Description

Similar to the thyristor model, a GTO+diode is modeled as a thyristor with an internal diode in shunt. The switch of the GTOis controlled by a logical signal depending on the terminal voltage, current, and the gating signal. The diode protects the semiconductor device by providing a conduction path for reverse current.

The model also provides a signal Failsig which shows if the block has reached its normal or reverse breakdown voltage or if an untimely firing had happened. The model also has an option to be controlled from external signals and an option to enter the precision delay D.

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.

Table of Contents

Mask and Parameters

General

Name	Description	Unit	Variable = {Possible Values}
Vmin	Forward voltage drop	V	{[0,1e12]}
Ropen	Open state resistance	Ohm	{(0,1e12]}
Rclose	Closed state resistance	Ohm	{(0,1e12]}
Rsnubber	Snubber resistance	Ohm	{[0,1e12]}
Csnubber	Snubber capacitance	F	{[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

Name	Description	Unit	Variable = {Possible Values}
Fail reset	Fail 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}
Imin	Holding current	A	{[0,1e12]}
Ibreak	Maximum breakable current	A	{[0,1e12]}
Fbov	Forward break over voltage	V	{[0,1e12]}
Rbov	Reverse break over voltage	V	{[0,1e12]}

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

Name	Description
Net_1	Network connection
Net_2	Network connection

Inputs

Name	Description
D	Delay used for precision valves
P	Binary coded firing pulses

Outputs

None

Sensors

Name	Description	Unit
D	Delay used for precision valve, measured from changing point to current time step	s
FailSig	Fail reset signal
I	Diode current	A
Delay	Delay due to forward voltage drop	s
State12	Diode state

GTO + Diode