A full converter is a type of power electronic circuit that converts AC voltage to DC voltage using thyristors. It is commonly used in applications such as motor drives, power supplies, and battery charging.
In a full converter with a resistive load, the thyristors are controlled to provide a variable DC output voltage. The resistive load absorbs the power and maintains a constant load current. The operation of the full converter can be divided into four operating modes:
1. Mode 1: During this mode, the upper thyristor is ON and the lower thyristor is OFF. The input voltage is positive and the output voltage is negative, resulting in the flow of current through the upper thyristor and the load.
2. Mode 2: In this mode, both thyristors are OFF. The input voltage is negative and the output voltage is positive. No current flows through the circuit.
3. Mode 3: During this mode, the upper thyristor is OFF and the lower thyristor is ON. The input voltage is negative and the output voltage is negative, resulting in the flow of current through the lower thyristor and the load.
4. Mode 4: In this mode, both thyristors are OFF. The input voltage is positive and the output voltage is positive. No current flows through the circuit.
Ripple Frequency Calculation:
The ripple frequency, f_ripple, is the frequency at which the output voltage or current of the converter varies. It is determined by the switching frequency of the thyristors and the number of thyristor commutations per cycle.
In a full converter with resistive load, the thyristors switch twice per cycle. Therefore, the ripple frequency is given by:
f_ripple = 2 * f_switching
where f_switching is the switching frequency of the thyristors.
The correct answer is option 'A' (300 Hz) because the ripple frequency is twice the switching frequency, which is 150 Hz.
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