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The scr in the circuit shown has a latching current of 40mA. A gate pulse of 50ms is applied to the scr. The maximum value of R in ohms to ensure successful firing of the scr?
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The scr in the circuit shown has a latching current of 40mA. A gate pu...
Calculating Maximum Value of R to Ensure Successful Firing of SCR
- Determine Required Gate Current
To calculate the maximum value of R, we first need to determine the required gate current. Given that the latching current of the SCR is 40mA, we can assume that the required gate current is also 40mA. - Calculate Gate Charge
The gate charge for the SCR can be calculated using the following formula:
Qg = Ig x T
where Qg is the gate charge, Ig is the gate current, and T is the gate pulse width. Substituting the given values, we get:
Qg = 40mA x 50ms = 2mC - Calculate Maximum Allowable Resistance
The maximum allowable resistance can be calculated using the following formula:
R = (Vp – Vg) / Ig
where R is the resistance, Vp is the peak voltage of the AC source, Vg is the gate trigger voltage, and Ig is the required gate current. The gate trigger voltage for an SCR is typically around 1V. Assuming a peak voltage of 240V, we get:
R = (240V – 1V) / 40mA = 5962.5 ohms - Finalize Maximum Value of R
Therefore, the maximum value of R that will ensure successful firing of the SCR is approximately 5.9kohms.
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The scr in the circuit shown has a latching current of 40mA. A gate pulse of 50ms is applied to the scr. The maximum value of R in ohms to ensure successful firing of the scr?
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The scr in the circuit shown has a latching current of 40mA. A gate pulse of 50ms is applied to the scr. The maximum value of R in ohms to ensure successful firing of the scr? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The scr in the circuit shown has a latching current of 40mA. A gate pulse of 50ms is applied to the scr. The maximum value of R in ohms to ensure successful firing of the scr? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The scr in the circuit shown has a latching current of 40mA. A gate pulse of 50ms is applied to the scr. The maximum value of R in ohms to ensure successful firing of the scr?.
The scr in the circuit shown has a latching current of 40mA. A gate pulse of 50ms is applied to the scr. The maximum value of R in ohms to ensure successful firing of the scr? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The scr in the circuit shown has a latching current of 40mA. A gate pulse of 50ms is applied to the scr. The maximum value of R in ohms to ensure successful firing of the scr? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The scr in the circuit shown has a latching current of 40mA. A gate pulse of 50ms is applied to the scr. The maximum value of R in ohms to ensure successful firing of the scr?.
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