Dr.-Ing.  Andreas Liske Andreas Liske

Dr.-Ing. Andreas Liske

Title Image Source Short Description

Invited Talk at IEEE 7th Southern Power Electronics Conference (SPEC), 05-08th December, 2022, Fiji

Invited Talk at "Wangener Automotive Symposium – Inverter Trends & Technology"

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society

This paper analyzes how a previously presentedadaptive open loop gate driver handles fault currents. Whencontrolling insulated gate bipolar transistors (IGBTs), it isessential to ensure safe operation in the whole operating range.Most important, the gate driver must be able to safely turn OFFa unacceptably high current like a short-circuit current. Such afault generates a current of unknown magnitude, which has tobe switched off as safe and slow as possible. A special shutdownmode of the investigated open loop gate driver is presented in thispaper, which makes it possible to safely shut down a fault currentwithout knowing the actual operating point of the IGBT. Basedon measurement results it is shown that all currents, includingdesaturation of the IGBT can be safely turned OFF.

Dissertation an der Fakultät für Elektrotechnik und Informationstechnik (ETIT) des Karlsruher Instituts für Technologie (KIT)

KITopen-ID: 1000121303

DOI: 10.5445/IR/1000121303

Vortrag beim ECPE-Cluster-Seminar "Echtzeitanalyse und Leistungsmessung von elektrischen Maschinen und Stromrichtern"

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe),

DOI: 10.23919/EPE.2019.8915548

This paper presents an improved Least-Squares-Estimator for the fast, non-recursive online measurement of the first derivative and absolute value of a piecewise linear oversampled current signal. Core topic is the partially online calculation of the pseudoinverse matrix in combination with an optimized small lookup table, minimizing memory requirements significantly.

2019 21th European Conference on Power Electronics and Applications (EPE'19 ECCE Europe)

This paper presents a new gate driver concept that allows an online, open-loop adjustment of the switching behavior of power semiconductors during operation. An inductive impedance instead of an ohmic impedance enables the required adjustable gate current and thus the desired gate voltage curve. The driver can individually adapt the switching behavior of the transistor to each individual switching edge. Thus for example the dv/dt and di/dt can be influenced, whereby the EMI behavior, the reverse recovery rate, the occurring overvoltage or the switching losses can also be influenced. The new gate driver was compared to a conventional resistive gate driver and the measurement results clearly show the advantages of the proposed driver concept.

2019 21th European Conference on Power Electronics and Applications (EPE'19 ECCE Europe)

The 2018 International Power Electronics Conference, IPEC'18 ECCE Asia, Niigata, Japan


2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS), Honolulu, HI, 2017, pp. 715-720.
DOI: 10.1109/PEDS.2017.8289261

In this paper an algorithm is presented how the current slopes of the freewheeling switching states of an VSI- driven 3-phase isotropic synchronous machine can be obtained by only evaluating the measured current slopes during the two applied active switching states. This enables the identification of the freewheeling current slopes in operating conditions where the freewheeling switching states are too short for a direct measurement. Notably, the use of the “Direct Adaptive Current Control” in the overmodulation range is made possible with the proposed technique.

IECON 2014 - 40th Annual Conference on IEEE Industrial Electronics Society

This paper presents a direct, adaptive and parameter-free current control scheme that is independent of the motor type and doesn’t need any machine parameters. A given setpoint can be reached accurately within one switching cycle.

IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society, Melbourne

This  paper  presents  a  dynamic  average  model  of
the  Quasi-Z-Source  Inverter  (QZSI),  based  on  the  short  term
average values over one PWM-period, and the analysis of the
possible switching states that can occur in the QZSI. The model
is considerably descriptive since the modeling has been performed
by analyzing the physical and functional relations with only little
mathematical  complexity.  Another  advantage  of  the  proposed
model is that the load current only acts as a disturbance input,
and is not directly linked with the model structure itself. This
allows  a  separate  examination  of  either  command  input  or
disturbance response and makes the model independent of the
given load. The model has been tested successfully in conjunction
with  an  adequate  cascade  control  loop  design  and  a  QZSI-
prototype in hardware.

Vorlesungen / Übungen
title type semester place
Lecture (V)/Tutorial (Ü) SS 2024

11.10 Engelbert-Arnold-Hörsaal (EAS)

lecture Wintersemester 8C8D1596A76E43C4B3E53463F7B46E61
Vorlesung 8C8D1596A76E43C4B3E53463F7B46E61
internship kl. HS ETI, LAbor Zwischengeschoss ETI