Calculation of Loss and Temperature Rise of High Speed Permanent Magnet Synchronous Motor

Ji, Zhihao; Zhang, Hao

doi:10.1109/icems56177.2022.9983437

Cited by 1 publication

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the influence of the stator winding current on the rotor but not the effect of the stator slot, the stator winding current can be equated to the equivalent current sheet distributed in the stator slot. Assuming that the current sheet is uniformly distributed in the slot, the equivalent distribution of a single conductor and a single coil in polar coordinates is shown in Figure 2 [8,9,11]: According to Figure 2a, the current sheet distribution function of a single conductor can be expressed as follows:…”

Section: Analysis Of Equivalent Current Sheet Model Of Motormentioning

confidence: 99%

“…In order to essentially analyze the mechanism of the rotor eddy current loss, the two-dimensional model of the permanent magnet synchronous motor in a stator rectangular coordinate system is adopted, as shown in Figure 4. To simplify the calculation, the following assumptions were made [11][12][13][14]:…”

Section: Establishment Of Analytical Model Of Rotor Eddy Current Lossmentioning

confidence: 99%

“…The solution of the above equation can be obtained by the method of separating variables [11]: According to the electromagnetic field theory applied to the motor, the electromagnetic field equations of the air gap (8), the rotor sleeve (9), the PM motor (10), and the rotor yoke (11) are as follows, respectively:…”

Section: General Solution Of Air Gap Subdomainmentioning

confidence: 99%

“…Therefore, the circumferential eddy current effect was excluded. In this study, the end effect treatment method of the induction motor [11][12][13][14][15] was used to consider the end effect in the PM motor. Hence, the total rotor eddy current loss P Z after treatment can be expressed by the following equation:…”

Section: Analytical Calculation Of the Rotor Eddy Current Lossmentioning

confidence: 99%

See 3 more Smart Citations

Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor

Pan

Tao

et al. 2022

Machines

View full text Add to dashboard Cite

Pulse width modulation current harmonics and space harmonics are some of the major factors affecting the rotor eddy current loss of the high-speed permanent magnet motor. In this study, based on the principle of the equivalent current sheet, a two-dimensional motor model in a rectangular coordinate system was established. Considering the armature reaction, the end effect, and the current harmonics generated by variable frequency power supply, the eddy current loss of the rotor at different frequencies was analyzed and calculated using the analytical and finite element methods (FEM). When the frequency is between 200 Hz and 600 Hz, the variation trend of the rotor eddy current loss with a frequency obtained by analytical calculation and FEM analysis is roughly the same, and the error is still within a reasonable range. However, as the frequency continues to increase, the error between the two becomes larger and larger. Furthermore, based on the two-dimensional FE model, the influence of the sleeve material, the thickness, and the composite structure on the rotor eddy current loss were studied and analyzed. It was found that adding a graphene shielding layer between the permanent magnet and the sleeve can effectively shield the harmonic magnetic field, greatly reduce the eddy current loss of the permanent magnet, and effectively prevent the temperature of the permanent magnet from being too high, which is conducive to the continuous and stable operation of the high-speed permanent magnet motor.

show abstract

Section: Analysis Of Equivalent Current Sheet Model Of Motormentioning

confidence: 99%

Section: Establishment Of Analytical Model Of Rotor Eddy Current Lossmentioning

confidence: 99%