Simplified Model Predictive Control for Dual Inverter-Fed Open-Winding Permanent Magnet Synchronous Motor

Sun, Chong; Sun, Dongchu; Zheng, Zhihao; Nian, Heng

doi:10.1109/tec.2018.2841012

Cited by 59 publications

(22 citation statements)

References 26 publications

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“…3. There are 64 switching states combinations of S a 1 S a 2 ‐ S b 1 S b 1 ‐ S c 1 S c 2 and 19 different VVs are generated by the dual‐inverter system [3]. In conventional MPC strategy, the cost function in (5) needs to be evaluated with all 19 VVs to select the optimal VV that minimises the cost function and the switching states of the optimal VV need to be decided afterwards.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…Introduction: Open-winding (OW) topology has been widely investigated in recent years due to the outstanding features of fault tolerant capability and multilevel effect [1]. Model predictive control (MPC) is considered as an effective control strategy with intuitive features and manageable constraints for OW permanent magnet synchronous motor (OW-PMSM) drives [2,3]. In OW-PMSM system, the voltage vectors (VVs) are abundant and the selection of optimal VV in MPC is timeconsuming since the cost function needs to be evaluated with all candidate VVs.…”

mentioning

confidence: 99%

“…where θ r is the rotor angle. The stator flux vector ψ s in k + 1 instant can be predicted in the stationary reference frame with the Euler method as [3]:…”

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confidence: 99%

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Model predictive control with a novel cost function evaluation scheme for OW‐PMSM drives

2020

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In open-winding permanent magnet synchronous motor (OW-PMSM) system, the voltage vectors (VVs) produced by the dual-inverter are abundant and one VV may correspond to different switching states. It is time-consuming for model predictive control strategy to evaluate the cost function with all VVs and select the optimal switching states. A novel cost function evaluation scheme is proposed in this Letter and the evaluation times of the cost function is significantly reduced. The optimal switching states of each phase are decided by evaluating the cost function with six virtual vectors and a zero vector and the switching states of each phase are directly decided without additional evaluation process. The calculation time is significantly reduced with the proposed strategy and the steady-state performance of the OW-PMSM system is maintained similar to the conventional strategy. Experimental results have validated the effectiveness of the proposed strategy.

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Section: Theoretical Analysismentioning

confidence: 99%

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confidence: 99%

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Model predictive control with a novel cost function evaluation scheme for OW‐PMSM drives

2020

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“…In Ravi et al, 34 the highly computational burden multi‐objective ranking algorithm has been used for reducing the switching frequency objective. In References 35–37, the torque and flux magnitudes of the motor drive are controlled through an equivalent flux space vector so that the CF involves the same nature of flux components. Nevertheless, the reference flux space vectors calculation is more parameter dependent and requires accurate stator flux space vector position.…”

Section: Introductionmentioning

confidence: 99%

Effective predictive torque control scheme for four‐level open‐end winding permanent magnet synchronous motor drive

Eshwar

Kumar

2020

Int Trans Electr Energ Syst

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The predictive torque control (PTC) scheme for four-level open-end winding permanent magnet synchronous motor drive (OEW-PMSM) is introduced in this article, owing to its simple and intuitive algorithm. However, the classical PTC-PMSM drive performance mainly depends on the weighting factors (WF) used in cost function (CF) and its selection is a cumbersome process. Hence, a new approach for eliminating these WFs is proposed for four-level PTC-OEW-PMSM drive without dropping its benefits in classical PTC method. The torque and flux objective errors are considered as two individual CFs and evaluated with all available voltage vectors (VVs). Then, the set of VVs corresponding to the ascending orders of CFs magnitudes is considered as separate VVs groups. The common VV present in both these VV groups represents the minimised torque error, flux error and treated as the optimal VV for the next control period. As a result, the monotonous flux WF tuning is no more required. The limited VVs strategy is also proposed for reducing the computational burden of PTC. The proposed four-level PTC method is initially tested in MATLAB/ SIMULINK and experimentally verified on PMSM drive. K E Y W O R D S four-level voltage source inverter and weighting factors, open-end winding, permanent magnet synchronous motor drive drive, predictive torque control 1 | INTRODUCTION Nowadays, studies on electric vehicles (EVs) are gaining extended attention in vehicular applications because of environmental and energy issues. 1,2 Due to the features of high power density and torque per weight ratio, good efficiency and simple structure, permanent magnet synchronous motor drive (PMSM) are popularly used in EVs. 3-5 Large electric and hybrid EV applications, like military vehicle and trucks, demand high power and which is achieved through the multi-level inverters (MLIs). The MLIs provide increased voltage levels on the output side and make better harmonic

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“…In [19], a deadbeat direct torque and flux control (DB-DTFC) method is proposed to obtain the optimal voltage vector, replacing the coordinated control of torque and flux by single-objective control, which simplifies the structure of the cost function and reduces parameter adjustment difficulty of PTC. The similar method is also applied in the control of the dual inverter-fed open-winding PMSM and induction machine (IM), converting the traditional cost function into a simple cost function and simplifying the structure of PTC [20], [21]. In the studies of the permanent magnet synchronous generator (PMSG) based wind power system, a cost function based on the torque and the reactive torque is proposed to simplify the structure of PTC algorithm [16].…”

Section: Introductionmentioning

confidence: 99%

Simplified Predictive Torque Control for Surface-Mounted PMSM Based on Equivalent Transformation and Partition Method

2020

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Predictive torque control (PTC) is one of the most widely discussed strategies for high performance permanent magnet synchronous motor (PMSM) drive system because of its fast dynamic response and good stability. However, the complex prediction and optimization process requires a large amount of computation. Until now, few studies have carried out any systematic research on the simplification of the PTC. In this paper, a stepwise simplification method for the PTC strategy is proposed. Firstly, by using the equivalent transformation, the prediction process is simplified without affecting the control performance of the PTC. On this basis, the cost function is further simplified with additional presuppositions, and the optimization process is replaced by honeycomb-structured space partitioning for optimal voltage vector searching. Therefore, the computation burden caused by the multiple calculations in traditional PTC is greatly reduced. In addition, this paper provides the implementation details of the proposed control strategy. Moreover, the comparison between the traditional PTC and two simplified PTC is carried out in the evaluation of the transient performance, steady-state errors, control characteristics, computation burden, and compatibility with additional constraints. The experimental results prove the feasibility and effectiveness of the simplified algorithms, and this is beneficial to the future application of PTC strategy in the low-cost motor drive system. Moreover, the simplified PTC algorithm can achieve higher switching frequency, thereby improving the performance of torque and stator flux in the motor drive system with the application of new generation SiC power device. INDEX TERMS PMSM, predictive torque control, computation burden, cost function.

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Simplified Model Predictive Control for Dual Inverter-Fed Open-Winding Permanent Magnet Synchronous Motor

Cited by 59 publications

References 26 publications

Model predictive control with a novel cost function evaluation scheme for OW‐PMSM drives

Model predictive control with a novel cost function evaluation scheme for OW‐PMSM drives

Effective predictive torque control scheme for four‐level open‐end winding permanent magnet synchronous motor drive

Simplified Predictive Torque Control for Surface-Mounted PMSM Based on Equivalent Transformation and Partition Method

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