145 citations · 354 across the 11 of their papers we have counts for
11 papers
Asymptotic tracking by funnel control with internal models
Thomas Berger, Christoph M. Hackl, Stephan Trenn
Funnel control achieves output tracking with guaranteed tracking performance for unknown systems and arbitrary reference signals. In particular, the tracking error is guaranteed to…
Continuous Control Set Nonlinear Model Predictive Control of Reluctance Synchronous Machines
Andrea Zanelli, Julian Kullick, Hisham Eldeeb +3
In this paper we describe the design and implementation of a current controller for a reluctance synchronous machine based on continuous set nonlinear model predictive control. A c…
Modified second-order generalized integrators with modified frequency locked loop for fast harmonics estimation of distorted single-phase signals (LONG VERSION)
Christoph M. Hackl, Markus Landerer
This paper proposes modified Second-Order Generalized Integrators (mSOGIs) for a fast estimation of all harmonic components of arbitrarily distorted single-phase signals such as vo…
Generic machine identification and maximum efficiency operation of induction machines
Julian Kullick, Christoph M. Hackl
This paper proposes an advanced machine identification method for inverter fed squirrel-cage induction machines, based on steady-state measurements in the rotor flux oriented dq-re…
Speed-sensorless state feedback control of induction machines with LC filter
Julian Kullick, Christoph M. Hackl
A speed-sensorless state feedback controller for induction machines (IMs) with LC filter is proposed. The estimation of speed and remaining states is based on a speed-adaptive obse…
Full- & Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent-Magnet Synchronous Generator
Christoph M. Hackl, Martin Pfeifer, Korbinian Schechner +2
Wind energy is an integral part of nowadays energy supply and one of the fastest growing sources of electricity in the world today. Accurate models for wind energy conversion syste…
Modeling and control of permanent-magnet synchronous generators under open-switch converter faults
Christoph M. Hackl, Urs Pecha, Korbinian Schechner
The mathematical modeling of open-switch faults in two-level machine-side converters and the fault-tolerant current control of isotropic permanent-magnet synchronous generators are…
On the optimal feedforward torque control problem of anisotropic synchronous machines: Quadrics, quartics and analytical solutions
Hisham Eldeeb, Christoph M. Hackl, Lorenz Horlbeck +1
The optimal feedforward torque control problem is tackled and solved analytically for synchronous machines while stator resistance and cross-coupling inductance are explicitly cons…
On the equivalence of proportional-integral and proportional-resonant controllers with anti-windup
Christoph M. Hackl
It is shown that proportional-integral (PI) control in the synchronously rotating (d, q)-reference frame and proportional-resonant (PR) control in the stationary (α, \b{eta})-refer…
Non-ideal torque control of wind turbine systems: Impacts on annual energy production
Christoph M. Hackl, Korbinian Schechner
We discuss non-ideal torque control in wind turbine systems (WTS). Most high-level controllers generate a reference torque which is then send to the underlying electrical drive sys…
Nonlinear PI current control of reluctance synchronous machines
C. M. Hackl, M. J. Kamper, J. Kullick +1
This paper discusses nonlinear proportional-integral (PI) current control with anti-windup of reluctance synchronous machines (RSMs) for which the flux linkage maps are known. The…