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400 V rated 5 SCRs are connected in series. The operation voltage of the string is 500. Calculate the string efficiency.(a) 25 %(b) 40 %(c) 38 %(d) 35 %This question was posed to me during a job interview.The origin of the question is Solid-State Devices in section Introduction to Solid-State Devices of Electric Drives |
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Answer» RIGHT choice is (a) 25 % Best explanation: The string efficiency can be calculated using the formula OPERATION VOLTAGE÷(Number of SCRs×Rated voltage) = 500÷(400×5) = 25 %. |
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