Enhanced Modulation Strategy for a Three-Phase Dual Active Bridge—Boosting Efficiency of an Electric Vehicle Converter

Hoek, Hauke van; Neubert, Markus; Doncker, Rik W. De

doi:10.1109/tpel.2013.2251905

Cited by 148 publications

(50 citation statements)

References 11 publications

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“…Consequently, auxiliary circuits [32] and multilevel topologies have been investigated to improve the soft-switching range and the efficiency [33]. Furthermore, the so-called parallel-phase operation [22], [34], [35] and the duty-cycle operation [36] have been developed. Those operation strategies allow to utilize the dual phase-shift operation strategies known from the single-phase dual-active bridge by either changing the phase shift between the switches of each port or by utilizing an asymmetric duty cycle.…”

Section: A Modulation Strategiesmentioning

confidence: 99%

Key Components of Modular Propulsion Systems for Next Generation Electric Vehicles

et al. 2017

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Abstract-The objective of this paper is to provide an overview of emerging technologies for modular power converter architectures for electric vehicles. Nowadays, the most common electrical drive-train architecture exhibits one single inverter which is directly tied to the battery. As a consequence, only one high-voltage battery module can be applied and the dc-link voltage of the inverter and its apparent power rating is directly dependent on the available battery voltage. To overcome this restriction, modern power converter architectures with a higher degree of freedom have been proposed. These architectures exhibit modular dc-dc converters to allow different battery technologies to be linked to drive inverters operating independently from each other. To make this development feasible, new components and technologies are evolving which enhance the efficiency over mission cycles while ensuring further integration of the power-converter architectures.Wide-bandgap power semiconductors enable high switching frequencies and miniaturization of passive devices. Smart topology enhancements and control methods allow a significant loss reduction, in particular at light loads, resulting in a higher efficiency of the drive train over the entire driving cycle. Highly integrated bidirectional battery charger systems with intelligent charging strategies inhibit battery degradation and provide opportunities for grid stabilization. It is demonstrated how these technologies are realized and implemented to contribute to the development of future electric vehicles.

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Section: A Modulation Strategiesmentioning

confidence: 99%

Key Components of Modular Propulsion Systems for Next Generation Electric Vehicles

et al. 2017

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“…Thus the volume of the switching-ripple filters can be significantly reduced in the 3ΦDAB converter. However, similarly to 1ΦDAB converter, the 3ΦDAB converter with phase-shifted modulation still performs poor efficiency at low-power operation [16][17][18][19][20][21]. In [20], a hybrid modulation strategy was proposed for the 3ΦDAB converter, including phase-shifted, triangular and trapezoidal modulations.…”

Section: Review Of Dab Operationmentioning

confidence: 99%

Hybrid Modulation of Bidirectional Three-Phase Dual-Active-Bridge DC Converters for Electric Vehicles

Wang

Lee

2016

Energies

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Bidirectional power converters for electric vehicles (EVs) have received much attention recently, due to either grid-supporting requirements or emergent power supplies. This paper proposes a hybrid modulation of the three-phase dual-active bridge (3ΦDAB) converter for EV charging systems. The designed hybrid modulation allows the converter to switch its modulation between phase-shifted and trapezoidal modes to increase the conversion efficiency, even under light-load conditions. The mode transition is realized in a real-time manner according to the charging or discharging current. The operation principle of the converter is analyzed in different modes and thus design considerations of the modulation are derived. A lab-scaled prototype circuit with a 48V/20Ah LiFePO 4 battery is established to validate the feasibility and effectiveness.

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“…Various modulation schemes for the 3DAB converter to improve the problem of poor efficiency at partial load conditions have been proposed and comparted in [5]. The proposed new combined modulation of the 3DAB with triangular and trapezoidal can be optimized to overcome the poor performance at low load conditions.…”

Section: Introductionmentioning

confidence: 99%

Geometry optimization and characterization of three-phase medium frequency transformer for 10kVA Isolated DC-DC converter

Lee

Vakil

Watson

et al. 2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-Three-phase Dual Active Bridge converter is advisable for the High-power DC-DC conversion system. In the ac link, galvanically isolated transformer operated at a medium frequency range provides stepping up or down of the secondary bridge voltage. This paper provides a magnetic design optimization of the medium frequency transformer for maximizing its efficiency when excited by a non-sinusoidal waveform. In this paper, a mathematical design of a 10kVA non-sinusoidal transformer had been developed and validated using two-dimensional (2D) transient finite element analysis (FEA). The set of selected design variables is defined in order to enhance the power density and efficiency of the targeted transformer and an optimization is carried out. Finally, a 10kVA transformer is prototyped and the results of core losses for nonsinusoidal excitation is confirmed experimentally.

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Enhanced Modulation Strategy for a Three-Phase Dual Active Bridge—Boosting Efficiency of an Electric Vehicle Converter

Cited by 148 publications

References 11 publications

Key Components of Modular Propulsion Systems for Next Generation Electric Vehicles

Key Components of Modular Propulsion Systems for Next Generation Electric Vehicles

Hybrid Modulation of Bidirectional Three-Phase Dual-Active-Bridge DC Converters for Electric Vehicles

Geometry optimization and characterization of three-phase medium frequency transformer for 10kVA Isolated DC-DC converter

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