Direct oil cooling of traction motors in hybrid drives

Huang, Zhe; Nategh, Shafigh; Lassila, Viktor; Alaküla, Mats; Yuan, Jinliang

doi:10.1109/ievc.2012.6183163

Cited by 58 publications

(25 citation statements)

References 3 publications

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“…Two kinds of heat sources are applied, i.e., the iron losses (36 W in stator and 19 W in rotor) are applied on motor irons, and the copper loss (64 W) is applied in armature coils. More details about the boundary conditions between theory analysis and applications in JAMG can be found in [28,29]. As can be seen, the best heat dissipation of PMs is expected to be found in the PM-top one, since the magnets directly contact with the shell/housing.…”

Section: Heat Equivalent Circuitmentioning

confidence: 99%

Steady-State Characteristics Analysis of Hybrid-Excited Flux-Switching Machines with Identical Iron Laminations

2015

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Abstract:Since the air-gap field of flux-switching permanent magnet (FSPM) machines is difficult to regulate as it is produced by the stator-magnets alone, a type of hybrid-excited flux-switching (HEFS) machine is obtained by reducing the magnet length of an original FSPM machine and introducing a set of field windings into the saved space. In this paper, the steady-state characteristics, especially for the loaded performances of four prototyped HEFS machines, namely, PM-top, PM-middle-1, PM-middle-2, and PM-bottom, are comprehensively compared and evaluated based on both 2D and 3D finite element analysis. Also, the influences of PM materials including ferrite and NdFeB, respectively, on the characteristics of HEFS machines are covered. Particularly, the impacts of magnet movement in the corresponding slot on flux-regulating performances are studied in depth. The best overall performances employing NdFeB can be obtained when magnets are located near the air-gap. The FEA predictions are validated by experimental measurements on corresponding machine prototypes.

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Section: Heat Equivalent Circuitmentioning

confidence: 99%

Steady-State Characteristics Analysis of Hybrid-Excited Flux-Switching Machines with Identical Iron Laminations

2015

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“…As discussed in [2], there are two different positions of forced cooling channels in electric motors. The conventional way is to make spiral channels in a radial direction in the housing; or drilling/cutting ducts in the axial direction in the housing.…”

Section: Introductionmentioning

confidence: 98%

“…Therefore, with the aim of eliminating the uncertain contact resistance between housing and stator back direct cooling methods where the coolant is in direct contact with the hot stator back is preferred. Fig.1 [2] shows an example of applying direct cooling channels into the housing. Besides, the direct cooling channel can be made either in the stator back, or in the stator back and the housing at the same time.…”

Section: Introductionmentioning

confidence: 99%

Characterization and application of forced cooling channels for traction motors in HEVs

Huang

Márquez

Alaküla

et al. 2012

2012 XXth International Conference on Electrical Machines

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This paper presents the characterization of forced cooling channels with three different shapes which are applied in traction motors mounted in Hybrid Vehicles (HEVs) or Zero Emission Vehicles (ZEVs). Generally, there are two different positions of forced cooling channels in electric motors. One way is by drilling holes or cutting cooling channels inside the housing, which is called indirect cooling approach. The other way is to cut the cooling channels at the edges of housing or/and stator back to form direct cooling channels, where the coolant is in direct contact with the hot stator back. In both cases, choosing suitable shapes of cooling channels are necessary.In this paper, both heat transfer coefficient hf and pump power pump W are calculated. The dimensional parameters are easily understood and also used for further thermal analysis of the completed machine by either Finite Element Analysis (FEA) or lumped parameter approaches. In addition, the dimensionless parameters Nusselt number Nu and Darcy friction factor f are evaluated with the aim to understand the characterizations for different channels. These parameters are easily used for further cooling channels optimization. In the end, the thermal analyses for a stator segment with three different shaped channels are carried on by applying the calculated results from Computational Fluid Dynamics (CFD) simulations.

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“…Paper [15] presents comparisons of utilizing direct oil cooling approaches and conventional indirect cooling approaches for electrical motors mounted in hybrid electric vehicles or in zero emission vehicles.…”

Section: Introductionmentioning

confidence: 99%

Integrated Electro-Hydraulic Machine with Self-Cooling Possibilities for Non-Road Mobile Machinery

Ponomarev¹,

Minav²,

Åman³

et al. 2015

SV-JME

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Over the past few years, due to the introduction of Tier 4 emission legislations, new developments for non-road mobile machinery (NRMM• Two cooling schematics are proposed for an integrated electro-hydraulic energy converter.• Integrated electro-hydraulic energy converter can be utilized with a passive cooling scheme.• The proposed self-cooling concept allows a decrease in the power consumption in NRMM applications.

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Direct oil cooling of traction motors in hybrid drives

Cited by 58 publications

References 3 publications

Steady-State Characteristics Analysis of Hybrid-Excited Flux-Switching Machines with Identical Iron Laminations

Steady-State Characteristics Analysis of Hybrid-Excited Flux-Switching Machines with Identical Iron Laminations

Characterization and application of forced cooling channels for traction motors in HEVs

Integrated Electro-Hydraulic Machine with Self-Cooling Possibilities for Non-Road Mobile Machinery

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