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IGBT Chopper (High-Side Switch with Reverse Diode)

Purpose

Buck converter IGBT module with reverse diode

Library

Electrical / Power Modules

Description

pict

This power module implements a chopper used in buck converters. It offers two configurations:

Switched The power semiconductors inside the module are modeled with ideal switches. The IGBT is controlled with a logical gate signal; it is on if the gate signal is not zero. For compatibility with the averaged configuration it is recommended to use the value 1 for non-zero gate signals.

Averaged The module as a whole is modeled with controlled voltage and current sources. The electrical input of the chopper has current source behavior and must be connected to a capacitor or voltage source. The output terminal is typically connected to an inductor. The control input is the relative on-time of the IGBT with values between 0 and 1.

In the average configuration the chopper can be operated in two ways:

In both use cases, the average implementation supports continuous and discontinuous conduction mode.

Since the duty cycle is simulated accurately even with relatively large time steps, the average configuration is particularly well suited for real-time simulations with high switching frequencies. If the reversed diode is not needed, the alternative chopper module is preferred to minimize model complexity.

Parameter

Configuration
Switched or averaged circuit model.