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Firing Angle of UJT as Oscillator Thyristor Firing Circuit Formula

GoThyristor Firing Angle for RC 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 = ω \cdot R stb \cdot C \cdot \ln (\frac{1}{1 - η})

∠α - Firing Angle?ω - Angular Frequency?R_stb - Stablizing Resistance?C - Capacitance?η - Intrinsic Stand-off Ratio?

Firing Angle of UJT as Oscillator Thyristor Firing Circuit Example

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Here is how the Firing Angle of UJT as Oscillator Thyristor Firing Circuit equation looks like with Values.

Here is how the Firing Angle of UJT as Oscillator Thyristor Firing Circuit equation looks like with Units.

Here is how the Firing Angle of UJT as Oscillator Thyristor Firing Circuit equation looks like.

9524.8331 = 23 \cdot 32 \cdot 0.3 \cdot \ln (\frac{1}{1 - 0.529})

9524.8331° = 23rad/s \cdot 32Ω \cdot 0.3F \cdot \ln (\frac{1}{1 - 0.529})

9524.8331 = 23 \cdot 32 \cdot 0.3 \cdot \ln (\frac{1}{1 - 0.529})

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Firing Angle of UJT as Oscillator Thyristor Firing Circuit Solution

Follow our step by step solution on how to calculate Firing Angle of UJT as Oscillator Thyristor Firing Circuit?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

∠α = 23rad/s \cdot 32Ω \cdot 0.3F \cdot \ln (\frac{1}{1 - 0.529})

Next Step Prepare to Evaluate

∴

∠α = 23 \cdot 32 \cdot 0.3 \cdot \ln (\frac{1}{1 - 0.529})

Next Step Evaluate

∴

∠α = 166.239698440431rad

Next Step Convert to Output's Unit

∴

∠α = 9524.83310816601°

LAST Step Rounding Answer

∴

∠α = 9524.8331°

Firing Angle of UJT as Oscillator Thyristor 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

Angular Frequency

Angular Frequency refers to the angular displacement per unit of time.

Symbol: ω

Measurement: Angular FrequencyUnit: rad/s

Note: Value should be greater than 0.

Formulas to find Angular Frequency

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

Capacitance

Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential for any thyristor circuit.

Symbol: C

Measurement: CapacitanceUnit: F

Note: Value should be greater than 0.

Formulas to find Capacitance

Intrinsic Stand-off Ratio

Intrinsic stand-off ratio UJT as Oscillator is defined as the ratio of emitter base 1 resistance to the total emitter base junctions resistances.

Symbol: η

Measurement: NAUnit: Unitless

Note: Value should be between 0.5 to 0.85.

Formulas to find Intrinsic Stand-off Ratio

The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function.

Syntax: ln(Number)

Other Formulas to find Firing Angle

Go Thyristor Firing Angle for RC Firing Circuit

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

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 Firing Angle of UJT as Oscillator Thyristor Firing Circuit?

Firing Angle of UJT as Oscillator Thyristor Firing Circuit evaluator uses Firing Angle = Angular Frequency*Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)) to evaluate the Firing Angle, The Firing Angle of UJT as Oscillator Thyristor Firing Circuit formula is defined as the angle at which the injection of voltage at the gate terminal of the thyristor causes it to start conducting. Firing Angle is denoted by ∠α symbol.

How to evaluate Firing Angle of UJT as Oscillator Thyristor Firing Circuit using this online evaluator? To use this online evaluator for Firing Angle of UJT as Oscillator Thyristor Firing Circuit, enter Angular Frequency (ω), Stablizing Resistance (R_stb), Capacitance (C) & Intrinsic Stand-off Ratio (η) and hit the calculate button.

FAQs on Firing Angle of UJT as Oscillator Thyristor Firing Circuit

What is the formula to find Firing Angle of UJT as Oscillator Thyristor Firing Circuit?

The formula of Firing Angle of UJT as Oscillator Thyristor Firing Circuit is expressed as Firing Angle = Angular Frequency*Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)). Here is an example- 664167.5 = 23*32*0.3*ln(1/(1-0.529)).

How to calculate Firing Angle of UJT as Oscillator Thyristor Firing Circuit?

With Angular Frequency (ω), Stablizing Resistance (R_stb), Capacitance (C) & Intrinsic Stand-off Ratio (η) we can find Firing Angle of UJT as Oscillator Thyristor Firing Circuit using the formula - Firing Angle = Angular Frequency*Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)). This formula also uses Natural Logarithm (ln) function(s).

What are the other ways to Calculate Firing Angle?

Here are the different ways to Calculate Firing Angle-

Firing Angle=asin(Gate Threshold Voltage*((Stablizing Resistance+Variable Resistance+Thyristor Resistance)/(Peak Input Voltage*Stablizing Resistance)))

Can the Firing Angle of UJT as Oscillator Thyristor Firing Circuit be negative?

Yes, the Firing Angle of UJT as Oscillator Thyristor Firing Circuit, measured in Angle can be negative.

Which unit is used to measure Firing Angle of UJT as Oscillator Thyristor Firing Circuit?

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

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Firing Angle of UJT as Oscillator Thyristor Firing Circuit Formula

​GoThyristor Firing Angle for RC Firing Circuit Formula

Firing Angle of UJT as Oscillator Thyristor Firing Circuit Example

Firing Angle of UJT as Oscillator Thyristor Firing Circuit Solution

Firing Angle of UJT as Oscillator Thyristor Firing Circuit Formula Elements

Other Formulas to find Firing Angle

Other formulas in SCR Firing Circuit category

How to Evaluate Firing Angle of UJT as Oscillator Thyristor Firing Circuit?

FAQs on Firing Angle of UJT as Oscillator Thyristor Firing Circuit

Variable Name

GoThyristor Firing Angle for RC Firing Circuit Formula