Thermal modeling of directly-oil-cooled permanent magnet synchronous machine

New combination of an electrical machine and a two-step planetary gear for high torque traction applications is introduced. This kind of a machine can act as a propulsion motor for working machines such as e. q. agricultural tractor that needs to generate very high traction forces and also higher travelling speeds. The technology also suits in some road vehicle use e.g. for buses or trucks. Detailed information about the electrical machine design is provided. The machine has tooth-coils in the stator, embedded permanent magnets in the rotor and its cooling is arranged via the gear lubrication as the chamber is semi-filled with oil.

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“…In our university we have previous knowledge of what comes the direct oil cooling. This can be found in [11], [20].…”

Section: Calculation Resultsmentioning

confidence: 99%

Design of a traction motor with two-step gearbox for high-torque applications

Montonen¹,

Sinkko²,

Lindh

et al. 2014

2014 International Conference on Electrical Machines (ICEM)

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“…The components with similar temperatures are lumped together to represent a single node. Then, thermal resistances are placed in the circuit to separate the nodes, so that the model also shows the heat transfer pathways in the machine [5]. In addition, the power sources are placed at nodes where losses occur.…”

Section: Research Methods 21 Lumped Parameter Modelmentioning

confidence: 99%

Thermal Modelling for Permanent Magnet Synchronous Machine (PMSM)

Aziz¹,

Atkinson²,

Salimin³

2017

IJPEDS

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<span>It is important to predict the temperature in some of the essential parts in machine design to prevent the machine from any damage. Most researchers usually not given much attention on thermal analysis during machine design as much as the electromagnet design. Therefore, in this study, two types of thermal modelling were proposed to predict the temperature of a permanent magnet synchronous machine (PMSM). Infolytica ThermNet software has been used since the software is related to Infolytica Magnet and the losses obtained from the electromagnetic field analysis are used as the heat source in the thermal analysis. Comparison has been done between the predicted temperature from lumped parameter model and finite element analysis. The results also will be validated by using experimental setup. Since Infolytica Magnet has been used to analyse the electromagnetic output therefore finite element analysis model is the better choice.</span>

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“…Hence, some scholars have devoted themselves to this field and two mainstream analysis methods (numerical method [2]- [4] and lumpedparameter method [5]- [14] and) have been developed. The main advantage of numerical method in solving the temperature distribution inside an electric machine is that heat conduction can be more accurately solved.…”

Section: Introductionmentioning

confidence: 99%

Thermal model of totally enclosed water-cooled permanent magnet synchronous machines for electric vehicle applications

Zhang

et al. 2014

2014 International Conference on Electrical Machines (ICEM)

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Totally enclosed water-cooled permanent magnet machines (TEWCPMMs) have been widely applied in electric vehicles (EVs) due to its advantages of high torque density, high power factor and strong overloading capacity. However, the TEWCPMM is often experienced with extremely high ambient temperature in very limited space, which may lead to serious machine faults. In order to investigate thermal performance deeply, after investigation on the air convection within the end-space, this paper presents a thermal model, which takes the influence of the air temperature within the end-space on the temperature distribution by convection into consideration. Combining electromagnetic finite-element analysis (FEA) with thermal resistance network (TRN) of the TEWCPMM, the thermal model is established, which is based on the law of heat flux balance in two continuous iterative calculations. Finally, experiments are performed on a 36-kW prototype to validate the proposed thermal model.Index Terms--Convection heat transfer, electric vehicles (EVs), finite-element analysis (FEA), thermal contact resistance, thermal resistance network (TRN), totally enclosed water-cooled permanent magnet machines (TEWCPMMs).

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Thermal modeling of directly-oil-cooled permanent magnet synchronous machine

Cited by 73 publications

References 5 publications

Design of a traction motor with two-step gearbox for high-torque applications

Design of a traction motor with two-step gearbox for high-torque applications

Thermal Modelling for Permanent Magnet Synchronous Machine (PMSM)

Thermal model of totally enclosed water-cooled permanent magnet synchronous machines for electric vehicle applications

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