Study of a Dual-Loop Subordinate Control System for a DC-DC Converter with Galvanic Isolation

Klassen, Sergey V.; Klassen, Tatiana S.; Shtein, Dmitry А.; Volkov, Alexander G.; Dubkova, Regina Yu.; Luft, Sergey V.

doi:10.1109/edm.2018.8435034

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…Conventional isolated converters include fly back converters, forward converters, and push-pull converters. Isolated converters are more widely used because they better ensure safety [7][8][9], provide galvanic isolation, and improve noise immunity. The conventional boost converter has a simple structure and is low in cost.…”

Section: Introductionmentioning

confidence: 99%

Design of a High Efficiency High Step-Up/Step-Down Bidirectional Isolated DC–DC Converter

Lin

2021

Processes

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This paper presents a novel bidirectional DC–DC converter, equipped with a three-winding coupled inductor, that can be applied to high-voltage, bidirectional DC–DC energy conversion and meet battery charging and discharging requirements. The architecture consists of a semi-Z-source converter and a forward–flyback converter featuring a three-winding coupled inductor with an iron core. This proposed topology retains the current continuity characteristics of the low-voltage side, all switches possess the zero-voltage switching feature, and the switches on the low-voltage side in the step-down mode have a synchronous rectification function. A 500-W bidirectional converter is implemented to examine the practicality and feasibility of the proposed topology. The relatively streamlined design of the converter can greatly reduce production costs. In the step-up and step-down modes, the maximum energy conversion efficiencies are 95.74% and 96.13%, respectively.

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Section: Introductionmentioning

confidence: 99%

Design of a High Efficiency High Step-Up/Step-Down Bidirectional Isolated DC–DC Converter

Lin

2021

Processes

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“…Forward converters, which are popular switched-mode power supplies (SMPSs), have a simple circuit configuration, as they employ a single power transistor referenced to the primary-side return. Forward converter topologies (especially single-ended), typically used in off-line applications in the 100 W−300 W region, are extensively used in applications such as telecom central office equipment, smartphones, systems that use distributed power Regarding the literature review, in [2], a dual-loop control strategy, where an analog PI controller was used for the synthesis of both the internal current control loop and the external voltage control loop, was proposed for a galvanically isolated forward converter to ensure better transient response and reduced ripples in the output voltage. For both the loops, the PI controller was designed based on crossover frequency and phase margin characteristics.…”

Section: Introductionmentioning

confidence: 99%

Multivariable Unconstrained Pattern Search Method for Optimizing Digital PID Controllers Applied to Isolated Forward Converter

et al. 2020

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Most of the traditional PID tuning methods are heuristic in nature. The heuristic approach-based tuned PID controllers show only nominal performance. In addition, in the case of a digital redesign approach, mapping of the heuristically-designed continuous-time PID controllers into discrete-time PID controllers and in case of the direct digital design approach, mapping of the continuous-time plant (forward converter) into the discrete-time plant, results in frequency distortion (or warping). Besides this, nonlinear elements such as ADC and DAC, and delay in the digital control loop deteriorate the control performance. There is a need to tune conventionally-designed digital controllers to enhance performance. This paper proposes optimized discrete-time PID controllers for a forward DC–DC converter operating in continuous conduction mode (CCM). The considered conventional digital PID controllers designed on the basis of the digital redesign and direct digital approaches are tuned by one of the multivariable unconstrained pattern search methods named Hooke–Jeeves (H–J) search method to ensure excellent output voltage regulation performance against the changes in input voltage and load current. Numerical results show that the H–J-based optimized PID compensated forward converter system shows tremendous improvement in performance compared to its unoptimized counterpart and simulated annealing (SA)-based compensated system, thus justifying the applicability of the H–J method for enhancing the performance.

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Computer Visualization of Optimality Criterion’s Weighting Coefficients of Electromechanical System

Kurochkin

Kochetkov

et al. 2020

Advances in Intelligent Systems and Computing

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Study of a Dual-Loop Subordinate Control System for a DC-DC Converter with Galvanic Isolation

Cited by 5 publications

References 2 publications

Design of a High Efficiency High Step-Up/Step-Down Bidirectional Isolated DC–DC Converter

Design of a High Efficiency High Step-Up/Step-Down Bidirectional Isolated DC–DC Converter

Multivariable Unconstrained Pattern Search Method for Optimizing Digital PID Controllers Applied to Isolated Forward Converter

Computer Visualization of Optimality Criterion’s Weighting Coefficients of Electromechanical System

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