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S
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Series in
Microelectronics
edited by Qiuting Huang
Andreas Schenk
Mathieu Maurice Luisier
Bernd
Witzigmann
Vol. 139: Jan Thalheim,
Control Strategies for Balancing
of Series and Parallel Connected
IGBT/Diode Modules.
2004. XVII,
186 pages, EUR 64,00.
ISBN
3-89649-890-8
Abstract:
This thesis investigates
control methodologies for series and parallel connected IGBT/diode modules. It
is proposed to provide each IGBT with primary local control to monitor and
adjust the IGBT's static and dynamic behavior. Secondary (global) control
synchronizes the operation of multiple IGBTs. A globally synchronous clock can
also be derived locally. This makes it possible to use low-cost low-bandwidth
data links between series-connected units. Thereby, a flexible master-slave
approach can avoid the need of dedicated global control. That is, the entire
system is manageable by the local gate drive circuitry. A prototype ASIC has
been fabricated in CMOS technology with high-voltage extension. The driver is
partitioned into fourteen clusters with a measured gate current capability of
one Ampere each. A classification of the IGBT's collector-emitter voltage and
collector current signals allows for real-time reconfiguration of the
controller structure to optimize the dynamic response of the system. The
conduction state and the recovery speed of freewheeling diodes are controlled
by the voltage drop across the DC link inductance, which is locally estimated
at each IGBT.
About the Author:
Jan Thalheim received the Dipl.lng. (M.Sc.)
degree in electrical engineering from the University of Magdeburg, Germany, in
1996. His diploma thesis is on new concepts of auxiliary power supply via CAN
bus data lines. He joined the Integrated Systems Laboratory (IIS) of the Swiss
Federal Institute of Technology (ETH) Zurich, Switzerland as a research and
teaching assistant. Main goal was the development of a Synchronous Intelligent
Gate Unit (SIGU). SIGU is aimed on acceleration and synchronizing the operation
of series and parallel connected IGBTs. In 2002 he joined CT-Concept Technology
Ltd., where he heads the ASIC design group.
Keywords:
Control Strategies for Balancing, Series and Parallel Connected IGBT/Diode
Modules.
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