IGBT Converter (3ph)
Purpose
3-phase IGBT converter
Library
Electrical / Converters
Description
Implements a three-phase two-level IGBT converter with reverse diodes. The gate input is a vector of three signals - one per leg. The upper IGBT, connected to the positive dc level, is on if the corresponding gate signal is positive. The lower IGBT is on if the gate signal is negative. If the gate signal is zero both IGBTs in the leg are switched off.
You can choose between two different converter models:
- The basic IGBT Converter is modeled using the component IGBT with Diode. PLECS needs only six internal switches to represent this converter, so the simulation is faster compared to the detailed converter. No electrical parameters can be entered, but the thermal losses may be specified.
- The IGBT Converter with Parasitics is based on individual IGBT and Diode components. In this model you may specify all electrical and thermal parameters separately for the IGBTs and the diodes.
Note Due to the switching conditions of the IGBT with Diode, this device cannot be turned off actively while the current is exactly zero. This may result in unexpected voltage waveforms if the converter is not loaded.
To resolve this problem, either use the IGBT Converter with Parasitics, or allow a small non-zero load current to flow by connecting a large load resistance to the converter.
The electrical circuit for the converter is shown below:
Parameters
For a description of the parameters see the documentation of the IGBT with Diode, the IGBT and the Diode.
Probe Signals
The two-level IGBT converters provide six or twelve probe signals, each a vector containing the appropriate quantities of the individual devices: voltage, current, conductivity, conduction loss and switching loss. The vector elements are ordered top-to-bottom, left-to-right: a+, a-, b+, b-, c+, c-.