Fault-Tolerant In-Wheel Motor Topologies for High-Performance Electric Vehicles

Ifedi, C.J.; Mecrow, B.C.; Brockway, Simon; Boast, G.S.; Atkinson, Glynn; Kostic-Perovic, D.

doi:10.1109/tia.2013.2252131

Cited by 138 publications

(55 citation statements)

References 25 publications

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“…Table 1 summarizes some typical specifications of the electric drive systems, i.e., the commercial Prius and Protean Electric drive systems [32][33][34], the radial-flux PM hub machine developed by Rix and Kamper [35], and the direct-drive machine investigated in this paper. The 2004 Prius uses a high-speed machine with an additional gear box, so the number of poles is relatively low.…”

Section: Machine Specification and Slot/pole Combinations Choicementioning

confidence: 99%

Research on a 20-Slot/22-Pole Five-Phase Fault-Tolerant PMSM Used for Four-Wheel-Drive Electric Vehicles

Sui

Zheng

et al. 2014

Energies

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This paper presents a five-phase fault-tolerant permanent-magnet synchronous machine (PMSM) used for electric vehicles. In multiphase fault-tolerant PMSMs equipped with fractional-slot concentrated windings, excessive magneto-motive force (MMF) harmonics can lead to thermal demagnetization of the permanent magnets (PMs). In order to reduce the lower-order harmonics, the origins of the 2-pole harmonic in conventional winding configurations are investigated, and an unequal-turn winding configuration is applied to cancel the lower-order harmonics. The main electromagnetic performances of the unequal-turn winding configuration are investigated and compared with conventional winding topologies. Based on the principle of maintaining constant instantaneous power, the fault-tolerant control strategies for open-circuits of up to two phases are developed. All of the investigations are verified by finite element analysis (FEA) results.

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Section: Machine Specification and Slot/pole Combinations Choicementioning

confidence: 99%

Research on a 20-Slot/22-Pole Five-Phase Fault-Tolerant PMSM Used for Four-Wheel-Drive Electric Vehicles

Sui

Zheng

et al. 2014

Energies

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“…With the increasing development of the electric vehicles (EVs), the outer-rotor in-wheel motors have been considered as one of the promising candidates because they can offer the potential superior features of quick torque response, weight reduction, and compact vehicle space [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Performances Evaluation of an Outer-Rotor Flux-Switching Permanent Magnet Motor Based on Electrical-Thermal Two-Way Coupling Method

Shu¹,

Zhu²,

Li³

et al. 2017

Preprint

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Flux-switching permanent magnet (FSPM) motors have gained increasing attention in the electric vehicles (EVs) applications due to the advantages of high power density, high efficiency. However, the heat sources of both permanent magnet (PM) and armature winding are located on the limited stator space in the FSPM motors, which may result in the PM overheated and irreversible demagnetization caused by temperature rise and it is often ignored in the conventional thermal analysis. In this paper, a new electrical-thermal two-way coupling design method is proposed to analyze the electromagnetic performances, where the change of PM material characteristics under different temperatures is taken into consideration. Firstly, the motor topology and design equations are introduced. Secondly, the demagnetization curves of PM materials under different temperatures are modeled due to PM materials are sensitive to the temperature. And based on the electrical-thermal two-way coupling method, the motor performances are evaluated in details, such as the load PM flux linkage and output torque. Then, the motor is optimized, and the electromagnetic performances between initial and improved motors are compared. Finally, a prototype motor is manufactured, and the results are validated by experimental measurements.

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“…Numerical methods, like Finite Element Analysis (FEA), are extremely useful tools because they are versatile and accurate. However, the computation time tends to be high and in general it is difficult to gain an insight from the these solutions unless several geometries are analysed; some numerical solvers provide tools for parametric analysis for this purpose [6], [7]. Numerical methods remain very useful tools for the validation and the refinement of the final design.…”

Section: Introductionmentioning

confidence: 99%

Analysis of slotting models for the calculation of no-load rotor losses in PM machines

Anglada

Sharkh

Qazalbash

2016

2016 XXII International Conference on Electrical Machines (ICEM)

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Abstract-The magnetic flux density distribution in the airgap of electric machines is essential for accurate prediction of no-load eddy-current power losses. The effect of slotting can be modelled using a simplified single-slot model or a complete multiple-slots model. Until now there has not been a clear and justified criterion to choose between the two models. In this paper we propose a criterion based on the conformal transformations used to calculate the magnetic field distribution of single-slot and multiple-slots models. The computational implementation of both methods produced a graph that clearly shows which method to use as a function of the normalised geometrical parameters of the machine. The paper presents a case study of a high speed machine whose proportions fall within the multiple-slot model range, according to the criterion proposed. It is shown that using a single slot model in this case results in significant errors in the estimation of rotor losses. Better agreement with FEA results is achieved when a multipleslot model is used.

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Fault-Tolerant In-Wheel Motor Topologies for High-Performance Electric Vehicles

Cited by 138 publications

References 25 publications

Research on a 20-Slot/22-Pole Five-Phase Fault-Tolerant PMSM Used for Four-Wheel-Drive Electric Vehicles

Research on a 20-Slot/22-Pole Five-Phase Fault-Tolerant PMSM Used for Four-Wheel-Drive Electric Vehicles

Electromagnetic Performances Evaluation of an Outer-Rotor Flux-Switching Permanent Magnet Motor Based on Electrical-Thermal Two-Way Coupling Method

Analysis of slotting models for the calculation of no-load rotor losses in PM machines

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