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In a single phase, full wave bridge circuit and in three phase, delta full wave bridge circuit, the ripple voltage frequency is always
- a)Twice the line frequency, six times the line frequency
- b)Both will be twice the line frequency
- c)Both will be six times the lines frequency
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
In a single phase, full wave bridge circuit and in three phase, delta ...
Ripple voltage is the fluctuation in the output voltage of a rectifier circuit and is typically caused by the charging and discharging of the filter capacitor. In a single phase, full wave bridge circuit and in a three-phase, delta full wave bridge circuit, the ripple voltage frequency is always twice the line frequency.
Here is a detailed explanation:
1. Single Phase, Full Wave Bridge Circuit:
- In a single phase, full wave bridge circuit, the input AC voltage is converted into a pulsating DC voltage using four diodes arranged in a bridge configuration.
- The diodes conduct alternately during positive and negative half cycles of the AC voltage, allowing current to flow through the load in the same direction.
- The output of the bridge circuit is a series of pulses, where each pulse corresponds to a half cycle of the input AC voltage.
- The ripple voltage is the variation between the maximum and minimum voltage levels of these pulses.
- The ripple voltage frequency is determined by the number of pulses per second, which is twice the line frequency.
- This is because each AC cycle results in two pulses, one during the positive half cycle and one during the negative half cycle.
2. Three Phase, Delta Full Wave Bridge Circuit:
- In a three-phase, delta full wave bridge circuit, three single phase bridge circuits are connected in a delta configuration.
- Each single phase bridge circuit operates on one phase of the three-phase AC supply.
- The output of each single phase bridge circuit is a series of pulses, similar to the single phase bridge circuit.
- However, in a three-phase circuit, the pulses from each phase are combined to provide a smoother DC output.
- The ripple voltage frequency is still determined by the number of pulses per second, which is twice the line frequency.
- This is because each AC cycle in each phase results in two pulses, one during the positive half cycle and one during the negative half cycle.
- Since there are three phases, the total number of pulses per second is three times the number of pulses per phase, resulting in a ripple voltage frequency that is still twice the line frequency.
In conclusion, the ripple voltage frequency in both a single phase, full wave bridge circuit and a three-phase, delta full wave bridge circuit is always twice the line frequency.
Here is a detailed explanation:
1. Single Phase, Full Wave Bridge Circuit:
- In a single phase, full wave bridge circuit, the input AC voltage is converted into a pulsating DC voltage using four diodes arranged in a bridge configuration.
- The diodes conduct alternately during positive and negative half cycles of the AC voltage, allowing current to flow through the load in the same direction.
- The output of the bridge circuit is a series of pulses, where each pulse corresponds to a half cycle of the input AC voltage.
- The ripple voltage is the variation between the maximum and minimum voltage levels of these pulses.
- The ripple voltage frequency is determined by the number of pulses per second, which is twice the line frequency.
- This is because each AC cycle results in two pulses, one during the positive half cycle and one during the negative half cycle.
2. Three Phase, Delta Full Wave Bridge Circuit:
- In a three-phase, delta full wave bridge circuit, three single phase bridge circuits are connected in a delta configuration.
- Each single phase bridge circuit operates on one phase of the three-phase AC supply.
- The output of each single phase bridge circuit is a series of pulses, similar to the single phase bridge circuit.
- However, in a three-phase circuit, the pulses from each phase are combined to provide a smoother DC output.
- The ripple voltage frequency is still determined by the number of pulses per second, which is twice the line frequency.
- This is because each AC cycle in each phase results in two pulses, one during the positive half cycle and one during the negative half cycle.
- Since there are three phases, the total number of pulses per second is three times the number of pulses per phase, resulting in a ripple voltage frequency that is still twice the line frequency.
In conclusion, the ripple voltage frequency in both a single phase, full wave bridge circuit and a three-phase, delta full wave bridge circuit is always twice the line frequency.
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Community Answer
In a single phase, full wave bridge circuit and in three phase, delta ...
Ripple voltage is the small AC component present in the output of a rectifier circuit. It is caused by the incomplete suppression of the AC input voltage during the rectification process. In a single-phase, full-wave bridge circuit and a three-phase, delta full-wave bridge circuit, the ripple voltage frequency is always twice the line frequency and six times the line frequency, respectively.
1. Single-phase, full-wave bridge circuit:
- In a single-phase, full-wave bridge circuit, four diodes are connected in a bridge configuration to rectify the AC input voltage.
- During the positive half-cycle of the input voltage, diodes D1 and D3 conduct, allowing current to flow through the load.
- During the negative half-cycle, diodes D2 and D4 conduct, again allowing current to flow through the load, but in the opposite direction.
- This configuration ensures that the load receives current during both half-cycles of the input voltage, resulting in full-wave rectification.
- However, due to the non-ideal nature of diodes, there is still a small AC component present in the output, known as the ripple voltage.
- The ripple voltage frequency is twice the line frequency because it is caused by the switching of diodes during each half-cycle of the input voltage.
2. Three-phase, delta full-wave bridge circuit:
- In a three-phase, delta full-wave bridge circuit, six diodes are connected in a bridge configuration to rectify the three-phase AC input voltage.
- Each phase of the input voltage is connected to two diodes in such a way that during one half-cycle of each phase, one set of diodes conducts, and during the other half-cycle, the other set of diodes conducts.
- This configuration ensures that the load receives current during all three phases of the input voltage, resulting in full-wave rectification.
- Similar to the single-phase circuit, the non-ideal nature of diodes results in the presence of a ripple voltage in the output.
- The ripple voltage frequency in a three-phase, delta full-wave bridge circuit is six times the line frequency because it is caused by the switching of diodes during each half-cycle of each phase of the input voltage.
In summary, the ripple voltage frequency is twice the line frequency in a single-phase, full-wave bridge circuit, and six times the line frequency in a three-phase, delta full-wave bridge circuit.
1. Single-phase, full-wave bridge circuit:
- In a single-phase, full-wave bridge circuit, four diodes are connected in a bridge configuration to rectify the AC input voltage.
- During the positive half-cycle of the input voltage, diodes D1 and D3 conduct, allowing current to flow through the load.
- During the negative half-cycle, diodes D2 and D4 conduct, again allowing current to flow through the load, but in the opposite direction.
- This configuration ensures that the load receives current during both half-cycles of the input voltage, resulting in full-wave rectification.
- However, due to the non-ideal nature of diodes, there is still a small AC component present in the output, known as the ripple voltage.
- The ripple voltage frequency is twice the line frequency because it is caused by the switching of diodes during each half-cycle of the input voltage.
2. Three-phase, delta full-wave bridge circuit:
- In a three-phase, delta full-wave bridge circuit, six diodes are connected in a bridge configuration to rectify the three-phase AC input voltage.
- Each phase of the input voltage is connected to two diodes in such a way that during one half-cycle of each phase, one set of diodes conducts, and during the other half-cycle, the other set of diodes conducts.
- This configuration ensures that the load receives current during all three phases of the input voltage, resulting in full-wave rectification.
- Similar to the single-phase circuit, the non-ideal nature of diodes results in the presence of a ripple voltage in the output.
- The ripple voltage frequency in a three-phase, delta full-wave bridge circuit is six times the line frequency because it is caused by the switching of diodes during each half-cycle of each phase of the input voltage.
In summary, the ripple voltage frequency is twice the line frequency in a single-phase, full-wave bridge circuit, and six times the line frequency in a three-phase, delta full-wave bridge circuit.
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In a single phase, full wave bridge circuit and in three phase, delta full wave bridge circuit, the ripple voltage frequency is alwaysa)Twice the line frequency, six times the line frequencyb)Both will be twice the line frequencyc)Both will be six times the lines frequencyd)None of theseCorrect answer is option 'A'. Can you explain this answer?
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