An analytical approach to steady-state current control properties of power converters featuring discrete-time switching

2008 ◽  
Author(s):  
Ulrich Ammann ◽  
Rene Vargas ◽  
Stephan Rees ◽  
Jaume Serm ◽  
Jorg Roth-Stielow
Keyword(s):  
Steady State ◽  
Discrete Time ◽  
Analytical Approach ◽  
Power Converters ◽  
Current Control ◽  
Time Switching ◽  
Steady State Current ◽  
Approach To Steady State

scholarly journals An Approximate Analytical Approach to Steady State Simulation of Unglazed Solar Collectors

2014 ◽  
Vol 48 ◽  
pp. 28-36 ◽  
Author(s):  
Luigi P.M. Colombo ◽  
Cesare M. Joppolo ◽  
Luca Molinaroli ◽  
Elisa Rovelli
Keyword(s):  
Steady State ◽  
Analytical Approach ◽  
Solar Collectors ◽  
Steady State Simulation ◽  
Approach To Steady State

State Feedback Current Control of the Three-Phase Grid Connected Power Inverter for the Regenerative Loads

2013 ◽  
Vol 647 ◽  
pp. 935-938
Author(s):  
Marian Gaiceanu ◽  
Adriana Burlibasa ◽  
Cristian Eni ◽  
Mihaita Coman
Keyword(s):  
Steady State ◽  
Power Quality ◽  
State Feedback ◽  
Power Converters ◽  
Power Converter ◽  
Current Control ◽  
Current Loop ◽  
Three Phase ◽  
Simulation Results

Grid-connected power converters are controlled by the current loop, the voltage being delivered by the grid. The proposed state feedback current control has three components: the state feedback, the forcing component to achieve the desired state x1 and the compensating feed forward of the perturbation. Moreover, the control of the power converter, through the external DC-link voltage loop, and internal current loop, assures zero steady state error, and power quality performances. In order to prove the quality of the proposed control, a regenerative load has been used, and the corresponding simulation results are provided.

scholarly journals Discrete Terminal Super-Twisting Current Control of a Six-Phase Induction Motor

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1339
Author(s):  
Yassine Kali ◽  
Maarouf Saad ◽  
Jesus Doval-Gandoy ◽  
Jorge Rodas
Keyword(s):  
Steady State ◽  
Induction Motor ◽  
Discrete Time ◽  
Electrical Parameter ◽  
Estimation Method ◽  
Design Procedure ◽  
Time Delay Estimation ◽  
Current Control ◽  
Lyapunov Theory ◽  
Error Dynamics

In this manuscript, the high-accuracy stator currents tracking issue is considered for a six-phase induction motor subject to external perturbations and uncertainties due to unmeasurable rotor currents and electrical parameter variations. To achieve the control goals, the common two-cascade controllers structure is required for this type of motor. The first controller in the outer loop consists of a proportional integral to regulate the speed. Then, the second is the proposed inner nonlinear stator currents controller based on a robust discrete-time terminal super-twisting algorithm supported by the time-delay estimation method. For the design procedure, the discrete-time stator currents dynamics are derived; for example, the vector of the matched perturbations and unmeasurable rotor currents are specified to simplify the estimation. A detailed stability analysis of the closed-loop error dynamics using Lyapunov theory is given. Finally, a real asymmetrical six-phase induction motor is used to implement in real-time the developed method and to illustrate its effectiveness and robustness. The results obtained reveal a satisfactory stator currents tracking in steady state and transient conditions and under variation in the magnetizing inductance. Moreover, a comparative study with an existing method in steady state for two different rotor speeds is presented to show the superiority of the proposed discrete-time technique.

Characterization of Steady-State Current Ripple in Interleaved Power Converters Under Inductance Mismatches

2014 ◽  
Vol 29 (4) ◽  
pp. 1840-1849 ◽  
Author(s):  
Pablo D. Antoszczuk ◽  
Rogelio Garcia Retegui ◽  
Nicolas Wassinger ◽  
Sebastian Maestri ◽  
Marcos Funes ◽  
...  
Keyword(s):  
Steady State ◽  
Power Converters ◽  
Steady State Current ◽  
Current Ripple

Inductor Saturation Compensation in Three-Phase Three-Wire Voltage-Source Converters via Inverse System Dynamics-I

2020 ◽  
Author(s):  
Ziya Özkan ◽  
Ahmet Masum Hava
Keyword(s):  
Dynamic Model ◽  
Dynamic Performance ◽  
Current Control ◽  
Inverse System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Two Phase ◽  
Inverse Dynamic ◽  
Three Phase ◽  
Steady State Current

In three-phase three-wire (3P3W) voltage-source converter (VSC) systems, utilization of filter inductors with deep saturation characteristics is often advantageous due to the improved size, cost, and efficiency. However, with the use of conventional synchronous frame current control (CSCC) methods, the inductor saturation results in significant dynamic performance loss and poor steady-state current waveform quality. This paper proposes an inverse dynamic model based compensation (IDMBC) method to overcome these performance issues. Accordingly, a review of inductor saturation and core materials is performed, and the motivation on the use of saturable inductors is clarified. Then, two-phase exact modelling of the 3P3W VSC control system is obtained and the drawbacks of CSCC have been demonstrated analytically. Based on the exact modelling, the inverse system dynamic model of the nonlinear system is obtained and employed such that the nonlinear plant is converted to a fictitious linear inductor system for linear current regulators to perform satisfactorily.

Sign in / Sign up

Export Citation Format

Share Document