Simultaneous PWM control to operate the three-phase dual active bridge converter under soft switching in the whole load range

Huang, Jun; Wang, Yue; Li, Zhuoqiang; Jiang, Yongbin; Lei, Wanjun

doi:10.1109/apec.2015.7104760

Cited by 40 publications

(6 citation statements)

References 13 publications

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“…DAB control in a three-phase system has also been studied. Reference [11] proposes a novel simultaneous PWM control strategy for a three-phase DAB to realize ZVS in the whole load range.…”

Section: Introductionmentioning

confidence: 99%

Zero Voltage Switching for High Power Three-Phase Inductive Power Transfer With a Dual Active Bridge

Cui,

Pehrman,

Liu

et al. 2024

IEEE Access

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Inductive power transfer (IPT) technology used for charging electric vehicles faces challenges in transferring high power because the power capacity and switching losses of high-frequency semiconductor devices are limiting factors. A three-phase system is a common high-power solution and soft switching is crucial for efficiency-oriented applications with high switching frequencies. In addition, dual active bridge (DAB) topology is a suitable topology for soft switching and has advantages in controllability and high efficiency. Therefore, to obtain higher power and efficiency, this paper studies the zero voltage switching (ZVS) of a three-phase inductive power transfer system with a dual active bridge. The three-phase IPT system with a DAB is different from both the normal three-phase DAB converter and the single-phase IPT system with a DAB, so their ZVS conditions and ranges are also different and need to be studied. This paper investigates the conditions and operating range for realizing zero voltage switching of the three-phase IPT system with a DAB. Based on this, the efficiency of the system is improved by changing the load angle between the primary and secondary sides. Finally, a 60 kW three-phase IPT system with a DAB is built, and the experimental verification of the study is conducted.INDEX TERMS Dual Active Bridge (DAB), Inductive Power Transfer (IPT), Zero Voltage Switching (ZVS).

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“…DAB control in a three-phase system has also been studied. Reference [11] proposes a novel simultaneous PWM control strategy for a three-phase DAB to realize ZVS in the whole load range.…”

Section: Introductionmentioning

confidence: 99%

Zero Voltage Switching for High Power Three-Phase Inductive Power Transfer With a Dual Active Bridge

Cui,

Pehrman,

Liu

et al. 2024

IEEE Access

View full text Add to dashboard Cite

show abstract

“…Literature [4] proposes that the change of switches duty cycle can achieve higher performance, but only when the duty cycle is 1/3 is analysed. Literature [5,6] proposes simultaneous PWM control with the same duty cycle. Literature [7] proposed a duty cycle control method based on multiple harmonic approximation analysis, which can solve the three-degree-of-freedom global current RMS optimal solution, but it must be solved by offline calculation.…”

Section: Introductionmentioning

confidence: 99%

“…It can only be realized by the look-up table method in the digital controller of the converter, which is not convenient. Literature [6] proposes a current stress optimal method in the full power range, but the effect of the current RMS is not considered.…”

Section: Introductionmentioning

confidence: 99%

Current optimal control method for three-phase dual active bridge converter in light load conditions

Wang

Dai

2021

E3S Web Conf.

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Three-phase dual active bridge converter has many performance advantages, and is widely used in electric vehicle charging, battery energy storage system, power electronic transformer, and other energy conversion occasions. However, in the traditional control method, it has the problem of low efficiency under light load conditions. In this paper, firstly, the power and current expressions of the converter under light load conditions are solved by time-domain analysis, and an optimal current control method under light load conditions is proposed. This control method can simultaneously realize the minimum inductance current stress and RMS. Finally, the effectiveness of this method is verified by experiments.

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“…Similar to [19] regarding the HB-DAB, [50], [51] propose a modulations where transformer asymmetrical voltage waveforms are generated, hence gaining two DoF with respect to the conventional PSM, which permit increasing the ZVS region [50] and decrease the transformer rms currents [51]. However, such modulation causes an increase of the dc-link capacitors rms current and an unequal power-loss distribution among the switches.…”

Section: Active-bridge Dc-dc Convertersmentioning

confidence: 96%

Contributions to the modulation and closed-loop control of multilevel dual-active-bridge Dc-Dc converters

Filbà Martínez

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Galvanically-isolated bidirectional dc-dc converters (IBDCs) have recently received more attention due to its increasing use in systems requiring energy transfer between two dc networks in both directions, requiring galvanic isolation and a high voltage gain. Some of these systems are energy storage systems, vehicle-to-grid power interfaces, fuel cell energy systems, uninterruptable power supplies, high-voltage dc links for electric-energy transmission, and solid-state transformers.The most prominent IBDC, thanks to its good performance, is the dual-active-bridge (DAB) converter. It features a high power density, a wide dc-voltage gain working range, a low count of passive components, and an exceptional transformer utilization. Nevertheless, the DAB converter suffers from a significant performance deterioration when operating at conditions different from its nominal design working point. This problem has been alleviated by designing complex modulation schemes, which require a high computational effort and are highly dependent on the parasitic-component values. On the other hand, as DAB converters have been lately introduced in high-power applications, higher voltages are needed in the dc links in order to achieve reasonable efficiency values. This has led to the use of multilevel topologies on the DAB converters, mainly multilevel neutral-point-clamped (NPC) topologies. However, the little and recent literature in this topic have not fully explored the operational capabilities and performance benefits of multilevel DAB converters.The aim of this thesis is to study the viability of multilevel NPC DAB (ML-DAB) converters, where the major faced challenge is the dc-link capacitors voltage balancing. First, three particular ML-DAB converters are studied, with the same number of levels on each side; the three-level, four-level, and five-level topologies (3L-DAB, 4L-DAB, and 5L-DAB, respectively). Suitable switching sequences, modulation schemes, and control schemes are designed for the proposed ML-DAB converters. The converter switching and conduction losses are studied with three figures of merit, resulting in a set of practical solutions that define the modulation parameters and achieve satisfactory converter-performance figures. These results are then generalized to the N-level topology (NL-DAB). Finally, the feasibility of ML-DAB converters with an asymmetric number of levels is also demonstrated. Els convertidors de cc-cc bidireccionals amb aïllament galvànic (IBDCs) han rebut recentment força atenció, degut al seu ús creixent en sistemes on es requereix la transferència d'energia elèctrica entre dues xarxes de cc en ambdues direccions, a més d'aïllament galvànic i un alt guany de tensió. Alguns exemples són sistemes d'emmagatzematge d'energia elèctrica, interfícies de potència per sistemes 'Vehicle-to-Grid', sistemes de piles de combustible, sistemes d'alimentació ininterrompuda, xarxes elèctriques de cc i alta tensió i transformadors d'estat sòlid. El membre més important dins dels IBDCs, gràcies al seu bon rendiment, és el convertidor dual active bridge (DAB). Aquest presenta una alta densitat de potència, un ampli rang de guany de tensió, un nombre baix de components passius i una utilització excepcional del transformador. No obstant això, pateix d'un deteriorament significatiu del seu rendiment quan opera fora del seu punt de treball nominal. A la literatura, aquest problema s'ha alleujat proposant esquemes de modulació alternatius, que solen ser complexos, requereixen un alt esforç computacional i són altament dependents dels valors dels components paràsits del convertidor. Recentment, els convertidors DAB han estat introduïts en aplicacions d'alta potència, que requereixen tensions de bus de cc elevades, per tal d'assolir valors d'eficiència raonables. Això ha conduït a l'ús de topologies multinivell en els convertidors DAB, principalment topologies d'enclavament al punt neutre (NPC). No obstant això, la literatura recent en aquest tema és escasa i no explora completament les capacitats operatives i els potencials beneficis que els convertidors DAB multinivell poden oferir.L'objectiu d'aquesta tesi és estudiar la viabilitat dels convertidors DAB multinivell emprant toplogies NPC (ML-DAB), on el principal desafiament és la necessitat de garantir l'equilibri de les tensions als condensadors del bus de cc. En primer lloc, s'estudien tres casos particulars dels convertidors ML-DAB, on cadascun presenta el mateix nombre de nivells en cada costat. Aquests casos són les topologies de tres nivells, quatre nivells i cinc nivells (3L-DAB, 4L-DAB i 5L-DAB, respectivament). Es dissenyen seqüències de commutació, esquemes de modulació, i esquemes de control adequats per als convertidors ML-DAB proposats. Les pèrdues de conducció i commutació dels convertidors ML-DAB proposats s'estudien a partir de tres figures de mèrit. Els resultats d'aquest estudi ajuden a determinar un conjunt de solucions pràctiques per a definir els paràmetres de modulació, obtenint, a la vegada, rendiments satisfactoris. L'estudi realitzat en els tres casos particulars es generalitza al cas de la topologia d'N nivells (NL-DAB). Finalment, la viabilitat dels convertidors ML-DAB amb un nombre asimètrica de nivells també es demostra.

show abstract

Simultaneous PWM control to operate the three-phase dual active bridge converter under soft switching in the whole load range

Cited by 40 publications

References 13 publications

Zero Voltage Switching for High Power Three-Phase Inductive Power Transfer With a Dual Active Bridge

Zero Voltage Switching for High Power Three-Phase Inductive Power Transfer With a Dual Active Bridge

Current optimal control method for three-phase dual active bridge converter in light load conditions

Contributions to the modulation and closed-loop control of multilevel dual-active-bridge Dc-Dc converters

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