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A firing angle controlled triac is feeding a single-phase R-L load with L=15 mH and R=11 ohm.The triac input voltage is 220 V rms and 60 Hz. a) Calculate the minimum firing angle at which triac can be fired. b) If firing angle is 30 degress find the angle ß at which zero current occurs.

A firing angle controlled triac is feeding a single-phase R-L load with L=15 mH and R=11 ohm.The triac input voltage is 220 V rms and 60 Hz. a) Calculate the minimum firing angle at which triac can be fired. b) If firing angle is 30 degress find the angle ß at which zero current occurs.

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A firing angle controlled triac is feeding a single-phase R-L load with L=15 mH and R=11 ohm.The triac input voltage is 220 V rms and 60 Hz. a) Calculate the minimum firing angle at which triac can be fired. b) If firing angle is 30 degress find the angle ß at which zero current occurs.
Transcribed Image Text:A firing angle controlled triac is feeding a single-phase R-L load with L=15 mH and R=11 ohm.The triac input voltage is 220 V rms and 60 Hz. a) Calculate the minimum firing angle at which triac can be fired. b) If firing angle is 30 degress find the angle ß at which zero current occurs.
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