Monitoring of paralleled IGBT/diode modules

Hofer-Noser, P.; Karrer, N.

doi:10.1109/63.761687

Cited by 50 publications

(13 citation statements)

References 4 publications

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“…It is, however, worth mentioning that the synchronization error is just one of the causes for asynchronous switchings. For example, differences in gate driver and power semiconductor device parameters may cause asynchronous switchings even if the switching patterns of the parallelconnected units were accurately synchronized [13]. Despite this, an accurate synchronization is essential, since it affects the sizing of the intermodule reactors, and this way helps to decrease the cost of the overall system [10].…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Time-stamping-based synchronization of power electronics building block systems

Laakkonen

Itkonen

Luukko

et al. 2009

2009 35th Annual Conference of IEEE Industrial Electronics

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Integrated design has become a very attractive choice for modern power electronic systems. One way to introduce modularity to integrated designs is to utilize intelligent power electronics building blocks as a base for power electronics systems. The main reason for moving toward a building-blockbased design is that the traditional centralized control structure does not provide much flexibility and reusability. A buildingblock-based design needs a distributed control scheme that sets new challenges to system design. Distributed control of building blocks requires a deterministic, real-time communication scheme and accurate synchronization. The synchronization becomes an issue especially with ring-based control topologies. In this paper, a flexible time-stamping-based synchronization scheme for a cascaded ring communication topology is proposed. Further, a communication scheme suitable for building-block-based designs is presented. The achieved synchronization accuracy is analyzed in relation to a parallel connection of power semiconductors.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Time-stamping-based synchronization of power electronics building block systems

Laakkonen

Itkonen

Luukko

et al. 2009

2009 35th Annual Conference of IEEE Industrial Electronics

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“…It is therefore possible to have several IGBTs switching on or off at the same or nearly the same time. In the literature one can find information on paralleled IGBTs [1,2], but no detailed discussion about the conditions at multicommutation. Because the events of multicommutation have a slow repetition rate a significant effect on the IGBT power losses is not to expect.…”

Section: Operation Of Large Inverter Systemsmentioning

confidence: 99%

Multicommutation of IGBTs in large inverters

Bakran

Helsper

Eckel

et al. 2005

2005 European Conference on Power Electronics and Applications

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Large inverter-systems are characterized by a significant number of parallel IGBTs operating on the same dc-link. The IGBT-phases are cross coupled by their mutual stray inductance. This paper investigates the special effects occurring due to nearly simultaneous switching of multiple IGBTs. This operation can cause a significant increase in stress on the IGBT and on the free wheel diode. Countermeasures to cope with these problems will be discussed.

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“…The active gate control principle from [2]- [4] is adapted to the prototype in this paper. The conclusions have been applied to an actual 160kW/380V converter.…”

Section: Introductionmentioning

confidence: 99%

“…But the maximal power ratings of IGBT must be reduced. In [2] and [3], an active gate control method for current balancing based on a prototype with parallel-connected IGBTs was presented. The switching times and gate voltages of each IGBT can be adjusted depending on the transient and static currents.…”

Section: Introductionmentioning

confidence: 99%

Current sharing of IGBT modules in parallel with thermal imbalance

Wang

Zhengming

Yuan

2010

2010 IEEE Energy Conversion Congress and Exposition

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For large current, switching devices such as MOSFET and IGBT, often have to be connected in parallel. Due to this reason, derating and preselection of the switching devices become necessary to develop high-power converters. The current imbalance can be produced by stray inductances, device characteristic difference or asymmetric circuit. Moreover, thermal imbalance is anther important reason for current balancing. The static and transient characteristics of an IGBT vary sensitively with its junction temperature. This paper focuses on the current sharing of IGBTs in parallel with thermal imbalance. In this paper, an active gate control method which can achieve current balancing of the IGBTs in parallel with thermal imbalance, is explained and verified by experiments. This method can be applied to an actual 160kW/380V power electronics converter prototype for improving the utilization of the switching devices and enhancing system reliability.

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Monitoring of paralleled IGBT/diode modules

Cited by 50 publications

References 4 publications

Time-stamping-based synchronization of power electronics building block systems

Time-stamping-based synchronization of power electronics building block systems

Multicommutation of IGBTs in large inverters

Current sharing of IGBT modules in parallel with thermal imbalance

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