Core losses and efficiency of electrical motors using new magnetic materials

Binesti, D.; Ducreux, Jean‐Pierre

doi:10.1109/20.539278

Cited by 24 publications

(9 citation statements)

References 5 publications

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“…From refs. [22,23], the iron loss of the 1J50 material consists of the eddy current loss, hysteresis loss, and excess loss, and can be calculated as:…”

Section: Rotor Losses Estimationmentioning

confidence: 99%

Loss Estimation and Thermal Analysis of a Magnetic Levitation Reaction Flywheel with PMB and AMB for Satellite Application

Tong

Liu

et al. 2022

Energies

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The magnetic levitation reaction flywheel (MLRW) is a novel actuator of spacecraft attitude control because of its significant advantages, including lack of friction and active suppression of vibration. However, in a vacuum environment, the poor heat dissipation conditions make it more sensitive to various losses and rises in temperature. Therefore, increasing temperature is the key issue for components used in space. In this study, the losses of the three kinds of heat-generating areas in the MLRW, namely, the passive magnetic bearing (PMB), the active magnetic bearing (AMB) and brushless DC motor (BLDCM), were analyzed and calculated. Based on the electromagnetic field theory, the loss model of PMB was proposed. Based on the finite element method (FEM) and Bertotti model, the loss power of the AMB and the BLDCM was obtained. The calculated loss values were brought into the FEM to calculate the temperature field distribution of the MLRW system. Then, the key factors affecting the heat dissipation of the flywheel were obtained by combining thermal network analysis with the temperature field distribution. Finally, a prototype was fabricated. The maximum estimated and experimental temperatures were 34.8 °C and 36.8 °C, respectively, both at the BLDCM stator. The maximum error was 5.4%, which validates the calculated model.

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“…From refs. [22,23], the iron loss of the 1J50 material consists of the eddy current loss, hysteresis loss, and excess loss, and can be calculated as:…”

Section: Rotor Losses Estimationmentioning

confidence: 99%

Loss Estimation and Thermal Analysis of a Magnetic Levitation Reaction Flywheel with PMB and AMB for Satellite Application

Tong

Liu

et al. 2022

Energies

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“…The excess loss density of the stator core in the BLDCM, per electrical cycle can be obtained by [29]

p_{s_ex} = \frac{1}{f_{s} ρ_{s}} \sqrt{σ_{s} k_{s_ex}} \frac{1}{T_{s}} \int_{o}^{T_{s}} {(||, \frac{normald B}{normald t})}^{1.5} normald t

where σ s , ρ s , T , and B are the conductivity, density, electrical cycle, and flux density of the lamination material, respectively. Excess loss constant k s_ ex can be determined from the curve fitting of the measured loss data at several frequencies.…”

Section: Loss Estimation For the Bldcmmentioning

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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“…where K h , K c , and K e are the coefficients of hysteresis loss, classical eddy current loss, and excess eddy current loss, respectively, B max and f are the maximum and the frequency of magnetic flux density inside the material [7]. The coefficient K i has been determined using iron loss data from manufacturers or measurements.…”

Section: Stator Iron Lossmentioning

confidence: 99%

Iron Loss of 50 W, 100000 rpm Permanent-Magnet Machine in Micro Gas Turbine

Joo

Hong

Woo

et al. 2012

2012 Sixth International Conference on Electromagnetic Field Problems and Applications

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The high speed permanent-magnet synchronous generator is an important component of micro gas turbine. One of the major problems in micro turbine generator is an increase in iron loss with increasing rotational speed. In order to minimize the iron loss, PNF-Core (20PNF1500, posco electrical steel) is used for stator core. The core has good magnetic properties in high frequency where eddy current loss extremely increase. This paper presents a no-load iron loss calculated by magnetic circuit model and core losses data. To verify the analytical loss calculation a 2-D finite element analysis and a back-to-back test have been performed.

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Core losses and efficiency of electrical motors using new magnetic materials

Cited by 24 publications

References 5 publications

Loss Estimation and Thermal Analysis of a Magnetic Levitation Reaction Flywheel with PMB and AMB for Satellite Application

Loss Estimation and Thermal Analysis of a Magnetic Levitation Reaction Flywheel with PMB and AMB for Satellite Application

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

Iron Loss of 50 W, 100000 rpm Permanent-Magnet Machine in Micro Gas Turbine

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