Robust Torque Control of DC Link Voltage Fluctuation for SynRM Considering Inductances With Magnetic Saturation

Kim, Seungjoo; Im, Jong-Bin; Go, Sung Chul; Bae, Jae-Nam; Kim, Won‐Ho; Kim, Kwangsoo; Kim, Cherl-Jin; Lee, Ju

doi:10.1109/tmag.2010.2041907

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…Torque in Equation 6is a function of absolute (apparent) inductances. However, the inductances of the HF model (7) and (8) are incremental inductances [34], i.e., inductances estimated by means of HF signal injection will be incremental. It is needed therefore the establish the relationship between absolute and incremental inductances.…”

Section: Hf Model Of the Synchronous Machinementioning

confidence: 99%

“…The HF model in the synchronous reference frame (7) can be written as function of the mean ΣL (20) and differential ∆L (21) inductances (19). Note that the resistive component has been neglected, as at high frequency it is significantly smaller than the inductive terms and the p operator in (7) has been replaced by jω HF . Furthermore, rotor speed dependent terms in (7) have been neglected assumed that the HF voltage signal has a frequency much higher than the fundamental rotating frequency (i.e.,…”

Section: Pulsating Voltage Injectionmentioning

confidence: 99%

“…However, the high and often unpredictable price of rare-earth materials and the risk of demagnetisation due to excessive operating currents/temperatures are a concern for this type of machines. Synchronous Reluctance Machines (SynRM) have gained popularity over the last years as a viable alternative thanks to their lower cost and high tolerance to overcurrents and/or overheating and overall increased robustness, resulting from the absence of magnets in the rotor [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative Analysis of High Frequency Signal Injection Based Torque Estimation Methods for SPMSM, IPMSM and SynRM

Martinez¹,

Reigosa²,

Fernández³

et al. 2020

Energies

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Torque estimation in permanent magnet synchronous machines and synchronous reluctance machines is required in many applications. Torque produced by a permanent magnet synchronous machine depends on the permanent magnets’ flux and d q -axes inductances, whereas torque in synchronous reluctance machines depends on the d q -axes inductances. Consequently, precise knowledge of these parameters is required for proper torque estimation. The use of high frequency signal both for permanent magnets’ flux and d q -axes inductances estimation has been recently shown to be a viable option. This paper reviews the physical principles, implementation and performance of high-frequency signal injection based torque estimation for permanent magnet synchronous machines and synchronous reluctance machines.

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Section: Hf Model Of the Synchronous Machinementioning

confidence: 99%

Section: Pulsating Voltage Injectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Analysis of High Frequency Signal Injection Based Torque Estimation Methods for SPMSM, IPMSM and SynRM

Martinez¹,

Reigosa²,

Fernández³

et al. 2020

Energies

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“…Considering that the inductance variations could be >20%, it would have been useful, if rotor position estimation for larger variations in inductances had also been discussed in [25]. Kim et al [26] presented the robust operation of a SynRM with a variable dc-link voltage considering inductance values at saturation. This paper also focuses on the reduction of torque ripple to maintain noiseless operation.…”

Section: Introductionmentioning

confidence: 99%

“…This paper also focuses on the reduction of torque ripple to maintain noiseless operation. Observing the work done in [22][23][24][25][26], the authors felt that it will be very useful to address the effect of changes in the inductance values on the voltage dip margin of a SynRM connected to a weak grid.…”

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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An improved DC link voltage control with double frequency second‐order generalized integrator for enhanced power quality of grid‐interfaced DFIG system

Hamid

Hussain

Iqbal

et al. 2023

Circuit Theory & Apps

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SummaryIn this study, an optimal double frequency second order generalized integrator (DFSOGI) based grid side converter control (GSC) is used for monitoring active power injection from the DFIG wind energy system as well as improving power quality at utility grid terminals. The reference DC voltage is adapted to variations in voltage at the point of common coupling (PCC) that reduces the burden on the converter switches and switching losses. In addition, an intelligent control technique based on white shark optimization algorithm (WSO) is endorsed, where an objective problem is formulated to obtain the desired parameters of the controller. Finally, time‐domain simulations are conducted in MATLAB environment that demonstrate the validity of the implemented control over various operating conditions. To affirm the adequacy of the proposed control strategy, the response of DC link voltage obtained through optimal tuning is compared to the conventional one. The proposed WSO tuning outperforms traditional manual tuning pertaining to enhancing the overall performance of the DFIG system. The designed WSO gains exhibit better steady‐state and transient performance including settling time, steady‐state error, and peak of over amplitude and harmonic distortion. The grid currents' total harmonic distortion (THD) is within 5% that meets specified IEEE‐519 standard.

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Robust Torque Control of DC Link Voltage Fluctuation for SynRM Considering Inductances With Magnetic Saturation

Cited by 9 publications

References 6 publications

Comparative Analysis of High Frequency Signal Injection Based Torque Estimation Methods for SPMSM, IPMSM and SynRM

Comparative Analysis of High Frequency Signal Injection Based Torque Estimation Methods for SPMSM, IPMSM and SynRM

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

An improved DC link voltage control with double frequency second‐order generalized integrator for enhanced power quality of grid‐interfaced DFIG system

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