Magnetic circuit model for the mutually coupled switched-reluctance machine

Kokernak, J.M.; Torrey, D.A.

doi:10.1109/20.825824

Cited by 164 publications

(54 citation statements)

References 8 publications

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“…However, due to the heavy calculations involved most of the calculation procedures are abstract and highly ineffective. References [7][8][9][10] use flux tube analysis for the computation of the electromagnetic characteristics, however the approaches used for this are limited to the flux tube in the airgap [7], the mutually coupled analytical model using permeance value in the airgap [8], analysis of the magnetic circuit to derive the electrical equivalent form for analysis [9], and the analytical flux linkage model [10]. The approach in [7] is to compute the flux linkages as the stator and the rotor poles partially align, followed by computation of the flux linkage; the work does not use flux tube analysis, but rather it uses the computation of reluctance in the airgap.…”

Section: Introductionmentioning

confidence: 99%

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Computation of Electromagnetic Torque in a Double Rotor Switched Reluctance Motor Using Flux Tube Methods

et al. 2012

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With their highly robust nature and simple design, switched reluctance machines are finding their way into numerous modern day applications. However, they produce oscillatory torque that generates torque ripple and mechanical vibrations. A double rotor structure to maximize the flux linkage and thereby increase the torque generating capability is proposed. As the machine operates close to saturation, the torque computation depends heavily on the energy conversion as the rotor rolls over the stator for a fixed pole pitch. The flux linkage characteristics are highly non-linear, hence estimation of the magnetic and mechanical parameters is extremely cumbersome. Magnetic circuit analysis by interpretation of the number of flux tubes using integration techniques at different positions of the machine to develop the flux linkage characteristics of the double rotor structure is presented. Computation of the inductances during the movement of rotor from unaligned to aligned is crucial in determining the generated torque. Relevant equations of calculations for inductance and flux linkages in the aligned, partially aligned and unaligned positions are computed. The partially aligned computation is based on the average on two intermediate positions, namely the 1/4th aligned and 3/4th aligned conditions. The static torque characteristics based on the energy conversion principles are used to compute the torque value. Results from simulation and experiments used for performance evaluation of the proposed flux tube analysis for computation of the electro-magnetic torque are presented. OPEN ACCESSEnergies 2012, 5 4009

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Section: Introductionmentioning

confidence: 99%

“…The analytical model proposed in this model is only valid for partially aligned positions. In [8] the mutually coupled analytical model is derived based on the flux tube in the airgap permeance analysis. The unaligned and aligned technique flux tubes are computed.…”

Section: Introductionmentioning

confidence: 99%

Computation of Electromagnetic Torque in a Double Rotor Switched Reluctance Motor Using Flux Tube Methods

et al. 2012

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“…Thereby, the analytical equations describe the Similar to analytical equations describing the flux path, magnetic lumped parameter models known as magnetic equivalent circuits (MECs) can be used. In contrast to the analyticaland LUT models, MEC models are more commonly used when phase coupling [34], [35] or geometric asymmetry effects in the machine are described [36], [37]. MECbased models offer a more sophisticated machine model, with more accuracy compared to analytical models, without the computational complexity of a FEA.…”

Section: A Offline: Srm Models For System Simulationsmentioning

confidence: 99%

Technology, Research and Applications of Switched Reluctance Drives

et al. 2017

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Abstract-Electrical drives are one of the major consumers of electrical energy and their penetration in the market is still growing. Hence, for many drive applications efficient, reliable and cost effective solutions have to be found. Switched reluctance drives (SRD) offer a potential solution when focus is mainly on cost and robustness. However, to benefit from the unique advantages of this machine type a deep understanding of its strongly non-linear behavior is required. After discussing some major differences to classic rotating field machines, this paper presents a broad overview of the state of the art of SRD taking into consideration all aspects relevant to machine modeling, design and control development process. Finally, applications on the market utilizing SRDs and the focus of current research is presented. After reading this paper the reader will be able to assess if this modern drive technology could be advantagous in a given application.

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“…Here, phase-A is chosen as example, and its MMF can be obtained as F a = Ni a (6) where N is the coil turns per stator slot, and i a is the injected current of phase A.…”

Section: Lumped Parameter Magnetic Circuit Modelmentioning

confidence: 99%

“…A LPMC model of a switched reluctance machine was presented in [2][3][4][5][6][7]. This LPMC model construction is simple because there is no PM in switched reluctance machine.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Halbach Magnetized Permanent-Magnets Machine by Using Lumped Parameter Magnetic Circuit Method

Shao¹,

Zhao²,

Ji³

et al. 2015

PIER M

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Abstract-Permanent-magnets (PMs) with tangential and parallel magnetization directions are combined in the Halbach PM (HPM) machine, which can offer high performances. However, the existing lumped parameter magnetic circuit (LPMC) model can only calculate one PM magnetization direction, namely either tangential direction or parallel direction. The key of this paper is to propose a method to divide and establish equivalent magnetic motive force (MMF) for HPM machine with both tangential and parallel magnetizations. Then, a LPMC model, using equivalent MMF, is developed to predict the electromagnetic performances for a four-phase HPM machine. In order to verify the effectiveness of the proposed LPMC model, a 6-pole/8-slot 15 kW HPM prototype is built. The comparative results of the proposed LPMC model, two-dimensional (2D) FEM and the experiments verify the effectiveness of the proposed LPMC model.

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Magnetic circuit model for the mutually coupled switched-reluctance machine

Cited by 164 publications

References 8 publications

Computation of Electromagnetic Torque in a Double Rotor Switched Reluctance Motor Using Flux Tube Methods

Computation of Electromagnetic Torque in a Double Rotor Switched Reluctance Motor Using Flux Tube Methods

Technology, Research and Applications of Switched Reluctance Drives

Modeling and Analysis of Halbach Magnetized Permanent-Magnets Machine by Using Lumped Parameter Magnetic Circuit Method

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