Multi-level power converter state monitoring system and power device loss calculating method

Multi-level power converter state monitoring system and power device loss calculating method

The invention relates to a multi-level power converter state monitoring system and a power device loss calculating method. The multi-level power converter state monitoring system comprises a system controller, a gate pole voltage synchronization sampling module, a collector-emitter voltage/current s...

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Hauptverfasser: SUN QIANG, LYU HAIYING, LI JIN, XU HUANTAO, ZHANG WEIYU, DU YANHONG, MA SHAOHUA, CHEN JIJUN
Format: Patent
Sprache:chi ; eng
Schlagworte:
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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creator SUN QIANG
LYU HAIYING
LI JIN
XU HUANTAO
ZHANG WEIYU
DU YANHONG
MA SHAOHUA
CHEN JIJUN
description The invention relates to a multi-level power converter state monitoring system and a power device loss calculating method. The multi-level power converter state monitoring system comprises a system controller, a gate pole voltage synchronization sampling module, a collector-emitter voltage/current synchronization sampling module, a bottom plate temperature sampling module, and a driving signal trigger and blocking module. The power device loss calculating method comprises the following steps of calculating an IGBT on-state loss, an IGBT open loss, an IGBT turn-off loss, a freewheel diode on-state loss and a freewheel diode reverse recovery loss; and through an IGBT internal thermal model, calculating a temperature rise condition of each layer. In the invention, state parameters of a power device in a multi-level power converter can be collected in real time, a problem of the power device is timely discovered and processed, the multi-level power converter is guaranteed to safely and reliably work, calculating
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subjects MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title Multi-level power converter state monitoring system and power device loss calculating method
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