Minimization of Torque Ripple and Copper Losses in Switched Reluctance Drive

Vujičić, Vladan P.

doi:10.1109/tpel.2011.2158447

Cited by 259 publications

(117 citation statements)

References 17 publications

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“…Since different current waveforms can deliver constant torque for the same operating point, additional requirements can be considered, e.g. minimized rms current, which is similar to maximum-torque-per-ampere (MTPA) techniques for rotating field machines, or minimized flux and accordingly minimized iron losses (maximum-torque-perflux-MTPF) [97], [98].…”

Section: B Torque Controlmentioning

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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Section: B Torque Controlmentioning

confidence: 99%

Technology, Research and Applications of Switched Reluctance Drives

et al. 2017

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“…Removing some drawbacks of the conventional mechanical structure design, some advanced nonlinear control methods such as robust control strategies [9,10] have been developed to achieve a minimized torque ripple performance. The torque sharing function (TSF), as one of the most significant used methods, may present a promising solution to minimize the torque ripple in SRM drives [11][12][13][14]. In [11], a study has been done on improving TSF for negative torque compensation in high speed applications.…”

Section: Introductionmentioning

confidence: 99%

“…In [11], a study has been done on improving TSF for negative torque compensation in high speed applications. A novel family of optimal TSFs considering copper loss minimi-zation is proposed in [12]. However, working in positive torque producing region and using linear magnetic characterization may reduce the drive efficiency.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Control of Switched Reluctance Motor Drives under Variable Torque Applications

Namazi¹,

Rashidi²,

Koofigar³

et al. 2017

Journal of Electrical Engineering and Technology

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-This paper presents an adaptive control strategy for the speed control of a four-phase switched reluctance motor (SRM) in automotive applications. The main objective is to minimize the torque ripples, despite the unstructured uncertainties, time-varying parameters and external load disturbances. The bound of perturbations is not required to be known in the developing of the proposed adaptive-based control method. In order to achieve a smooth control effort, some properties are incorporated and the proposed control algorithm is constructed using the Lyapunov theorem where the closed-loop stability and robust tracking are ensured. The effectiveness of the proposed controller in rejecting high perturbed load torque with smooth control effort is verified with comparing of an adaptive sliding mode control (ASMC) and validated with experimental results.

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“…The torque pulsation mechanism and highly saturated nature of magnetic characterization lead to undesirable torque ripples, unfavorable acoustic noises, and deterioration in drive performance, especially in high-precision industrial applications. Many investigations have been undertaken and many torque control techniques have been introduced recently to suppress torque ripples [3]- [9]. Although design approaches were considered in [3] and [4] to produce constant torque and torque ripples were minimized, control techniques continue to be investigated to maintain motor torque at a desired level in conventional existing SRMs.…”

Section: Introductionmentioning

confidence: 99%

“…For example, a low power loss implies fast commutation between two adjacent current phases and may cause voltage saturation. Vujicic [9] introduced a family of TSFs by using different secondary objectives, such as power loss minimization and drive constraint consideration. However, the consideration of linear magnetic characterization and a simple torque equation may reduce drive efficiency and performance.…”

Section: Introductionmentioning

confidence: 99%

Copper Loss and Torque Ripple Minimization in Switched Reluctance Motors Considering Nonlinear and Magnetic Saturation Effects

Dowlatshahi¹,

Saghaian-Nejad²,

Ahn³

et al. 2014

Journal of Power Electronics

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The discrete torque generation mechanism and inherently nonlinear magnetic characterization of switched reluctance motors lead to unacceptable torque ripples and limit the application of these motors. In this study, a phase current profiling technique and torque sharing function are proposed in consideration of magnetic saturation effects and by minimizing power loss in the commutation area between the adjacent phases. Constant torque trajectories are considered in incoming and outgoing phase current planes based on nonlinear T-i-theta curves obtained from experimental measurements. Optimum points on constant torque trajectories are selected by improving drive efficiency and minimizing copper loss in each rotor position. A novel analytic invertible function is introduced to express phase torque based on rotor position and its corresponding phase current. The optimization problem is solved by the proposed torque function, and optimum torque sharing functions are derived. A modification method is also introduced to enhance the torque ripple-free region based on simple logic rules. Compared with conventional torque sharing functions, the resultant reference current from the proposed method has less peak and effective values and exhibits lower copper loss. Experimental and simulation results from a four-phase 4 KW 8/6 SRM validate the effectiveness of the proposed method.

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Minimization of Torque Ripple and Copper Losses in Switched Reluctance Drive

Cited by 259 publications

References 17 publications

Technology, Research and Applications of Switched Reluctance Drives

Technology, Research and Applications of Switched Reluctance Drives

Adaptive Control of Switched Reluctance Motor Drives under Variable Torque Applications

Copper Loss and Torque Ripple Minimization in Switched Reluctance Motors Considering Nonlinear and Magnetic Saturation Effects

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