An integrated on-board charger with direct grid connection for battery electrical vehicle

Liu, S.; Hahlbeck, S.; Schoenen, Timo; Hameyer, Kay

doi:10.1109/speedam.2012.6264406

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…The impact of avoiding isolation for one of the currently most attractive fast charging configurations [3] is assessed in a study performed in [4]. It is shown that, if isolation does not exist, the common mode voltage appears between the battery and the ground.…”

Section: Introductionmentioning

confidence: 99%

“…Since typically some small parasitic capacitances exist between the chassis of EV and its battery, this can cause problems in battery management system, as well as high displacement currents that can flow through the protection earth conductor. These currents can significantly exceed the permitted limit that is set due to safety concerns if a proper mitigating technique is not employed (one of these may be the integration of a filter capacitor between the protection earth conductor and the neutral conductor [4]). …”

Section: Introductionmentioning

confidence: 99%

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Isolated Chargers for EVs Incorporating Six-Phase Machines

Subotić

Bodo

Levi

et al. 2016

IEEE Trans. Ind. Electron.

105

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The paper considers two isolated solutions for fast charging of electric vehicles (EVs). The isolation is located on the grid side (off-board), while the rest of the charging apparatus is placed on-board the EV and it entirely consists of the existing power electronics components that would be otherwise used only for propulsion. Thus, substantial savings on the space, weight, and cost are achieved. The considered configurations fully incorporate either a symmetrical or an asymmetrical six-phase machine, as well as a six-phase inverter, into the charging process. Due to the nature of the connections, torque production is avoided during the charging/vehicle-to-grid (V2G) modes of operation. Thus the machines do not have to be mechanically locked, and their rotors naturally stay at standstill. Control schemes for both configurations are elaborated, and theoretical results are validated by experiments for the two configurations in both charging and V2G modes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isolated Chargers for EVs Incorporating Six-Phase Machines

Subotić

Bodo

Levi

et al. 2016

IEEE Trans. Ind. Electron.

105

View full text Add to dashboard Cite

show abstract

“…When a converter operates in buck or boost regime, the signal v i is delivered through a non-linear compensation block defined by (12) or (13), which are shown in the 'controller' area in Fig. 3.…”

Section: Non-linear Compensationmentioning

confidence: 99%

“…With complementarity of operation, several components of system are shared. The integrated chargers' configurations can be divided into two major categories: Singlephase [1,2,6,[8][9][10][11] or three-phase fast-integrated chargers [1][2][3][4]12]. The integrated converters are connected to the main grid, so it is necessary that they are working with the possibility of power factor (PF) correction as is discussed in [13][14][15], where the authors paid attention to digitalised algorithms.…”

Section: Introductionmentioning

confidence: 99%

Control of integrated single‐phase PFC charger for EVs

Truntič

Konjedic

Milanovič

et al. 2018

IET Power Electronics

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This study discusses a converter structure appropriate for charging the batteries of an electric vehicle (EV). The structure is obtained by a transformation of a conventional three-phase inverter, which is already present in an EV's power-train system. Since the motor inverter's semiconductor components and the electric motor's windings form the battery charger's circuit, a reduction in the power-train system's size and weight is achievable. The proposed fully integrated battery charger operates alternately in two modes, buck and boost, while providing power factor (PF) correction capability continuously. This study also proposes an input current control strategy that ensures smooth operating mode transitions, which occur during the operation of a battery charger. The control is entirely implemented within a microcontroller and ensures operation with a high PF and low total harmonic distortion of the input current. The performance of the discussed converter using the proposed control scheme was verified experimentally.

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“…Its presence or absence has no impact on the principles of operation of the considered topologies, and similar to [7], [10], and [12], it is not used in the experimental setup. Meeting safety regulations with nonisolated charging could be achieved by various techniques, one of which is described in [26].…”

Section: Theoretical Analysismentioning

confidence: 99%

Single-Phase On-Board Integrated Battery Chargers for EVs Based on Multiphase Machines

Subotić

Bodo

Levi

2016

IEEE Trans. Power Electron.

123

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The paper considers integration of multiphase (more than three phases) machines and converters into a single-phase charging process of electric vehicles (EVs) and, thus, complements recently introduced fast charging solutions for the studied phase numbers. One entirely novel topology, employing a five-phase machine, is introduced and assessed jointly with three other topologies that use an asymmetrical nine-phase machine, an asymmetrical six-phase machine, and a symmetrical six-phase machine. In all topologies, both charging and vehicle-to-grid (V2G) mode are viable. Moreover, all are capable of unity power factor operation. A torque is not produced in machines during charging/V2G process so that mechanical locking is not required. Hardware reconfiguration between propulsion and charging/V2G mode is either not required or minimized by using a single switch. Theoretical analysis of operating principles is given, and a control scheme, applicable to all topologies and which includes current balancing and interleaving strategy, is developed. Finally, operation of all topologies is compared by means of experiments in both charging and V2G mode, with a discussion of influence of current balancing and interleaving strategy on the overall performance. Index Terms-Battery chargers, electric vehicles (EVs), integrated on-board chargers, multiphase machines. I. INTRODUCTION E LECTRIC vehicles (EV) drivetrain and charging equipment are never used simultaneously. This allows integration of drivetrain power electronics, primarily an electric machine and an inverter, into the charging process, as an alternative to nonintegrated wired or wireless battery charging [1], [2]. The accomplishments of the integration are savings on cost, weight and space in the vehicle. Although three-phase machines are a preferable choice for propulsion [3], they cannot be easily integrated into fast (three-phase) charging process. The major obstacle is that a rotating field gets produced when three-phase currents flow through the machine. This demands various techniques in order to avoid torque production [4]-[6], which always include additional nonintegrated elements. Hence, the cost and complexity of the system are increased.

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An integrated on-board charger with direct grid connection for battery electrical vehicle

Cited by 10 publications

References 4 publications

Isolated Chargers for EVs Incorporating Six-Phase Machines

Isolated Chargers for EVs Incorporating Six-Phase Machines

Control of integrated single‐phase PFC charger for EVs

Single-Phase On-Board Integrated Battery Chargers for EVs Based on Multiphase Machines

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