Comparison of Hysteresis Based PWM Schemes ΔΣ-PWM and Direct Torque Control

Klarmann, Kevin; Thielmann, Malte; Schumacher, Walter

doi:10.3390/app11052293

Cited by 2 publications

(3 citation statements)

References 26 publications

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“…In order to improve the performance of the conventional DFTC technique, the standard hysteresis comparators will be replaced by two TOSMC methods and the switching table by the SVM technique. The rotor flux and electromagnetic torque estimation block maintain the same shape as that established for classical DFTC, as described in [31,32]. In this DFTC control strategy, the rotor flux and torque are regulated by two proposed TOSMC regulators, while the SVM technique replaces the traditional switching table.…”

Section: Introductionmentioning

confidence: 99%

Improved Rotor Flux and Torque Control Based on the Third-Order Sliding Mode Scheme Applied to the Asynchronous Generator for the Single-Rotor Wind Turbine

Benbouhenni

Bizon

2021

Mathematics

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In this work, a third-order sliding mode controller-based direct flux and torque control (DFTC-TOSMC) for an asynchronous generator (AG) based single-rotor wind turbine (SRWT) is proposed. The traditional direct flux and torque control (DFTC) technology or direct torque control (DTC) with integral proportional (PI) regulator (DFTC-PI) has been widely used in asynchronous generators in recent years due to its higher efficiency compared with the traditional DFTC switching strategy. At the same time, one of its main disadvantages is the significant ripples of magnetic flux and torque that are produced by the classical PI regulator. In order to solve these drawbacks, this work was designed to improve the strategy by removing these regulators. The designed strategy was based on replacing the PI regulators with a TOSMC method that will have the same inputs as these regulators. The numerical simulation was carried out in MATLAB software, and the results obtained can evaluate the effectiveness of the designed strategy relative to the traditional strategy.

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Section: Introductionmentioning

confidence: 99%

Improved Rotor Flux and Torque Control Based on the Third-Order Sliding Mode Scheme Applied to the Asynchronous Generator for the Single-Rotor Wind Turbine

Benbouhenni

Bizon

2021

Mathematics

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“…This property allows the state trajectory x(t) to converge to a reference trajectory x ref (t) by an appropriate switching between these subsystems. In the first part of this paper, it was shown that the presented approach minimizes the quality functions h s (x(t),x ref (t)) for all s ∈ S by applying the switching law (10). Furthermore, it was shown that reaching the minimumĥ is equivalent to the convergence of the state trajectory x(t) to the reference trajectory x ref (t).…”

Section: Discussionmentioning

confidence: 94%

“…In addition, in [5], it was shown that a hysteresis current control is an effective way of achieving fast dynamic response. For this reason, the design and analysis of different hysteresis current controllers are the subject of many ongoing scientific works [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Hysteresis-Based Current Control Approach by Means of the Theory of Switched Systems

Thielmann

Hans

2021

Applied Sciences

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In this paper, a novel hysteresis-based current control approach is presented. The basis of the developed control approach is the theory of switched systems, in particular, the system class of switched systems with multiple equilibria. The proposed approach guarantees the convergence of the state trajectory into a region around a reference trajectory by selective switching between the individual subsystems. Here, the reference trajectory is allowed to be time varying, but lies within the state space spanned by the subsystem equilibria. Since already published approaches only show convergence to a common equilibrium of all subsystems, the extension to the mentioned state space is a significant novelty. Moreover, the approach is not limited to the number of state variables, nor to the number of subsystems. Thus, the applicability to a large number of systems is given. In the course of the paper, the theoretical basics of the approach are first explained by referring to a trivial example system. Then, it is shown how the theory can be applied to a practical application of a voltage source converter that is connected to a permanent-magnet synchronous motor. After deriving the limits of the presented control strategy, a simulation study confirms the applicability on the converter system. The paper closes with a detailed discussion about the given results.

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Comparison of Hysteresis Based PWM Schemes ΔΣ-PWM and Direct Torque Control

Cited by 2 publications

References 26 publications

Improved Rotor Flux and Torque Control Based on the Third-Order Sliding Mode Scheme Applied to the Asynchronous Generator for the Single-Rotor Wind Turbine

Improved Rotor Flux and Torque Control Based on the Third-Order Sliding Mode Scheme Applied to the Asynchronous Generator for the Single-Rotor Wind Turbine

Hysteresis-Based Current Control Approach by Means of the Theory of Switched Systems

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