Development of an interior permanent magnet motor through rotor cooling for electric vehicles

Lee, Kea-Ho; Cha, Hyun-Rok; Kim, Young‐Bae

doi:10.1016/j.applthermaleng.2015.11.022

Cited by 101 publications

(29 citation statements)

References 9 publications

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“…In permanent magnet motor applications, liquid cooling prevails due to their excellent heat dissipation ability. Lee et al [60] developed an optimum flow path to cool both the rotor and stator for a permanent magnet motor, and the structure is shown in Fig. 10.…”

Section: The Thermal Management Of Permanent Magnet Motormentioning

confidence: 99%

“…In another similar research, Wang et al [67] claimed the using of phase change material operated well in extending the safety time duration. The cooling structure of oil loop [60] There are air cooling, jacket cooling with oil, water, water/glycol, spray cooling and PCMs used for the motors. Generally, air cooling is a economical choice for the motors with low heat density.…”

Section: The Thermal Management Of Permanent Magnet Motormentioning

confidence: 99%

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Thermal Management of Electrified Propulsion System for Low-Carbon Vehicles

Huang

Wang

et al. 2020

Automot. Innov.

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An overview of current thermal challenges in transport electrification is introduced in order to underpin the research developments and trends of recent thermal management techniques. Currently, explorations of intelligent thermal management and control strategies prevail among car manufacturers in the context of climate change and global warming impacts. Therefore, major cutting-edge systematic approaches in electrified powertrain are summarized in the first place. In particular, the important role of heating, ventilation and air-condition system (HVAC) is emphasised. The trends in developing efficient HVAC system for future electrified powertrain are analysed. Then electric machine efficiency is under spotlight which could be improved by introducing new thermal management techniques and strengthening the efforts of driveline integrations. The demanded integration efforts are expected to provide better value per volume, or more power output/torque per unit with smaller form factor. Driven by demands, major thermal issues of high-power density machines are raised including the comprehensive understanding of thermal path, and multiphysics challenges are addressed whilst embedding power electronic semiconductors, non-isotropic electromagnetic materials and thermal insulation materials. Last but not least, the present review has listed several typical cooling techniques such as liquid cooling jacket, impingement/spray cooling and immersion cooling that could be applied to facilitate the development of integrated electric machine, and a mechanic-electric-thermal holistic approach is suggested at early design phase. Conclusively, a brief summary of the emerging new cooling techniques is presented and the keys to a successful integration are concluded.

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Section: The Thermal Management Of Permanent Magnet Motormentioning

confidence: 99%

Section: The Thermal Management Of Permanent Magnet Motormentioning

confidence: 99%

Thermal Management of Electrified Propulsion System for Low-Carbon Vehicles

Huang

Wang

et al. 2020

Automot. Innov.

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“…Furthermore, we plan to design a method to minimize rotational interference from external foreign substances by developing a hermetic design. A self-oil cooling-type low heat generation structure supplementing the vulnerability of a hermetic structure to heat generation was designed and is proposed [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Field Analysis and Design of a Hermetic Interior Permanent Magnet Synchronous Motor with Helical-Grooved Self-Cooling Case for Unmanned Aerial Vehicles

2021

Self Cite

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As unmanned aerial vehicles expand their utilization and coverage, research is in progress to develop low-weight and high-performance motors to efficiently carry out various missions. An electromagnetic field interior permanent magnet (IPM) motor was designed and analyzed in this study that improved the flight performance and flight duration of an unmanned aerial vehicle (UAV). The output power and efficiency of a conventional commercial UAV motor were improved by designing an IPM motor of the same size, providing high power output and high-speed operation by securing high power density, wide speed range, and mechanical stiffness. The cooling performance and efficiency of the drive motor were improved without requiring a separate power source for cooling by introducing the helical-grooved self-cooling case, which has a low heat generation structure. Furthermore, the motor is oil-cooled through rotating power without a separate power source, reducing the weight of the UAV. The heat dissipation characteristics were verified by fabricating a prototype and taking actual measurements to verify the validity of the heat dissipation characteristics. The results of this study are expected to improve the flight duration and performance of UAVs and contribute to the efficiency of the design of a UAV drive motor.

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“…In order to overcome this drawback, an extra rotor cooling system is then used in such later-developed vehicles as the Tesla S60 [9], where the coolant is introduced into the system via a coupling connected to a stationary inner tube and is driven back to the gap between the injection tube and the hollow shaft. In addition, hollow-shaft cooling scheme has been combined with housing cooling [10] and the end winding spray cooling [11,12]. The much more detailed cooling approaches for automotive traction motors can be found in [13].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of an Oil-Cooled Shaft for a 30 000 r/min Automotive Traction Motor

Gai

Chong

Adam

et al. 2020

IEEE Trans. on Ind. Applicat.

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This paper investigates an oil-based shaft cooling system as applied to a 30,000 rpm automotive traction motor. Firstly, iron and air friction losses are identified over a range of operating speeds. Analytical and numerical approaches are then proposed to estimate thermal performance of steady and dynamic states, respectively. Finally, experiments are conducted to evaluate the impact characteristics of this cooling system, such as the rotational speed, the inlet coolant velocity and the amount of heat loss. Based on simulation and testing of prototype, the shaft rotational velocity can significantly enhance the heat exchange between coolant and internal surface of the hollow-shaft, across whole length of the shaft. However, when the rotational velocity reaches 30,000 rpm, the effect of high rotational velocities on heat exchange weakens due to the flow becoming saturated.

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Development of an interior permanent magnet motor through rotor cooling for electric vehicles

Cited by 101 publications

References 9 publications

Thermal Management of Electrified Propulsion System for Low-Carbon Vehicles

Thermal Management of Electrified Propulsion System for Low-Carbon Vehicles

Electromagnetic Field Analysis and Design of a Hermetic Interior Permanent Magnet Synchronous Motor with Helical-Grooved Self-Cooling Case for Unmanned Aerial Vehicles

Thermal Analysis of an Oil-Cooled Shaft for a 30 000 r/min Automotive Traction Motor

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