Thyristor Conduction Time for Class A Commutation Solution

STEP 0: Pre-Calculation Summary
Formula Used
Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance)
to = pi*sqrt(L*Ccom)
This formula uses 1 Constants, 1 Functions, 3 Variables
Constants Used
pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288
Functions Used
sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)
Variables Used
Thyristor Conduction Time - (Measured in Second) - Thyristor conduction time is the time period for which a thyristor conducts in class A commutation.
Inductance - (Measured in Henry) - Inductance is the tendency of an electric conductor to oppose a change in the electric current flowing in a thyrsitor commutation circuit.
Thyristor Commutation Capacitance - (Measured in Farad) - Thyristor Commutation Capacitance refers to the capacitance present in a thyristor device that affects the commutation process.
STEP 1: Convert Input(s) to Base Unit
Inductance: 0.46 Henry --> 0.46 Henry No Conversion Required
Thyristor Commutation Capacitance: 0.03 Farad --> 0.03 Farad No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
to = pi*sqrt(L*Ccom) --> pi*sqrt(0.46*0.03)
Evaluating ... ...
to = 0.369053574342579
STEP 3: Convert Result to Output's Unit
0.369053574342579 Second --> No Conversion Required
FINAL ANSWER
0.369053574342579 โ‰ˆ 0.369054 Second <-- Thyristor Conduction Time
(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 Conduction Time for Class A Commutation Formula

Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance)
to = pi*sqrt(L*Ccom)

What is Class A commutation of Thyristors?

Class A is one of the frequently used thyristor commutation techniques. If thyristor is triggered or turned on, then anode current will flow by charging capacitor C with dot as positive. The second-order under-damped circuit is formed by the inductor or AC resistor, capacitor, and resistor. If the current builds up through SCR and completes the half-cycle, then the inductor current will flow through the SCR in the reverse direction which will turn off the thyristor.
After the thyristor commutation or turning off the thyristor, the capacitor will start discharging from its peak value through the resistor in an exponential manner. The thyristor will be in reverse bias condition until the capacitor voltage returns to the supply voltage level.

How to Calculate Thyristor Conduction Time for Class A Commutation?

Thyristor Conduction Time for Class A Commutation calculator uses Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance) to calculate the Thyristor Conduction Time, The Thyristor conduction time for Class A commutation formula is defined as the time period for which a thyristor conducts in class A commutation. Thyristor Conduction Time is denoted by to symbol.

How to calculate Thyristor Conduction Time for Class A Commutation using this online calculator? To use this online calculator for Thyristor Conduction Time for Class A Commutation, enter Inductance (L) & Thyristor Commutation Capacitance (Ccom) and hit the calculate button. Here is how the Thyristor Conduction Time for Class A Commutation calculation can be explained with given input values -> 0.369054 = pi*sqrt(0.46*0.03).

FAQ

What is Thyristor Conduction Time for Class A Commutation?
The Thyristor conduction time for Class A commutation formula is defined as the time period for which a thyristor conducts in class A commutation and is represented as to = pi*sqrt(L*Ccom) or Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance). Inductance is the tendency of an electric conductor to oppose a change in the electric current flowing in a thyrsitor commutation circuit & Thyristor Commutation Capacitance refers to the capacitance present in a thyristor device that affects the commutation process.
How to calculate Thyristor Conduction Time for Class A Commutation?
The Thyristor conduction time for Class A commutation formula is defined as the time period for which a thyristor conducts in class A commutation is calculated using Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance). To calculate Thyristor Conduction Time for Class A Commutation, you need Inductance (L) & Thyristor Commutation Capacitance (Ccom). With our tool, you need to enter the respective value for Inductance & Thyristor Commutation Capacitance 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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