Dynamic model of one‐cycle control for converters operating in continuous and discontinuous conduction modes

Femia, N.; Fortunato, M.; Petrone, G.; Spagnuolo, G.; Vitelli, M.

doi:10.1002/cta.497

Cited by 22 publications

(17 citation statements)

References 19 publications

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“…In this way, a power stage analysis has been performed in order to propose switching and linear power stages suitable to address different modeling approaches, being possible to use it to emulate a wide range of fuel cells prototypes with detailed or simplified models. In this way, the emulator can be also improved by designing new switching power stages based on multiphase or interleaved DC/DC converters [49] and using more specialized controllers [50], in order to reduce the high-frequency voltage ripple with high efficiency and low-power source requirements.…”

Section: Discussionmentioning

confidence: 99%

Switching and linear power stages evaluation for PEM fuel cell emulation

Ramos‐Paja

Romero

Giral

et al. 2011

Circuit Theory & Apps

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A fuel cell-based power systems emulator designed to test devices and loads intended to interact with real prototypes is presented. The emulator uses a digital processing device and electrical power systems, evaluating the impact of using either switching or linear power stages in the emulator capabilities. A real fuel cell prototype is emulated using a parameterized physical fuel cell model, which is computed online by a digital device. Also, several power stages not previously used specifically for this application, with different efficiencies and performances, were developed and analysed. One of the power stages was based on a two-inductor step-down DC/DC converter for a switching power stage instead of the classical buck structure that is more prone to duty cycle saturation in transients at low output voltages. The other ones used high-power operational amplifiers for a linear power stage and linear regulators for a scalable linear power stage. Finally, the emulation system and the power stages were evaluated and validated using experimental data of a real fuel cell prototype. SWITCHING AND LINEAR POWER STAGES EVALUATION 477 power stages developed to interact with the electrical loads are described and analysed. In Section 4, the experimental results are reported. Finally, conclusions of the work are given in Section 5. FUEL CELL EMULATION TOPOLOGYThe fuel cell emulation system has three main parts. First, a mathematical model that describes the behaviour of the selected fuel cell is used to calculate the emulator output. Second, a digital system that executes a real-time algorithm, which processes the selected mathematical model, is used to control the emulator power stage. Third, the emulator power stage that interacts with the electrical loads. This power stage must follow the dynamics defined by the mathematical model, and this implies an appropriate control of this power system. Also, the power stage must be electrically efficient or have an effective thermal dissipation system in order to avoid damages in low voltage-high current operating points. Other characteristics like low-cost, simplicity, portability and scalability have been also taken into account in the design process.

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Section: Discussionmentioning

confidence: 99%

Switching and linear power stages evaluation for PEM fuel cell emulation

Ramos‐Paja

Romero

Giral

et al. 2011

Circuit Theory & Apps

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“…Note that, the PSIM simulations about the bode diagrams are obtained from the switch model of the NOESLLC, not its averaged model, so that it can be used to confirm the effectiveness of the derived transfer functions preliminary [16][17][18].…”

Section: Comparisonsmentioning

confidence: 99%

Improved DC Model and Transfer Functions for the Negative Output Elementary Super Lift Luo Converter

Wang¹

2017

Journal of Electrical Engineering and Technology

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-Negative output elementary super lift Luo converter (NOESLLC), which has the significant advantages including high-voltage transfer gain, high efficiency, high power density, and reduced output voltage/inductor current ripples when compared to the traditional DC-DC converters, is an attractive DC-DC converter for the field of negative DC voltage applications. In this study, in consideration of the voltage across the energy transferring capacitor changing abruptly at the beginning of each switching cycle, the improved averaged model of the NOESLLC operating in continuous conduction mode (CCM) is established. The improved DC model and transfer functions of the system are derived and analyzed. The current mode control is applied for this NOESLLC. The results from the theoretical calculations, the PSIM simulations and the circuit experiments show that the improved DC model and transfer functions here are more effective than the existed ones of the NOESLLC to describe its real dynamical behaviors.

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“…In other words, in [5], the assumption that the two energy-transferring capacitors are large enough to keep the voltage across themselves being constant at some values is only an extreme case, i.e., the assumption in [5] can not be satisfied in some cases in practical engineering. Also, from the characteristics of PSIM software [19][20], i.e., bode diagram of switching power converter can be directly obtained by using its switch mode form, bode diagram of the control-to-output transfer function (G vd (s)) of this novel step-up converter can be obtained, which is shown in Fig. 4.…”

Section: Circuit Operation Mathematical Model and Psim Simulationsmentioning

confidence: 99%

Control-to-output Transfer Function of the Open-loop Step-up Converter in CCM Operation

Wang¹,

Ma²

2014

Journal of Electrical Engineering and Technology

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-Based on the average method and the geometrical technique to calculate the average value, the average model of the open-loop step-up converter in CCM operation is established. The DC equilibrium point and corresponding small signal model is derived. The control-to-output transfer function is presented and analyzed. The theoretical analysis and PSIM simulations shows that the control-to-output transfer function includes not only the DC input voltage and the DC duty cycle, but also the two inductors, the two energy-transferring capacitors, the switching frequency and the load. Finally, the hardware circuit is designed, and the circuit experimental results are given to confirm the effectiveness of theoretical derivations and analysis.

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Dynamic model of one‐cycle control for converters operating in continuous and discontinuous conduction modes

Cited by 22 publications

References 19 publications

Switching and linear power stages evaluation for PEM fuel cell emulation

Switching and linear power stages evaluation for PEM fuel cell emulation

Improved DC Model and Transfer Functions for the Negative Output Elementary Super Lift Luo Converter

Control-to-output Transfer Function of the Open-loop Step-up Converter in CCM Operation

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