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Thyristor Firing Angle for RC Firing Circuit Formula

GoFiring Angle of UJT as Oscillator Thyristor Firing Circuit Formula

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Firing angle is the angle in the AC cycle at which the thyristor starts conducting at the application of positive voltage to gate. Check FAQs

∠α = a \sin (V th \cdot (\frac{R stb + R var + R thy}{V max \cdot R stb}))

∠α - Firing Angle?V_th - Gate Threshold Voltage?R_stb - Stablizing Resistance?R_var - Variable Resistance?R_thy - Thyristor Resistance?V_max - Peak Input Voltage?

Thyristor Firing Angle for RC Firing Circuit Example

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Here is how the Thyristor Firing Angle for RC Firing Circuit equation looks like with Values.

Here is how the Thyristor Firing Angle for RC Firing Circuit equation looks like with Units.

Here is how the Thyristor Firing Angle for RC Firing Circuit equation looks like.

1.2149 = a \sin (1.7 \cdot (\frac{32 + 5.8 + 50}{220 \cdot 32}))

1.2149° = a \sin (1.7V \cdot (\frac{32Ω + 5.8Ω + 50Ω}{220V \cdot 32Ω}))

1.2149 = a \sin (1.7 \cdot (\frac{32 + 5.8 + 50}{220 \cdot 32}))

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Thyristor Firing Angle for RC Firing Circuit Solution

Follow our step by step solution on how to calculate Thyristor Firing Angle for RC Firing Circuit?

FIRST Step Consider the formula

∠α = a \sin (V th \cdot (\frac{R stb + R var + R thy}{V max \cdot R stb}))

Next Step Substitute values of Variables

∴

∠α = a \sin (1.7V \cdot (\frac{32Ω + 5.8Ω + 50Ω}{220V \cdot 32Ω}))

Next Step Prepare to Evaluate

∴

∠α = a \sin (1.7 \cdot (\frac{32 + 5.8 + 50}{220 \cdot 32}))

Next Step Evaluate

∴

∠α = 0.0212032932712534rad

Next Step Convert to Output's Unit

∴

∠α = 1.21485921622119°

LAST Step Rounding Answer

∴

∠α = 1.2149°

Thyristor Firing Angle for RC Firing Circuit Formula Elements

Variables

Functions

Firing Angle

Firing angle is the angle in the AC cycle at which the thyristor starts conducting at the application of positive voltage to gate.

Symbol: ∠α

Measurement: AngleUnit: °

Note: Value can be positive or negative.

Formulas to find Firing Angle

Gate Threshold Voltage

Gate Threshold Voltage is the minimum voltage required at the gate terminal of an SCR to turn it on.

Symbol: V_th

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Gate Threshold Voltage

Stablizing Resistance

Stablizing Resistance is defined as the opposition faced by the flow of current through a thyristor based circuit which is used to stablize.

Symbol: R_stb

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Stablizing Resistance

Variable Resistance

Variable Resistance is variable resistance whose value can be varied to prevent the relay from operating due to saturation of the current during transistors and thyristor start-up.

Symbol: R_var

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Variable Resistance

Thyristor Resistance

Thyristor Resistance is defined as the opposition faced by the flow of current through a thyristor based circuit.

Symbol: R_thy

Measurement: Electric ResistanceUnit: Ω

Note: Value can be positive or negative.

Formulas to find Thyristor Resistance

Peak Input Voltage

Peak Input Voltage is the peak of the alternating voltage provided at the input of any electrical circuit.

Symbol: V_max

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Peak Input Voltage

sin

Sine is a trigonometric function that describes the ratio of the length of the opposite side of a right triangle to the length of the hypotenuse.

Syntax: sin(Angle)

asin

The inverse sine function, is a trigonometric function that takes a ratio of two sides of a right triangle and outputs the angle opposite the side with the given ratio.

Syntax: asin(Number)

Other Formulas to find Firing Angle

Go Firing Angle of UJT as Oscillator Thyristor Firing Circuit

∠α = ω \cdot R stb \cdot C \cdot \ln (\frac{1}{1 - η})

Other formulas in SCR Firing Circuit category

Go Discharging Current of dv-dt Protection Thyristor Circuits

I discharge = \frac{V in}{(R 1 + R 2)}

Go Peak Thyristor Gate Voltage for Resistance Firing Circuit

V g(max) = \frac{V max \cdot R stb}{R var + R thy + R stb}

Go Peak Thyristor Gate Voltage for RC Firing Circuit

V g(max) = \frac{V th}{\sin (ω \cdot T w)}

Go Intrinsic Stand-off Ratio for UJT based Thyristor Firing Circuit

η = \frac{R B1}{R B1 + R B2}

How to Evaluate Thyristor Firing Angle for RC Firing Circuit?

Thyristor Firing Angle for RC Firing Circuit evaluator uses Firing Angle = asin(Gate Threshold Voltage*((Stablizing Resistance+Variable Resistance+Thyristor Resistance)/(Peak Input Voltage*Stablizing Resistance))) to evaluate the Firing Angle, The Thyristor firing angle for RC firing circuit formula is defined as the firing angle at which the thyristor starts conducting. Firing Angle is denoted by ∠α symbol.

How to evaluate Thyristor Firing Angle for RC Firing Circuit using this online evaluator? To use this online evaluator for Thyristor Firing Angle for RC Firing Circuit, enter Gate Threshold Voltage (V_th), Stablizing Resistance (R_stb), Variable Resistance (R_var), Thyristor Resistance (R_thy) & Peak Input Voltage (V_max) and hit the calculate button.

FAQs on Thyristor Firing Angle for RC Firing Circuit

What is the formula to find Thyristor Firing Angle for RC Firing Circuit?

The formula of Thyristor Firing Angle for RC Firing Circuit is expressed as Firing Angle = asin(Gate Threshold Voltage*((Stablizing Resistance+Variable Resistance+Thyristor Resistance)/(Peak Input Voltage*Stablizing Resistance))). Here is an example- 69.60631 = asin(1.7*((32+5.8+50)/(220*32))).

How to calculate Thyristor Firing Angle for RC Firing Circuit?

With Gate Threshold Voltage (V_th), Stablizing Resistance (R_stb), Variable Resistance (R_var), Thyristor Resistance (R_thy) & Peak Input Voltage (V_max) we can find Thyristor Firing Angle for RC Firing Circuit using the formula - Firing Angle = asin(Gate Threshold Voltage*((Stablizing Resistance+Variable Resistance+Thyristor Resistance)/(Peak Input Voltage*Stablizing Resistance))). This formula also uses Sine (sin), Inverse Sine (asin) function(s).

What are the other ways to Calculate Firing Angle?

Here are the different ways to Calculate Firing Angle-

Firing Angle=Angular Frequency*Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio))

Can the Thyristor Firing Angle for RC Firing Circuit be negative?

Yes, the Thyristor Firing Angle for RC Firing Circuit, measured in Angle can be negative.

Which unit is used to measure Thyristor Firing Angle for RC Firing Circuit?

Thyristor Firing Angle for RC Firing Circuit is usually measured using the Degree[°] for Angle. Radian[°], Minute[°], Second[°] are the few other units in which Thyristor Firing Angle for RC Firing Circuit can be measured.

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Thyristor Firing Angle for RC Firing Circuit Formula

​GoFiring Angle of UJT as Oscillator Thyristor Firing Circuit Formula

Thyristor Firing Angle for RC Firing Circuit Example

Thyristor Firing Angle for RC Firing Circuit Solution

Thyristor Firing Angle for RC Firing Circuit Formula Elements

Other Formulas to find Firing Angle

Other formulas in SCR Firing Circuit category

How to Evaluate Thyristor Firing Angle for RC Firing Circuit?

FAQs on Thyristor Firing Angle for RC Firing Circuit

Variable Name

GoFiring Angle of UJT as Oscillator Thyristor Firing Circuit Formula