Online Control of IPMSM Drives for Traction Applications Considering Machine Parameter and Inverter Nonlinearities

Hoang, Khoa Dang; Aorith, H.

doi:10.1109/tte.2015.2477469

Cited by 68 publications

(50 citation statements)

References 40 publications

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“…where ψ d,mtpa and ψ q,mtpa corresponding to i d,mtpa and i q,mtpa are obtained using (11). The Brent algorithm [29] is used for solving (10) without using derivatives.…”

Section: A Mtpamentioning

confidence: 99%

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Optimal Torque Control of Saturated Synchronous Motors: Plug-and-Play Method

Awan

Song

Saarakkala

et al. 2018

IEEE Trans. on Ind. Applicat.

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Abstract-This paper deals with the optimal state reference calculation for synchronous motors having a magnetically salient rotor. A look-up table computation method for the maximum torque-per-ampere (MTPA) locus, maximum torque-pervolt (MTPV) limit, and field-weakening operation is presented. The proposed method can be used during the start-up of a drive, after the magnetic model identification. It is computationally efficient enough to be implemented directly in the embedded processor of the drive. When combined with an identification method for the magnetic model, the proposed method enables the plug-and-play start-up of an unknown motor. Furthermore, a conventional reference calculation scheme is improved by removing the need for one two-dimensional look-up table. A 6.7-kW synchronous reluctance motor (SyRM) drive is used for experimental validation.

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“…where ψ d,mtpa and ψ q,mtpa corresponding to i d,mtpa and i q,mtpa are obtained using (11). The Brent algorithm [29] is used for solving (10) without using derivatives.…”

Section: A Mtpamentioning

confidence: 99%

“…The Brent algorithm [29] is used for solving (10) without using derivatives. The Powell dogleg algorithm [30] is used for inverting the magnetic model in (11). As shown in Fig.…”

Section: A Mtpamentioning

confidence: 99%

Optimal Torque Control of Saturated Synchronous Motors: Plug-and-Play Method

Awan

Song

Saarakkala

et al. 2018

IEEE Trans. on Ind. Applicat.

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show abstract

“…where now k 1n and γ n are the attenuation and phase both filters give to the (n − 1)ω frequency; and k 2n and β n are corresponding to the (n + 1)ω frequency. Substitution of (12) and (19) into (18), and then with the application of the inverse DQ transformation, (2) results in the following for the phase a:…”

Section: Analysis Of the Reference Generator Scheme With Two Lpfmentioning

confidence: 99%

Generation of new harmonics caused by the processing of DQ transformation in power quality compensators

González

Cárdenas

Álvarez-Salas

2018

Int Trans Electr Energ Syst

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Summary An event appearing when executing the DQ transformation to get the compensation references in power quality compensators is presented in this work, where new harmonics that had not existed initially are generated and inserted to the electric system. Although the new harmonics have low magnitude, they exist, and correct processing of control techniques should be guaranteed to avoid amplifying their magnitudes. The new harmonics are produced by the filtering act in the dq frame, since filter is not ideal. The appearance of the new harmonics occurs only if the d component is filtered to isolate the dc term in the dq reference frame. But, if both d and q signals are filtered, no new harmonics are generated. This phenomenon is studied for general unbalanced systems; detailed analyses, proofs, simulation, and experimental tests are presented to validate the existence of the generation of new harmonics.

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“…An improved feedforward control strategy is proposed to reduce the impacts from parameter variation caused by flux-weakening control in [1][2][3][4]. The reference values of d-axis and q-axis currents are given by a lookup table.…”

Section: Introductionmentioning

confidence: 99%

An Improved UDE-Based Flux-Weakening Control Strategy for IPMSM

Zhang

et al. 2019

Energies

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Interior permanent magnet synchronous motors (IPMSMs) are usually used in electric vehicle drives and in other applications. In order to enlarge the speed range of IPMSMs, the flux-weakening control method is adopted. The traditional flux-weakening control strategy degrades the control performance because of parameter mismatches caused by variation of motor parameters. An improved uncertainty and disturbance estimator (UDE)-based flux-weakening control strategy is proposed for IPMSM drives in this paper. The parameter tuning method in the UDE-based control is improved. In addition, a flux-weakening adjusting factor is put forward to reduce the torque fluctuation when the operation point switches between the constant torque region and the flux-weakening region. This factor can be adjusted online by a lookup table. Finally, the validity of proposed method is verified by the simulation and experimental results. The results show that the proposed control strategy can effectively enhance the robustness of the system in the flux-weakening region, and make the system switch more smoothly between the constant torque region and the flux-weakening region.Energies 2019, 12, 4077 2 of 17 method. The influence of magnetic saturation and stator resistance are considered in [7], and an optimal control strategy is proposed. However, the flux observation is limited by the rotor position in this strategy. A linearized and constrained model predictive control is put forward to the flux-weakening control in [8]. However, this method involves a large amount of calculation and is extremely sensitive to parameter variation. In order to suppress the influence of parameter variation on the system, a voltage feedback control strategy is applied in the flux-weakening region. A flux-weakening current output by a proportional integral (PI) controller is added to the d-axis current reference. The input of the PI controller is the difference between the output voltage amplitude and the maximum available voltage amplitude of inverter. This method is simple, independent of motor parameters, and has good robustness, but the dynamic performance needs to be improved. The conventional voltage feedback method is improved in [9]. The difference between DC link voltage and output voltage of current controller is used to calculate the phase angle of reference current space vector by an adaptive algorithm. However, the global stability of the IPMSM system cannot be guaranteed. A single current regulator is proposed to improve the voltage utilization of the DC bus in [10]. This method eliminates the poor effect caused by the coupling of the d and q axis current, but the decrease of efficiency and stability is still not to be ignored. A line modulation-based flux-weakening control was proposed to maximize the DC bus voltage utilization in [11].The difference between the output voltage amplitude and the maximum voltage amplitude of the inverter is regarded as the judgment of whether to enter the flux-weakening region to reduce the switching fluctuation caus...

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Online Control of IPMSM Drives for Traction Applications Considering Machine Parameter and Inverter Nonlinearities

Cited by 68 publications

References 40 publications

Optimal Torque Control of Saturated Synchronous Motors: Plug-and-Play Method

Optimal Torque Control of Saturated Synchronous Motors: Plug-and-Play Method

Generation of new harmonics caused by the processing of DQ transformation in power quality compensators

An Improved UDE-Based Flux-Weakening Control Strategy for IPMSM

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