Investigation of a Two-Dimensional Analytical Model of the Homopolar Inductor Alternator

Yang, Jiangtao; Ye, Caiyong; Liang, Xin; Xu, Wei; Xiong, Fei; Xiang, Yu; Li, Wenhao

doi:10.1109/tasc.2018.2802480

Cited by 30 publications

(20 citation statements)

References 8 publications

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“…Unfortunately, the structure of cylindrical synchronous motor cannot be obtained according to this paper. Yang et al proposed a simplified 2-D analytical model, WSM, of HIM with the rotor tooth width p based on the spatial overlay method to reduce the time to calculate the effective magnetizing air-gap flux density of HIM [23]. This model only considers the effective magnetizing air-gap flux density relationship between the 2-D equivalent model and HIM.…”

Section: Relationship Between Homopolar Inductor Machine and Wound-field Synchronous Machinementioning

confidence: 99%

Relationship Between Homopolar Inductor Machine and Wound-Field Synchronous Machine

Yang

Xiong

et al. 2020

IEEE Trans. Ind. Electron.

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Section: Relationship Between Homopolar Inductor Machine and Wound-field Synchronous Machinementioning

confidence: 99%

Relationship Between Homopolar Inductor Machine and Wound-Field Synchronous Machine

Yang

Xiong

et al. 2020

IEEE Trans. Ind. Electron.

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“…This equation 15, taking into account (4), (9), (12), (13), and (14), is an additional equation to the set of magnetostatic problems. This equation is consistent with the linear density of the magnetic charge ϕ, which should be found to satisfy (15).…”

Section: Calculation Of Excitation Magnetic Circuit Of the Shmmentioning

confidence: 99%

“…The virtual excitation coils were added to each rotor teeth in [1] and [13] in order to represent excitation flux in a 2D model. In the axial direction, the magnetic system was evaluated using analytical equations for the lumped parameters network.…”

Section: Introductionmentioning

confidence: 99%

Traction Synchronous Homopolar Motor: Simplified Computation Technique and Experimental Validation

et al. 2020

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The synchronous homopolar motor (SHM) has been attracting the attention of researchers for many decades. Various mathematical models of SHM have been proposed to deal with its complicated magnetic circuit. Among them, there are time-consuming 3D finite element models (FEM), equivalent circuit models neglecting some significant features of the machine design, and 2D FEM models with virtual excitation winding distorting magnetic field picture. This paper proposes a novel 2D FEM of SHM and shows that since there are no sources of excitation in the cross-sections of the rotor and stator stacks, no virtual elements are required. This model uses the general solution of the Gauss's law for magnetism containing excitation flux. The model is based on a set of magnetostatic boundary value problems for various rotor positions. The set of boundary problems is completed with the excitation equivalent circuit. The losses in the armature and field windings and in the stator and rotor magnetic cores are computed in postprocessing. All these computations are carried out for a single combination of stator and rotor stack. A symmetrization algorithm is proposed to extend the obtained results to the whole SHM. A comparison of the theoretical and experimental data for a nine-phase three-section 320 kW SHM is carried out. These SHMs were used in a mining truck with a carrying capacity of 90 tons. INDEX TERMS AC machines, automotive applications, brushless motors, electric vehicles, electromagnetic modeling, mining industry, traction motor.

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“…Three kinds of models were proposed for the evaluation of the characteristics of the SHMs: the first is the 3D finite element method (FEM) [6,7]; the second is the 2D FEM [8,9], where the axial and radial fluxes are evaluated using a magnetic circuit; and the third is the 1D [6,10] lumped parameters-equivalent circuit. The 3D FEM provides the most accurate field calculation; however, the use of any method of mathematical optimization together with it is barely possible due to the very long time required by one calculation.…”

Section: Introductionmentioning

confidence: 99%

“…The 3D FEM provides the most accurate field calculation; however, the use of any method of mathematical optimization together with it is barely possible due to the very long time required by one calculation. Two-dimensional FEM models of SHMs described in [8,9] have a much shorter computation time, but they are not as accurate, due to the introduction of virtual windings into the computational area, imitating the axial excitation flux due to the substitution of the SHM with a salient-pole synchronous machine, which causes an additional error. One-dimensional-equivalent circuits provide the shortest calculation time, but they do not take into account the details of the machine geometry, and they give the largest error.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of a Traction Synchronous Homopolar Motor

et al. 2021

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Synchronous homopolar motors (SHMs) have been attracting the attention of researchers for many decades. They are used in a variety of equipment such as aircraft and train generators, welding inverters, and as traction motors. Various mathematical models of SHMs have been proposed to deal with their complicated magnetic circuit. However, mathematical techniques for optimizing SHMs have not yet been proposed. This paper discusses various aspects of the optimal design of traction SHMs, applying the one-criterion unconstrained Nelder–Mead method. The considered motor is intended for use in a mining dump truck with a carrying capacity of 90 tons. The objective function for the SHM optimization was designed to reduce/improve the following main characteristics: total motor power loss, maximum winding current, and torque ripple. One of the difficulties in optimizing SHMs is the three-dimensional structure of their magnetic core, which usually requires the use of a three-dimensional finite element model. However, in this study, an original two-dimensional finite element model of a SHM was used; it allowed the drastic reduction in the computational burden, enabling objective optimization. As a result of optimization, the total losses in the motor decreased by up to 1.16 times and the torque ripple decreased by up to 1.34 times; the maximum armature winding current in the motor mode decreased by 8%.

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Investigation of a Two-Dimensional Analytical Model of the Homopolar Inductor Alternator

Cited by 30 publications

References 8 publications

Relationship Between Homopolar Inductor Machine and Wound-Field Synchronous Machine

Relationship Between Homopolar Inductor Machine and Wound-Field Synchronous Machine

Traction Synchronous Homopolar Motor: Simplified Computation Technique and Experimental Validation

Design Optimization of a Traction Synchronous Homopolar Motor

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