Loss Reduction Optimization for Heat Capacity Improvement in Interior Permanent Magnet Synchronous Machine

Seo, Mi Hae; Ko, Young-Yoon; Lee, Tae-Yong; Kim, Yong-Jae; Jung, Sang-Yong

doi:10.1109/tmag.2018.2843176

Cited by 14 publications

(7 citation statements)

References 13 publications

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“…However, the ideal current source does not have any other harmonics. Second, the equation for the iron loss is as follows [16][17][18]:…”

Section: Comparison Of Loss Analysis Using the Ideal Current Source And The Proposed Methodsmentioning

confidence: 99%

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Analysis and Verification of Traction Motor Iron Loss for Hybrid Electric Vehicles Based on Current Source Analysis Considering Inverter Switching Carrier Frequency

Lee¹,

Kim²,

Jung

2021

Electronics

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In this study, a current source analysis method considering the inverter switching frequency is proposed to improve the precision of loss analysis of a traction motor for a hybrid electric vehicle. Because the iron loss of the traction motor is sensitively influenced by input current fluctuations, the current source analysis using the actual current obtained from an inverter is the ideal method for accurate analysis. However, as the traction motor and inverter should be manufactured to obtain the real current, the traction motor is generally designed based on an ideal current source analysis. Our proposed method is an analytic technique that fits the loss of a traction motor similar to the actual loss by injecting harmonics of the same order of the inverter switching frequency into the ideal input current. Our method is compared with the analysis of the ideal current source to assess the difference in loss. In addition, a test motor was manufactured, and an efficiency test was conducted to compare the efficiency and verify the effectiveness of our method.

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“…However, the ideal current source does not have any other harmonics. Second, the equation for the iron loss is as follows [16][17][18]:…”

Section: Comparison Of Loss Analysis Using the Ideal Current Source And The Proposed Methodsmentioning

confidence: 99%

“…Waveform of torque, magnetic flux density, and magnetic flux line of the designed model in load condition. (a) Torque waveform of the designed model; (b) Magnetic flux density of the designed model.Second, the equation for the iron loss is as follows[16][17][18]:Piron = Ph + Pe (9)Ph = khfB m (1.5 < m < 2.5)(10)…”

mentioning

confidence: 99%

Analysis and Verification of Traction Motor Iron Loss for Hybrid Electric Vehicles Based on Current Source Analysis Considering Inverter Switching Carrier Frequency

Lee¹,

Kim²,

Jung

2021

Electronics

Self Cite

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“…Thermal field and mechanical stress of the rotor assembly are calculated in [2, 26]. The effect of thermal performance is confirmed through thermal analysis using a lumped‐parameter thermal network in a PM synchronous motor [27].…”

Section: Introductionmentioning

confidence: 99%

Loss estimation, thermal analysis, and measurement of a large‐scale turbomolecular pump with active magnetic bearings

Han

Zhang

et al. 2020

IET Electric Power Applications

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Temperature rise subjected to the copper losses and iron losses is an important issue for a magnetically suspended turbomolecular pump (MSTMP). In this study, the loss estimation, thermal analysis, and temperature rise measurement of a large‐scale MSTMP are investigated. The copper losses and the iron core losses of two radial magnetic bearings, a thrust magnetic bearing, and a brushless direct current motor (BLDCM) are predicted by the analytical models. Based on the predicted loss values, the heat generation rates in the different parts of the large‐scale MSTMP are calculated, then the thermal field of the prototype is analysed by the 3D finite‐element model. The maximum temperatures estimated for the rotor part and stator part are located at the rotor sleeve and the winding end of BLDCM, which are 68.5 and 55.2 °C, respectively. The loss calculation and thermal field prediction is validated by the temperature rise test in a prototype of large‐scale MSTMP with pumping speed of 4100 L/s, ultimate vacuum of 1.8 × 10−7 Pa, and rated speed of 21,000 r/min. The maximum error between the estimated and the measured temperature rise values is <5%.

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“…The temperature distribution in the motor significantly affects the demagnetisation of the PM, the service life, and the efficiency [14][15][16]. In particular, the motor design for robot joints requires comprehensive consideration of the thermal characteristics in order to guarantee the proper functions of numerous peripheral components, which are directly related to the safety of human coworkers.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic and thermal analyses of surface‐mounted permanent magnet motor with flux‐absorbing structure for enhancing overhang effect

Lee

Kim

Jung

et al. 2020

IET Electric Power Applications

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Robot joint drive motors require high‐torque and power densities due to their limited space. Surface mounted permanent magnet (SPM) motors are appropriate for a robot joint drive due to their advantages of ease of construction, high productivity, and high controllability. To utilise the limited space effectively, a rotor overhang structure (OS) is frequently used in SPM motors due the performance enhancement and simple fabrication. However, the OS effects do not increase linearly but converge when it becomes longer. To deal with problem, a flux‐absorbing structure (FAS), which can effectively improve the performances even in case of a quite long OS by forming an effective flux path between the OS and stator can be used. However, the FAS results in different electromagnetic and thermal characteristics. In particular, there have been few studies on the thermal characteristics of the FAS, which can change motor performance considerably. Hence, a lumped parameter thermal network (LPTN) which can effectively consider the heat sources and heat transfer characteristics influenced by the use of FAS, is proposed. The feasibility of the FAS and the usefulness of the proposed LPTN was verified experimentally. The presented analyses and results here can be utilised in various high‐torque‐density application.

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Loss Reduction Optimization for Heat Capacity Improvement in Interior Permanent Magnet Synchronous Machine

Cited by 14 publications

References 13 publications

Analysis and Verification of Traction Motor Iron Loss for Hybrid Electric Vehicles Based on Current Source Analysis Considering Inverter Switching Carrier Frequency

Analysis and Verification of Traction Motor Iron Loss for Hybrid Electric Vehicles Based on Current Source Analysis Considering Inverter Switching Carrier Frequency

Loss estimation, thermal analysis, and measurement of a large‐scale turbomolecular pump with active magnetic bearings

Electromagnetic and thermal analyses of surface‐mounted permanent magnet motor with flux‐absorbing structure for enhancing overhang effect

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