Efficiency investigation for electric vehicle powertrain with variable DC-link bus voltage

Prabhakar, Kashyap Kumar; Ramesh, M.; Dalal, Ankit; Reddy, C. Upendra; Singh, Amit Kumar; Kumar, Praveen

doi:10.1109/iecon.2016.7793714

Cited by 20 publications

(14 citation statements)

References 15 publications

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“…However, controlling the voltage level to reduce losses has been known technique, for example in electric vehicles. Therein, varying the voltage based on propulsion motor load is found to reduce losses, especially at low loads [4][5][6]. At lower loads, propulsion motor is operated at voltage level lower than nominal.…”

Section: Introductionmentioning

confidence: 99%

“…Contrary to [4][5][6], where DC voltage level is proposed to be adjusted based on propulsion drive operation point, this paper proposes to control the DC bus voltage based on the FC operation point. In particular during partial loads, the FC converter (a buck-boost type) is proposed to be operated in Freewheeling mode, where current is left to freely flow to the DC bus and the converter is operating with zero switching loses.…”

Section: Introductionmentioning

confidence: 99%

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A variable DC approach to minimize drivetrain losses in fuel cell marine power systems

Haxhiu

Kyyrä

Chan

et al. 2019

2019 IEEE Power and Energy Conference at Illinois (PECI)

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This paper presents a method of operating a zeroemission power system in marine vessels. The main goal of the proposed method is to reduce losses of drivetrain devices. The power sources considered in this work are proton exchange membrane fuel cell and lithium-ion battery while the main power consumers are induction motors. Both sources and consumers are connected to a common DC bus through power conversion devices. In the proposed method, the DC bus voltage level is controlled according to the loading of the fuel cells. By controlling the DC bus voltage, it allows operation of fuel cell DC/DC converter in Freewheeling mode which significantly reduces the converter losses. In addition, this approach is also expected to reduce the motor and battery drive losses. Feasibility of the proposed operation method and loss calculations are presented on a realtime hardware-in-loop simulator consisting of real control units and virtual power device models.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A variable DC approach to minimize drivetrain losses in fuel cell marine power systems

Haxhiu

Kyyrä

Chan

et al. 2019

2019 IEEE Power and Energy Conference at Illinois (PECI)

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“…Considering ΔT e2 of (27), torque ripple can be regulated by varying the magnitude of three factors: Reduction in torque ripple is achieved, using small T s , by selecting appropriate flux linkage value and varying magnitude of v s using dc-dc converter, which can regulate the dc input voltage of an inverter. From (27), the magnitude of v s is one of the possible parameters to reduce the ΔT. The required value v s is evaluated using (21).…”

Section: Dc-link Voltage Impact On Torque Ripplementioning

confidence: 99%

“…Using this strategy, the magnitude of v s as described in (21) is varied. As a result, the torque ripple is reduced because the (27). The torque ripple and root mean square error (RMSE) for both drivetrains P 1 and P 2 are listed in Table 5, for the load torque of 1.5 Nm.…”

Section: Dynamic Performancementioning

confidence: 99%

“…However, most of the works are limited to PM synchronous motor‐based drivetrains and few works are limited to IM‐based drivetrains [26]. In [27], the efficiency comparison between two IM‐based drivetrains based on

V_{dc}

selection is discussed. Moreover, most of the reported works give the efficiency analysis for limited torque and speed range, but they do not give an idea on drive cycles that an EV might expect on the road.…”

Section: Introductionmentioning

confidence: 99%

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Efficiency and performance analysis of DTC‐based IM drivetrain using variable dc‐link voltage for electric vehicle applications

Prabhakar

Chinthakunta

Singh

et al. 2018

IET Electrical Systems in Transportation

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In recent times, there has been a surge in R&D activities in the area of electric vehicles (EVs). This surge is fuelled by various governmental policies that aim at increasing the penetration of EVs on roads. This work aims at developing and analyzing drivetrain configurations for city commute vehicles. Since city commute involves frequent start stops, it is necessary to focus on the dynamic performance as well as the system efficiency. Here two drivetrain configurations are considered. The first has a battery pack, an inverter, and an induction motor while the second configuration has an additional dc-dc converter. A detailed control strategy for each drivetrain is presented. Moreover, an experimental setup is developed that mimics the behavior of a scaled-down vehicle. Both the configurations are subjected to extensive experimentation using the developed setup and it is found that despite the use of an additional dc-dc converter, the second configuration has better overall system efficiency in city driving conditions. To explain the results, detailed efficiency maps of the individual subsystem and the overall system are also presented. Furthermore, the drive cycle response and energy consumption analysis, for both the drivetrains for NYCC and city part-NEDC are presented.

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Neural network based variable DC-link voltage control of electric vehicle driveline

Shukla,

Sharma

2024

Smart Science

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Efficiency investigation for electric vehicle powertrain with variable DC-link bus voltage

Cited by 20 publications

References 15 publications

A variable DC approach to minimize drivetrain losses in fuel cell marine power systems

A variable DC approach to minimize drivetrain losses in fuel cell marine power systems

Efficiency and performance analysis of DTC‐based IM drivetrain using variable dc‐link voltage for electric vehicle applications

Neural network based variable DC-link voltage control of electric vehicle driveline

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