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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
VE = VRb1+VD
This formula uses 2 Variables
Variables Used
Emitter resistance base 1 voltage - Emitter resistance base 1 voltage is the voltage across the resistance connected to the base 1 terminal of an UJT. (Measured in Ohm)
Diode voltage - Diode voltage is defined as the voltage developed across diode when it is in on state. (Measured in Volt)
STEP 1: Convert Input(s) to Base Unit
Emitter resistance base 1 voltage: 10 Ohm --> 10 Ohm No Conversion Required
Diode voltage: 5 Volt --> 5 Volt No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
VE = VRb1+VD --> 10+5
Evaluating ... ...
VE = 15
STEP 3: Convert Result to Output's Unit
15 Volt --> No Conversion Required
15 Volt <-- Emitter Voltage
(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
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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

### Emitter voltage to turn on UJT based Thyristor firing circuit Formula

Emitter Voltage = Emitter resistance base 1 voltage+Diode voltage
VE = VRb1+VD

## 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 VE 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 (VRb1) & Diode voltage (VD) 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 -> 15 = 10+5.

### 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 VE = VRb1+VD 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.
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 (VRb1) & Diode voltage (VD). 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. Let Others Know