Rotor Eddy Current Loss Calculation of a 2DoF Direct-Drive Induction Motor

Wu, Wei; Si, Jikai; Feng, Haichao; Zeng, Cheng; Hu, Yihua; Gan, Chun

doi:10.3390/en12061134

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…Unfortunately, as the calculations would take a long time, this method is difficult to apply in practice. For this reason, alternative approaches have been developed which, in principle, can be divided into two groups: methods based on the analytical solution of the field problem in the solid rotor presented in [14][15][16][17][18], and methods utilizing the two-dimensional numerical models formulated as time-domain or frequency-domain models used in works [7,[9][10][11][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Accounting for Slot Harmonics and Nonsinusoidal Unbalanced Voltage Supply in High-Speed Solid-Rotor Induction Motor Using Complex Multi-Harmonic Finite Element Analysis

Garbiec

Jagieła

2021

Energies

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Solid rotor induction machines are still used in high-speed systems. A two-dimensional field-circuit model based on the finite element method and the complex magnetic vector potential has been shown as a very time-effective tool in the analysis of their steady states compared to time-domain models. This continuation work presents a validated computational algorithm that enables the inclusion of the nonsinusoidal and/or asymmetrical voltage supply in the multi-harmonic field-circuit model of these machines that was presented in the previous works by the authors. The extended model accounts for both spatial harmonics due to slotting and/or winding distribution and the time-harmonics due to voltage waveform. The applicability range of the model therefore increases to cases when the machine is supplied with a nonsinusoidal three-phase system of voltages with symmetry or asymmetry that can be decomposed into three symmetrical components. Its short execution time characteristic allows for much more insightful design studies of the contribution of voltage supply- and slotting-related harmonics to the overall efficiency of the machine than is possible with the time-consuming time-domain models. The proposed computational framework has never been presented in the literature. The model is verified positively by the comprehensive time-domain model. It is especially useful in design studies on solid rotor induction motors related to the optimisation of the efficiency of induction motor-based drive systems.

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Section: Introductionmentioning

confidence: 99%

Accounting for Slot Harmonics and Nonsinusoidal Unbalanced Voltage Supply in High-Speed Solid-Rotor Induction Motor Using Complex Multi-Harmonic Finite Element Analysis

Garbiec

Jagieła

2021

Energies

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“…These losses can also be calculated analytically, which is considerably effective but difficult to implement [21]. Several analytical methods including the FEA are limited to twodimensional (2D) analysis because of the difficulty in calculating the rotor eddy current loss [22]- [24].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Novel High Speed Permanent Magnet Machine Considering Magnet Eddy Current Loss

Khan

Ahmad

et al. 2020

IEEE Access

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In high speed permanent magnet (HSPM) machines, the computation of magnet eddy current loss is essential as these losses significantly affect the temperature of the permanent magnet (PM) and electromagnetic performance and can result in irreversible demagnetization of the PM. Several techniques have been adopted to minimize the eddy current loss of the PM; however, superior performance has not been achieved yet. In this paper, the design characteristics of the HSPM machine are analyzed. The PM is covered by a titanium sleeve to retain the PM on the rotor and to further reduce the eddy current loss of the magnet. The undesirable harmonics of the airgap flux density are minimized, which reduces the eddy current loss in the solid PM and rotor. Two existing models, with and without auxiliary slots, are examined and compared with the proposed design having a titanium-based retaining sleeve. The analysis reveals that the eddy-current loss, cogging torque, and iron losses of the PM are reduced by 82%, 73%, and 44.7%, respectively, in the proposed model; however, a marginal increase is observed in the average rated torque profile and open circuit flux linkage.INDEX TERMS Auxiliary slot, eddy current losses, finite element analysis, high speed machine, iron loss, permanent magnet, sleeve, spatial harmonics.

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“…The design procedure of a brushless direct current (BLDC) RotLin motor has been elaborated but the coupling effect between the linear movement and the rotation of the motor could negatively influence its performance, as the linear part and the rotary part can be influenced by each other and the control of the motor could be difficult [5]. An induction RotLin motor was introduced in Si's paper [6] and discussed the end effect [7,8], with design details presented in these pieces of literature. The coupling effect mentioned has also not been addressed yet for the motor.…”

Section: Introductionmentioning

confidence: 99%

Design and Control of a Permanent Magnet RotLin Motor for New Foldable Photovoltaic Units

Zou

Cheng

2019

Energies

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In this study, a new permanent magnet rotary-linear (RotLin) motor is proposed for foldable photovoltaic units. Firstly, the mechanical structure, operation principles and magnetic circuits of the motor are introduced, and a design procedure elaborated the parameters calculation in the linear part and the rotary part. Finite element method (FEM) is used to analyze the magnetic field of the motor, and linear force outputs and torque outputs are obtained. Secondly, a control scheme is designed for the prototype of the motor including the position control and the speed control. The deformation on the mover and the magnetic coupling effect between the linear part and the rotational part are discussed. Finally, experimental results show that this motor can simultaneously realize a linear movement with continuous rotation. The linear poisoning accuracy can achieve 0.4 µm and the angular speed can be controlled with steady errors less than 3 rpm, proving the effectiveness of the proposed RotLin motor.

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Rotor Eddy Current Loss Calculation of a 2DoF Direct-Drive Induction Motor

Cited by 4 publications

References 15 publications

Accounting for Slot Harmonics and Nonsinusoidal Unbalanced Voltage Supply in High-Speed Solid-Rotor Induction Motor Using Complex Multi-Harmonic Finite Element Analysis

Accounting for Slot Harmonics and Nonsinusoidal Unbalanced Voltage Supply in High-Speed Solid-Rotor Induction Motor Using Complex Multi-Harmonic Finite Element Analysis

Analysis and Design of Novel High Speed Permanent Magnet Machine Considering Magnet Eddy Current Loss

Design and Control of a Permanent Magnet RotLin Motor for New Foldable Photovoltaic Units

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