Predictive torque control of SynRM drives with online MTPA trajectory tracking and inductances estimation

Varatharajan, Anantaram; Cruz, Sérgio M. A.; Hadla, Hazem; Briz, Fernando

doi:10.1109/iemdc.2017.8002104

Cited by 20 publications

(9 citation statements)

References 16 publications

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“…Regardless of the motor and control algorithm, MTPA has decent flexibility to increase each drive system's efficiency. This method is applied to DTC [98,101,183,184], FOC [142,185,186], DFVC [187], and MPDTC [187,188] for different motors, including SynRMs.…”

Section: Up To Base Speedmentioning

confidence: 99%

A Review of Synchronous Reluctance Motor-Drive Advancements

et al. 2021

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Recent studies show that synchronous reluctance motors (SynRMs) present promising technologies. As a result, research on trending SynRMs drive systems has expanded. This work disseminates the recent developments of design, modeling, and more specifically, control of these motors. Firstly, a brief study of the dominant motor technologies compared to SynRMs is carried out. Secondly, the most prominent motor control methods are studied and classified, which can come in handy for researchers and industries to opt for a proper control method for motor drive systems. Finally, the control strategies for different speed regions of SynRM are studied and the transitions between trajectories are analyzed.

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Section: Up To Base Speedmentioning

confidence: 99%

A Review of Synchronous Reluctance Motor-Drive Advancements

et al. 2021

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“…where k 6 = k 5 i dn 2 . Assuming ΔT n and ΔT n1 as the initial and changed torque ripple due to inductance change and T navg to be the average normalised electromagnetic torque.…”

Section: Impact On Torque Ripple Due To Inductance Variations In a Synrmmentioning

confidence: 99%

“…Accurate inductance determination of synchronous motor drives is a challenging, but essential task [1–3] as this impacts its robust performance when it is connected to a weak grid where voltage dips happen frequently. This problem becomes more important for salient pole synchronous machines, where the production of torque is heavily dependent on the difference between the direct and quadrature axes inductances (

L_{d}

and

L_{q}

).…”

Section: Introductionmentioning

confidence: 99%

Impact of inductance variation on the operation of a synchronous reluctance motor connected to a weak grid

Ghosh¹,

Das²,

Bhuvaneswari³

2020

IET Electric Power Applications

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Changes in inductance profiles of motors from originally designed values are observed due to manufacturing defects and different measurement techniques adopted. This introduces changes in the magnitude of voltage dip that could be tolerated by a synchronous reluctance motor operating at a particular speed and torque while being connected to a weak grid. Since the voltage dip margin is dependent on the inductance of the motor, it changes as per the variations in inductance. This paper proposes a novel methodology to analyse the variations in the voltage dip margin as per the discrepancies in inductances when the motor drive is expected to deliver a particular speed and torque. A control strategy is also proposed to mitigate the ill‐effects of the voltage dip by changing the operating point of the motor. Mathematical expressions are derived showing the voltage dip margin for different degrees of variations in the inductances. It is observed that with reduction in the inductance value, the voltage dip margin increases with increased current, where the current still remains within the maximum current limit of the motor, while the motor is forced to deliver the same speed and torque. The proposed mathematical derivations are validated through simulations and experiments.

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“…However, when the above methods are applied to a SynRM [17,18], the torque ripple is still very high, which cannot meet industrial requirements. More recently, due to the advantages of its fast response and the ability to handle multiple variables and nonlinear constraints, model predictive torque control (MPTC) has received increasingly more attention regarding a broader range of applications in IMs [19,20], PMSMs [21,22], and SynRMs [23,24]. MPTC can predict the future torque and flux linkage in multiple control cycles based on a discrete system model.…”

Section: Introductionmentioning

confidence: 99%

A Novel Model Predictive Direct Torque Control Method for Improving Steady-State Performance of the Synchronous Reluctance Motor

et al. 2021

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Due to the particularity of the synchronous reluctance motor (SynRM) structure, a novel high-performance model predictive torque control (MPTC) method was proposed to reduce the high torque ripple and improve the performance and efficiency of the motor. First, the precise parameters of the SynRM reflecting the magnetic saturation characteristics were calculated using finite element analysis (FEA) data, and the torque and flux linkage maximum torque per ampere (MTPA) trajectory was derived by considering the saturation characteristics. Then, an MPTC model of a SynRM with duty cycle control was established, the MTPA trajectory stored in a look-up table was introduced into the control model, and the duration of the active voltage vector in one control cycle was calculated by evaluating the torque error. Finally, an experimental platform based on a SynRM prototype was built, and various performance comparison experiments were carried out for the proposed MPTC method. The experimental results show that the proposed method could reduce the torque ripple of the motor, the performance of the motor was significantly improved under various working conditions, and its correctness and effectiveness were verified.

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Predictive torque control of SynRM drives with online MTPA trajectory tracking and inductances estimation

Abstract: Keywords-Synchronous reluctance motor drives; modelpredictive control; maximum torque per ampere trajectory; parameter estimation. dq d q d

Cited by 20 publications

References 16 publications

A Review of Synchronous Reluctance Motor-Drive Advancements

A Review of Synchronous Reluctance Motor-Drive Advancements

Impact of inductance variation on the operation of a synchronous reluctance motor connected to a weak grid

A Novel Model Predictive Direct Torque Control Method for Improving Steady-State Performance of the Synchronous Reluctance Motor

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