Dynamic decoupling control method for PMSM drive with cross-coupling inductances

Lee, Kahyun; Park, Yong Ha

doi:10.1109/apec.2017.7930750

Cited by 15 publications

(5 citation statements)

References 11 publications

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“…The discharge is requested when the rotor speed reaches 157rad/s at around 1s, at which time the DC-bus voltage drops to 100 V rapidly and takes 4.9 s to decline below the safety voltage, being a little bit shorter than the simulation. Once the discharge is required, the d-axis current drops to -30 A quickly and track the reference current until 8.5 s. The q-axis current is almost zero at the beginning of the discharge but gradually increasing until 8.5 s due to the cross-coupling [25]- [26] effect. Then both the d-axis and q-axis current decline to zero as the energy in the motor has been almost dissipated.…”

Section: Resultsmentioning

confidence: 99%

DC-Bus Capacitor Maximum Power Discharge Strategy for EV-PMSM Drive System With Small Safe Current

Yang

Zhang

2021

IEEE Access

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To prevent the passengers from electric shock, the DC-bus capacitor voltage of the highvoltage permanent magnet synchronous machine (PMSM)-based drives in electric vehicles (EVs) is required to decline to safe voltage as quickly as possible when emergency occurs. Considering that the discharge time for small safe current limit powertrain systems will be longer than required, this paper proposed a maximum power discharge strategy to accelerate the dissipating process and meanwhile avoid the voltage surge. Firstly, the PMSM discharge model as a generator is established on the basis of analyzing the discharge course. Secondly, the feasible reference current trajectory is presented by drawing the trajectories of the voltage, current, and power constraints. Then the maximum power discharge strategy is achieved by following the extreme points in the reference trajectory. Finally, simulation and experiment are conducted on a three-phase SPMSM powertrain system to validate the proposed algorithm can effectively shorten the discharge process.INDEX TERMS Permanent magnet synchronous machine (PMSM), winding-based discharge, small safe current, maximum power.

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Section: Resultsmentioning

confidence: 99%

DC-Bus Capacitor Maximum Power Discharge Strategy for EV-PMSM Drive System With Small Safe Current

Yang

Zhang

2021

IEEE Access

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“…It should also be mentioned that nowadays also numerous publications are available in which, for example in [9], the existence of magnetic cross-coupling between the stator current components and the induced voltages caused by them is assumed. This is not taken into account in the present paper in order to avoid expansiveness, although such decoupling measures can in principle also be integrated into the analyzed methods.…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies of Decoupling Schemes in the Current Control Loop of Three-Phase Drives at Extreme Stator/Sampling Frequency Ratios

Nuß

2023

Preprint

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In this paper, the performance of different continuous-time and discrete-time models of the electrical subsystem of induction machines and permanent-magnet synchronous machines as well as methods based on them for decoupling the direct and quadrature axis components of the stator current are investigated and compared. The focus here is on inverter-fed, pulse width modulated drives when operated with a relatively large product of stator frequency and sampling time, where significant differences between the models and decoupling methods used come to light. Recommendations for a discrete-time model to be used uniformly in the future are made, as well as statements on whether feedforward or feedback decoupling structures are better suited. Simulation studies and measurement results support the statements made above.

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“…Others propose the complex vector SRF PI CC to provide better cross-coupling compensation [7,9,10]. The design of the CC has also been presented in [11,12] as a multiinput multi output controller which known by dynamic decoupling CC to improve the cross-coupling compensation. The advanced angle delay has been introduced in [13] to improve the control performance by compensating the delay in the angle due to the rotating d-q frame.…”

Section: Introductionmentioning

confidence: 99%

“…The advanced angle delay has been introduced in [13] to improve the control performance by compensating the delay in the angle due to the rotating d-q frame. However, despite the widespread usage and development of SRF PI CCs, the gains' selection are mostly based on trial and error or common methods, which set rules for the PI gains in order to achieve a targeted performance, such as poleplacement [14,15] , pole/zero cancelation [10,12,16] ,Ziegler-Nichols and Cohen-Coon methods [17,18]. These rules are based on assumption of no time delay through the current control loop.…”

Section: Introductionmentioning

confidence: 99%

Fast and Simple Tuning Rules of Synchronous Reference Frame Proportional-Integral Current Controller

et al. 2021

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Synchronous reference frame proportional-integral (PI) current controller (CC) is considered the most well-established solution for the current regulation in electrical drives. However, the gain selection of the PI CC is still regarded to be poorly reported, particularly in relation to the effect of the inevitable execution time taken by the controller and inverter. Mostly, tuning process of PI CC is done by trial and error or using simple rules based on pole zero cancelation and pole placement methods which ignore time delays through the controller and inverter. Hence, PI CC delivers significantly different performance compared to the expected one during the digital implementation, especially if high bandwidth or low ratio between the switching and operational frequency are required. Therefore, this paper firstly addresses and analyses the common tuning rules of PI CC which ignore the existence of time delays followed by a rigorous analysis for PI CCs' robustness to the influence of computational and modulation delays. Based on this analysis, generic recommendations have been proposed to select the PI CCs' gains as a function of the electrical drive switching frequency considering the delay effect. A set of simple, generic, and fast tuning rules were derived that guarantee fast dynamic performance with reasonable stability margins. Moreover, the effects of model uncertainties on these developed rules have been analyzed and reported. Comprehensive experimental results are provided to prove the key analytical results of this study and to validate the proposed design recommendations.

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Dynamic decoupling control method for PMSM drive with cross-coupling inductances

Cited by 15 publications

References 11 publications

DC-Bus Capacitor Maximum Power Discharge Strategy for EV-PMSM Drive System With Small Safe Current

DC-Bus Capacitor Maximum Power Discharge Strategy for EV-PMSM Drive System With Small Safe Current

Comparative Studies of Decoupling Schemes in the Current Control Loop of Three-Phase Drives at Extreme Stator/Sampling Frequency Ratios

Fast and Simple Tuning Rules of Synchronous Reference Frame Proportional-Integral Current Controller

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