Thyristor Commutation Voltage for Class B Commutation Calculator

✖Input Voltage is defined as the voltage applied at the input terminal in a thyristor based circuit.ⓘ Input Voltage [V_in]			+10% -10%
✖Angular Frequency refers to the angular displacement per unit of time.ⓘ Angular Frequency [ω]			+10% -10%
✖Thyristor reverse bias time is defined as the time required by the thyristor to get reverse bias during the process of commutation.ⓘ Thyristor Reverse Bias Time [t₃]			+10% -10%
✖Auxiliary Thyristor Reverse Bias Time is the time after which the auxiliary thyristor gets reverse biased in class B commutation.ⓘ Auxiliary Thyristor Reverse Bias Time [t₄]			+10% -10%

✖Thyristor commutation voltage is defined as the magnitude of voltage at which a thyristor gets commutated.ⓘ Thyristor Commutation Voltage for Class B Commutation [V_com]

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Formula

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Thyristor Commutation Voltage for Class B Commutation

Formula

`"V"_{"com"} = "V"_{"in"}*cos("ω"*("t"_{"3"}-"t"_{"4"}))`

Example

`"42.80491V"="45V"*cos("23rad/s"*("0.67s"-"1.23s"))`

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Thyristor Commutation Voltage for Class B Commutation Solution

STEP 0: Pre-Calculation Summary

Formula Used

Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time))
V_com = V_in*cos(ω*(t₃-t₄))
This formula uses 1 Functions, 5 Variables

Functions Used

cos - Cosine of an angle is the ratio of the side adjacent to the angle to the hypotenuse of the triangle., cos(Angle)

Variables Used

Thyristor Commutation Voltage - (Measured in Volt) - Thyristor commutation voltage is defined as the magnitude of voltage at which a thyristor gets commutated.
Input Voltage - (Measured in Volt) - Input Voltage is defined as the voltage applied at the input terminal in a thyristor based circuit.
Angular Frequency - (Measured in Radian per Second) - Angular Frequency refers to the angular displacement per unit of time.
Thyristor Reverse Bias Time - (Measured in Second) - Thyristor reverse bias time is defined as the time required by the thyristor to get reverse bias during the process of commutation.
Auxiliary Thyristor Reverse Bias Time - (Measured in Second) - Auxiliary Thyristor Reverse Bias Time is the time after which the auxiliary thyristor gets reverse biased in class B commutation.

STEP 1: Convert Input(s) to Base Unit

Input Voltage: 45 Volt --> 45 Volt No Conversion Required
Angular Frequency: 23 Radian per Second --> 23 Radian per Second No Conversion Required
Thyristor Reverse Bias Time: 0.67 Second --> 0.67 Second No Conversion Required
Auxiliary Thyristor Reverse Bias Time: 1.23 Second --> 1.23 Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

V_com = V_in*cos(ω*(t₃-t₄)) --> 45*cos(23*(0.67-1.23))

Evaluating ... ...

V_com = 42.8049056074551

STEP 3: Convert Result to Output's Unit

42.8049056074551 Volt --> No Conversion Required

FINAL ANSWER

42.8049056074551 ≈ 42.80491 Volt <-- Thyristor Commutation Voltage

(Calculation completed in 00.004 seconds)

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< 5 SCR/Thyristor Commutation Calculators

Thyristor Commutation Voltage for Class B Commutation

Go Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time))

Circuit Turn off Time Class B Commutation

Go Circuit Turn Off Time Class B Commutation = Thyristor Commutation Capacitance*Thyristor Commutation Voltage/Load Current

Thyristor Conduction Time for Class A Commutation

Go Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance)

Peak Current Class B Thyristor Commutation

Go Peak Current = Input Voltage*sqrt(Thyristor Commutation Capacitance/Inductance)

Circuit Turn off Time Class C Commutation

Go Circuit Turn Off Time Class C Commutation = Stablizing Resistance*Thyristor Commutation Capacitance*ln(2)

< 16 SCR Characteristics Calculators

Worst Case Steady State Voltage across First Thyristor in Series Connected Thyristors

Go Worst Case Steady State Voltage = (Resultant Series Voltage of Thyristor String+Stablizing Resistance*(Number of Thyristors in Series-1)*Off State Current Spread)/Number of Thyristors in Series

Thyristor Commutation Voltage for Class B Commutation

Go Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time))

Derating Factor of Series Connected Thyristor String

Go Derating Factor of Thyristor String = 1-Resultant Series Voltage of Thyristor String/(Worst Case Steady State Voltage*Number of Thyristors in Series)

Time Period for UJT as Oscillator Thyristor Firing Circuit

Go Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio))

Emitter Current for UJT based Thyristor Firing Circuit

Go Emitter Current = (Emitter Voltage-Diode Voltage)/(Emitter Resistance Base 1+Emitter Resistance)

Circuit Turn off Time Class B Commutation

Go Circuit Turn Off Time Class B Commutation = Thyristor Commutation Capacitance*Thyristor Commutation Voltage/Load Current

Frequency of UJT as Oscillator Thyristor Firing Circuit

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

Thyristor Conduction Time for Class A Commutation

Go Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance)

Peak Current Class B Thyristor Commutation

Go Peak Current = Input Voltage*sqrt(Thyristor Commutation Capacitance/Inductance)

Intrinsic Stand-off Ratio for UJT based Thyristor Firing Circuit

Go Intrinsic Stand-off Ratio = Emitter Resistance Base 1/(Emitter Resistance Base 1+Emitter Resistance Base 2)

Circuit Turn off Time Class C Commutation

Go Circuit Turn Off Time Class C Commutation = Stablizing Resistance*Thyristor Commutation Capacitance*ln(2)

Leakage Current of Collector-Base Junction

Go Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current

Power Dissipated by Heat in SCR

Go Power Dissipated by Heat = (Junction Temperature-Ambient Temperature)/Thermal Resistance

Thermal Resistance of SCR

Go Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat

Discharging Current of dv-dt Protection Thyristor Circuits

Go Discharging Current = Input Voltage/((Resistance 1+Resistance 2))

Emitter Voltage to Turn On UJT based Thyristor Firing Circuit

Go Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage

Thyristor Commutation Voltage for Class B Commutation Formula

Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time))
V_com = V_in*cos(ω*(t₃-t₄))

What happens after the commutation of main SCR?

Once the main SCR T₁ is turned off, load current I₀ begins to flow from source Vs to load though C, L and D. This causes capacitor C to charge linearly from V_ab to zero at t = t₄ and then to source voltage V_s at t=t₅. At t=t₅, the capacitor is charged up to source voltage V_s with its left hand plate positive. Therefore, capacitor will not allow the flow of load current after t=t₅.

How to Calculate Thyristor Commutation Voltage for Class B Commutation?

Thyristor Commutation Voltage for Class B Commutation calculator uses Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time)) to calculate the Thyristor Commutation Voltage, The Thyristor commutation voltage for Class B commutation formula is defined as the voltage across the main thyristor, at which it gets commutated for class B commutation. Thyristor Commutation Voltage is denoted by V_com symbol.

How to calculate Thyristor Commutation Voltage for Class B Commutation using this online calculator? To use this online calculator for Thyristor Commutation Voltage for Class B Commutation, enter Input Voltage (V_in), Angular Frequency (ω), Thyristor Reverse Bias Time (t₃) & Auxiliary Thyristor Reverse Bias Time (t₄) and hit the calculate button. Here is how the Thyristor Commutation Voltage for Class B Commutation calculation can be explained with given input values -> 42.80491 = 45*cos(23*(0.67-1.23)).

FAQ

What is Thyristor Commutation Voltage for Class B Commutation?

The Thyristor commutation voltage for Class B commutation formula is defined as the voltage across the main thyristor, at which it gets commutated for class B commutation and is represented as V_com = V_in*cos(ω*(t₃-t₄)) or Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time)). Input Voltage is defined as the voltage applied at the input terminal in a thyristor based circuit, Angular Frequency refers to the angular displacement per unit of time, Thyristor reverse bias time is defined as the time required by the thyristor to get reverse bias during the process of commutation & Auxiliary Thyristor Reverse Bias Time is the time after which the auxiliary thyristor gets reverse biased in class B commutation.

How to calculate Thyristor Commutation Voltage for Class B Commutation?

The Thyristor commutation voltage for Class B commutation formula is defined as the voltage across the main thyristor, at which it gets commutated for class B commutation is calculated using Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time)). To calculate Thyristor Commutation Voltage for Class B Commutation, you need Input Voltage (V_in), Angular Frequency (ω), Thyristor Reverse Bias Time (t₃) & Auxiliary Thyristor Reverse Bias Time (t₄). With our tool, you need to enter the respective value for Input Voltage, Angular Frequency, Thyristor Reverse Bias Time & Auxiliary Thyristor Reverse Bias Time and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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