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In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuous
- a)Does not depend on type of load and firing angle delay
- b)Depends both on the type of load and firing angle delay
- c)Depends only on the type of load
- d)Depends only on the firing angle delay
Correct answer is option 'B'. Can you explain this answer?
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In controlled rectifiers, the nature of load current, i.e. whether loa...
- In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuous depends both on the type of load and firing angle delay
- Highly inductive load makes load current continuous and ripple free
- The average load current supplied by a thyristor depends on firing angle
Most Upvoted Answer
In controlled rectifiers, the nature of load current, i.e. whether loa...
Controlled rectifiers are electronic devices that convert AC voltage to DC voltage with the help of thyristors or other semiconductor devices. The nature of load current in controlled rectifiers can be either continuous or discontinuous, depending on various factors. Let's understand this in detail.
Factors affecting the nature of load current:
1. Type of load: The nature of load current depends on the type of load connected to the controlled rectifier. There are two types of loads - resistive and inductive.
- Resistive load: In a resistive load, the load current is continuous, i.e. it flows continuously without any interruptions. This is because the load impedance is constant, and there is no energy storage in the load.
- Inductive load: In an inductive load, the load current is discontinuous, i.e. it flows in pulses and there are interruptions in between. This is because the inductive load stores energy in its magnetic field, which causes the current to rise slowly and fall quickly.
2. Firing angle delay: The nature of load current also depends on the firing angle delay, which is the delay between the triggering of the thyristor and the start of the conduction angle.
- Large firing angle delay: If the firing angle delay is large, the load current will be discontinuous, irrespective of the type of load. This is because the thyristor conducts for a shorter duration, and there are more interruptions in the load current.
- Small firing angle delay: If the firing angle delay is small, the load current will be continuous for a resistive load, but it may still be discontinuous for an inductive load. This is because the thyristor conducts for a longer duration, but the inductive load still causes interruptions in the current flow.
Conclusion:
Therefore, we can conclude that the nature of load current in controlled rectifiers depends on both the type of load and firing angle delay. For a resistive load, the load current is continuous, but for an inductive load, it is discontinuous. Moreover, even for a resistive load, if the firing angle delay is large, the load current will be discontinuous.
Factors affecting the nature of load current:
1. Type of load: The nature of load current depends on the type of load connected to the controlled rectifier. There are two types of loads - resistive and inductive.
- Resistive load: In a resistive load, the load current is continuous, i.e. it flows continuously without any interruptions. This is because the load impedance is constant, and there is no energy storage in the load.
- Inductive load: In an inductive load, the load current is discontinuous, i.e. it flows in pulses and there are interruptions in between. This is because the inductive load stores energy in its magnetic field, which causes the current to rise slowly and fall quickly.
2. Firing angle delay: The nature of load current also depends on the firing angle delay, which is the delay between the triggering of the thyristor and the start of the conduction angle.
- Large firing angle delay: If the firing angle delay is large, the load current will be discontinuous, irrespective of the type of load. This is because the thyristor conducts for a shorter duration, and there are more interruptions in the load current.
- Small firing angle delay: If the firing angle delay is small, the load current will be continuous for a resistive load, but it may still be discontinuous for an inductive load. This is because the thyristor conducts for a longer duration, but the inductive load still causes interruptions in the current flow.
Conclusion:
Therefore, we can conclude that the nature of load current in controlled rectifiers depends on both the type of load and firing angle delay. For a resistive load, the load current is continuous, but for an inductive load, it is discontinuous. Moreover, even for a resistive load, if the firing angle delay is large, the load current will be discontinuous.
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In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuousa)Does not depend on type of load and firing angle delayb)Depends both on the type of load and firing angle delayc)Depends only on the type of loadd)Depends only on the firing angle delayCorrect answer is option 'B'. Can you explain this answer?
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In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuousa)Does not depend on type of load and firing angle delayb)Depends both on the type of load and firing angle delayc)Depends only on the type of loadd)Depends only on the firing angle delayCorrect answer is option 'B'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuousa)Does not depend on type of load and firing angle delayb)Depends both on the type of load and firing angle delayc)Depends only on the type of loadd)Depends only on the firing angle delayCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuousa)Does not depend on type of load and firing angle delayb)Depends both on the type of load and firing angle delayc)Depends only on the type of loadd)Depends only on the firing angle delayCorrect answer is option 'B'. Can you explain this answer?.
In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuousa)Does not depend on type of load and firing angle delayb)Depends both on the type of load and firing angle delayc)Depends only on the type of loadd)Depends only on the firing angle delayCorrect answer is option 'B'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuousa)Does not depend on type of load and firing angle delayb)Depends both on the type of load and firing angle delayc)Depends only on the type of loadd)Depends only on the firing angle delayCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuousa)Does not depend on type of load and firing angle delayb)Depends both on the type of load and firing angle delayc)Depends only on the type of loadd)Depends only on the firing angle delayCorrect answer is option 'B'. Can you explain this answer?.
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