Effects of Winding Connection on Performance of a Six-Phase Switched Reluctance Machine

Deng, Xu; Mecrow, B.C.; Martin, Richard A.; Gadoue, Shady

doi:10.1109/tec.2017.2750804

Cited by 28 publications

(19 citation statements)

References 30 publications

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“…The advantage of this modelling method is the calculation speed is fast, but the disadvantage is the influence of mutual inductance on flux-linkage and currents is neglected. Hence the arrangement of magnetic poles in this simulation model is the same as Type 2 mentioned in [15] for ensuring low mutual-inductance and good controllability of phase current. Some other parameters are shown in TABLE I.…”

Section: Simulation Analysis Of Midpoint Current In Different Womentioning

confidence: 99%

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Analysis of Midpoint Current Characteristics for Novel Six-Phase N+2 Power Converter in Different Working Condition

et al. 2020

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In this paper, a novel N+2 power converter is introduced and be applied to a six-phase switched reluctance motor (SRM) drive system. Compared with six-phase asymmetric half bridge (AHB) converter, the number of power devices required by this N+2 converter is greatly reduced, while the independence and controllability of each phase can be ensured. However, in N+2 converters, the two midpoint switches are also important components and working at much higher switching frequency than phase switches. The value of the midpoint current directly affects the heating problem of these midpoint switches then affects the reliability of the N+2 converter. Hence, different operate modes of multi-phase excitation state of N+2 converter are enumerated to obtain the relation between the midpoint current and phase currents. Then the characteristics of the midpoint current under different control parameters were obtained through MATLAB-Simulink, and the parameter optimization rules for reducing the amplitude of midpoint current are summarized. In addition, the characteristics of midpoint current in several typical fault states are also summarized. Finally, the simulation results are verified by experiments.

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Section: Simulation Analysis Of Midpoint Current In Different Womentioning

confidence: 99%

“…So far the research results of multi-phase SRMs are mainly focused on four-phase SRM drive systems [13][14]. While in recent years, researches related to five-phase and six-phase SRMs are also increasing [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Midpoint Current Characteristics for Novel Six-Phase N+2 Power Converter in Different Working Condition

et al. 2020

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“…2. Substituting (2), (4) and (5) into (1) gives (6) with sin sin sin (7) and sin sin sin (8) with mod and otherwise (9) where and are the torques produced by the self-and mutual-inductances, respectively. p is the pole-pair number, and k is a natural number.…”

Section: Srm Analytical Torque Modelmentioning

confidence: 99%

“…because the machines with higher phase numbers (m>3) can also have higher torque density and better fault-tolerant capability compared with conventional 3-phase machines [8]. Additionally, different winding configurations for multi-phase machines can be selected to achieve even better torque performance [9]- [10].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Contribution of Inductance Harmonics to Torque Production in Multiphase Doubly Salient Synchronous Reluctance Machines

Zhang

Zhu

et al. 2019

IEEE Trans. Magn.

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including the URL of the record and the reason for the withdrawal request.Abstract-This paper investigates the contribution of each order inductance harmonic to the torque (both average torque and torque ripple) of multiphase doubly salient synchronous reluctance machines (DS-SRMs). Such machines are similar to switched reluctance machines but supplied with sinewave currents. The investigations in this paper are as follows: first, a general analytical torque model based on Fourier Series analysis of inductances has been built for machines with different phase numbers, slot/pole number combinations and also winding configurations. The instantaneous torque for DS-SRMs with any given phase number can then be accurately predicted. Using such model, contribution of each order inductance harmonic to torque can be investigated separately. It is found that the torque ripple frequency of the DS-SRM only depends on phase number. For example, for a m-phase machine, there will be m×k th order torque ripple if , where m is phase number and k is a natural number. This study also explains why certain phase numbers inherently produce lower torque ripple than others. The findings in this paper provide a future direction for potential torque ripple reduction methods either from machine design or advanced control. The simulations have been validated by experiments using a 6-phase DS-SRMs.Index Terms-Doubly-salient, multiphase machine, synchronous reluctance machine, torque harmonic.

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“…The torque ripple can be 70% or more in three-phase SRMs [6,7], and 50% or more in four-phase SRMs [8,9]. The reduction of torque ripple is an active research topic and improvement strategies include machine design optimization [10][11][12] and advanced control techniques [13][14][15][16][17]. Fundamentally, the phase number of an SRM sets the number of torque pulses per electrical cycle and so directly determines the nature of the torque waveform.…”

Section: Introductionmentioning

confidence: 99%

Cost-Effective and High-Efficiency Variable-Speed Switched Reluctance Drives With Ring-Connected Winding Configuration

Deng

Mecrow

et al. 2019

IEEE Trans. Energy Convers.

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This paper presents a novel converter topology for six-phase Switched Reluctance Motor (SRM) drives, which reduces the number of switches and diodes by half, compared with the conventional asymmetric half bridge converter, but needs no additional energy storage component. A dynamic model of a six-phase SRM is developed in the MATLAB/SIMULINK environment and conventional current chopping and angle position control techniques are applied to the proposed converter, demonstrating successful operation across the full speed range with modified conventional control techniques, lower converter losses and higher system efficiency compared with the asymmetric half bridge converter. Experimental tests comparing two versions of the proposed converter with an asymmetric half bridge are described and verify the predictions of the simulations.

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Effects of Winding Connection on Performance of a Six-Phase Switched Reluctance Machine

Cited by 28 publications

References 30 publications

Analysis of Midpoint Current Characteristics for Novel Six-Phase N+2 Power Converter in Different Working Condition

Analysis of Midpoint Current Characteristics for Novel Six-Phase N+2 Power Converter in Different Working Condition

Investigation on Contribution of Inductance Harmonics to Torque Production in Multiphase Doubly Salient Synchronous Reluctance Machines

Cost-Effective and High-Efficiency Variable-Speed Switched Reluctance Drives With Ring-Connected Winding Configuration

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