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## Thyristor conduction time for Class A commutation Solution

STEP 0: Pre-Calculation Summary
Formula Used
Thyristor conduction time = pi*(sqrt(Inductance*Capacitance))
to = pi*(sqrt(L*C))
This formula uses 1 Constants, 1 Functions, 2 Variables
Constants Used
pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288
Functions Used
sqrt - Squre root function, sqrt(Number)
Variables Used
Inductance - Inductance is the tendency of an electric conductor to oppose a change in the electric current flowing through it. (Measured in Henry)
Capacitance - Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential. (Measured in Farad)
STEP 1: Convert Input(s) to Base Unit
Inductance: 5 Henry --> 5 Henry No Conversion Required
Capacitance: 3 Farad --> 3 Farad No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
to = pi*(sqrt(L*C)) --> pi*(sqrt(5*3))
Evaluating ... ...
to = 12.1673360279208
STEP 3: Convert Result to Output's Unit
12.1673360279208 Second --> No Conversion Required
12.1673360279208 Second <-- Thyristor conduction time
(Calculation completed in 00.015 seconds)

## < 10+ Thyristors Calculators

Excess work due to thyristor 1 in chopper circuit
Excess energy in chopper circuit = 0.5*Reverse di/dt limiting inductance*((Load current of chopper circuit+(Reverse recovery time*Commutation capacitor voltage)/Reverse di/dt limiting inductance)-(Load current of chopper circuit^2)) Go
Worst case steady state voltage across first thyristor in series connected thyristors
Worst case steady state voltage of thyristor 1 = ((Resultant series voltage of thyristor string+(Number of thyristors in series thyristor string-1)*Resistance*Off state current spread of thyristor string))/Number of thyristors in series thyristor string Go
Voltage across first thyristor in series-connected thyristors
Voltage across thyristor 1 in thyristor string = (Resultant series voltage of thyristor string+(Number of thyristors in series thyristor string-1)*Resistance*Off state current spread of thyristor string)/Number of thyristors in series thyristor string Go
Resultant series voltage of series connected thyristor string
Resultant series voltage of thyristor string = Number of thyristors in series thyristor string*Voltage across thyristor 1 in thyristor string-(Number of thyristors in series thyristor string-1)*Resistance*Off state current spread of thyristor string Go
Maximum Thyristor gate voltage for resistance firing circuit
Maximum gate voltage = Maximum AC input voltage*(Stabilizing Resistance/(Stabilizing Resistance+Variable Resistance+Resistance)) Go
Derating factor of series connected thyristor string
Derating factor of thyristor string = 1-(Resultant series voltage of thyristor string/(Number of thyristors in series thyristor string*Worst case steady state voltage of thyristor 1)) Go
Power dissipated by heat in SCR
Power dissipated by heat in SCR = (SCR junction temperature-SCR ambient temperature)/Thermal resistance of SCR Go
Thermal resistance of SCR
Thermal resistance of SCR = (SCR junction temperature-SCR ambient temperature)/Power dissipated by heat in SCR Go
Leakage current of the collector-base junction
Collector to base leakage current = Collector current-Common base current gain of transistor*Emitter current Go
Discharging current of dv/dt protection thyristor circuits
Discharging current of thyristor circuit = Input voltage/((Resistance+Resistance)) Go

### Thyristor conduction time for Class A commutation Formula

Thyristor conduction time = pi*(sqrt(Inductance*Capacitance))
to = pi*(sqrt(L*C))

## 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*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) & Capacitance (C) and hit the calculate button. Here is how the Thyristor conduction time for Class A commutation calculation can be explained with given input values -> 12.16734 = pi*(sqrt(5*3)).

### 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*C)) or Thyristor conduction time = pi*(sqrt(Inductance*Capacitance)). Inductance is the tendency of an electric conductor to oppose a change in the electric current flowing through it & Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.
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*Capacitance)). To calculate Thyristor conduction time for Class A commutation, you need Inductance (L) & Capacitance (C). With our tool, you need to enter the respective value for Inductance & 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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