Circuit Turn Off Time for Main SCR in Chopper Calculator

✖Resonant Frequency at which the impedance of a circuit is purely resistive.ⓘ Resonant Frequency [ω_o]			+10% -10%
✖The commutation angle (θ) is the phase angle at which a device like a thyristor is intentionally turned off in an AC waveform to control current flow.ⓘ Commutation Angle [θ₁]			+10% -10%

✖Circuit Turn Off Time is defined as duration taken for the chopper to turn off or open its switching elements (usually thyristors or SCRs) once the decision is made to interrupt the current flow.ⓘ Circuit Turn Off Time for Main SCR in Chopper [T_c]

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Formula

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Circuit Turn Off Time for Main SCR in Chopper

Formula

`"T"_{"c"} = 1/"ω"_{"o"}*(pi-2*"θ"_{"1"})`

Example

`"0.194604s"=1/"16rad/s"*(pi-2*"0.8°")`

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Circuit Turn Off Time for Main SCR in Chopper Solution

STEP 0: Pre-Calculation Summary

Formula Used

Circuit Turn Off Time = 1/Resonant Frequency*(pi-2*Commutation Angle)
T_c = 1/ω_o*(pi-2*θ₁)
This formula uses 1 Constants, 3 Variables

Constants Used

pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288

Variables Used

Circuit Turn Off Time - (Measured in Second) - Circuit Turn Off Time is defined as duration taken for the chopper to turn off or open its switching elements (usually thyristors or SCRs) once the decision is made to interrupt the current flow.
Resonant Frequency - (Measured in Radian per Second) - Resonant Frequency at which the impedance of a circuit is purely resistive.
Commutation Angle - (Measured in Radian) - The commutation angle (θ) is the phase angle at which a device like a thyristor is intentionally turned off in an AC waveform to control current flow.

STEP 1: Convert Input(s) to Base Unit

Resonant Frequency: 16 Radian per Second --> 16 Radian per Second No Conversion Required
Commutation Angle: 0.8 Degree --> 0.013962634015952 Radian (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T_c = 1/ω_o*(pi-2*θ₁) --> 1/16*(pi-2*0.013962634015952)

Evaluating ... ...

T_c = 0.194604211597368

STEP 3: Convert Result to Output's Unit

0.194604211597368 Second --> No Conversion Required

FINAL ANSWER

0.194604211597368 ≈ 0.194604 Second <-- Circuit Turn Off Time

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electrical » Power Electronics » Choppers » Commutated Chopper » Circuit Turn Off Time for Main SCR in Chopper

Credits

Created by Pratik Kumar Singh

Vellore Institute of Technology (VIT), Vellore

Pratik Kumar Singh has created this Calculator and 10+ more calculators!

Verified by Aman Dhussawat

GURU TEGH BAHADUR INSTITUTE OF TECHNOLOGY (GTBIT), NEW DELHI

Aman Dhussawat has verified this Calculator and 100+ more calculators!

< 9 Commutated Chopper Calculators

Average Output Voltage in Load Commutated Chopper

Go Average Output Voltage = (2*Input Voltage^2*Commutation Capacitance*Chopping Frequency)/Output Current

Average Value of Output Voltage

Go Average Output Voltage = Input Voltage*(Chopper On Time-Circuit Turn Off Time)/Chopping Period

Average Voltage across Load

Go Output Voltage = Source Voltage*(Chopping Period/(Chopping Period-Chopper On Time))

Peak Diode Current of Voltage Commutated Chopper

Go Peak Diode Current = Source Voltage*sqrt(Capacitance/Inductance)

Peak Capacitor Current in Voltage Commutated Chopper

Go Peak Capacitor Current = Source Voltage/(Resonant Frequency*Commutating Inductance)

Total Commutation Interval in Load Commutated Chopper

Go Total Commutation Interval = (2*Capacitance*Source Voltage)/Output Current

Circuit Turn Off Time for Main SCR in Chopper

Go Circuit Turn Off Time = 1/Resonant Frequency*(pi-2*Commutation Angle)

Circuit Turn Off Time for SCR in Load Commutated Chopper

Go Circuit Turn Off Time = (Capacitance*Source Voltage)/Output Current

Maximum Chopping Frequency in Load Commutated Chopper

Go Maximum Frequency = 1/Chopper On Time

Circuit Turn Off Time for Main SCR in Chopper Formula

Circuit Turn Off Time = 1/Resonant Frequency*(pi-2*Commutation Angle)
T_c = 1/ω_o*(pi-2*θ₁)

What is the significance of the circuit turn-off time for the main SCR in a chopper circuit?

The circuit turn-off time for the main SCR in a chopper circuit is crucial as it directly impacts circuit efficiency and performance. A shorter turn-off time minimizes switching losses, reduces heat generation, and allows for faster response to control signals. This leads to improved energy conversion efficiency and precise control of the chopper, making it essential for applications like motor control, power regulation, and energy management where efficiency and accuracy are paramount.

How to Calculate Circuit Turn Off Time for Main SCR in Chopper?

Circuit Turn Off Time for Main SCR in Chopper calculator uses Circuit Turn Off Time = 1/Resonant Frequency*(pi-2*Commutation Angle) to calculate the Circuit Turn Off Time, The Circuit Turn Off Time for Main SCR in Chopper formula is defined as the duration it takes for the SCR to switch from its conducting state to its non-conducting state. Circuit Turn Off Time is denoted by T_c symbol.

How to calculate Circuit Turn Off Time for Main SCR in Chopper using this online calculator? To use this online calculator for Circuit Turn Off Time for Main SCR in Chopper, enter Resonant Frequency (ω_o) & Commutation Angle (θ₁) and hit the calculate button. Here is how the Circuit Turn Off Time for Main SCR in Chopper calculation can be explained with given input values -> 0.194495 = 1/16*(pi-2*0.013962634015952).

FAQ

What is Circuit Turn Off Time for Main SCR in Chopper?

The Circuit Turn Off Time for Main SCR in Chopper formula is defined as the duration it takes for the SCR to switch from its conducting state to its non-conducting state and is represented as T_c = 1/ω_o*(pi-2*θ₁) or Circuit Turn Off Time = 1/Resonant Frequency*(pi-2*Commutation Angle). Resonant Frequency at which the impedance of a circuit is purely resistive & The commutation angle (θ) is the phase angle at which a device like a thyristor is intentionally turned off in an AC waveform to control current flow.

How to calculate Circuit Turn Off Time for Main SCR in Chopper?

The Circuit Turn Off Time for Main SCR in Chopper formula is defined as the duration it takes for the SCR to switch from its conducting state to its non-conducting state is calculated using Circuit Turn Off Time = 1/Resonant Frequency*(pi-2*Commutation Angle). To calculate Circuit Turn Off Time for Main SCR in Chopper, you need Resonant Frequency (ω_o) & Commutation Angle (θ₁). With our tool, you need to enter the respective value for Resonant Frequency & Commutation Angle and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Circuit Turn Off Time?

In this formula, Circuit Turn Off Time uses Resonant Frequency & Commutation Angle. We can use 1 other way(s) to calculate the same, which is/are as follows -

Circuit Turn Off Time = (Capacitance*Source Voltage)/Output Current

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