Emitter Voltage to Turn On UJT based Thyristor Firing Circuit Calculator

✖Emitter resistance base 1 voltage is the voltage across the resistance connected to the base 1 terminal of an UJT.ⓘ Emitter Resistance Base 1 Voltage [V_RB1]			+10% -10%
✖Diode voltage is defined as the voltage developed across diode when it is in on state in a thyristor based circuit.ⓘ Diode Voltage [V_d]			+10% -10%

✖Emitter Voltage is defined as the voltage across the emitter terminal of any transistor device.ⓘ Emitter Voltage to Turn On UJT based Thyristor Firing Circuit [V_E]

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Formula

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Emitter Voltage to Turn On UJT based Thyristor Firing Circuit

Formula

`"V"_{"E"} = "V"_{"RB1"}+"V"_{"d"}`

Example

`"60V"="40V"+"20V"`

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Emitter Voltage to Turn On UJT based Thyristor Firing Circuit Solution

STEP 0: Pre-Calculation Summary

Formula Used

Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage
V_E = V_RB1+V_d
This formula uses 3 Variables

Variables Used

Emitter Voltage - (Measured in Volt) - Emitter Voltage is defined as the voltage across the emitter terminal of any transistor device.
Emitter Resistance Base 1 Voltage - (Measured in Volt) - Emitter resistance base 1 voltage is the voltage across the resistance connected to the base 1 terminal of an UJT.
Diode Voltage - (Measured in Volt) - Diode voltage is defined as the voltage developed across diode when it is in on state in a thyristor based circuit.

STEP 1: Convert Input(s) to Base Unit

Emitter Resistance Base 1 Voltage: 40 Volt --> 40 Volt No Conversion Required
Diode Voltage: 20 Volt --> 20 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

V_E = V_RB1+V_d --> 40+20

Evaluating ... ...

V_E = 60

STEP 3: Convert Result to Output's Unit

60 Volt --> No Conversion Required

FINAL ANSWER

60 Volt <-- Emitter Voltage

(Calculation completed in 00.004 seconds)

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Created by Parminder Singh

Chandigarh University (CU), Punjab

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BMS College of Engineering (BMSCE), Bangalore

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< 10+ SCR Firing Circuit Calculators

Thyristor Firing Angle for RC Firing Circuit

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

Peak Thyristor Gate Voltage for Resistance Firing Circuit

Go Maximum Gate Voltage = (Peak Input Voltage*Stablizing Resistance)/(Variable Resistance+Thyristor Resistance+Stablizing Resistance)

Firing Angle of UJT as Oscillator Thyristor Firing Circuit

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

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))

Peak Thyristor Gate Voltage for RC Firing Circuit

Go Maximum Gate Voltage = Gate Threshold Voltage/(sin(Angular Frequency*Time Period of Progressive Wave))

Emitter Current for UJT based Thyristor Firing Circuit

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

Frequency of UJT as Oscillator Thyristor Firing Circuit

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

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)

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

< 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

Emitter Voltage to Turn On UJT based Thyristor Firing Circuit Formula

Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage
V_E = V_RB1+V_d

What is the significance of two base terminals in UJT?

These two series resistances produce a voltage divider network between the two base terminals of the UJT and since this channel stretches from B2 to B1, when a voltage is applied across the device, the potential at any point along the channel will be in proportion to its position between terminals B2 and B1. The level of the voltage gradient therefore depends upon the amount of supply voltage.

When used in a circuit, terminal B1 is connected to ground and the Emitter serves as the input to the device. Suppose a voltage VBB is applied across the UJT between B2 and B1 so that B2 is biased positive relative to B1.

How to Calculate Emitter Voltage to Turn On UJT based Thyristor Firing Circuit?

Emitter Voltage to Turn On UJT based Thyristor Firing Circuit calculator uses Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage to calculate the Emitter Voltage, The Emitter voltage to turn on UJT based Thyristor firing circuit formula is defined as the magnitude of the emitter voltage required in order to turn the UJT on for firing the thyristor circuit. Emitter Voltage is denoted by V_E symbol.

How to calculate Emitter Voltage to Turn On UJT based Thyristor Firing Circuit using this online calculator? To use this online calculator for Emitter Voltage to Turn On UJT based Thyristor Firing Circuit, enter Emitter Resistance Base 1 Voltage (V_RB1) & Diode Voltage (V_d) and hit the calculate button. Here is how the Emitter Voltage to Turn On UJT based Thyristor Firing Circuit calculation can be explained with given input values -> 60 = 40+20.

FAQ

What is Emitter Voltage to Turn On UJT based Thyristor Firing Circuit?

The Emitter voltage to turn on UJT based Thyristor firing circuit formula is defined as the magnitude of the emitter voltage required in order to turn the UJT on for firing the thyristor circuit and is represented as V_E = V_RB1+V_d or Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage. Emitter resistance base 1 voltage is the voltage across the resistance connected to the base 1 terminal of an UJT & Diode voltage is defined as the voltage developed across diode when it is in on state in a thyristor based circuit.

How to calculate Emitter Voltage to Turn On UJT based Thyristor Firing Circuit?

The Emitter voltage to turn on UJT based Thyristor firing circuit formula is defined as the magnitude of the emitter voltage required in order to turn the UJT on for firing the thyristor circuit is calculated using Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage. To calculate Emitter Voltage to Turn On UJT based Thyristor Firing Circuit, you need Emitter Resistance Base 1 Voltage (V_RB1) & Diode Voltage (V_d). With our tool, you need to enter the respective value for Emitter Resistance Base 1 Voltage & Diode Voltage 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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