Two-Vector FCS-MPC for Permanent-Magnet Synchronous Motors Based on Duty Ratio Optimization

Sheng, Long; Li, Dapeng; Ji, Yue

doi:10.1155/2018/9061979

Cited by 8 publications

(9 citation statements)

References 15 publications

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“…According to (26), in non-commutation, if U dc exceeds 4E, the current rate becomes positive, suggesting the BLDCM is functioning at a low speed. Conversely, if U dc is below 4E, the current rate of phase A turns negative, indicating a high-speed operation of the BLDCM.…”

Section: Switch Status Compensationmentioning

confidence: 99%

Torque Ripple Suppression of BLDCM With Optimal Duty Cycle and Switch State by FCS-MPC

Li,

Fan,

Kong

et al. 2024

IEEE Open J. Power Electron.

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The traditional six-step commutation control method in brushless DC motors (BLDCM) often results in significant torque ripple, which limits its application in high-precision fields. This paper proposes a scheme that combines finite control set model predictive control (FCS-MPC) to suppress commutation torque ripple. The scheme utilizes an optimal duty cycle and optimal switch compensation state. By analyzing the mathematical model of BLDC motors, the causes of commutation torque ripple were identified. To maintain the slope of the non-commutation current unchanged, a discrete model was used to predict the non-commutation current at the next moment. The predicted current was then used to calculate the optimal duty cycle. To address the shortcomings of PWM regulation performance at high speeds, a switch insertion compensation strategy was proposed. The strategy selects the optimal switch insertion compensation state based on a cost function to offset the changes in non-commutation current. Furthermore, feedback compensation was incorporated to enhance robustness in the event of parameter mismatch. The effectiveness of this method was demonstrated through experimental and simulation results. INDEX TERMS BLDCM, model predictive control, torque ripple, cost function I. INTRODUCTION

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Section: Switch Status Compensationmentioning

confidence: 99%

Torque Ripple Suppression of BLDCM With Optimal Duty Cycle and Switch State by FCS-MPC

Li,

Fan,

Kong

et al. 2024

IEEE Open J. Power Electron.

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show abstract

“…They predict their future behaviors and select an optimum switching vector by minimizing their cost functions based on their control variables [15]. The conventional MPCs apply the vector chosen for the whole control cycle, which is inadequate to regulate the torque and may result in an unsatisfactory steady-state performance [16]. The finite control set MPC (FCS-MPC) generates the switching pulses directly, and the switching frequency of the power electronic converter is variable, a significant concern in MPC.…”

Section: Introductionmentioning

confidence: 99%

“…More than one vector-based MPCs have been reported to increase the stability of the motor drives, improve the steady-state performance, and reduce the torque and current ripples [21]. Two-vector-based MPCC for PMSM drives with vector duration control was proposed in [16]. The first vector is selected in a similar way to the conventional MPC.…”

Section: Introductionmentioning

confidence: 99%

“…This method evaluates the cost function for three voltage vectors, calculates their durations, and then applies them in one control cycle. Unlike [16], this method first evaluates the cost function to obtain the optimal vector and calculate its duration. Then, it selects the second vector from a combination of two adjacent active vectors to the first vector and zero vector and applies it for the rest of the duration.…”

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confidence: 99%

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Two-vector Dimensionless Model Predictive Control of PMSM Drives Based on Fuzzy Decision Making

Farah

Lei

Zhu

et al. 2022

Trans. Electr. Mach. Syst.

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“…Currently, permanent magnet synchronous machines (PMSMs) are widespread in many electric vehicle applications (EVAs) [1,2]. Depending on the magnet placement, two categories of the PMSM are defined: surface-mounted PMSM and interior PMSM [3].…”

Section: Introductionmentioning

confidence: 99%

Novel Predictive Control for the IPMSM Fed by the 3L-SNPC Inverter for EVAs: Modified Lyapunov Function, Computational Efficiency, and Delay Compensation

Katkout

Nasser

Essadki

2020

Mathematical Problems in Engineering

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This paper proposes a novel predictive strategy based on a model predictive control (MPC) for the interior permanent magnet synchronous motors (IPMSMs) driven by a three-level simplified neutral-point clamped inverter (3L-SNPC) for electric vehicle applications (EVAs). Based on the prediction of the future behavior of the controlled variables, a predefined multiobjective cost function incorporates the control objectives which are evaluated for every sampling period to generate the optimal switching state applied directly to the inverter without the modulation stage. The control objectives in this paper are tracking current capacity, neutral-point voltage balancing, common-mode voltage control, and switching frequency reduction. The principal concepts of the novel scheme are summarized as follows: first, the delay compensation based on the long horizon of prediction is adopted by a multilevel power converter structure. Second, based on the modified Lyapunov candidate function, both stability and recursive feasibility are ensured of the proposed predictive scheme. Third, the practicability of the real-time implementation is improved by the proposed “static voltage vector” (SVV) and “single state variation” (SSV) principles. Finally, the proposed concepts are implemented in the novel predictive control formulation as additional constraints without compromising the complexity and the good performances of the predictive controller. Therefore, only the switching states that guarantee the stability and the reduction of calculation burden criteria are considered in the evaluation of cost function. The proposed predictive scheme based on the “SVV” principle has demonstrated superior performance in simulation compared with the proposed scheme with the “SSV” principle. The computational burden and switching frequency rates are reduced by 35% and 56.22%, respectively.

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Two-Vector FCS-MPC for Permanent-Magnet Synchronous Motors Based on Duty Ratio Optimization

Cited by 8 publications

References 15 publications

Torque Ripple Suppression of BLDCM With Optimal Duty Cycle and Switch State by FCS-MPC

Torque Ripple Suppression of BLDCM With Optimal Duty Cycle and Switch State by FCS-MPC

Two-vector Dimensionless Model Predictive Control of PMSM Drives Based on Fuzzy Decision Making

Novel Predictive Control for the IPMSM Fed by the 3L-SNPC Inverter for EVAs: Modified Lyapunov Function, Computational Efficiency, and Delay Compensation

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