Adaptive Position Tracking with Hard Constraints—Barrier Lyapunov Functions Approach

Kabziński, Jacek; Mosiołek, Przemysław; Jastrzębski, M.

doi:10.1007/978-3-319-45735-2_2

Cited by 12 publications

(10 citation statements)

References 7 publications

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“…Power electronic converters are complex nonlinear time‐variant systems that rely on solid‐state devices operating as switches. Advanced control techniques like adaptive control, multivariable control, and predictive control can be used for the design of closed‐loop systems in this case 1 . On the other hand, the most common approach for controlling variables of interest often consists of linearizing the converter around a fixed operating point so that it behaves as a linear time‐invariant system 2 .…”

Section: Introductionmentioning

confidence: 99%

Unified small‐signal model for DC‐DC converters based on the three‐state switching cell operating in discontinuous conduction mode

Tofoli

2023

Circuit Theory & Apps

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SummaryUnified small‐signal modeling approaches are of paramount importance for the design of controllers and closed‐loop control systems in power electronic converters. In this sense, this work proposes the small‐signal analysis of non‐isolated dc‐dc converters employing the three‐state switching cell (3SSC) in discontinuous conduction mode (DCM). The modeling technique relies on the very same principles of the pulse width modulation (PWM) switch while not involving matrix operations, but only basic concepts related to electric circuits. Considering that the waveforms associated with the terminals of the 3SSC in DCM have a common behavior in all basic dc‐dc converters, it is possible to derive the small‐signal models for both operating regions of the 3SSC, that is, non‐overlapping mode (NOM) and overlapping mode (OM). Thus, one can effectively demonstrate that the same circuit can represent both modes, even though the coefficients that describe the models are calculated from distinct equations. The theoretical claims are validated in the frequency and time domains while comparing the model with the converter. The obtained results evidence that the unified model can accurately represent converters based on the 3SSC in DCM.

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Section: Introductionmentioning

confidence: 99%

Unified small‐signal model for DC‐DC converters based on the three‐state switching cell operating in discontinuous conduction mode

Tofoli

2023

Circuit Theory & Apps

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“…As a result, manufacturers must bring forward cutting-edge powertrain technologies to provide customers with compact, energy efficient, long-range, environmentally friendly cars at limited costs. This challenge requires a lot of research and development to design better technological solutions to fulfill the needs in low carbon emission transports necessary for slowing down global warming and improving cities air quality [3], [4]. This paper will focus on the electric motor for an electric vehicle powertrain.…”

Section: Introductionmentioning

confidence: 99%

“…Power modules represent 34% of power converters failures and power converters contribute to 80% of total electric drives failures [1], [3]. Moreover, the power devices gathered with their gate drivers and control circuits represent 50% of the industrial power converters which shows the importance of those failures [7], [8].…”

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confidence: 99%

Open-circuit fault detection of inverter fed PMSM for electrical powertrain applications

Haidar

Douiri

Bartoli

2023

IJPEDS

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This paper aims to enhance the reliability of power electronic converters fed permanent magnet synchronous machine for electrical powertrain applications. Many faults like open circuit may affect the power converter and quickly lead to a decline in supplied power quality and all the power train components behavior. In this framework, this paper proposes an open circuit fault detection scheme for inverters. First, the dynamic models of the powertrain subsystems were developed. In fact, all the mathematics models of the motor, inverter, power converter, battery and charger are presented. Then, a detection scheme of open-circuit fault in inverter/motor. The control schemes were elaborated based on current analysis method. The diagnosis strategy under discontinuous switch-ing dynamics of the DC/AC inverter is proposed.

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“…Another task of the control system is to prevent mechanical oscillations in transient states, which can lead to the deterioration of the operating condition of the drive system. Therefore, the identification of the state of the mechanical system in electric drives is becoming an increasingly important problem [31,32].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Electromechanical Systems Containing Long Elastic Couplings and Safety of Their Operation

2021

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The electromechanical systems under analysis include electric drives, working machines that perform specific tasks in the technological process, and working mechanisms that transmit mechanical power between the electric drive and the working machine. The vast majority of electric motors included in drive systems require rotational speed control. This task is most often performed with the use of closed-loop control structures based on speed controllers. A step or overly rapid change in the speed reference causes a temporary lock of the speed controller due to the applied limitations at its output. Particularly, unfavorable effects of such a lock can be observed in drive systems in which there is a long elastic coupling (transmission shaft) between the electric motor and the working machine. As a consequence, shaft torsion and accompanying twisting moments of considerable amplitudes appear. This article proposes an uncomplicated active torque limiter structure, which enables the uninterrupted operation of the speed controller thanks to the automatic adaptation of the rate of the speed reference change to any moment of inertia of the rotor and attached rotating masses. The results of the investigations confirm the effectiveness of the proposed structure.

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Adaptive Position Tracking with Hard Constraints—Barrier Lyapunov Functions Approach

Cited by 12 publications

References 7 publications

Unified small‐signal model for DC‐DC converters based on the three‐state switching cell operating in discontinuous conduction mode

Unified small‐signal model for DC‐DC converters based on the three‐state switching cell operating in discontinuous conduction mode

Open-circuit fault detection of inverter fed PMSM for electrical powertrain applications

Dynamics of Electromechanical Systems Containing Long Elastic Couplings and Safety of Their Operation

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