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Thyristor

Description

The thyristor is modeled as a non linear with a series RC snubber connected in parallel to the thyristor. The model considers various factors like forward bias threshold, forward and reverse break over voltage, blocking current, snubber elements, holding current, on/off resistance. Depending on the user's requirement, there is also an option to select the precision functionality, which allows the user to compensate for errors due to digital implementation of the model during the state switching as a function of time step. The turnoff time Tq is the recovery time between the instant the anode current has decreased to 0 and the when the thyristor is capable of withstanding positive voltage without turning on again.

The model also has an option to be controlled from external signals and an option to enter the precision delay D.

Table of Contents

Mask and Parameters

General



NameDescriptionUnitVariable = {Possible Values}
VminForward voltage dropV

{[0,1e12]}

RopenOpen state resistanceOhm{(0,1e12]}
RcloseClosed state resistanceOhm{(0,1e12]}
RsnubberSnubber resistanceOhm{[0,1e12]}
CsnubberSnubber capacitanceF{[0,1e12]}
Control type

External Input pins: Schematic control signal; the received integer is converted to a binary string where each digit corresponds to a phase

External Input sensors: Target digital inputs



Advanced

NameDescriptionUnitVariable = {Possible Values}
Fail resetFail reset

{Enable, Disable}

Precision valve

Enable: Enables recalculation of the state switch command using exact time between steps (as percentage of time step)

Disable: does not use precision valve


{Enable, Disable}
IminHolding currentA{[0,1e12]}
TqThyristor turn off times{[0,1e12]}
FbovForward break over voltageV{[0,1e12]}
RbovReverse break over voltageV{[0,1e12]}

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

NameDescription
Net_1Network connection
Net_2Network connection 

Inputs

NameDescription
DDelay used for precision valves
PBinary coded firing pulses

Outputs

None

Sensors

NameDescriptionUnit
FailSigFail reset signal
IDiode currentA
IswSwitch currentA
DelayDelay due to forward voltage drops
DelayExt12Delay for external triggers
Cmd12Signal state command
CmdExt12Signal state external command
State12Diode state

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