Model Predictive Flux Control With Cost Function-Based Field Weakening Strategy for Permanent Magnet Synchronous Motor

Zheng, Zhihao

doi:10.1109/tpel.2019.2921361

Cited by 31 publications

(13 citation statements)

References 22 publications

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“…E-commerce enterprises decide their order quantity q according to market demand. If there is no shortage of goods, then q = d. It is assumed that all participants are risk neutral, that is, there is no risk cost to pay, and the market information is complete, that is, the information such as the cost and market demand of each participant are common knowledge and understood by all parties (Zheng and Sun 2019). Suppose the unit operating cost of express delivery enterprise is k, and the unit freight rate is s. Theoretically speaking, assuming that it does not have the limitation of capacity supply, it can meet any logistics service level required by e-commerce enterprises.…”

Section: Cost Calculation Of E-commerce Logistics During Epidemic Periodmentioning

confidence: 99%

“…If there is no shortage of goods, then q = d . It is assumed that all participants are risk neutral, that is, there is no risk cost to pay, and the market information is complete, that is, the information such as the cost and market demand of each participant are common knowledge and understood by all parties (Zheng and Sun 2019 ).…”

Section: Novel Coronavirus Pneumonia Prevention and Control Cost Contmentioning

confidence: 99%

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Study on e-commerce logistics cost control methods in the context of COVID-19 prevention and control

Ding

Zhao

2021

Soft Comput

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The severe situation caused by THE COVID-19 epidemic has not only hindered the steady development of social economy, but also had a great impact on the development of e-commerce logistics. For e-commerce enterprises, logistics cost is an important factor that affects the operation effect and consumer experience. Based on this, this study proposes cost control methods for e-commerce logistics in the prevention and control of COVID-19 environment. In this study, based on the actual environment of COVID-19 prevention and control, the logistics cost algorithm during the epidemic period is designed on the basis of the analysis of the influencing factors of e-commerce logistics cost, and the cross-border logistics strategy that conforms to the background of COVID-19 prevention and control and the demand of e-commerce logistics cost control is developed to better reduce the operating cost of logistics enterprises. The e-commerce logistics cost control method proposed in this article is effective in the prevention and control of new crown pneumonia, and the overall actual cost is within the budgeted cost range. The experimental results prove that the e-commerce logistics cost control method designed in this paper can help e-commerce companies achieve good economic benefits and proves that it has higher application advantages.

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Section: Cost Calculation Of E-commerce Logistics During Epidemic Periodmentioning

confidence: 99%

Section: Novel Coronavirus Pneumonia Prevention and Control Cost Contmentioning

confidence: 99%

Study on e-commerce logistics cost control methods in the context of COVID-19 prevention and control

Ding

Zhao

2021

Soft Comput

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“…In the operation of induction motor, the excitation current and the torque current of induction motor must also satisfy both the voltage limit circle and the current limit circle. The equations of voltage limit circle and current limit circle are respectively shown in equations (7) and (8), where V smax is the maximum stator voltage of induction motor and σ = 1 −…”

Section: Mathematical Model Of Induction Machine and Vsimentioning

confidence: 99%

“…Limited by maximum stator current magnitude and maximum stator voltage, induction motors usually operates in constant torque mode below the rated speed and in constant apparent power mode above the rated speed, that is, field weakening mode [6], [7]. In constant torque mode, induction motors usually adopt the rated excitation, that is, the rotor flux amplitude keeps constant [8], [9]. In the constant apparent power mode, the limit of bus voltage must be satisfied by reducing the rotor flux amplitude [10]- [12].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Implementation of Constrained MTPA Criterion for Induction Machine Drives

Peng

2020

IEEE Access

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Maximum torque per amper (MTPA) control can realize the minimum copper loss control of induction motor, which is often applied below the rated speed. In this paper, MTPA control is firstly extended from the constant torque mode to the constant apparent power mode and the constant voltage mode, and realizes MTPA control of induction motor in the whole speed range. Firstly, this paper establishes a MTPA-based nonlinear optimization problem in the whole speed range. Then, this optimization problem is analyzed and the analytical expressions are obtained for three different modes. Finally, finite control set-model predictive current control is adopted in this paper to achieve the fast stator current tracking. In the experimental part, the proposed algorithm is compared with the classical control strategy in this paper. The experimental results show that for the light load, the proposed algorithm reduces the stator current magnitude and improves the efficiency of induction machines.

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“…Currently, the determination of weighting factor is mainly based on the trial and error, the process is more miscellaneous due to the lack of universal theoretical design method. To address this issue, many methods have been proposed in the literature, which can be divided into two categories: online adjustment [14,15] and direct elimination [16][17][18][19][20][21][22][23][24][25][26][27]. The weighting factor is online adjusted based on the principle of coefficient of variation, but the design process is complicated [14].…”

Section: Introductionmentioning

confidence: 99%

A Three-Vector-Based Model Predictive Flux Control for PMSM Drives

Yan

et al. 2021

J. Electr. Eng. Technol.

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The model predictive flux control (MPFC) strategy is an improved method for the weighting factor that is difficult to adjust in the traditional model predictive torque control (MPTC). By analyzing the relationship among torque, stator flux and load angle, the simultaneous control of torque and stator flux amplitude is converted into the control of equivalent references stator flux vector, which eliminates directly the weighting factor. However, MPFC also suffers from high torque and flux ripples if only one voltage vector is applied during each control period. In order to solve this problem, a three-vector-based model predictive flux control strategy is proposed for permanent magnet synchronous motor in this paper. Three voltage vectors are applied in one control cycle to achieve good control performance of torque and flux, and the durations of three vectors are determined based on the principle of stator flux deadbeat control. The experimental results show that, compared with the model predictive flux control strategy and the optimal duty model predictive flux control strategy, the three-vector-based model predictive flux control strategy can effectively reduce the torque and flux ripples, improve the system's steady-state performance. KeywordsCost function • Weighting factor • Torque and flux ripples • Permanent magnet synchronous motor (PMSM) • Model predictive flux control (MPFC)

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Model Predictive Flux Control With Cost Function-Based Field Weakening Strategy for Permanent Magnet Synchronous Motor

Cited by 31 publications

References 22 publications

Study on e-commerce logistics cost control methods in the context of COVID-19 prevention and control

Study on e-commerce logistics cost control methods in the context of COVID-19 prevention and control

Analysis and Implementation of Constrained MTPA Criterion for Induction Machine Drives

A Three-Vector-Based Model Predictive Flux Control for PMSM Drives

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