Evaluation of heat transfer characteristic of Aluminum Nitride (AlN) potting compound for the end windings of permanent magnet synchronous machines

Yao, Yi; Gu, Lingyun; Fan, Tie; Sun, Wei; Luo, Jian

doi:10.1109/iceceng.2011.6057645

Cited by 12 publications

(8 citation statements)

References 1 publication

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“…Yao et al [68] used a composite potting material containing aluminum-nitride inside (AlN). They predict the thermal conductivity of the silicon-based encapsulation material to be 40 W/mK after adding AlN.…”

Section: Figure 12 Temperature Measurements On the Motors Without Pomentioning

confidence: 99%

An Overview of Modern Thermo-Conductive Materials for Heat Extraction in Electrical Machines

2020

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This paper presents a comprehensive review of the modern thermo-conductive materials that have potential to improve the heat extraction in electrical machines by conduction. Currently, there is a significant interest in thermal design and analysis of electrical machines as the demand for high power/torque density is substantially raised in applications such as marine, aerospace, e-mobility and rail. Thermal design engineering has become very important to develop smaller and more efficient electric motors, therefore electrical machine designers need to be more informed with the recent development in novel thermoconductive (insulation) materials. Such developments can provide enhanced thermal characteristics for high power dense electrical machines. It is reported that high voltage electrical insulations can have more sophisticated thermal properties with the recent advancements in materials science. This study aims to inform electrical machine designers with and without a thermal background about recent thermo-conductive materials. Thus, a profound understanding can be gained in thermally conductive materials for the use of numerous applications in electrical machines for which thermal management is a crucial aspect of the overall multi-physics design and optimization process. INDEX TERMS Electrical machines, heat extraction, insulation materials, rotating machines, thermal analysis, thermal design, thermal conduction, and thermal materials This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.

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Section: Figure 12 Temperature Measurements On the Motors Without Pomentioning

confidence: 99%

An Overview of Modern Thermo-Conductive Materials for Heat Extraction in Electrical Machines

2020

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“…Thermoplastic materials were investigated to enhance the cooling of electrical devices. Yi Yao et al 9 used potting compound (Aluminum Nitride) with high thermal conductivity to improve PMSM heat dissipation. In their study, the rotor was excluded from the model.…”

Section: Introductionmentioning

confidence: 99%

“…The local high temperature region of the internal rotor PMSM is located at the end of the winding. 9,11 This paper investigates the temperature field in a PMSM by the computational fluid dynamics (CFD) software FLUENT and then suggests a motor cooling system including heat pipe with the aim to decrease the thermal resistance between the end winding and the cooling water. In this system, some of the heat produced at the end winding is transferred to the end cap by the heat pipe and then to the housing.…”

Section: Introductionmentioning

confidence: 99%

Improvement on the heat dissipation of permanent magnet synchronous motor using heat pipe

Wan

Sun

Wang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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A novel permanent magnet synchronous motor with heat pipe for electric vehicle is designed with the aim to reduce the end winding temperature. Software FLUENT is used to simulate the temperature fields. The temperature distribution profile of the winding of the permanent magnet synchronous motor with heat pipe is similar to that of the traditional permanent magnet synchronous motor. But the temperature values of the winding of the permanent magnet synchronous motor with heat pipe are lower than those of the traditional permanent magnet synchronous motor. The area of the region with relative low temperature at permanent magnet synchronous motor with heat pipe is also larger than at traditional permanent magnet synchronous motor. The highest temperature of the winding of the permanent magnet synchronous motor with heat pipe is 16.4°C lower than that of the traditional permanent magnet synchronous motor. The highest temperature and the lowest temperature of the lamination of the permanent magnet synchronous motor with heat pipe are all lower than those of the traditional permanent magnet synchronous motor. The temperatures of the two end caps of the permanent magnet synchronous motor with heat pipe are apparently higher than those of the traditional permanent magnet synchronous motor since some heat generated at the end winding is transferred to the end cap by the heat pipe. The low temperature area at the middle housing of the permanent magnet synchronous motor with heat pipe is larger than that of the traditional permanent magnet synchronous motor. The temperature discrepancy between the evaporator of the heat pipe and the end winding is about 60°C.

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“…One plastic with a thermal conductivity of 2 W/m•K was used to encapsulate the end windings of an axial flux machine; therefore a low thermal resistance path to the motor housing was established [9]. Due to its excellent thermal conductivity which is up to 150~300 W/m•K, aluminum nitride (Al N) has also been used to pot the end windings of motors such as the PMSM or axial flux motor [10,11].…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimal Design of Electro-Hydrostatic Actuator Driving Motors for Low Temperature Rise and High Power Weight Ratio

et al. 2018

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With the rapid development of technology, motors have drawn increasing attention in aviation applications, especially in the more electrical aircraft and all electrical aircraft concepts. Power weight ratio and reliability are key parameters for evaluating the performance of equipment applied in aircraft. The temperature rise of the motor is closely related to the reliability of the motor. Therefore, based on Taguchi, a novel multi-objective optimization method for the heat dissipation structural design of an electro-hydrostatic actuator (EHA) drive motor was proposed in this paper. First, the thermal network model of the EHA drive motor was established. Second, a sensitivity analysis of the key parameters affecting the cooling performance of the motor was conducted, such as the thickness of fins, the height of fins, the space of fins, the potting materials and the slot fill factor. Third, taking the average temperature of the windings and the power weight ratio as the optimization goal, the multi-objective optimal design of the heat dissipation structure of the motor was carried out by applying Taguchi. Then, a 3-D finite element model of the motor was established and the steady state thermal analysis was carried out. Furthermore, a prototype of the optimal motor was manufactured, and the temperature rise under full load condition tested. The result indicated that the motor with the optimized heat dissipating structure presented a low temperature rise and high power weight ratio, therefore validating the proposed optimization method.

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Evaluation of heat transfer characteristic of Aluminum Nitride (AlN) potting compound for the end windings of permanent magnet synchronous machines

Cited by 12 publications

References 1 publication

An Overview of Modern Thermo-Conductive Materials for Heat Extraction in Electrical Machines

An Overview of Modern Thermo-Conductive Materials for Heat Extraction in Electrical Machines

Improvement on the heat dissipation of permanent magnet synchronous motor using heat pipe

Multi-Objective Optimal Design of Electro-Hydrostatic Actuator Driving Motors for Low Temperature Rise and High Power Weight Ratio

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