Investigation of Integrated Charging and Discharging Incorporating Interior Permanent Magnet Machine With Damper Bars for Electric Vehicles

Lu, Xiaomin; Iyer, K. Lakshmi Varaha; Mukherjee, Kaushik; Kar, Narayan C.

doi:10.1109/tec.2015.2467970

Cited by 29 publications

(12 citation statements)

References 13 publications

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“…The cost function is expressed by eq. (11), in which the ferromagnetic materials of the stator and rotor are set up as the base/unity value for all materials and the cost ratios are selected as typical values for high volume production [10].…”

Section: Optimization Results and Discussionmentioning

confidence: 99%

“…However, the low PM material utilization in flux-switching PM motors would increase the cost significantly [10]. In order to meet the requirements in both the low-speed range and the high-speed range simultaneously, interior permanent magnet synchronous motors (IPMSMs) whose PMs are embedded in the rotor are considered to be very promising candidates [11]- [13].…”

Section: Introductionmentioning

confidence: 99%

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Parametric Sensitivity Analysis and Design Optimization of an Interior Permanent Magnet Synchronous Motor

Chen

Lee

2019

IEEE Access

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Due to the advantages of high torque density, high efficiency, and wide constant power speed range (CPSR), interior permanent magnet synchronous motors (IPMSMs) are gaining more and more attention in electric vehicle (EV) applications. There are many geometrical parameters in IPMSMs, and some of them have significant impact on the performance of such machines. This paper presents a parametric sensitivity study of the rotor geometrical parameters for a V-shaped magnet IPMSM. In which, both the individual sensitivity and the combined sensitivity with considering the interaction effects of these parameters are performed by finite-element analysis (FEA). The electromagnetic characteristics in the low-speed range, including average torque, torque ripple, cogging torque, power density, power factor, efficiency, etc. and the flux-weakening capability in the high-speed range are investigated in detail. Based on the parametric study, the V-shaped magnet IPMSM is optimized. The results show that the performance of the optimal design is significantly improved. In addition, the validity of the FEA simulation results is verified by experiment with a prototype. INDEX TERMS Design optimization, interior permanent magnet synchronous motor, parametric sensitivity analysis.

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Section: Optimization Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parametric Sensitivity Analysis and Design Optimization of an Interior Permanent Magnet Synchronous Motor

Chen

Lee

2019

IEEE Access

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“…i xy = i x + ji y = 2/6 i a1 + a 2 i a2 + a 4 i b1 + a 6 i b2 + a 8 i c1 + a 10 i c2 (5) where a = exp(jδ) = cos δ + j sin δ and δ = 2π/6. Grid currents are given with (2), while the correlation between machine and grid currents is governed with (3).…”

Section: Appendix Amentioning

confidence: 99%

“…producing an undesired and harmful torque [4], [5]. It causes mechanical vibrations, acoustic noise, accelerated aging of the machine, and also has a negative impact on charging efficiency.…”

mentioning

confidence: 99%

Integration of Six-Phase EV Drivetrains Into Battery Charging Process With Direct Grid Connection

Subotić

Bodo²,

Levi

2017

IEEE Trans. Energy Convers.

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The paper proposes two novel topologies for integrated battery charging of electric vehicles. The integration is functional and manifests through re-utilization of existing propulsion drivetrain components, primarily a six-phase inverter and a six-phase machine, to serve as components of a fast (three-phase) charging system. An important feature of the proposed charging systems is that they are with direct grid connection, thus nonisolated from the mains. Torque is not produced in machines during the charging process. The paper provides a comprehensive evaluation of the novel systems, together with an existing topology. Various aspects of the considered chargers are detailed and elaborated, including current balancing, interleaving modulation strategy, and influence of rotor field pulsation on control and overall performance. A control strategy is proposed and the theory and control scheme are verified by experiments. Index Terms-Battery chargers, electric vehicles, integrated onboard chargers, multiphase machines. I. INTRODUCTION V ARIOUS concepts for battery charging of EVs have been proposed over the years, including fast dc (off-board) charging (Fig. 1(a)), battery swapping, inductive (wireless) charging, conventional on-board (Fig. 1(b)) and integrated onboard charging (Fig. 1(c)) [1]. The latter is a process in which already existing power electronic components, which exist onboard an EV and that are mandatory for vehicle propulsion, are re-utilized for charging. As fewer new elements are required for the charging process, the vehicle cost, weight and required space are significantly reduced. These advantages have in the last five years put integrated chargers under extensive research focus of both academic community and industry [2]. There are two main types of integrated chargers: those that take supply from a single-phase voltage source (slow) [3] and those that are attached to three-phase mains (fast) [4]. A distinct advantage of the three-phase over the single-phase integrated chargers is a much faster charging process. On the other hand, if a three-phase machine is integrated into three-phase charging process, three-phase currents flow through its windings,

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“…Existing solutions for integrated three-phase charging, with three-phase machines, inevitably involve torque production (unless extra components are added). Hence, use of mechanical brake is recommended [9]. An interesting solution is the one of [10], which uses a three-phase stator winding configuration in propulsion mode and an equivalent of symmetrical six-phase configuration in charging mode.…”

mentioning

confidence: 99%

An integrated on-board battery charger with a nine-phase PM machine

Bodo

Levi

Subotić

et al. 2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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Abstract-A fully integrated on-board battery charger for electrical vehicles (EVs) has been developed recently using a nine-phase machine. All the components used for propulsion are employed in the charging process, no additional components are required, and there is no need for hardware reconfiguration between charging and propulsion modes of operation. The proposed solution can be connected directly to single-phase or three-phase grid to perform charging, so that the expensive offboard charger infrastructure is not needed. The only requirement is to use a nine-phase machine in combination with a nine-phase inverter in the powertrain of the EV. This however inevitably brings in further advantages in the propulsion mode, such as increased fault tolerance and the current subdivision into more phases. The benefits of the topology, originally developed for an induction machine, make it interesting for further investigation. Therefore, the performance of the charger is examined here using a permanent magnet synchronous machine (PMSM). The results show that the charger topology is applicable to other types of synchronous machines and is, even more importantly, independent of the angular spatial shift between the individual three-phase windings of the nine-phase machine's stator. The results are comparable with those obtained using an induction machine and confirm the viability of the solution in conjunction with the PMSM as a propulsion motor.

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Investigation of Integrated Charging and Discharging Incorporating Interior Permanent Magnet Machine With Damper Bars for Electric Vehicles

Cited by 29 publications

References 13 publications

Parametric Sensitivity Analysis and Design Optimization of an Interior Permanent Magnet Synchronous Motor

Parametric Sensitivity Analysis and Design Optimization of an Interior Permanent Magnet Synchronous Motor

Integration of Six-Phase EV Drivetrains Into Battery Charging Process With Direct Grid Connection

An integrated on-board battery charger with a nine-phase PM machine

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