A Novel Method for No-Load Magnetic Field Analysis of Saturated Surface Permanent-Magnet Machines Using Conformal Mapping and Magnetic Equivalent Circuits

Hanic, Ana; Žarko, Damir; Hanić, Zlatko

doi:10.1109/tec.2015.2507704

Cited by 62 publications

(34 citation statements)

References 29 publications

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“…Lin et al introduced an analytical method for universal motors based on the actual air-gap field distribution from the field solutions by the CMM [119], and presented a generalized analytical field solution for spoke type permanent magnet machines [120]. Hanic et al [95] proposed a novel method for magnetic field analysis based on the CMM and MEC. Alam et al [121,122] took the slotting effect, winding distribution, armature reaction and saturation effect into account.…”

Section: Conformal Mapping Methodsmentioning

confidence: 99%

“…Based on the advantage combinations of the analytical and numerical methods, Chao [141] proposed a hybrid method to analyze the UMF in hard disk drive spindle motors. Hanic et al [95] adapted the conformal mapping and magnetic equivalent circuits to calculate the back electromotive force and cogging torque of saturated surface-mounted permanent magnet machines. Sprangers et al [142] presented a semi-analytical method based on the harmonic modeling technique and analyzed the magneto-static field distribution in the slotted structure of rotating electrical machines.…”

Section: Comprehensive Methodsmentioning

confidence: 99%

“…Xie et al [94] studied the air-gap flux density of a dual-rotor permanent magnet motor by the MEC method and discussed the effects of winding current harmonics, winding types and radial and parallel magnetization types. Based on Kirchhoff's second law of magnetic circuit, Hanic et al [95] proposed an analysis approach for saturated surface-mounted permanent magnet motor with no-load by using the conformal mapping and MEC method. Fleming et al [96] conducted real-time simulation of switched reluctance motor by MEC.…”

Section: Magnetic Equivalent Circuitmentioning

confidence: 99%

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Review of Electromagnetic Vibration in Electrical Machines

Han

Chu

2018

Energies

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Electrical machines are important devices that convert electric energy into mechanical work and are widely used in industry and people's life. Undesired vibrations are harmful to their safe operation. Reviews from the viewpoint of fault diagnosis have been conducted, while summaries from the perspective of dynamics is rare. This review provides systematic research outlines of this field, which can help a majority of scholars grasp the ongoing progress and conduct further investigations. This review mainly generalizes publications in the past decades about the dynamics and vibration of electrical machines. First the sources of electromagnetic vibration in electrical machines are presented, which include mechanical and electromagnetic factors. Different types of air gap eccentricity are introduced and modeled. The analytical methods and numerical methods for calculating the electromagnetic force are summarized and explained in detail. The exact subdomain analysis, magnetic equivalent circuit, Maxwell stress tensor, winding function approach, conformal mapping method, virtual work principle and finite element analysis are presented. The effects of magnetic saturation, slot and pole combination and load are discussed. Then typical characteristics of electromagnetic vibration are illustrated. Finally, the experimental studies are summarized and the authors give their thoughts about the research trends.Energies 2018, 11, 1779 2 of 33 vibration mechanism can be helpful for the design of electrical machines. Therefore, the study of the electromagnetic vibration of electrical machines has practical significance.Electromagnetic vibrations are usually generated by the distorted air-gap field of an eccentric rotor in electrical machines. The uneven air-gap is directly related to the eccentricity, which is common in rotating electrical machines. Eccentricity can be caused by several reasons, such as relative misalignment of the rotor and stator in the fixing stage, misalignment of the load axis and rotor shaft, elliptical stator inner cross section, wrong placement or rubbing of ball bearings, mechanical resonance, and unbalanced loads [1,2]. Eccentricities can be further subdivided into two categories: circumferential unequal air gaps and axial unequal air gaps. The former can be grouped into static eccentricity and dynamic eccentricity. In the case of static eccentricity, the rotor rotates around its own geometric axis, which is not the geometric axis of the stator. In the case of dynamic eccentricity, the rotor is not concentric and rotates around the geometric axis of the stator. In reality, both static eccentricity and dynamic eccentricity tend to coexist. An inherent static eccentricity exists, even in newly manufactured machines, due to the build-up of tolerances during the manufacturing and assembly procedure, as has been reported in [3]. Unequal air gaps cause unbalanced magnetic forces (UMFs) [4] on the rotor, which lead to mechanical stress on some part of the shaft and bearing. After prolonged operation, these fac...

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Section: Conformal Mapping Methodsmentioning

confidence: 99%

Section: Comprehensive Methodsmentioning

confidence: 99%

Section: Magnetic Equivalent Circuitmentioning

confidence: 99%

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Review of Electromagnetic Vibration in Electrical Machines

Han

Chu

2018

Energies

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“…It has been widely used to replace the PM and calculate the electromagnetic performance in many PM machines such as IPM machine [17], transverse flux machine [18], and eccentric SPM machine [19]. For the saturated SPM machine, Hanic et al combined the conformal mapping and LPMCM to analyze the airgap field [20]- [21] by using equivalent currents. The SC mapping in [20] and [21] transforms the slotted domain with equivalent current sheets of magnets into slotless domain.…”

Section: Introduction Ermanent-magnetmentioning

confidence: 99%

“…For the saturated SPM machine, Hanic et al combined the conformal mapping and LPMCM to analyze the airgap field [20]- [21] by using equivalent currents. The SC mapping in [20] and [21] transforms the slotted domain with equivalent current sheets of magnets into slotless domain. The field distribution due to winding current and magnet equivalent currents placed at the new mapped positions is calculated by using Hague's solution.…”

Section: Introduction Ermanent-magnetmentioning

confidence: 99%

On-Load Field Prediction of Surface-Mounted PM Machines Considering Nonlinearity Based on Hybrid Field Model

Wang

et al. 2019

IEEE Trans. Magn.

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Comparison between 2‐D and 0‐D analytical models for slotless double‐sided inner armature linear permanent magnet synchronous machines

Ghaffari

Rahideh

Ghaffari

et al. 2020

Int Trans Electr Energ Syst

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Summary This article compares the 2‐D and 0‐D analytical models for the slotless double‐sided inner armature linear permanent magnet synchronous machines (SDSIALPMSMs). The sub‐domain method is implemented to achieve the 2‐D analytical model. In this method, the cross‐section of the motor is divided into eleven sub‐regions and the Maxwell equations are determined for each sub‐region. In the presented 0‐D model, a magnetic equivalent circuit (MEC) is derived to compute the maximum magnetic flux density in the air‐gap. In both approaches, the magnetic flux density is analytically calculated to predict the inductance, induced voltage, flux linkage and electromagnetic forces. Ultimately, the results of both analytical models are validated against those of the 3‐D finite‐element method (FEM) analysis. These results confirm the superiority of the 2‐D analytical model compared with that of the 0‐D in the terms of the accuracy of the magnetic flux density, induced voltage, self and mutual inductances as well as the tangential and normal electromagnetic forces. Also, less computational time of the described 2‐D analytical model is recognized as a merit compared with FEM models.

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A Novel Method for No-Load Magnetic Field Analysis of Saturated Surface Permanent-Magnet Machines Using Conformal Mapping and Magnetic Equivalent Circuits

Cited by 62 publications

References 29 publications

Review of Electromagnetic Vibration in Electrical Machines

Review of Electromagnetic Vibration in Electrical Machines

On-Load Field Prediction of Surface-Mounted PM Machines Considering Nonlinearity Based on Hybrid Field Model

Comparison between 2‐D and 0‐D analytical models for slotless double‐sided inner armature linear permanent magnet synchronous machines

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