Aanalytical calculation of rotor losses in high-speed permanent magnet synchronous motor at different load conditions

Cho, Han-Wook; Sung, Ho-Kyung; Choi, Jang-Young; You, Dae-Joon; Park, Jihoon; Jang, Seok–Myeong; Lee, Sungho

doi:10.1063/1.2839622

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…In order to generate sinusoidal air-gap magnetic field waveform, improve the torque and radial suspension force density, a novel BPMSM with Halbach magnetized rotor is proposed in this paper. The suspension operation mechanism is analysed in detail [42]- [45]. The mathematical models of the radial suspension force are introduced.…”

Section: Magnetic Bearings (Mbs) Are a New Type Of High Performancementioning

confidence: 99%

Electromagnetic Performance Analysis on the Bearingless Permanent Magnet Synchronous Motor With Halbach Magnetized Rotor

Zhang

et al. 2019

IEEE Access

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In order to approximately obtain sinusoidal air-gap magnetic field and get larger radial levitation force of the bearingless permanent magnet synchronous motor (BPMSM), a novel BPMSM with Halbach magnetized rotor is proposed. Firstly, the suspension and rotation mechanisms of the BPMSM are introduced. The control mechanism of producing the radial levitation force in single direction and arbitrary direction is analyzed in detail. The mathematical models of the radial suspension force are given. Secondly, the comparative research on the BPMSMs with the Halbach magnetized rotor and parallel magnetized rotor is carried out. The air-gap magnetic field, back electromotive force (EMF), radial suspension force, and torque are calculated and compared. Finally, the prototype motor equipped with the Halbach magnetized rotor is constructed. Some experimental results are tested and the stable suspension operation of the proposed motor is realized.INDEX TERMS Electric machines, permanent magnet machines, AC machines, magnetic levitation, magnetic circuits.

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Section: Magnetic Bearings (Mbs) Are a New Type Of High Performancementioning

confidence: 99%

Electromagnetic Performance Analysis on the Bearingless Permanent Magnet Synchronous Motor With Halbach Magnetized Rotor

Zhang

et al. 2019

IEEE Access

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“…H L · · · · · · · · · · · · · · · · · · · · · (8) where N z is the mesh division in the axial direction (N z = 10), h k is the dimension of the mesh element α in the axial direction, and H L is the lamination thickness. The same calculation applies for the tangential component B t,β , but the axial component B z,β is supposed negligible and is not considered in the hysteresis loss calculation for matter of consistency with the 2D nature of the Steinmetz equations.…”

Section: Calculation Of the Hysteresis Lossesmentioning

confidence: 99%

“…E-mail: ngmthao @toyota-ti.ac.jp * Toyota Technological Institute 2-12-1, Hisakata, Tenpaku-ku, Nagoya, Aichi 468-8511, Japan IPMSM, it has been found that the iron loss increase caused by PWM primarily concerns eddy current loss, with the worst impact on magnets (7) . Furthermore, an analytical model has been developed to evaluate the impact of the load on the rotor iron losses of a high-speed permanent magnet synchronous motor (PMSM) (8) ; this research showed that the load can sensibly increase the rotor iron losses. Impacts of PWM voltage modulation index on motor iron losses in only the no-load condition were shown in (9) (10) .…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Load Torque on the Iron Losses of Permanent Magnet Motors by using Finite Element Analysis

Thao

Denis

et al. 2019

IEEJ Journal IA

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The output torque of a three-phase interior permanent magnet synchronous motor (IPMSM) can be controlled within its allowable range using a pulse-width modulation (PWM) DC-AC inverter. In this paper, the effect of load torque on the iron losses of an IPMSM is studied by considering three different driving conditions, namely no-current, noload, and load conditions. In order to perform a careful evaluation in the experiments, the motor is tested at various rotational speeds, namely 750 min −1 , 1500 min −1 , and 2250 min −1 ; the voltage modulation index of the PWM inverter and the load torque are also varied. The experimental results in all the test cases show that the iron losses of the motor vary when the excitation condition is varied among the no-current, no-load, and load cases. Furthermore, a three-dimensional (3D) finite element analysis (FEA) is performed for the main test case when the motor is operated at the rated speed of 750 min −1 for reference purpose. The harmonic components caused by the excitation inverter in the stator voltage, current, and magnetic flux density are found to be the main reasons for the increase in iron losses of the motor in the no-load and load conditions compared to the no-current condition; an increase in torque also causes a relatively significant increase in the iron losses.Keywords: finite element analysis, interior permanent magnet synchronous motor, iron loss, PWM inverter, effect of load torque

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Study of the effect of load torque on the iron losses of permanent magnet motors by finite element analysis

Denis

Odawara

et al. 2017

2017 11th International Symposium on Linear Drives for Industry Applications (LDIA)

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Aanalytical calculation of rotor losses in high-speed permanent magnet synchronous motor at different load conditions

Cited by 3 publications

References 3 publications

Electromagnetic Performance Analysis on the Bearingless Permanent Magnet Synchronous Motor With Halbach Magnetized Rotor

Electromagnetic Performance Analysis on the Bearingless Permanent Magnet Synchronous Motor With Halbach Magnetized Rotor

Study of the Effect of Load Torque on the Iron Losses of Permanent Magnet Motors by using Finite Element Analysis

Study of the effect of load torque on the iron losses of permanent magnet motors by finite element analysis

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