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10. Comparison of 1700-V SiC-MOSFET and Si-IGBT Modules Under Identical Test Setup Conditions.

Author

Fuentes, Carlos D., Kouro, Samir, and Bernet, Steffen

Subjects
METAL oxide semiconductor field-effect transistors, SILICON carbide, ELECTRIC inductance, BIPOLAR transistors
Abstract

In this article, a detailed hard switching behavior comparison between a 1700-V silicon carbide metal-oxide-semiconductor field-effect-transistor and a 1700-V silicon insulated-gate bipolar-transistor module was performed in an identical low inductance commutation circuit for comparable driving conditions. To accomplish this, devices using same module formats were used and carefully selected to match thermal characteristics in the exact same commutation circuit. Furthermore, a simulation of the modules in inverter operation based on the experimental results and complimented by datasheet based on-state values and Foster thermal models has been performed to study losses, junction temperatures, and current utilization. These results are further discussed highlighting advantages and limitations regarding these state-of-the-art SiC devices versus relative cost when contrasted with a comparable Si-based device. [ABSTRACT FROM AUTHOR]

Published
2019
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18. Input Filter for a Power Electronics Transformer in a Railway Traction Application.

Author

Aceiton, Roberto, Weber, Jens, and Bernet, Steffen

Subjects
SEMICONDUCTORS, ENERGY conversion, HARMONIC suppression filters, ELECTRIC inductors, RAILROADS, PROPULSION systems
Abstract

The need for lighter and smaller railway traction drives and recent advances in power semiconductor technology have resulted in a new energy conversion paradigm, one without the classical heavy and bulky line-frequency transformer. Several multilevel topologies have been introduced over the past years, all having in common the use of medium-frequency (MF) energy conversion to reduce the weight and volume of the magnetic components. This paper is concerned with the design of the input filter for an MF traction converter, focusing on a solution that minimizes the filter's overall mass. Two filter topologies are investigated, namely a single-pole filter (inductor) and a passively damped $LCL$ filter. The paper first describes the requirements to be fulfilled, establishes the spectrum to consider for the design, and proposes a method to determine the initial parameters of the filter's components. The results show that an $LCL$ -type filter achieves considerable weight savings in comparison to the single-pole solution. [ABSTRACT FROM AUTHOR]

Published
2018
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30. Selective Harmonic Elimination Model Predictive Control for Multilevel Power Converters.

Author

Aguilera, Ricardo P., Acuna, Pablo, Lezana, Pablo, Konstantinou, Georgios, Wu, Bin, Bernet, Steffen, and Agelidis, Vassilios G.

Subjects
CONVERTERS (Electronics), HARMONIC analysis (Mathematics), PULSE modulation, STEADY state conduction, COST functions
Abstract

In this study, a model predictive control (MPC) strategy that combines finite-control-set MPC with selective harmonic elimination (SHE) modulation pattern in its formulation is proposed to govern multilevel power converters. Based on a desired operating point for the system state (converter current reference), an associated predefined SHE voltage pattern is obtained as a required steady-state control input reference. Then, the cost function is formulated with the inclusion of both system state and control input references. According with the proposed reference and cost function formulation, the predictive controller prefers to track the converter output current reference in transients, while preserving the SHE voltage pattern in steady state. Hence, as evidenced by experimental results, a fast dynamic response is obtained throughout transients while a predefined voltage and current spectrum with low switching frequency is achieved in steady state. [ABSTRACT FROM PUBLISHER]

Published
2017
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