Direct torque and flux control of switched reluctance motor with enhanced torque per ampere ratio and torque ripple reduction

Reddy, Pittam Krishna; Ronanki, Deepak; Parthiban, P.

doi:10.1049/el.2018.8241

Cited by 26 publications

(9 citation statements)

References 5 publications

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“…The high torque ripple of IMs and SRMs is due to Maxwell harmonic forces and exciting forces (produced by the slot per pole interactions), the open-slot configuration causes slot ripple harmonics which increases the motor losses as well as vibrations and noise. Although, these effects can be reduced using alternative techniques such as in [132][133][134][135][136][137][138][139][140][141], however, PMSMs offer lower vibrations and noise because of low harmonic distortion in the magnetomotive forces. The torque-speed profile of PMSMs have shown a better capability in comparison with other types.…”

Section: Induction Motors (Im)smentioning

confidence: 99%

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Asef

Lapthorn

2021

IEEE Access

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A robust design in electrified powertrains substantially helps to enhance the vehicle's overall efficiency. Robustness analyses come with complexity and computational costs at the vehicle level. The use of sensitivity analysis (SA) methods in the design phase has gained popularity in recent years to improve the performance of road vehicles while optimizing the resources, reducing the costs, and shortening the development time. Designers have started to utilize the SA methods to explore: i) how the component and vehicle level design options affect the main outputs i.e. energy efficiency and energy consumption; ii) observing sub-dependent parameters, which might be influenced by the variation of the targeted controllable (i.e. magnet thickness) and uncontrollable (i.e. magnet temperature) variables, in nonlinear dynamic systems; and iii) evaluating the interactions, of both dependent, and sub-dependent controllable/uncontrollable variables, under transient conditions. Hence the aim of this study is to succinctly review recent utilization of SA methods in the design of AC electric machines (EM)s used in vehicle powertrains, to evaluate and discuss the findings presented in recent research papers while summarizing the current state of knowledge. By systematically reviewing the literature on applied SAs in electrified powertrains, we offer a bibliometric analysis of the trends of application-oriented SA studies in the last and next decades. Finally, a numericalbased case study on a third-generation TOYOTA Prius EM will be given, to verify the SA-related findings of this paper, alongside future works recommendations.INDEX TERMS Automotive engineering, AC machines, electric vehicles, robustness, sensitivity analysis, permanent magnet machines, time series analysis, statistics.

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Section: Induction Motors (Im)smentioning

confidence: 99%

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Asef

Lapthorn

2021

IEEE Access

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“…In Ref. [23], a new direct torque and flux control scheme is investigated in a switched reluctance motor for vehicular applications. So the article makes up for the vacancy of previous researches that mainly concentrate on the investigations of large scale generators.…”

Section: Magneto-motive Force Vectorsmentioning

confidence: 99%

Impact of Negative Sequence Current on Electromagnetic Torque in Nuclear Power and Large Size Turbo‐Generators

et al. 2021

IEEJ Transactions Elec Engng

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Distinguished from the former researchers, this article aims at researching the effect of the stator fundamental negative sequence current in turbo-generators on the electromagnetic torque both from theoretical analysis and finite element simulation. Firstly, based on three sequence component analysis, coordinate system transform and interaction analysis of magneto-motive force vectors, the concrete expression of direct component of the electromagnetic torque is given, and the concrete expression of second harmonic electromagnetic torque is presented by a new vectorial approach proposed in this article. Further, the impact of the stator fundamental negative sequence current on the electromagnetic torque has been discussed in details by the new approach proposed in this article. In order to prove the correctness of the analytical analysis by the new approach proposed in this article, two turbo-generators have been taken as examples, and their finite element simulation models have been built up and tested through experimental data. Moreover, the simulation result verifies the effectiveness of the analytical expression and analytic analysis proposed in this article.

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“…However, the mainly shortcoming is large torque ripple due to its pulse power supply mode and multi‐phase commutation, which restricts its application [4–6]. Recently, scholars have proposed many strategies to decrease torque ripple [7–10].…”

Section: Introductionmentioning

confidence: 99%

Minimization of torque ripple in switched reluctance motor based on MPC and TSF

Ren

Zhu

Jing

et al. 2021

IEEJ Transactions Elec Engng

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In this paper, a novel control method based on model predictive control (MPC) and torque sharing function (TSF) is addressed to minimize the torque ripple of switched reluctance motor (SRM). Firstly, an accurate SRM model is established based on flux‐linkage characteristic curves obtained from the locked rotor test, which can predict the future operation state of the SRM drive system. Secondly, an improved TSF curve is proposed, and genetic algorithm is used to optimize TSF parameters to reduce torque ripple in commutation region. Besides, the MPC is integrated into the TSF control framework to replace the traditional hysteresis controller, and establishes a new TSF‐based model predicted torque control (MPTC) method, which avoids the frequency conversion problem caused by torque or current hysteresis controller. Further, a sector division scheme is addressed to decrease the number of candidate voltage states, whereby the computation of the controller in each sampling period is effectively reduced. Finally, in order to verify the correctness of the MPTC method, it is compared with the traditional direct instantaneous torque control (DITC). Both simulations and experiments on a three‐phase 12/8 pole SRM have confirmed that MPTC scheme can not only decreases torque ripple and stator copper losses, but also has higher efficiency than DITC. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Direct torque and flux control of switched reluctance motor with enhanced torque per ampere ratio and torque ripple reduction

Cited by 26 publications

References 5 publications

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Impact of Negative Sequence Current on Electromagnetic Torque in Nuclear Power and Large Size Turbo‐Generators

Minimization of torque ripple in switched reluctance motor based on MPC and TSF

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