Variable-Speed Control of a Six-Phase Induction Machine using Predictive-Fixed Switching Frequency Current Control Techniques

González, Osvaldo; Ayala, Magno; Rodas, Jorge; Gregor, Raúl; Rivas, Gustavo A.; Doval-Gandoy, Jesús

doi:10.1109/pedg.2018.8447837

Cited by 23 publications

(10 citation statements)

References 17 publications

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“…The modulated PCC (M-PCC) proposed for six-phase IM drives in References [102][103][104][105] integrates a modulation technique in the control algorithm to reduce the x -y current components. This strategy considers that the α-β subspace is divided into forty-eight different sectors, which are defined by adjacent voltage vectors with the same amplitude.…”

Section: Predictive Current Control Based On Pulse Width Modulation Smentioning

confidence: 99%

Finite Control Set Model Predictive Control of Six-Phase Asymmetrical Machines—An Overview

2019

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Recently, the control of multiphase electric drives has been a hot research topic due to the advantages of multiphase machines, namely the reduced phase ratings, improved fault tolerance and lesser torque harmonics. Finite control set model predictive control (FCS-MPC) is one of the most promising high performance control strategies due to its good dynamic behaviour and flexibility in the definition of control objectives. Although several FCS-MPC strategies have already been proposed for multiphase drives, a comparative study that assembles all these strategies in a single reference is still missing. Hence, this paper aims to provide an overview and a critical comparison of all available FCS-MPC techniques for electric drives based on six-phase machines, focusing mainly on predictive current control (PCC) and predictive torque control (PTC) strategies. The performance of an asymmetrical six-phase permanent magnet synchronous machine is compared side-by-side for a total of thirteen PCC and five PTC strategies, with the aid of simulation and experimental results. Finally, in order to determine the best and the worst performing control strategies, each strategy is evaluated according to distinct features, such as ease of implementation, minimization of current harmonics, tuning requirements, computational burden, among others.

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Section: Predictive Current Control Based On Pulse Width Modulation Smentioning

confidence: 99%

Finite Control Set Model Predictive Control of Six-Phase Asymmetrical Machines—An Overview

2019

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“…After using the Vector Space Decomposition (VSD) approach, the decoupling transformation T gives the α − β subspace, which is related to the flux/torque producing components and the loss-producing x − y subspace and a zero-sequence subspace. Then, by using an amplitude-invariant transformation matrix, T is defined as follows: The discrete-time model of the system in state-space representation is represented by the following equations [36]:…”

Section: Six-phase Im and Vsi Modelmentioning

confidence: 99%

“…Since the conditions in (36) are met, the existence of a convergent quasi sliding mode has been established. Consequently, the proposed DSMC with TDE method in (32) is stable.…”

Section: Inner Current Control Loopmentioning

confidence: 99%

Current Control of a Six-Phase Induction Machine Drive Based on Discrete-Time Sliding Mode with Time Delay Estimation

et al. 2019

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This paper proposes a robust nonlinear current controller that deals with the problem of the stator current control of a six-phase induction motor drive. The current control is performed by using a state-space representation of the system, explicitly considering the unmeasurable states, uncertainties and external disturbances. To estimate these latter effectively, a time delay estimation technique is used. The proposed control architecture consists of inner and outer loops. The inner current control loop is based on a robust discrete-time sliding mode controller combined with a time delay estimation method. As said before, the objective of the time delay estimation is to reconstruct the unmeasurable states and uncertainties, while the sliding mode aims is to suppress the estimation error, to ensure robustness and finite-time convergence of the stator currents to their desired references. The outer loop is based on a proportional-integral controller to control the speed. The stability of the current closed-loop system is proven by establishing sufficient conditions on the switching gains. Experimental work has been conducted to verify the performance and the effectiveness of the proposed robust control scheme for a six-phase induction motor drive. The results obtained have shown that the proposed method allows good performances in terms of current tracking, in their corresponding planes.

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“…However, the proposed strategy only select the twelve largest vectors including the null vector in order to represent the optimal vector. This current control approach has been adopted in order to reduce the (x-y) currents [24,25].…”

Section: Proposed Current Controller (Pfsccs)mentioning

confidence: 99%

Predictive-Fixed Switching Current Control Strategy Applied to Six-Phase Induction Machine

et al. 2019

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In applications such as multiphase motor drives, classical predictive control strategies are characterized by a variable switching frequency which adds high harmonic content and ripple in the stator currents. This paper proposes a model predictive current control adding a modulation stage based on a switching pattern with the aim of generating a fixed switching frequency. Hence, the proposed controller takes into account the prediction of the two adjacent active vectors and null vector in the ( α - β ) frame defined by space vector modulation in order to reduce the (x-y) currents according to a defined cost function at each sampling period. Both simulation and experimental tests for a six-phase induction motor drive are provided and compared to the classical predictive control to validate the feasibility of the proposed control strategy.

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Variable-Speed Control of a Six-Phase Induction Machine using Predictive-Fixed Switching Frequency Current Control Techniques

Cited by 23 publications

References 17 publications

Finite Control Set Model Predictive Control of Six-Phase Asymmetrical Machines—An Overview

Finite Control Set Model Predictive Control of Six-Phase Asymmetrical Machines—An Overview

Current Control of a Six-Phase Induction Machine Drive Based on Discrete-Time Sliding Mode with Time Delay Estimation

Predictive-Fixed Switching Current Control Strategy Applied to Six-Phase Induction Machine

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