Contribution of Current Harmonics to Average Torque and Torque Ripple in Switched Reluctance Machines

Zhu, Z. Q.; Lee, Beomseok; Huang, Li-Ren; Chu, W. Q.

doi:10.1109/tmag.2016.2633477

Cited by 55 publications

(27 citation statements)

References 12 publications

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“…In [22], it is proved that the average torque of SRMs can be calculated from its phase inductance and current regardless of the influence of saturation, i.e.…”

Section: Nd Harmonic Current Injection Methodsmentioning

confidence: 99%

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Torque Density Enhancement of 6/4 Variable Flux Reluctance Machine With Second-Harmonic Current Injection

Feng

Huang

Zhu

et al. 2019

IEEE Trans. Energy Convers.

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Article:Feng, J., Huang, L., Zhu, Z.Q. orcid.org/0000-0001-7175-3307 et al. (2 more authors) (2019) Torque density enhancement of 6/4 variable flux reluctance machine with 2nd harmonic current injection. IEEE Transactions on Energy Conversion, 34 (2). pp.Abstract-Variable flux reluctance machines (VFRMs) are developed as magnetless electrical machines. To extend the application of VFRMs, the enhancement of torque density is a key during machine design. In this paper, a novel 2 nd harmonic current injection method is developed for torque density enhancement for 6-stator-slot/4-rotor-tooth (6/4) VFRM. By using the analytical method, the optimal current profile with injected 2 nd harmonic current is obtained. The average torque of 6/4 VFRM is improved by 20% with the proposed method under all load conditions. Moreover, the proposed current profile has fixed harmonic proportions and is easily applicable to machines with different specifications. All the conclusions are confirmed by both finite element analyses and experimental results.Index Terms-Harmonic current injection method, reluctance machine, torque density. J.H. Feng (S'06) received his B.S. and M.S.

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“…In [22], it is proved that the average torque of SRMs can be calculated from its phase inductance and current regardless of the influence of saturation, i.e.…”

Section: Nd Harmonic Current Injection Methodsmentioning

confidence: 99%

“…According to [9] and [22], the inductance of 6/4 VFRM contains negligible mutual inductance between phases. Therefore, the inductance of all the phases can be expressed as…”

Section: Nd Harmonic Current Injection Methodsmentioning

confidence: 99%

Torque Density Enhancement of 6/4 Variable Flux Reluctance Machine With Second-Harmonic Current Injection

Feng

Huang

Zhu

et al. 2019

IEEE Trans. Energy Convers.

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“…To improve the control performance, more detailed analysis of torque ripple needs to be studied. Zhu et al [14] investigated the contribution of current harmonics to average torque and torque ripple in switched reluctance machines. Chen [15] proposed an electromagnetic torque model for PMSM and analyzed the influence of current and back-EMF harmonics on torque.…”

Section: Introductionmentioning

confidence: 99%

Harmonic Analysis on Torque Ripple of Brushless DC Motor Based on Advanced Commutation Control

Sun³

2018

Journal of Control Science and Engineering

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This paper investigates the relationship between current, back electromotive force (back-EMF), and torque for permanent-magnet brushless DC (PM BLDC) motors under advanced commutation control from the perspective of harmonics. Considering that the phase current is the influencing factor of both torque and torque ripple, this paper firstly analyzes the effects of advanced commutation on phase current and current harmonics. And then, based on the harmonics of the phase current and back-EMF, the torque harmonic expressions are deduced. The expressions reveal the relationship of harmonic order between the torque, phase current, and back-EMF and highlight the different contribution of individual torque harmonic to the total torque ripple. Finally, the proposed harmonic analysis method is verified by the experiments with different speed and load conditions.

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“…The necessity of EDs mainly depends on the accessible mains and load characteristics for the particular application [1]. For such application, the study of Switched Reluctance Motor Drives (SRMDs) has done a more interest [2,3]. SRMDs are used in household applications, hybrid and electric vehicles, wind power plant, aeronautical and aircraft applications, etc., The advantages of SRMDs are simple structure, less cost for manufacturing and reliability capability, high degree of self determination between phases, short end-turn, low inertia and operate in hard environment [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Regulating the advanced firing angles as a function of the appropriate motor speed [13]. The most difficult thing to control in SRMDs it has highly non linear and dynamical behavior [14]. In this work, the control scheme of ANFACO is used for controlling the speed of SRM with torque ripple minimization.…”

Section: Introductionmentioning

confidence: 99%

Torque Ripple Minimization in Switch Reluctance Motor Drives: an ANFACO Based Control

Chaple¹,

Bodkhe²,

Daigavane³

2018

IJIES

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Abstract:In this paper, the torque ripples in the switched reluctance motor (SRM) is constrained by utilizing an Ant Colony Optimization and an Adaptive Neuro Fuzzy Inference System (ANFACO). The control scheme is utilized for the simultaneous control of the speed and current of the SRM which fuses two controlling loops of PI controller. The external loop is governed for speed control and the internal loops is governed for current control despite the ideal decision of the turn on and turn off switching angles. With respect to, for instance, speed, current, inductance and torque, the dynamic behavior of the SRM is examined to control the speed and current which restrict the torque ripple. The gain parameters of the PI controller are ideally made as the dataset by the ant colony optimization (ACO) algorithm. The created dataset is passed to the adaptive neuro fuzzy inference system (ANFIS) for the error prediction. By then, the proposed framework is executed in the MATLAB/Simulink working stage. The execution of the proposed method is affirmed by differentiating and the current systems like ant lion optimization (ALO), non dominating sorting search algorithm (NSGA-II) and combined moth flame optimization and genetic algorithm with recurrent neural network (CMFG-RNN) procedures.

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Contribution of Current Harmonics to Average Torque and Torque Ripple in Switched Reluctance Machines

Cited by 55 publications

References 12 publications

Torque Density Enhancement of 6/4 Variable Flux Reluctance Machine With Second-Harmonic Current Injection

Torque Density Enhancement of 6/4 Variable Flux Reluctance Machine With Second-Harmonic Current Injection

Harmonic Analysis on Torque Ripple of Brushless DC Motor Based on Advanced Commutation Control

Torque Ripple Minimization in Switch Reluctance Motor Drives: an ANFACO Based Control

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