Output Voltage Ripple Analysis and Design Considerations of Intrinsic Safety Flyback Converter Based on Energy Transmission Modes

Hu, Wei; Zhang, Fangying; Xu, Yiming; Chen, Xinbing

doi:10.6113/jpe.2014.14.5.908

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…The variation of the current through the barrier and the variation of the voltage at the exit of the barrier are studied when a step signal is applied at the end of the equipment. The integral-differential equation of the voltages when the circuit is closed is [14]:…”

Section: Figure 5 Electrical Diagram Of the Safety Barrier When Applying The Signal Stepmentioning

confidence: 99%

Safety barrier of electrical equipment for environments with a potential explosion in underground coal mines

Niculescu¹,

Marcu²,

Arad³

et al. 2020

Min. miner. depos.

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Purpose. Electrical equipment for explosion-threatening environments in mines at risk of explosion communicates with the external environment through intrinsic safety barriers that limit the values of currents to values below the methane ignition, limit that exceeds the allowable concentration in the atmosphere. This avoids work accidents due to under-ground explosions, avoiding the risk of explosion through electric equipment. Methods. Experimental research has been based on the geomechanical characterization of the coal and surrounding rocks in the Jiu Valley Basin and measurements obtained in situ was researched by statistic methods. Three methods of studying barriers based on the use of the MATLAB program were used. The first method is based on MATLAB programming, the second involves the barrier study using the Simulink model and the third method is based on the use of the SimPowerSystems software package. In all three cases studied, the variation of the voltage at the output of the barrier and current through the barrier are analyzed considering two operating modes, the aperiodic and the oscillating regimes. Findings. The paper is a study of the intrinsic security barriers, based on which a correct dimensioning can be made. Originality. The originality of the paper consists in the analysis of the barriers with intrinsic safety, using the simulation with the MATLAB-Simulink program packages. Practical implications. All the methods addressed lead to obtaining the diagrams of variation of the voltage at the exit of the barrier and of the current through the barrier in two possible regimes: the aperiodic regime and the oscillating regime.

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Section: Figure 5 Electrical Diagram Of the Safety Barrier When Applying The Signal Stepmentioning

confidence: 99%

Safety barrier of electrical equipment for environments with a potential explosion in underground coal mines

Niculescu¹,

Marcu²,

Arad³

et al. 2020

Min. miner. depos.

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“…In addition, a small inductance meets demand for a small volume, and improves safety in some special scenarios [9,10]. The inductance parameters of the converter design have been discussed in several papers.…”

Section: Introductionmentioning

confidence: 99%

Boost converter design for ferrite core compatible with strong magnetic fields

Bai

Zhou

2021

J. Power Electron.

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Boost converters with a ferrite core are widely used in neurostimulators. However, there may be some problems if it is used in a strong magnetic field because the saturation of the ferrite core leads to a serious decline in the inductance value. To evaluate whether a converter can work normally in a strong magnetic field, it is critical to obtain the lower limit value of the inductance of the converter. Besides, small inductance is easy to fit the small volume of a converter and is also safe in some special scenarios. Therefore, this paper is mainly devoted to establishing the minimum inductance design criterion of boost converters with a pulse load. The operational modes and equivalent circuit considering the parasitic resistance of boost converter components are presented. Then the mathematical formula for the minimal inductance value is derived through theoretical analysis of the components' current and output voltage. A digital simulation model of a boost converter is established to verify the theoretical analysis. Sets of comparison curves between the theoretical analysis and the simulation show that their results are in good agreement verifying the feasibility of the proposed method. The results in this paper provide theoretical support for the compatibility of converters containing a ferrite core inductor in a strong magnetic field and for the design requirement of a converter with a little volume inductor.

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“…Among these converters, the flyback converter is most popularly used because of its simple power circuit structure [9], [10]. However, the conventional flyback converter is limited by high switch voltage stress [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Actively Clamped Two-Switch Flyback Converter with High Efficiency

Yang¹,

Choi²

2015

Journal of Power Electronics

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This paper proposes an actively clamped two-switch flyback converter. Compared to the conventional two-switch flyback converter, the proposed two-switch flyback converter operates with a wide duty cycle range. By using an active-clamp circuit, the proposed converter achieves zero-voltage switching for all of the power switches. Zero-current switching of an output diode is also achieved. Thus, compared with the conventional converter, the proposed converter realizes a higher efficiency with an extended duty cycle. The performance of the proposed converter is verified by the experimental results with use of a 1.0 kW prototype circuit.

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Output Voltage Ripple Analysis and Design Considerations of Intrinsic Safety Flyback Converter Based on Energy Transmission Modes

Cited by 7 publications

References 15 publications

Safety barrier of electrical equipment for environments with a potential explosion in underground coal mines

Safety barrier of electrical equipment for environments with a potential explosion in underground coal mines

Boost converter design for ferrite core compatible with strong magnetic fields

Actively Clamped Two-Switch Flyback Converter with High Efficiency

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