Inverters are having following properties: A. VSI uses force commutation B. VSI has negligible impedance C. VSI has large source impedances D. They work like choppers Choose the correct answer from the options given below:
A and B only
To solve this question, we need to analyze the properties associated with Voltage Source Inverters (VSI) and identify which statements are true.
- VSI uses force commutation:
- Force commutation refers to the process where external circuit components are used to turn off the SCRs (silicon-controlled rectifiers) or other switching devices. In VSIs, force commutation is indeed used. Hence, this statement is correct.
- VSI has negligible impedance:
- VSIs are designed to behave like ideal voltage sources with very low internal impedance. This enables them to maintain a constant output voltage regardless of load variations. Thus, this statement is also correct.
- VSI has large source impedances:
- This statement is incorrect because it contradicts the previous point. Voltage source inverters are meant to have negligible impedance to function correctly.
- They work like choppers:
- While voltage source inverters do convert DC to AC, suggesting they work like choppers is a bit misleading. Choppers are typically DC to DC converters. Thus, this statement may not accurately describe all facets of VSIs but could be loosely interpreted in some contexts as they perform on-off switching as part of their functions.
Based on the analysis above, the correct statements about the properties of VSIs are:
- A. VSI uses force commutation
- B. VSI has negligible impedance
Therefore, the correct answer is A and B only.
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In 60‐degrees PWM inverter power supply,
A. Power devices are made 'ON' for 1/3 of the cycle.
B. Power devices are made 'OFF' for 1/3 of the cycle.
C. The phase voltage = 0.57735 V supply .
D. Line voltage = V supply .
E. Line voltage < V supply .
Choose the correct answer from the options given below:
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Find the value of inductance in a series inverter circuit having the frequency of 5 kHz and a capacitance μF. If the inverter is operating under resonance condition. The value of inductance is given by:
