Question
Download Solution PDFFor a 3-phase semi converter, if the firing angle for the thyristor is 90°, the free-wheeling diode will conduct for a period of ______,
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
- A 3ϕ semi converter works in a continuous mode of operation for α ≤ 60°
- In a continuous mode of operation, the free-wheeling diode does not conduct.
- For α > 60°, the mode of operation becomes discontinuous in nature.
- In a discontinuous mode of operation, the free-wheeling diode conducts for α - 60°.
Calculation:
Given, α = 90°
Conduction period of free-wheeling diode = 90° - 60°
Conduction period of free-wheeling diode = 30°
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