Model-Based Spatial Harmonics Vector Compensation Method for Three-Phase Mutually Coupled Switched Reluctance Machine With Sinusoidal Current Excitation

Azer, Peter; Nalakath, Shamsuddeen; Emadi, Ali

doi:10.1109/ojpel.2020.3004853

Cited by 8 publications

(4 citation statements)

References 33 publications

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“…In [29], the total number of the FEA steps is similar to the method in [27]. However, the current is modeled by a single 3D LUT dependent on the rotor position (7). The size of this LUT is 20x10x90=18000 for a 10x10 i dq grid per quadrant and 90 steps per electrical cycle.…”

Section: E Total Size Of Look-up Tables In the Proposed Methods Compamentioning

confidence: 99%

“…MCSRMs with sinusoidal current excitation have the advantage of using the standard voltage source inverter (VSI), rather than the asymmetric half-bridge converter used in CSRMs [5], [6]. Additionally, the standard vector control with the regular modulation techniques such as sinusoidal pulse width modulation and space vector modulation can be used instead of the hysteresis current controllers [7], which contributes to the acoustic noise due to the variable switching frequency.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Vector Modeling of Three-Phase Mutually Coupled Switched Reluctance Machines with Single dq-Quadrant Look-up Tables

Azer

Nalakath

Howey

et al. 2020

IEEE Open J. Ind. Electron. Soc.

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This paper presents a dynamic modeling method for a 3-phase mutually coupled switched reluctance machine (MCSRM) considering spatial harmonics and saturation. The conventional modeling methods of MCSRMs are based on 3D look-up tables (LUTs), where the phase flux linkages are considered as state variables. These 3D LUTs describe the phase currents with respect to phase flux linkages and rotor position. The 3D LUTs represent two dq quadrants and are obtained from finite element analysis (FEA) by multi-phase excitation where the excitation currents cover two quadrants in the dq synchronous reference frame. The LUTs used in the proposed method represent the phase current and electromagnetic torque as vectors. The magnitude and the angle of these vectors are represented by the sine and cosine Fourier coefficients. Hence, rotor position is not an input to the LUTs and the proposed method uses 2D LUTs. Additionally, the flux linkages in the four dq quadrants possess symmetry for MCSRMs. Therefore, LUTs corresponding to only one dq quadrant are required. The single-quadrant based LUTs reduces the number of FEA steps and the size of the LUTs by 50% compared to the two-quadrant LUT based models. Finally, the proposed method is validated using FEA and experiments for a 12/8 MCSRM.

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Section: E Total Size Of Look-up Tables In the Proposed Methods Compamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Vector Modeling of Three-Phase Mutually Coupled Switched Reluctance Machines with Single dq-Quadrant Look-up Tables

Azer

Nalakath

Howey

et al. 2020

IEEE Open J. Ind. Electron. Soc.

Self Cite

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“…A three-phase mutually coupled SRM is proposed in refs. [9][10][11], the idea is based on multiphase excitation, the mutual coupling is added between phases, and then an SVPWM method is able to be applied.…”

Section: Introductionmentioning

confidence: 99%

A space vector pulse width modulation method for switched reluctance motor driven by full bridge power converter

Sun,

Dou,

Chen

2023

IET Electric Power Appl

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This study proposes a space vector pulse width modulation (SVPWM) driving method for the switched reluctance motor (SRM), which enables the use of a standard full‐bridge power converter to drive a three‐phase SRM with a ring structure, in place of the traditional asymmetric H‐bridge (AHB). Based on this driving topology, the SVPWM approach is employed to drive the SRM, and its performance is compared with that of the conventional SRM driving method utilising the AHB. The findings indicate that the SVPWM method can effectively reduce torque ripple in the SRM. Moreover, the experimental validation performed to verify the proposed driving topology and method yields results that closely align with the simulated outcomes.

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“…The second LUT describes the non-linear relationship between the phase current, the phase torque (T e ), and rotor position as T e = f (i ph , θ). Both LUTs are obtained by experiments or from finite element model using single-phase excitation and mutual coupling between phases is not considered [25], [26].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Evaluation of Mutual Coupling Effect in Conventional Switched Reluctance Machines Using Space Vector Representation

et al. 2022

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This paper presents a non-linear model for conventional switched reluctance machines (CSRMs) that considers the mutual coupling between phases. Although CSRMs are based on single-phase excitation, there is usually an overlapping between the excited phases. During this overlapping, the CSRM is at 2-phase excitation and the single-phase representation of motor dynamics is not accurate. Hence, a dynamic model is presented in this paper that that accounts for the the mutual coupling between phases in addition to the effects of saturation and spatial harmonics. The proposed method is based on modeling the resultant current vector due to 2-phase excitation in space. The relationship between the resultant current and flux linkage vectors is obtained at different rotor positions using finite element method (FEM). This relationship is saved as a 3D lookup table (LUT). These 3D LUTs are reduced into 2D LUTs independent of rotor position by representing the phase currents as vectors instead of instantaneous values. Similarly, the relationship between the resultant current vector and the electromagnetic torque is obtained and saved as a 3D lookup table. The proposed method is compared with a conventional model where the mutual coupling is not considered. This comparison is conducted using FEM on two different motors; the first motor is 12/8 3phase 2kW CSRM and the second motor is 24/16 3-phase 75kW CSRM. FEM results show that the mutual coupling is significant for high power motors. The proposed dynamic model is compared with experimental results using the 12/8 3-phase 2kW CSRM.INDEX TERMS Conventional switched reluctance machine (CSRM), finite element method (FEM), mutual coupling, vector modeling.

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Model-Based Spatial Harmonics Vector Compensation Method for Three-Phase Mutually Coupled Switched Reluctance Machine With Sinusoidal Current Excitation

Cited by 8 publications

References 33 publications

Dynamic Vector Modeling of Three-Phase Mutually Coupled Switched Reluctance Machines with Single dq-Quadrant Look-up Tables

Dynamic Vector Modeling of Three-Phase Mutually Coupled Switched Reluctance Machines with Single dq-Quadrant Look-up Tables

A space vector pulse width modulation method for switched reluctance motor driven by full bridge power converter

Modeling and Evaluation of Mutual Coupling Effect in Conventional Switched Reluctance Machines Using Space Vector Representation

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