Modern Heat Extraction Systems for Power Traction Machines—A Review

Popescu, Mircea; Staton, D.A.; Boglietti, Aldo; Cavagnino, Andrea; Hawkins, D.; Goss, James

doi:10.1109/tia.2016.2518132

Cited by 112 publications

(67 citation statements)

References 6 publications

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“…The control strategy and the theory behind the models in this paper are fully described in [9], [10], [12], [17]. 2) N/A Shaft grove jacket (EGW50/50) 1) Wound field motor 2) Induction and wound field motor…”

Section: Battery Electrical Vehicles Solutionsmentioning

confidence: 99%

“…Considering the specifications from Table VIII, we can investigate the peak and continuous performance of the synchronous PM, when two materials are used for the stator winding: (a) copper; (b) pressed aluminium coils. The pressed aluminium winding is a technology that would allow packing more material in a pre-formed coil and hence reducing the resistance of the coil, while increasing the thermal conductivity through a better contact between wires [7,17] The main design parameters of the synchronous permanent motor MHEV solution are listed in Table IX. Fig.…”

Section: Mild Hybrid Electrical Vehicles Solutionsmentioning

confidence: 99%

See 1 more Smart Citation

Electrical Vehicles—Practical Solutions for Power Traction Motor Systems

Popescu

Goss

Staton

et al. 2018

IEEE Trans. on Ind. Applicat.

Self Cite

160

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This paper presents various solutions for the power traction motors of electrical vehicles. Equivalent designs to those commercially available on the roads are investigated. Potential simple modifications of the winding configurations and cooling system are studied: (a) flat wire (hairpin) winding vs stranded round wire in induction, synchronous permanent magnet and wound field machine topologies, (b) winding material grades effect-copper vs aluminum, (c) cooling systems-water jacket vs spray, fluid properties and flow rate.

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Section: Battery Electrical Vehicles Solutionsmentioning

confidence: 99%

Section: Mild Hybrid Electrical Vehicles Solutionsmentioning

confidence: 99%

Electrical Vehicles—Practical Solutions for Power Traction Motor Systems

Popescu

Goss

Staton

et al. 2018

IEEE Trans. on Ind. Applicat.

Self Cite

160

View full text Add to dashboard Cite

show abstract

“…Lately, the increasing use of compact machines with high power density, especially for traction applications has created interest in special cooling systems for electrical machines. Some of them are reviewed and discussed in [19][20][21]. Nevertheless, all the cooling systems are designed in order to keep the temperature of the machine under a safe limit.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines

et al. 2019

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Thermal loading can induce mechanical stresses in the windings of electrical machines, especially those impregnated with epoxy resins, which is mostly the case in modern traction motors. Although designers look for cooling techniques that give better performance in terms of the power density and efficiency of the machine, several thermal cycles can lead to fatigue and the degradation of the copper insulation, epoxy and consequently the windings. In this paper, the performance of different cooling techniques has been compared based on the temperature distribution and the mechanical stress induced in the windings. Three-dimensional finite element thermo-mechanical models were built to perform the study. Two different variants of water jacket cooling, two configurations of direct coil cooling and two cases of combined water jacket and direct coil cooling methods have been considered in the paper. The results show that the combined water jacket and direct coil cooling perform the best in terms of the temperature and also the mechanical stress induced in the windings. An experimental set-up is built and tested to validate the numerical results.

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“…The stator and rotor laminations will also heat up and can get damaged due to overheating. [2] To limit the temperature of the laminations and coils, several cooling methods can be applied. The most convenient cooling method used for electric machines is water jacket cooling, but this cooling method is located relatively far away from the coils where most of the heat is generated in this case [3].…”

Section: Introductionmentioning

confidence: 99%

“…The most convenient cooling method used for electric machines is water jacket cooling, but this cooling method is located relatively far away from the coils where most of the heat is generated in this case [3]. Different attempts have already been studied to increase the power density by using advanced cooling methods for the SRM [2]. By analysing the different proposals, two main principles can be observed.…”

Section: Introductionmentioning

confidence: 99%

Advanced Lumped Parameter Model for Switched Reluctance Motors With High Performance Cooling

Beyne¹,

Clarie²,

T’Jollyn³

et al. 2018

International Heat Transfer Conference 16

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In this paper an advanced thermal lumped parameter model for a switched reluctance electric motor (SRM) is constructed, based on a 2D thermal finite element simulation of a radial cross section of the motor. When applying and combining advanced cooling methods such as direct coil cooling, end winding cooling (radial stretched) and spray cooling on an SRM, the conventional lumped parameter models can no longer be used due to the 3D and complex temperature gradients in the motor. In standard LP models, mostly one simple cooling method is implemented by which the thermal gradients are also quite simple (1D or 2D). When combining different cooling methods, the gradients become highly 3D and these LPM are no longer valid. To improve the accuracy of this problem, a fully 3D thermal finite element simulation could be performed, but this would unnecessarily increase effort, complexity and computational time. To avoid this an advanced lumped parameter model is constructed in this paper, such that the high thermal gradients are modeled in more detail. The results from one 2D finite element simulation of a radial cross section of half of a stator tooth are reduced to a simpler lumped parameter model with more nodes in the most crucial parts, i.e., where the highest thermal gradients are expected. The 2D thermal model is then expanded to a 3D lumped parameter model, including the gradients in axial direction. Using this model, various cooling configurations and geometry parameters can be varied easily such that the design of an SRM with advanced cooling can be optimized efficiently.

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Modern Heat Extraction Systems for Power Traction Machines—A Review

Cited by 112 publications

References 6 publications

Electrical Vehicles—Practical Solutions for Power Traction Motor Systems

Electrical Vehicles—Practical Solutions for Power Traction Motor Systems

Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines

Advanced Lumped Parameter Model for Switched Reluctance Motors With High Performance Cooling

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