Robust nonlinear adaptive control of multiphase synchronous buck power converters

Fadil, H. El; Giri, F.

doi:10.1016/j.conengprac.2009.04.009

Cited by 28 publications

(14 citation statements)

References 16 publications

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“…The k th buck power converter ( k = 1,…,N) includes a switch S k , a freewheel diode D k , a smoothing inductance L k (with its equivalent series resistance (ESR) r k ), and a filtering capacitor C k . Each converter is controlled using a pulse width modulation. The nonisolated topology of DC‐DC converters is used as a concern is the efficiency and the size of the converter.…”

Section: System Overview and Modelingmentioning

confidence: 99%

See 1 more Smart Citation

Output feedback control of supercapacitors parallel charging system for EV applications: Theoretical design and experimental validation

Belhaj

Fadil

Rachid

et al. 2019

Adaptive Control & Signal

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In this paper, the problem of controlling parallel charging system with supercapacitors for electric vehicle applications is considered. When the vehicle parks at the station, the charging process of supercapacitors needs to be completed in less than 30 seconds. The control objective is then to tightly regulate the supercapacitors state of charge (SOC) to a given reference constant and to ensure an adequate current sharing between different parallel chargers. Indeed, the current sharing is a critical issue for parallel charging system with supercapacitors, which is a nonlinear system with control inputs constraints.Besides, the SOC depends on the supercapacitors internal voltage, which is not accessible for measurement. Therefore, based on a large-signal model of the parallel-chargers-supercapacitors system, an output feedback controller (combining a state observer and a nonlinear control laws) is designed. The controller is formally shown to meet all objectives, namely, closed-loop stability, SOC reference tracking, and equal current sharing. The effectiveness of the proposed output feedback controller approach is verified both by simulation and by experimental tests. KEYWORDSLyapunov stability, nonlinear control, nonlinear observer, parallel chargers, supercapacitors INTRODUCTIONDesigning onboard energy storage systems for electrical vehicles has been an intensive research activity over the last two decades. First, only batteries have been used in the storage system, before supercapacitors where introduced. Recent solutions involved both batteries and supercapacitor in the storage systems. 1,2 Presently batteries are used as energy storage devices in most applications. Such hybridization topologies can result into enhancing the battery performances by increasing its life cycle, rated capacity, reducing the energy losses, and limiting the temperature rising inside the battery. Comparing the charger circuits of batteries and supercapacitors, there are similarities and differences. Concerning similarities, the constant current/constant voltage charging method is generally preferred in both circuits for safety of the storage system. One advantage with batteries is that the range of voltage between discharged and fully charged is not very wide, so it does not pose any issue for charger circuit, while with supercapacitors, it may be needed to reach the fully discharged state, which entails a zero voltage. On the other hand, the use of battery pack necessitates the monitoring and management of the state of charge (SOC) of each individual cell of the battery. This is not an issue with supercapacitors 1374

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Section: System Overview and Modelingmentioning

confidence: 99%

“…"> b.Chargers modeling Figure shows an equivalent circuit of the k th ( k = 1, …, N ) charger where the supercapacitor group is represented by its model of Figure . The current source

((), i_{T} - i_{Lk} = \sum_{i = 1 ((), i \neq k)}^{N} i_{oi})

represents the sum of all supplied currents from the other chargers …”

Section: System Overview and Modelingmentioning

confidence: 99%

Output feedback control of supercapacitors parallel charging system for EV applications: Theoretical design and experimental validation

Belhaj

Fadil

Rachid

et al. 2019

Adaptive Control & Signal

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“…For this reason, in many applications, FC generators must be interfaced with other energy/ power sources by means of an electronic power converter [4][5][6]. Among the various topologies of DC-DC converters, the interleaved converter has been proposed as a suitable interface for FCs to convert low-voltage high-current input into a high-voltage low-current output [7][8][9][10][11][12][13][14][15]. The advantages of the interleaved boost converter (IBC) compared to the classical boost converter are low input current ripple, high efficiency, faster transient response, reduced electromagnetic emission, and improved reliability.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Output Feedback Control of Interleaved Parallel Boost Converters Associated with Fuel Cell

Salhi

Fadil

Ahmed‐Ali

et al. 2015

Electric Power Components and Systems

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“…However, the controller of [14] is designed only for a continuous mode of operation; hence, the stability of the proposed method cannot be guaranteed in a discontinuous operation and during transition between different modes. In addition, in [15], an adaptive robust controller is reported for DC-DC buck converter. However, a controller design is formulated for a continuous conduction mode, and the response of the system is evaluated only by a computer-based simulations.…”

Section: Introductionmentioning

confidence: 99%

“…However, a controller design is formulated for a continuous conduction mode, and the response of the system is evaluated only by a computer-based simulations. Moreover, in non-minimum phase DC-DC converters, directly using the controller of [15] is impossible.…”

Section: Introductionmentioning

confidence: 99%

Lyapunov Based Adaptive-Robust Control of the Non-Minimum phase DC-DC Converters Using Input-Output Linearization

Salimi¹,

Zakipour²

2015

Journal of Power Electronics

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In this research, a combined adaptive-robust current controller is developed for non-minimum-phase DC-DC converters in a wide range of operations. In the proposed nonlinear controller, load resistance, input voltage and zero interval of the inductor current are estimated using developed adaptation rules and knowing the operating mode of the converter for the closed-loop control is not required; hence, a single controller can be employed for a wide load and line changes in discontinuous and continuous conduction operations. Using the TMS320F2810 digital signal processor, the experimental response of the proposed controller is presented in different operating points of the buck/boost converter. During transition between different modes of the converter, the developed controller has a better dynamic response compared with previously reported adaptive nonlinear approach. Moreover, output voltage steady-state error is zero in different conditions.

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Robust nonlinear adaptive control of multiphase synchronous buck power converters

Cited by 28 publications

References 16 publications

Output feedback control of supercapacitors parallel charging system for EV applications: Theoretical design and experimental validation

Output feedback control of supercapacitors parallel charging system for EV applications: Theoretical design and experimental validation

Adaptive Output Feedback Control of Interleaved Parallel Boost Converters Associated with Fuel Cell

Lyapunov Based Adaptive-Robust Control of the Non-Minimum phase DC-DC Converters Using Input-Output Linearization

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