Torque-Performance Improvement for Direct Torque-Controlled PMSM Drives Based on Duty-Ratio Regulation

Nasr, Ahmed; Gu, Chunyang; Wang, Xuchen; Buticchi, Giampaolo; Bozhko, Serhiy; Gerada, Chris

doi:10.1109/tpel.2021.3093344

Cited by 49 publications

(13 citation statements)

References 35 publications

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“…The VSCs control has received major attention for many decades. The Direct power control (DPC) (Saidi et al, 2014), the Direct Torque Control (DTC) (Wang et al, 2020;Nasr et al, 2022), and the Voltage-oriented control (VOC) (Zamani et al, 2015) were investigated.…”

Section: Gsc Control In Balanced Modementioning

confidence: 99%

Flexible control of grid-connected renewable energy systems inverters under unbalanced grid faults

al.¹

2022

Int. j. adv. appl. sci.

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The sustainable energy opportunity of the future lies in the renewable energy-based distributed Power Generation systems (DPGSs). However, there are different concerns and integration issues that surround them. To increase the rate at which renewable energy can be used, this paper focuses on an integrated utility grid system. A novel strategy to control the grid side inverter is developed for a DPGS when considering an unbalanced grid. First, an analysis of the consequences of the occurrence of a fault on the grid is performed. Secondly, a control strategy is proposed to ensure the operation of the DPGS connected to the grid even if the latter is unbalanced. The proposed approach consists in developing control loops for each of the three symmetrical sequences in a specific reference frame to ensure the operation of the grid-connected DPGS even during asymmetrical grid voltage fault. The found results are promising in terms of the guarantee of service continuity during faulty conditions.

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Section: Gsc Control In Balanced Modementioning

confidence: 99%

Flexible control of grid-connected renewable energy systems inverters under unbalanced grid faults

al.¹

2022

Int. j. adv. appl. sci.

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“…In this way, DTC's field weakening capabilities are enhanced. It is proposed to implement direct torque control based on space vector (DTC-SVM) to minimize flux and torque ripple in (9) . The switching signal generation is achieved by using the space vector technique.…”

Section: Introductionmentioning

confidence: 99%

“…The switching signal generation is achieved by using the space vector technique. Minimization of ripple in flux, torque, and the number of commutations using reference flux vector calculator, PI controller, and space vector modulation in the place of error in torque, error in flux, hysteresis controller, and switching table is explored in (9) . Space vector modulation-based direct torque control (DTC-SVM) is proposed as the control scheme which reduces the ripple for both torque and flux when it is seen from a generic DTC perspective.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Conventional (CDTC) and Torque Controller Output Manipulated Stator Flux Angle Based Direct Torque Control (TCSF-DTC) of Permanent Magnet Synchronous Motor (PMSM)

Lemma¹,

Pradabane²

2022

IJST

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Objective: It is recommended to use DTC when a quick response time is required. However, the ripple in torque, as well as flux, is the biggest drawback of DTC. This study presents a comparative analysis of two direct torque control methods CDTC and TCSF-DTC for PMSM's that operate at a constant speed. Method: Matlab 2021b is used to model both CDTC and TCSF-DTC including all switching signals generation. During the simulation, the switching state is chosen to achieve a fast torque and flux response. Finding: A comparison of the two methods was made based on the results of the simulation. In comparison to CDTC, TCSF-DTC uses double-tracking control to manipulate flux values, which minimizes flux ripples. Although the torque performance is similar in both cases, TCSF-DTC has better flux ripple minimization. In both cases, the torque ripple is 2.857%, whereas the flux ripple is 1.879% and 0.1% for CDTC and TCSF-DTC respectively Furthermore, the simulation result for the supply voltage of the motor illustrates improvements in the harmonic distortion and fundamental component magnitudes. Novelty: Flux and torque are controlled independently in DTC, but a PI controller is added for TCSF-DTC. This study compares the performance of CDTC and TCSF-DTC for flux and torque ripple at a constant speed to recommend the control scheme that is suitable for fine torque and flux ripple control. It has been raised in several works that DTC ripples can be reduced, and researchers have recommended several DTC algorithms, including model-predictive DTC, space vector pulse width modulated DTC, and duty ratio optimization. As a result of adding this feature, computational complexity increases. In particular, duty ratio optimization increases computation complexity for slope estimation. The main advantage of this scheme is that it does not increase the complexity of signal processing but it is effective in minimizing flux ripple.

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“…In the meantime, DTC technique is also broadly used in IPM drives as an alternative control strategy and can be divided into two groups as hysteresis-based DTC (HB-DTC) (Shao et al, 2021;Nasr et al, 2022) and pulse width modulation (PWM)-based DTC techniques (X. Wang et al, 2019)..…”

Section: Introductionmentioning

confidence: 99%

Investigations of hysteresis based direct torque controlled and field oriented controlled IPM drives for electric vehicle applications

Özçiflikçi

Koç

2022

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Direct Torque Control (DTC) techniques are widely used in the control of AC machines as an opponent of space vector pulse width modulation (SVPWM) based field-oriented control (FOC). In the literature, hysteresis-based DTC (HB-DTC) is a vast majority of DTC techniques as the technique do not require a position resolver or an encoder. In this study, HB-DTC and FOC techniques are compared in detail by paying particular attention to current distortions, torque ripple and computational burden. In both techniques, the results have been obtained by simulating a 4.1 kW interior mounted permanent magnet synchronous (IPM) motor which has been designed and manufactured for research and development for electric vehicle traction applications. The results validate that although the HBDTC drives, have pros such as having less computational burden on the processor and eliminating the need for a position sensor, they have relatively much current distortions and torque ripple and hence the results are much deteriorated. Since the modern processors can easily deal with higher computational burden and field-oriented control is feasible in real time, it has been validated by extensive simulations that FOC based IPM drives are superior to their HB-DTC counterparts.

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Torque-Performance Improvement for Direct Torque-Controlled PMSM Drives Based on Duty-Ratio Regulation

Cited by 49 publications

References 35 publications

Flexible control of grid-connected renewable energy systems inverters under unbalanced grid faults

Flexible control of grid-connected renewable energy systems inverters under unbalanced grid faults

Comparative Analysis of Conventional (CDTC) and Torque Controller Output Manipulated Stator Flux Angle Based Direct Torque Control (TCSF-DTC) of Permanent Magnet Synchronous Motor (PMSM)

Investigations of hysteresis based direct torque controlled and field oriented controlled IPM drives for electric vehicle applications

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