IGBT

This reference section describes the properties and features of the IGBT converter component of Typhoon HIL's software.

Important: It is recommended to consider using existing converter component for high demanding applications and for highest fidelity before incorporating a IGBT component . If using IGBT component, it is recommended to use LC model switch. Please consult our Knowledgebase article on the recommended uses of the IGBT component and how to gain access to it.

A block diagram and input parameters for an IGBT are given in Table 1.

Table 1. IGBT component in Schematic Editor
component	component dialog window	component parameters
Figure 1. IGBT		Control source (Digital inputs, Internal modulator, Model) S1 (digital input address) S1_logic (active high, active low) Weight = 1

There are two implementations available for the IGBT: modeled as LC model switch, which is the preferred and also the default option, or as an ideal switch (Ron = 0, Roff = inf), which is available through special toolbox.

LC switch is modeled as a small inductance while conducting and a small capacitances while not-conducting. Weight of IGBT modeled as an LC switch switch is 0.The parameter resistance and the simulation step are defining the actual inductance and capacitance values according to the following equations:

$L = T s ∙ R$

$C = \frac{T s}{R}$

Where L and C are the calculated inductance and capacitance, Ts is the simulation step of electrical part of the model, R is the set resistance value.

If an ideal switch model is used, IGBT is modeled as a short circuit when conducting and an open circuit when not conducting. In this case, a parallel snubber circuit can be defined. It can be a resistance or a series connection of a resistor and capacitor. These options are shown in Figure 2.

Figure 2. R-C snubber option in case of ideal switch model of an IGBT.

IGBT can be controlled from Digital input, through Internal modulator, or directly from control panel.

Digital inputs, when selected for Control parameter, enables the user to assign gate drive inputs to any of the digital input pins (from 1 to 32). For example, if S1 is assigned to 1, the digital input pin 1 will be routed to the S1 switch gate drive. In addition, the S1_logic parameter selects either active high (High-level input voltage VIH turns on the switch), or active low (Low-level input voltage V_IL turns on the switch) gate drive logic, depending on the user’s external controller design.

Selecting Internal modulator as the Control parameter, enables use of the internal PWM modulator for driving S1 switch instead of digital input pins. In this configuration, two additional component inputs will be present. The En input is used to enable/disable the internal PWM modulator, while In is used as a reference signal input.

Model control, when selected for Control parameter, enables the user to set the IGBT gate drive signals directly from signal processing model. The input pin appear on the gate of the IGBT. When controlled from the model, logic is always active high.

Note: Ideal implementation of IGBT component is available through special toolbox, which can be provided on request.

Digital Alias

If a converter is controlled by digital inputs, an alias for every digital input used by the converter will be created. Digital input aliases will be available under the Digital inputs list alongside existing Digital input signals. The alias will be shown as Converter_name.Switch_name, where Converter_name is name of the converter component and Switch_name is name of the controllable switch in the converter.