Fixed switching frequency sliding mode control using an hysteresis band controller

Repecho, Víctor; Biel, Domingo; Fossas, Enric

doi:10.1109/vss.2014.6881146

Cited by 9 publications

(8 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optimization procedure is performed with respect to a reference load condition. Indeed, in order to guarantee the constancy of the switching frequency also with respect to all the other operating conditions, a fixed switching frequency mode control still using a hysteresis band controller can be implemented [37]. A possible control architecture is shown in Figure 8, where the hysteresis band is changed in order to minimize the difference between T = T on + T o f f and the reference value of the period T * = 1/ f sw , being f sw the reference switching frequency.…”

Section: Control Strategymentioning

confidence: 99%

Design and Control of Coupled Inductor DC–DC Converters for MVDC Ship Power Systems

2019

View full text Add to dashboard Cite

This paper deals with the design and control aspects of modern ship power systems within the paradigm of an all-electric ship. The widespread use of power electronic converters is central in this context due to the technological advances in automation systems and the integration of the electrical propulsion systems and other components, such as electrical energy storage systems and renewable energy sources. The issue to address in this scenario is related to the request of increased performances in dynamic operation while pursuing advantages in terms of energy savings and overall system security. In addition, the presence of large load changes requires providing robustness of the control in terms of system stability. This paper is focused on medium voltage direct current (MVDC) ship power systems and the design and control of coupled inductor DC–DC converters. The load is handled in terms of a constant power model, which generally is considered the most critical case for testing the stability of the system. The robustness of the design procedure, which is verified numerically against large and rapid load variations, allowed us to confirm the feasibility and the attractiveness of the design and the control proposal.

show abstract

Section: Control Strategymentioning

confidence: 99%

Design and Control of Coupled Inductor DC–DC Converters for MVDC Ship Power Systems

2019

View full text Add to dashboard Cite

show abstract

“…The SMC implementation with fixed hysteresis band comparators instead of sign functions yields an inherently variable switching frequency. In order to regulate the switching frequency, this work follows the control scheme proposed in [28]. The technique adds a new loop which measures the switching period, in this application the Master phase, updates the hysteresis band value using a switching frequency controller (SFC), and enforces the measured switching period t s to converge to a reference one t * s .…”

Section: Switching Frequency Regulationmentioning

confidence: 99%

“…Moreover, a power management algorithm deals with connect or disconnect phases depending on the delivered power to the load is included to improve the efficiency of the converter. Besides, in order to regulate the switching frequency of the phases, a switching frequency controller is designed following the procedure proposed in [28]. Such methodology does not require any synchronization clock signal and it is only applied to one of the converter phases.…”

Section: Introductionmentioning

confidence: 99%

Fixed-Switching Frequency Interleaved Sliding Mode Eight-Phase Synchronous Buck Converter

Repecho

Biel

Ramos-Lara

et al. 2018

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

This paper describes the design of an interleaved sliding mode control for a multiphase synchronous buck converter, which inherits the properties of the sliding mode control, operates with fixed switching frequency at steady-state and ensures current equalization among the phases. Moreover, a power management algorithm is added in order to decide the number of active phases as function of the power load demand, thus optimizing the converter efficiency. The systems uses a Master-Slave structure where each phase can actuate as the Master one in such a way that the overall system reliability is improved. Experimental results in a 1.5 kW 8-phase synchronous buck converter show that interleaving operation, robust output voltage regulation, phase current equalization, switching frequency regulation and power management are achieved.

show abstract

“…Theorem 1: [1] Let Assumption A be fulfilled, with x * being a constant regulation point, and let the hysteresis band amplitude, ∆, be updated according to (20). If the integral gain γ is selected as…”

Section: A the Regulation Casementioning

confidence: 99%

“…Proof: It follows applying Jury stability criterion to the characteristic polynomial associated to the difference equation (17), see [1] for details.…”

Section: A the Regulation Casementioning

confidence: 99%

Switching Frequency Regulation in Sliding Mode Control by a Hysteresis Band Controller

Repecho

Biel

Olm

et al. 2017

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

Abstract-Fixing the switching frequency is a key issue in sliding mode control implementations. This paper presents a hysteresis band controller capable of setting a constant value for the steady state switching frequency of a sliding mode controller in regulation and tracking tasks. The proposed architecture relies on a piecewise linear modeling of the switching function behavior within the hysteresis band, and consists of a discrete-time integraltype controller that modifies the amplitude of the hysteresis band of the comparator in accordance with the error between the desired and the actually measured switching period. For tracking purposes an additional feedforward action is introduced to compensate the time variation of the switching function derivatives at either sides of the switching hyperplane in the steady state. Stability proofs are provided, and a design criterion for the control parameters to guarantee closed-loop stability is subsequently derived. Numerical simulations and experimental results validate the proposal.

show abstract

Fixed switching frequency sliding mode control using an hysteresis band controller

Cited by 9 publications

References 14 publications

Design and Control of Coupled Inductor DC–DC Converters for MVDC Ship Power Systems

Design and Control of Coupled Inductor DC–DC Converters for MVDC Ship Power Systems

Fixed-Switching Frequency Interleaved Sliding Mode Eight-Phase Synchronous Buck Converter

Switching Frequency Regulation in Sliding Mode Control by a Hysteresis Band Controller

Contact Info

Product

Resources

About