GTO

Gate Turn-Off Thyristor

Libraries:
Simscape / Electrical / Semiconductors & Converters

Description

The GTO block models a gate turn-off thyristor (GTO). The I-V characteristic of a GTO is such that if the gate-cathode voltage exceeds the specified gate trigger voltage, the GTO turns on. If the gate-cathode voltage falls below the specified gate turn-off voltage value, or if the load current falls below the specified holding-current value, the device turns off.

To define the I-V characteristic of the GTO, set the On-state behavior and switching losses parameter to either Specify constant values or Tabulate. The Tabulate option is available only if you expose the thermal port of the block.

In the on state, the anode-cathode path behaves like a linear diode with forward-voltage drop, V_f, and on-resistance, R_on. However, if you expose the thermal port of the block and parameterize the device using tabulated I-V data, the tabulated resistance is a function of the temperature and current.

In the off state, the anode-cathode path behaves like a linear resistor with a low off-state conductance value, G_off.

The defining Simscape™ equations for the block are:

    if ((v > Vf)&&((G>Vgt)||(i>Ih)))&&(G>Vgt_off)         
        i == (v - Vf*(1-Ron*Goff))/Ron;     
    else         
        i == v*Goff;     
    end

where:

v is the anode-cathode voltage.
Vf is the forward voltage.
G is the gate voltage.
Vgt is the gate trigger voltage.
i is the anode-cathode current.
Ih is the holding current.
Vgt_off is the gate turn-off voltage.
Ron is the on-state resistance.
Goff is the off-state conductance.

Using the Integral Diode parameters, you can include an integral cathode-anode diode. A GTO that includes an integral cathode-anode diode is known as an asymmetrical GTO (A-GTO) or reverse-conducting GTO (RCGTO). An integral diode protects the semiconductor device by providing a conduction path for reverse current. An inductive load can produce a high reverse-voltage spike when the semiconductor device suddenly switches off the voltage supply to the load.

The table shows you how to set the Integral protection diode parameter based on your goals.

Goal	Value to Select	Block Behavior
Prioritize simulation speed.	`Diode with no dynamics`	The block includes an integral copy of the Diode block. To parameterize the internal Diode block, use the Protection parameters.
Precisely specify reverse-mode charge dynamics.	`Diode with charge dynamics`	The block includes an integral copy of the dynamic model of the Diode block. To parameterize the internal Diode block, use the Protection parameters.

Model Gate Port and Thermal Effects

You can choose between physical or electrical ports to control the gate terminal and expose the thermal port to model the heat that switching events and conduction losses generate. To choose the gate-control port, set the Gate-control port parameter to PS or Electrical. To expose the thermal port, set the Modeling option parameter to No thermal port or Show thermal port.

For more information about using thermal ports, see Simulating Thermal Effects in Semiconductors.

Thermal Losses

The figure shows an idealized representation of the output voltage, V_out, and the output current, I_out, of the semiconductor device. The interval in this figure includes the entire nth switching cycle, during which the block turns off and then on.

Switching losses are major sources of thermal loss in semiconductors. During each on-off switching transition, the GTO parasitics store and then dissipate energy.

Switching losses depend on the off-state voltage and the on-state current. When a switching device turns on, the power losses depend on the initial off-state voltage across the device and the final on-state current when the device is in its fully on state. Similarly, when a switching device turns off, the power losses depend on the initial on-state current through the device and the final off-state voltage across the device in the fully off state.

You can choose when to measure the current and voltage that the block uses to calculate the switch-on and switch-off losses. For most circuits, you can make the measurements during the turn-on or turn-off event:

The switch-on loss is E_on(I_TurnOn(n),V_TurnOn(n))
The switch-off loss is E_off(I_TurnOff(n),V_TurnOff(n))

However, you cannot always use these measurements, for example, in these situations:

You are modeling a capacitance across the switching device. For example, you are modeling the protection diode with capacitance or you are using the Lauritzen charge model. The capacitance causes an overshoot transient in the current at device turn-on, which means that you cannot use the measurement I_TurnOn(n) to calculate the switch-on loss. The block requires the value following the transient. Do not model capacitance across the switching device, because this model mixes an abstracted behavior for the semiconductor switching device with detailed physics for the diode. If you must model capacitance across the switching device, you can use the current measurement at the end of the last on-period, I_TurnOff(n-1). To enable this option, select the Use last on-state current from previous cycle for turn-on loss parameter.
You are modeling switching device lead inductance. The inductance causes an overshoot transient in the voltage at device turn-off, which means that you cannot use the measurement V_TurnOff(n) to calculate the switch-off loss. The block requires the value following the transient. Do not model switching device lead inductance, because the time constant associated with lead inductance is typically much smaller than the pulse-width modulation (PWM) period. This smaller time constant means that the simulation requires smaller simulation time steps, slowing down the simulation. If you must model switching device lead inductance, use the voltage measurement at the end of the last off-period, V_TurnOn(n). To enable this option, select the Use last off-state voltage from previous cycle for turn-off loss parameter.

Examine the simulation results to check that the losses behave as you expect. To learn how to log and plot simulation data, see the Log and Plot Simulation Data example. This table defines the names of variables in the logged simulation data that are relevant to switching loss calculations.

Voltages and Currents used to Calculate Switching Losses

Quantity	Variable Name in Logged Simulation Data
V_TurnOn	`zvOn`
I_TurnOn	`ziOn`
V_TurnOff	`zvOff`
I_TurnOff	`ziOff`

This block applies switching losses by stepping up the junction temperature with a value equal to the switching loss divided by the total thermal mass at the junction. You must specify the energy dissipated during a single switch-on and forced commutation switch-off event. You must also specify the corresponding values of the off-state voltage and on-state current at which you quote the losses. You can parameterize the switching losses, depending on the data you have. Use tabulated data if they are available.

To specify a scalar value for the switch-on loss and forced commutation switch-off loss, set the On-state behavior and switching losses parameter to Specify constant values. The Switch-on loss and Forced commutation switch-off loss parameter values set the size of the losses. The block scales the losses by the off-state voltage and the on-state current.
To specify the switch-on loss and forced commutation switch-off loss as a function of the junction temperature and on-state current, set the On-state behavior and switching losses parameter to Tabulate. The Switch-on loss, Eon(Tj,Iak) and Switch-off loss, Eoff(Tj,Iak) parameters set the size of the losses. The block scales the losses by the off-state voltage.

When the current falls below the Holding current parameter value, the device switches off. The Natural commutation rectification loss parameter value defines the switch-off loss. The block does not scale this loss by the off-state voltage or on-state current because it is not possible to know when to measure the starting current or final voltage for the rectification loss.

Reverse recovery loss can be a significant source of thermal loss in diodes. The diode dissipates energy every time it turns off, from its conducting state to the open-circuit state. To model reverse recovery loss:

Set Modeling option to Show thermal port.
Set Integral protection diode to Diode with no dynamics.

If you set the Reverse recovery loss model parameter to Tabulated loss, the value of the Reverse recovery loss table, Erec(Tj, If) parameter specifies the dissipated energy as a function of the junction temperature and the forward current just before the switching event. The off-state voltage linearly scales the losses relative to the Turn-off voltage when measuring recovery loss, Vrec parameter value. The table uses delayed values for the current and voltage. To use a value in the lookup table that is close to the instantaneous value, set the Filter time constant for voltage and current values parameter to a value that is lower than the fastest switching period.

If you set the Reverse recovery loss model parameter to Fixed loss, the value of the Reverse recovery loss parameter specifies the energy dissipated during each turn-off event. If you select the Scale reverse recovery loss with current and voltage parameter, then the block scales this loss value linearly by the on-state current and the off-state voltage. To use scaling values that are close to the instantaneous values, set Filter time constant for voltage and current values to a value that is lower than the fastest switching period.

As an alternative method to model reverse recovery, you can set the Integral protection diode parameter to Diode with charge dynamics. However, this approach requires smaller simulation time steps than using the first approach.

Note

If you use the GTO block as a partially-controlled device, the block records the on-state current once the current is greater than the holding current for a time longer than the value of the Wait time before switch-on current measurement parameter.

For all ideal switching devices, the logged simulation data reports the thermal losses as lastTurnOffLoss, lastTurnOnLoss, and lastReverseRecoveryLoss. These variables include losses as a pulse with an amplitude equal to the energy loss. If you use a script to sum the total losses over a defined simulation period, you must sum the pulse values at each pulse rising edge. Alternatively, you can extract conduction and switching losses from logged data using the ee_getPowerLossSummary and ee_getPowerLossTimeSeries functions.

You can also access the total accumulated switching losses from the accumulatedSwitchingLosses variable in the logged simulation data. This variable sums all switching losses to date, including reverse recovery losses for the diode.

The power_dissipated variable in the logged simulation data does not include switching losses because the block models these losses as instantaneous events. The power_dissipated variable reports ohmic on-state losses.

If you are using a fixed-step solver, the shortest pulse on or pulse off that supports capture of the switching losses is three time steps long. If the pulse is shorter than three steps, the block does not report switching losses.

If you use tabulated data to model the switching losses or reverse recovery losses, check that the temperature and current are in the range you specify. If you do not define a realistic thermal model, for example, if the junction mass or the conductance from the junction to the case is too small, the temperature can exceed the range you specify, causing the block to extrapolate the losses to nonphysical values.

Variables

To set the priority and initial target values for the block variables before simulation, use the Initial Targets section in the block dialog box or Property Inspector. For more information, see Set Priority and Initial Target for Block Variables.

Use nominal values to specify the expected magnitude of a variable in a model. Using system scaling based on nominal values increases the simulation robustness. Nominal values can come from different sources. One of these sources is the Nominal Values section in the block dialog box or Property Inspector. For more information, see System Scaling by Nominal Values.

Examples

Quantifying IGBT Thermal Losses

The generation of a temperature profile based on switching and conduction losses in an insulated-gate bipolar transistor (IGBT). There are two buck converters. For one converter, the IGBT attaches to a Foster thermal model. For the other converter, the IGBT attaches to a Cauer thermal model. The parameters for the thermal models are tuned to give roughly equivalent results. At a simulation time of 50ms, the driving frequency changes from 40kHz to 20kHz, which increases the conduction losses and decreases the switching losses. The change in the losses results in a corresponding change in the temperature of the IGBT.

Open Model

Ports

The figure shows the block port names.

Conserving

expand all

G — Gate terminal
electrical

Port associated with the gate terminal. You can set the port to either a physical signal or electrical port.

A — Anode terminal
electrical

Electrical conserving port associated with the anode terminal.

K — Cathode terminal
electrical

Electrical conserving port associated with the cathode terminal.

H — Thermal port
thermal

Thermal conserving port.

Dependencies

To enable this port, set Modeling option to Show thermal port.

Parameters

expand all

Modeling option — Thermal port visibility
`No thermal port` (default) | `Show thermal port`

Whether to enable the thermal port.

Main

This table shows how the visibility of Main parameters depends on how you configure the Modeling option and On-state behavior and switching losses parameters. To learn how to read this table, see Parameter Dependencies.

Main Parameter Dependencies

Parameters and Options
Modeling option
`No thermal port`	`Show thermal port`
Gate-control port	Gate-control port
Gate trigger voltage, Vgt	Gate trigger voltage, Vgt
Gate turn-off voltage, Vgt_off	Gate turn-off voltage, Vgt_off
Holding current	Holding current
Forward voltage, Vf	On-state behavior and switching losses
Forward voltage, Vf	`Specify constant values`	`Tabulate`
On-state resistance	Forward voltage, Vf	On-state voltage, Vak(Tj,Iak)
Off-state conductance	On-state resistance	Temperature vector, Tj
	Off-state conductance	Anode-cathode current vector, Iak
	Off-state conductance	Off-state conductance

Gate-control port — Whether to specify physical or electrical control port
`PS` (default) | `Electrical`

Whether to specify physical or electrical control port for the switch gate.

On-state behavior and switching losses — On-state current for switching loss data
`Specify constant values` (default) | `Tabulate`

Parameterization method for on-state behavior and switching losses, specified as one of these values:

Specify constant values — Use scalar values to specify the output current, switch-on loss, and switch-off loss data.
Tabulate — Use vectors to specify the output current and temperature data. Use matrices to specify the switch-on loss and switch-off loss data.

Dependencies

See the Main Parameter Dependencies table.

Gate trigger voltage, Vgt — Gate trigger voltage
`6` `V` (default)

Gate-cathode voltage threshold. The device turns on when the gate-cathode voltage is above this value.

Dependencies

See the Main Parameter Dependencies table.

Gate turn-off voltage, Vgt_off — Gate turn-off voltage
`-1` `V` (default)

Gate-cathode voltage threshold. The device turns off when the gate-cathode voltage is below this value.

Dependencies

See the Main Parameter Dependencies table.

Holding current — Holding current
`1` `A` (default)

Current threshold. The device stays on when the current is above this value, even when the gate-cathode voltage falls below the gate trigger voltage.

Dependencies

See the Main Parameter Dependencies table.

Forward voltage, Vf — Forward voltage
`0.8` `V` (default)

Minimum voltage required across the anode and cathode block ports for the gradient of the device I-V characteristic to be 1/R_on, where R_on is the value of On-state resistance.

Dependencies

See the Main Parameter Dependencies table.

On-state resistance — On-state resistance
`0.001` `Ohm` (default)

Rate of change of voltage versus current above the forward voltage. The default value is 0.001.

Dependencies

See the Main Parameter Dependencies table.

Off-state conductance — Off-state conductance
`1e-5` `1/Ohm` (default)

Anode-cathode conductance when the device is off. The value must be less than 1/R, where R is the value of On-state resistance. The default value is 1e-5.

Dependencies

See the Main Parameter Dependencies table.

On-state voltage, Vak(Tj,Iak) — On-state voltage
`[0, .1, .6, .8, 1, 1.3, 1.6, 2, 2.4; 0, .1, .7, 1, 1.2, 1.5, 1.9, 2.4, 2.8]` `V` (default) | matrix of nonnegative scalars

Voltage drop across the device in a triggered conductive state. This parameter is a function of temperature and final on-state output current.

Dependencies

See the Main Parameter Dependencies table.

Temperature vector, Tj — Temperature values
`[298.15, 398.15]` `K` (default) | vector

Temperature values at which you quote the on-state voltage.

Dependencies

See the Main Parameter Dependencies table.

Anode-cathode current vector, Iak — Anode-cathode current vector
`[0, .1, 1, 5, 10, 20, 40, 70, 100]` `A` (default)

Anode-cathode currents for which the on-state voltage is defined. The first element must be zero. Specify this parameter using a vector quantity.

Dependencies

See the Main Parameter Dependencies table.

Switching Losses

To enable these parameters, set Modeling option to Show thermal port.

Switch-on loss — Switch-on loss
`22.86e-3` `J` (default) | positive scalar

Energy dissipated during a single switch-on event.

Dependencies

To enable this parameter, set On-state behavior and switching losses to Specify constant values.

Forced commutation switch-off loss — Forced commutation switch-off loss
`17.14e-3` `J` (default) | positive scalar

Energy dissipated during a single switch-off event.

Dependencies

To enable this parameter, set On-state behavior and switching losses to Specify constant values.

Natural commutation rectification loss — Natural commutation rectification loss
`10e-3` `J` (default) | positive scalar

Rectification loss applied at the point that the block switches off when the current falls below the Holding current. Specify this parameter using a scalar quantity.

Off-state voltage for switching loss data — Off-state voltage for losses data
`300` `V` (default) | positive scalar

The output voltage of the device during the off state. This is the blocking voltage at which the switch-on loss and switch-off loss data are defined.

On-state current for switching loss data — Output current
`600` `A` (default) | positive scalar

Output currents for which the switch-on loss, switch-off loss, and on-state voltage are defined. The first element must be zero. Specify this parameter using a scalar quantity.

Note

This parameter is measured at the point that the gate voltage falls below the Gate trigger voltage, Vgt. The turn-on pulse is longer than the time it takes the current to reach its maximum value.

Dependencies

To enable this parameter, set On-state behavior and switching losses to Specify constant values.

Switch-on loss, Eon(Tj,Iak) — Switch-on loss
`[0, .0024, .024, .12, .2, .48, 1.04, 2.16, 3.24; 0, .003, .03, .15, .25, .6, 1.3, 2.7, 4.05] * 1e-3` `J` (default) | matrix of nonnegative scalars

Energy dissipated during a single switch-on event as a function of temperature and final on-state output current.

Dependencies

To enable this parameter, set On-state behavior and switching losses to Tabulate.

Switch-off loss, Eoff(Tj,Iak) — Switch-off loss
`[0, .0007, .0066, .033, .066, .17, .33, .83, 1.5; 0, .001, .01, .05, .1, .25, .5, 1.2, 2.2] * 1e-3` `J` (default) | matrix of nonnegative scalars

Energy dissipated during a single switch-off event as a function of temperature and final on-state output current.

Dependencies

To enable this parameter, set On-state behavior and switching losses to Tabulate.

Temperature vector for switching losses, Tj — Temperature for switching losses
`[298.15, 398.15]` `K` (default) | vector

Temperature values at which you quote the switch-on loss and switch-off loss.

Dependencies

To enable this parameter, set On-state behavior and switching losses to Tabulate.

Anode-cathode current vector for switching losses, Iak — Anode-cathode current vector for switching losses
`[0, .1, 1, 5, 10, 20, 40, 70, 100]` `A` (default) | vector of nonnegative scalars

Anode-cathode currents at which you quote the switch-on loss and switch-off-loss. The first element must be zero.

Dependencies

To enable this parameter, set On-state behavior and switching losses to Tabulate.

Wait time before switch-on current measurement — Wait time before switch-on current measurement
`0` `s` (default) | nonnegative scalar

Time to wait before recording the on-state current if you use the GTO block as a partially-controlled device. If you use the GTO block as a fully-controlled device, set this parameter to 0.

Use last on-state current from previous cycle for turn-on loss — Option to use last on-state current from previous cycle for turn-on loss
`Off` (default) | `On`

Since R2024a

Option to use the last on-state current from previous cycle for turn-on loss.

Use last off-state current from previous cycle for turn-offloss — Option to use last off-state current from previous cycle for turn-off loss
`Off` (default) | `On`

Since R2024a

Option to use the last off-state current from previous cycle for turn-off loss.

Integral Diode

Integral protection diode — Integral protection diode
`External diode` (default) | `Diode with no dynamics` | `Diode with charge dynamics`

Block integral protection diode.

The diodes you can select are:

Diode with no dynamics
Diode with charge dynamics

Diode model — Diode model
`Piecewise Linear` (default) | `Tabulated I-V curve`

Select one of these diode models:

Piecewise Linear — Use a piecewise linear model for the diode, as described in Piecewise Linear Diode. This is the default method.
Tabulated I-V curve — Use tabulated forward bias I-V data plus fixed reverse bias off conductance.

Dependencies

This parameter is visible only when the thermal port is exposed and the Integral protection diode parameter is set to Diode with no dynamics or Diode with charge dynamics.

Table type — Tabulated function
`Table in If(Tj,Vf) form` (default) | `Table in Vf(Tj,If) form`

Whether to tabulate the current as a function of temperature and voltage or the voltage as a function of temperature and current.

Dependencies

This parameter is visible only when the thermal port is exposed and the Integral protection diode parameter is set to Diode with no dynamics or Diode with charge dynamics and Diode model is set to Tabulated I-V curve.

Reverse I-V characteristics type — Type of reverse I-V characteristics
`Specify off conductance` (default) | `Tabulate`

Since R2024a

Whether to specify the reverse I-V characteristics by using the diode off conductance or by tabulating the current as a function of temperature and voltage or the voltage as a function of temperature and current.

Dependencies

Forward voltage — Forward voltage
`0.8` `V` (default)

Minimum voltage required across the + and - block ports for the gradient of the diode I-V characteristic to be 1/R_on, where R_on is the value of On resistance.

Dependencies

To enable this parameter:

If the thermal port is hidden, set Integral protection diode to Diode with no dynamics or Diode with charge dynamics.
If the thermal port is exposed, set Integral protection diode to Diode with no dynamics or Diode with charge dynamics and Diode model to Piecewise linear.

On resistance — On resistance
`0.001` `Ohm` (default)

Rate of change of voltage versus current above the Forward voltage.

Dependencies

To enable this parameter:

If the thermal port is hidden, set Integral protection diode to Diode with no dynamics or Diode with charge dynamics.
If the thermal port is exposed, set Integral protection diode to Diode with no dynamics or Diode with charge dynamics and Diode model to Piecewise linear.

Forward currents, If(Tj,Vf) — Vector of forward currents
`[.07, .12, .19, 1.75, 4.24, 7.32, 11.2; .16, .3, .72, 2.14, 4.02, 6.35, 9.12]` `A` (default) | nonnegative vector

Forward currents. This parameter must be a vector of at least three nonnegative elements.

Dependencies

To enable this parameter, expose the thermal port and set Diode model to Tabulated I-V curve and Table type to Table in If(Tj,Vf) form.

Junction temperatures, Tj — Vector of junction temperatures
`[25, 125]` `degC` (default)

Vector of junction temperatures. This parameter must be a vector of at least two elements.

Dependencies

To enable this parameter, expose the thermal port and set Diode model to Tabulated I-V curve.

Forward voltages, Vf — Vector of forward voltages
`[.5, .7, .9, 1.3, 1.7, 2.1, 2.5]` `V` (default)

Vector of forward voltages. This parameter must be a vector of at least three nonnegative values.

Dependencies

To enable this parameter, expose the thermal port and set Diode model to Tabulated I-V curve and Table type to Table in If(Tj,Vf) form.

Forward voltages, Vf(Tj,If) — Vector of forward voltages
`[.9, 1.15, 1.25, 1.5, 1.75, 2.17, 2.6, 2.85; .58, .68, .75, 1.1, 1.38, 1.77, 2.27, 2.7]` `V` (default) | nonnegative vector

Forward voltages. This parameter must be a vector of at least three nonnegative elements.

Dependencies

To enable this parameter, expose the thermal port and set Diode model to Tabulated I-V curve and Table type to Table in Vf(Tj,If) form.

Forward currents, If — Vector of forward currents
`[.1, .2, .5, 1, 2, 4, 7, 10]` `A` (default)

Vector of forward currents. This parameter must be a vector of at least three nonnegative values.

Dependencies

To enable this parameter, expose the thermal port and set Diode model to Tabulated I-V curve and Table type to Table in Vf(Tj,If) form.

Reverse currents, Ir(Tj,Vr) — Vector of reverse currents
`[1e-06, 2e-06, 5e-06, 1e-05, 2.5e-05, 5e-05, .0001; 2e-06, 5e-06, 1e-05, 4e-05, 8e-05, .0002, .0005]` `A` (default) | nonnegative vector

Since R2024a

Reverse currents. This parameter must be a vector of at least three nonnegative elements.

Dependencies

To enable this parameter, set:

Modeling option to Show thermal port
Integral protection diode to Diode with no dynamics or Diode with charge dynamics
Diode model to Tabulated I-V curve
Table type to Table in If(Tj,Vf) form
Reverse I-V characteristics to Tabulate

Reverse voltages, Vr — Vector of reverse voltages
`[10, 20, 40, 50, 70, 80, 100]` `V` (default) | nonnegative vector

Since R2024a

Vector of reverse voltages. This parameter must be a vector of at least three nonnegative values.

Dependencies

To enable this parameter, set:

Modeling option to Show thermal port
Integral protection diode to Diode with no dynamics or Diode with charge dynamics
Diode model to Tabulated I-V curve
Table type to Table in If(Tj,Vf) form
Reverse I-V characteristics to Tabulate

Reverse voltages, Vr(Tj,Ir) — Vector of reverse voltages
`[10, 100, 200, 250, 300, 325, 350; 10, 70, 160, 220, 270, 300, 320]` `V` (default) | nonnegative vector

Since R2024a

Reverse voltages. This parameter must be a vector of at least three nonnegative elements.

Dependencies

To enable this parameter, set:

Modeling option to Show thermal port
Integral protection diode to Diode with no dynamics or Diode with charge dynamics
Diode model to Tabulated I-V curve
Table type to Table in Vf(Tj,If) form
Reverse I-V characteristics to Tabulate

Reverse currents, Ir — Vector of reverse currents
`[1e-06, 2e-06, 5e-06, 1e-05, 2e-05, 5e-05, .0001]` `A` (default) | nonnegative vector

Since R2024a

Vector of reverse currents. This parameter must be a vector of at least three nonnegative values.

Dependencies

To enable this parameter, set:

Modeling option to Show thermal port
Integral protection diode to Diode with no dynamics or Diode with charge dynamics
Diode model to Tabulated I-V curve
Table type to Table in Vf(Tj,If) form
Reverse I-V characteristics to Tabulate

Off conductance — Off conductance
`1e-5` `1/Ohm` (default)

Conductance of the reverse-biased diode.

Dependencies

This parameter is visible only when the Integral protection diode parameter is set to Diode with no dynamics or Diode with charge dynamics and Reverse I-V characteristics type is set to Specify off conductance.

Reverse recovery loss model — Model for reverse recovery loss
`Fixed loss` (default) | `Tabulated loss`

Since R2023a

Whether to model fixed or tabulated reverse recovery losses.

Dependencies

To enable this parameter, set the Modeling option parameter to Show thermal port and set the Integral protection diode parameter to Diode with no dynamics.

Reverse recovery loss — Reverse recovery loss
`0` `J` (default) | nonnegative scalar

Since R2023a

Dissipated energy in each turn-off event, regardless of the state of the diode before or after the switching event.

Dependencies

To enable this parameter, set the Reverse recovery loss model parameter to Fixed loss.

Scale reverse recovery loss with current and voltage — Option to scale reverse recovery loss
`On` (default) | `Off`

Since R2023b

Option to scale reverse recovery loss with current and voltage.

Dependencies

To enable this parameter:

Set Modeling option to Show thermal port.
Set Integral protection diode to Diode with no dynamics.
Set Reverse recovery loss model to Fixed loss.

Reverse recovery loss table, Erect(Tj), If — Reverse recovery loss
`zeros(2,3)` `J` (default) | vector of nonnegative scalars

Since R2023a

Dissipated energy as a function of the forward current If just before the switching event, and final off-state voltage once the diode is in off state.

Dependencies

To enable this parameter, set the Reverse recovery loss model parameter to Tabulated loss.

Temperature vector for recovery loss table, Tj — Temperature vector for recovery loss table
`[298.15 398.15]` `K` (default) | vector

Since R2023a

Temperature vector used to tabulate reverse recovery loss.

Dependencies

To enable this parameter, set the Reverse recovery loss model parameter to Tabulated loss.

Forward current vector for recovery loss table, If — Forward current vector for recovery loss table
`[.1, 1, 10]` `K` (default) | vector of nonnegative scalars

Since R2023a

Forward current vector used to tabulate reverse recovery loss.

Dependencies

To enable this parameter, set the Reverse recovery loss model parameter to Tabulated loss.

Forward current when measuring recovery loss, Irec — Forward current when the block measures recovery loss
`10` `A` (default) | positive scalar

Since R2023b

Forward current through the diode before the reverse recovery event that the block uses to measure recovery loss.

Dependencies

To enable this parameter, set Reverse recovery loss model to Fixed loss and select the Scale reverse recovery loss with current and voltage parameter.

Turn-off voltage when measuring recovery loss, Vrec — Turn-off voltage when measuring recovery loss
`10` `V` (default) | positive scalar

Since R2023a

Voltage across the diode after the reverse recovery event used to measure recovery loss.

Dependencies

To enable this parameter, choose from one of these options:

Set Reverse recovery loss model to Fixed loss and select the Scale reverse recovery loss with current and voltage parameter.
Set the Reverse recovery loss model parameter to Tabulated loss.

Filter time constant for voltage and current values — Filter time constant for voltage and current values
`1 / 1000 / 100` `s` (default) | positive scalar

Since R2023a

Filter time constant for voltage and current values used to calculate reverse recovery loss. Set this parameter to a value that is lower than the fastest switching period.

Dependencies

To enable this parameter, choose from one of these options:

Set Reverse recovery loss model to Fixed loss and select the Scale reverse recovery loss with current and voltage parameter.
Set the Reverse recovery loss model parameter to Tabulated loss.