Efficiency-optimal power partitioning for improved partial load efficiency of electric drives

Béthoux, Olivier; Remy, Ghislain; Berthelot, Éric

doi:10.1016/j.epsr.2016.09.014

Cited by 7 publications

(3 citation statements)

References 36 publications

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“…As automotive traction is characterized by very high power dynamics, it is crucial that η boost , the chopper efficiency, remains at a high value over a wide power range [50]. Toyota strategy is power splitting, which fits well with the large FC-rated current of several hundred Ampere [51,52]. Considering the Mirai, the power converter is thus made up of the parallel arrangement of four elementary switching cells whose commands are interleaved to minimize the current ripples in the FC as well as in the C Bus capacitor of the high voltage bus.…”

Section: The Electric Linementioning

confidence: 99%

Hydrogen Fuel Cell Road Vehicles: State of the Art and Perspectives

Béthoux

2020

Energies

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Driven by a small number of niche markets and several decades of application research, fuel cell systems (FCS) are gradually reaching maturity, to the point where many players are questioning the interest and intensity of its deployment in the transport sector in general. This article aims to shed light on this debate from the road transport perspective. It focuses on the description of the fuel cell vehicle (FCV) in order to understand its assets, limitations and current paths of progress. These vehicles are basically hybrid systems combining a fuel cell and a lithium-ion battery, and different architectures are emerging among manufacturers, who adopt very different levels of hybridization. The main opportunity of Fuel Cell Vehicles is clearly their design versatility based on the decoupling of the choice of the number of Fuel Cell modules and hydrogen tanks. This enables manufacturers to meet various specifications using standard products. Upcoming developments will be in line with the crucial advantage of Fuel Cell Vehicles: intensive use in terms of driving range and load capacity. Over the next few decades, long-distance heavy-duty vehicles and fleets of taxis or delivery vehicles will develop based on range extender or mild hybrid architectures and enable the hydrogen sector to mature the technology from niche markets to a large-scale market.

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Section: The Electric Linementioning

confidence: 99%

Hydrogen Fuel Cell Road Vehicles: State of the Art and Perspectives

Béthoux

2020

Energies

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“…This behaviour can be explained with the AC/DC converter topology adopted and the use of the control strategy known as phase shedding for efficiency improvement [57, 58].…”

Section: Endogenous Unbalance In Balanced Supply Conditionsmentioning

confidence: 99%

Unbalance characteristics of fundamental and harmonic currents of three‐phase electric vehicle battery chargers

Hernández

Langella²,

Caño

et al. 2020

IET Generation Trans & Dist

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Three‐phase electric vehicle (EV) battery chargers are expected to not impact the unbalance of distribution networks; moreover, using active power factor correction topologies they are expected to behave like resistive loads not affecting the system harmonic distortion. In this study, unexpected unbalance characteristics of fundamental and harmonic currents of three‐phase EV battery chargers are analysed by means of experimental tests performed on two EV cars of different technology. In order to quantify unbalance and harmonic distortion, proper comprehensive indices, in part developed in this study with specific reference to currents, are utilised. The unbalanced current absorbed even under ideal voltage balanced supply conditions by one of the two EV tested is shown and quantified constituting a real‐life case study of endogenous unbalance. Then, the influence of voltage unbalance supply conditions on fundamental and harmonic currents is evaluated by means of a proposed testing procedure, obtaining case studies of exogenous unbalance. The experimental results obtained for the two EVs should be extended to a larger set of cars; anyway, they show the need, before moving forward to full grid EV connection, for utilities and for designers to improve the current standard certification process and the control performances of three‐phase battery chargers.

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“…In this regard, along with the economic dimension of such problem as decrease of cash expenditures, for Water Supply Company there is a perceived problem with the low energy efficiency of operation of pump units associated with the use of water flow control via valve throttling. It is known that replacing valve control with variable frequency drive control allows to obtain energy savings up to 60% in similar systems [2]. Such authors as Bose, K. Bimal, B.S.…”

Section: Formulation Of the Problemmentioning

confidence: 99%

Assessment of the Charging Policy in Energy Efficiency of the Enterprise

Shutov

Turukina

Anisimov

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The forecasting problem for energy facilities with a power exceeding 670 kW is currently one of the main. In connection with rules of the retail electricity market such customers also pay for actual energy consumption deviations from plan value. In compliance with the hierarchical stages of the electricity market a guaranteeing supplier is to respect the interests of distribution and generation companies that require load leveling. The answer to this question for industrial enterprise is possible only within technological process through implementation of energy-efficient processing chains with the adaptive function and forecasting tool. In such a circumstance the primary objective of a forecasting is reduce the energy consumption costs by taking account of the energy cost correlation for 24 hours for forming of pumping unit work schedule. The pumping unit virtual model with the variable frequency drive is considered. The forecasting tool and the optimizer are integrated into typical control circuit. Economic assessment of the optimization method was estimated.

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Efficiency-optimal power partitioning for improved partial load efficiency of electric drives

Cited by 7 publications

References 36 publications

Hydrogen Fuel Cell Road Vehicles: State of the Art and Perspectives

Hydrogen Fuel Cell Road Vehicles: State of the Art and Perspectives

Unbalance characteristics of fundamental and harmonic currents of three‐phase electric vehicle battery chargers

Assessment of the Charging Policy in Energy Efficiency of the Enterprise

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