Duty Ratio Modulation Strategy to Minimize Torque and Flux Linkage Ripples in IPMSM DTC Systems

Yuan, Tianqing; Wang, Dazhi; Wang, Xinghua; Wang, Xingyu; Li, Yunlu; Yan, Xiaoming; Tan, Sen; Zhou, Shuai

doi:10.1109/access.2017.2732683

Cited by 14 publications

(16 citation statements)

References 16 publications

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“…As the main errors can be compensated by the applied active vector in SV-DTC [1], the two applied active vectors in NDTC can be classified as master vector (the applied active vector in SV-DTC) and slave vector (another applied active vector in NDTC).…”

Section: Design Of the Novel Switching Table Considering The Error Ramentioning

confidence: 99%

“…A permanent magnet synchronous motor (PMSM) driven by direct torque control (DTC) has a lot of merits, including high reliability and good control performance. Therefore, it has been applied in industrial application widely [1][2][3][4][5][6][7]. Field-oriented control (FOC) and direct torque control are two widely applied high-performance control strategies for the PMSM [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The errors of torque and flux in the conventional PMSM-DTC system are compensated by a single active vector comprehensively, thus, the torque error and the flux error cannot be compensated accurately [1]. In this case, the error compensational strategy used in a conventional PMSM-DTC system can be called single vector error compensational strategy (SV-DTC).…”

Section: Introductionmentioning

confidence: 99%

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Performance Improvement of Servo Control System Driven by Novel PMSM-DTC Based On Fixed Sector Division Criterion

et al. 2019

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In order to improve the performance of the servo control system driven by a permanent magnet synchronous motor (PMSM) under novel direct torque control (NDTC), which, utilizing composite active vectors, fixed sector division criterion, is proposed in this paper. The precondition of the accurate compensations of torque and flux errors is that the sector where the stator flux linkage is located can be determined accurately. Consequently, the adaptive sector division criterion is adopted in NDTC. However, the computation burden is inevitably increased with the using of the adaptive part. On the other hand, the main errors can be compensated through SV-DTC (DTC-utilizing single active vector), while another active vector applied in NDTC can only supply the auxiliary error compensation. The relationships of the two active vectors' characteristics in NDTC are analyzed in this paper based on the active factor. Furthermore, the fixed sector division criterion is proposed for NDTC (FS-NDTC), which can classify the complexity of the control system. Additionally, the switching table for the selections of the two active vectors is designed. The effectiveness of the proposed FS-NDTC is verified through the experimental results on a 100-W PMSM drive system.

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Section: Design Of the Novel Switching Table Considering The Error Ramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance Improvement of Servo Control System Driven by Novel PMSM-DTC Based On Fixed Sector Division Criterion

et al. 2019

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“…There are different methods for the calculation of duty ratio [5]. Yuan et al determine the applied time of the active vector by the active angle between flux linkage and the active voltage vector and the impact angle between flux linkage and the zero vector [6]. Mohan et al propose a duty ratio calculation method that can reduce the flux dropping phenomenon in the low speed range [7].…”

Section: Introductionmentioning

confidence: 99%

Torque Ripple Reduction of DTC Based on an Analytical Model of PMSM

Zhong¹,

You²,

Zhou³

2020

WEVJ

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Aiming at the torque ripple problem of direct torque control that is based on space vector pulse width modulation (SVPWM-DTC) caused by the spatial harmonics and magnetic saturation characteristics of permanent magnet synchronous motor (PMSM), a feedforward controller based on an analytical model of PMSM was designed. An analytical motor model taking the spatial harmonics and magnetic saturation characteristics of PMSM into account by reconstructing the numerical solution of magnetic co-energy (MCE) from finite element analysis (FEA) was proposed. Based on that, the optimal stator flux linkage that minimizes the torque ripple is calculated and then a feedforward controller is designed and added to the SVPWM-DTC framework. Simulations and experiments are carried out and the results show that the proposed feedforward controller can effectively reduce the torque ripple of SVPWM-DTC.

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“…Permanent magnet synchronous motor (PMSM) has lots of merits, including high reliability and good control performance. Additionally, it has been applied in industrial robot application widely [1][2][3][4][5][6][7]. Field-oriented control (FOC) and direct torque control (DTC) are the two widely applied high-performance control strategies for the PMSM [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement for PMSM Driven by DTC Based on Discrete Duty Ratio Determination Method

et al. 2019

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In order to improve the performance of the servo control system, which is composed ofthe permanent magnet synchronous motor (PMSM) driven by novel direct torque control based on the fixed sector division criterion (FS-DTC) utilizing the composite active vectors, a discrete duty ratio determination method (FS-DDTC) is proposed in this paper. The determination of the accurate duty ratio is the key to obtain the desired error compensational results for PMSM, which is related to the performance of the servo system directly. As the applied master vector and slave vector during each control period are the adjacent vectors, therefore, the direction of the synthetic vector is between the directions of the two applied active vectors. Additionally, the analytical relationship between the sector angle of the synthetic vector and the error rate, which can realize the determination of the discrete duty ratio value without complicated calculations is deduced first. Furthermore, the duty ratio values of the two applied active vectors in FS-DTC are obtained through the selections of the duty ratio scale in the novel discrete duty ratio determination method directly, which can simplify the calculation process of the accurate duty ratio values effectively. The effectiveness of the proposed discrete duty ratio determination method is verified through the experimental results on a 100-W PMSM drive system.

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Duty Ratio Modulation Strategy to Minimize Torque and Flux Linkage Ripples in IPMSM DTC Systems

Cited by 14 publications

References 16 publications

Performance Improvement of Servo Control System Driven by Novel PMSM-DTC Based On Fixed Sector Division Criterion

Performance Improvement of Servo Control System Driven by Novel PMSM-DTC Based On Fixed Sector Division Criterion

Torque Ripple Reduction of DTC Based on an Analytical Model of PMSM

Performance Improvement for PMSM Driven by DTC Based on Discrete Duty Ratio Determination Method

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