GTO
Purpose
Ideal GTO with optional forward voltage and on-resistance
Library
Electrical / Power Semiconductors
Description
The Gate Turn Off Thyristor can also be switched off via the gate. Like a normal thyristor it closes when the voltage between anode and cathode is positive and a positive gate signal is applied. It opens when the current becomes negative or the gate signal becomes negative.
Parameters
The following parameters may either be scalars or vectors corresponding to the implicit width of the component:
- Forward voltage
Additional dc voltage \(V_\mathrm{f}\) in volts \((\mathrm{V})\) between anode and cathode when the GTO is conducting. The default is
0.- On-resistance
The resistance \(R_\mathrm{on}\) of the conducting device, in ohms \((\Omega)\). The default is
0.- Initial conductivity
Initial conduction state of the GTO. The GTO is initially blocking if the parameter evaluates to zero, otherwise it is conducting.
- Thermal description
Switching losses, conduction losses and thermal equivalent circuit of the component. For more information see chapter Thermal Modeling. If no thermal description is given, the losses are calculated based on the voltage drop \(v_\mathrm{on} = V_\mathrm{f} + R_\mathrm{on}\cdot i\).
- Thermal interface resistance
The thermal resistance of the interface material between case and heat sink, in \((\mathrm{K}/\mathrm{W})\). The default is
0.- Initial temperature
This parameter is used only if the device has an internal thermal impedance and specifies the temperature of the thermal capacitance at the junction at simulation start. The temperatures of the other thermal capacitances are initialized based on a thermal “DC” analysis. If the parameter is left blank, all temperatures are initialized from the external temperature. See also Temperature Initialization.
Probe Signals
- GTO voltage
The voltage measured between anode and cathode.
- GTO current
The current through the GTO flowing from anode to cathode.
- GTO gate signal
The gate input signal of the GTO.
- GTO conductivity
Conduction state of the internal switch. The signal outputs \(0\) when the GTO is blocking, and \(1\) when it is conducting.
- GTO junction temperature
Temperature of the first thermal capacitor in the equivalent Cauer network.
- GTO conduction loss
Continuous thermal conduction losses in watts \((\mathrm{W})\). Only defined if the component is placed on a heat sink.
- GTO switching loss
Instantaneous thermal switching losses in joules \((\mathrm{J})\). Only defined if the component is placed on a heat sink.