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Assertion (A): The terminal voltage of a voltage source inverter remains substantially constant with variations in load.
Reason (R): Any short-circuit across the terminals of a voltage source inverter causes current to rise very fast.
Reason (R): Any short-circuit across the terminals of a voltage source inverter causes current to rise very fast.
- a)Both A and R are true and R is the correct explanation of A
- b)Both A and R are true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Assertion (A): The terminal voltage of a voltage source inverter remai...
A voltage source inverter is one in which the d.c. source has small or negligible impedance. Due to low internal impedance, the terminal voltage of a VSI remains substantially constant with variations in load. Reason is also a correct -statement because due to low time constant of internal impedance any short-circuit across the terminals of a VSI causes current to rise very fast. Hence, both assertion and reason are true but reason is not the correct explanation of assertion.
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Assertion (A): The terminal voltage of a voltage source inverter remai...
Explanation:
The correct answer is option 'B': Both A and R are true but R is not the correct explanation of A.
Assertion (A): The terminal voltage of a voltage source inverter remains substantially constant with variations in load.
Reason (R): Any short-circuit across the terminals of a voltage source inverter causes current to rise very fast.
Explanation:
Terminal Voltage of a Voltage Source Inverter:
- A voltage source inverter (VSI) is an electronic device that converts a DC voltage source into an AC voltage source.
- The terminal voltage of a VSI refers to the voltage across the output terminals of the inverter.
- Ideally, the terminal voltage of a VSI should remain constant with variations in load.
Reason Explanation:
- The reason states that any short-circuit across the terminals of a VSI causes current to rise very fast.
- This statement is true because in a short-circuit condition, the impedance across the terminals becomes very low, resulting in a high current flow.
- However, this reason does not directly explain why the terminal voltage of a VSI remains constant with load variations.
Explanation of Assertion:
- The assertion states that the terminal voltage of a VSI remains substantially constant with variations in load.
- This assertion is true because VSIs are designed to regulate the output voltage regardless of the load variations.
- VSIs achieve this regulation by using control techniques such as pulse width modulation (PWM).
- PWM adjusts the width of the output pulses based on the load requirements, ensuring that the average output voltage remains constant.
Conclusion:
- Both the assertion and reason are true.
- However, the reason does not provide a correct explanation for the assertion.
- The terminal voltage of a VSI remains constant with variations in load due to the control techniques used, not solely because of the potential of a short-circuit.
The correct answer is option 'B': Both A and R are true but R is not the correct explanation of A.
Assertion (A): The terminal voltage of a voltage source inverter remains substantially constant with variations in load.
Reason (R): Any short-circuit across the terminals of a voltage source inverter causes current to rise very fast.
Explanation:
Terminal Voltage of a Voltage Source Inverter:
- A voltage source inverter (VSI) is an electronic device that converts a DC voltage source into an AC voltage source.
- The terminal voltage of a VSI refers to the voltage across the output terminals of the inverter.
- Ideally, the terminal voltage of a VSI should remain constant with variations in load.
Reason Explanation:
- The reason states that any short-circuit across the terminals of a VSI causes current to rise very fast.
- This statement is true because in a short-circuit condition, the impedance across the terminals becomes very low, resulting in a high current flow.
- However, this reason does not directly explain why the terminal voltage of a VSI remains constant with load variations.
Explanation of Assertion:
- The assertion states that the terminal voltage of a VSI remains substantially constant with variations in load.
- This assertion is true because VSIs are designed to regulate the output voltage regardless of the load variations.
- VSIs achieve this regulation by using control techniques such as pulse width modulation (PWM).
- PWM adjusts the width of the output pulses based on the load requirements, ensuring that the average output voltage remains constant.
Conclusion:
- Both the assertion and reason are true.
- However, the reason does not provide a correct explanation for the assertion.
- The terminal voltage of a VSI remains constant with variations in load due to the control techniques used, not solely because of the potential of a short-circuit.
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