Remedial Field-Oriented Control of Five-Phase Fault-Tolerant Permanent-Magnet Motor by Using Reduced-Order Transformation Matrices

Zhou, Huawei; Zhao, Wenxiang; Liu, Guohai; Cheng, Ran; Xie, Yongchun

doi:10.1109/tie.2016.2599501

Cited by 118 publications

(69 citation statements)

References 29 publications

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“…Owing to its remarkable high power density, high efficiency, and strong fault-tolerant ability, the multi-phase permanent magnet synchronous motor (PMSM) has attracted wide attention in high reliability fields, such as electric vehicles, ships, and rail transit [5][6][7][8][9]. The PMSM has a primary requirement of equipment safety and reliability, so faults must be detected and solved in time, and the system should be able to run with fault tolerance [10,11]. Compared with the traditional three-phase motor, the increase in the phase number of the multi-phase motor improves the redundancy of the system [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Fault-Tolerant Control Strategy for 12-Phase Permanent Magnet Synchronous Motor

et al. 2019

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Multi-phase motors have attracted increasing attention in fields seeking high reliability, such as electric vehicles, ships, and rail transit, as they exhibit advantages, such as high reliability and fault tolerance. In this study, we consider a 12-phase permanent magnet synchronous motor (PMSM). First, a mathematical model of the 12-phase PMSM in the static coordinate system is established and the model is simplified according to the constraint condition of neutral point isolation. Second, according to the principle of invariant magnetomotive force under normal and fault conditions, two optimal control strategies of winding current, i.e. maximum torque output (MTO) and minimum copper consumption (MCC), are proposed. For a single-phase open-circuit fault, two optimization methods are used to reconstruct the residual phase current, such that the motor can maintain normal torque output and exhibit lower torque ripple under the fault state. Finally, system simulation and experimental research are conducted; the results verify the accuracy and feasibility of the fault-tolerant control strategy of the 12-phase PMSM proposed in this paper.

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Section: Introductionmentioning

confidence: 99%

Fault-Tolerant Control Strategy for 12-Phase Permanent Magnet Synchronous Motor

et al. 2019

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“…The concept has been realized in both induction machines and PM machines [9][10][11][12][13]. Additionally, various control algorithms have been proposed to achieve the maximum attainable torque, or minimum torque ripple [14][15][16][17] under fault conditions. It is worth noting that the majorities of the above measures address the open circuit failure only.…”

Section: Introductionmentioning

confidence: 99%

A fault tolerant machine drive based on permanent magnet assisted synchronous reluctance machine

Wang

Griffo

et al. 2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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-A fault tolerant machine drive based on permanent magnet assisted synchronous reluctance machine (PMA SynRM) is proposed and investigated for aerospace applications where reliability and safety are crucial. In order to achieve enhanced fault tolerant capability, the risk of permanent magnet field that cannot be turned off under fault conditions is minimized without compromise in torque density and efficiency. This is achieved by employing a synchronous reluctance rotor topology with embedded permanent magnets. Three independent, segregated 3-phase windings are configured to ensure isolation and nonoverlapping between the three 3-phase winding sets. Each 3-phase winding set is driven by a standard 3-phase inverter to facilitate fast integration and cost reduction. The machine behavior under various fault conditions has been evaluated by finite element (FE) simulations. A 40kW prototype was designed, constructed and tested. The test results demonstrate the performance and excellent fault tolerant capability of the proposed drive system under various faults, including open circuit and short circuit conditions. Index Terms-Fault tolerant machine, permanent magnet assisted synchronous reluctance machine, multi-phase machine, non-overlapped winding configuration. I. INTRODUCTIONAULT tolerant machine and drives are capable of providing uninterrupted operation during fault conditions, therefore being attractive in safety critical applications, such as aerospace and electric traction [1,2]. While electrical drives possess enhanced functionality, adaptability and controllability compared with conventional mechanical, hydraulic, and pneumatic driven systems [3], relative low reliability of electric drive systems restricts their wide applications since an unexpected fault would cause serious consequences or economic losses. Thus, fault tolerance is an essential requirement for electrical drives to attain high availability in safety critical applications.To this end, various fault tolerant machine topologies and techniques have been investigated in literatures. The most straightforward approach is to adopt two or more machine-drive modules either in series or in parallel [4,5]. However, use of multiple machine drives for redundant operation occupies large space and necessitates additional accessories to guarantee its operation in healthy and fault conditions, resulting in low power density and bulky size. Alternatively, fault tolerance may be achieved on a single 3-phase machine by employing a neutral connection to the midpoint of the DC link or to a fourth inverter leg [6]. Zero sequence current is utilized to generate the equivalent rotating magneto-motive force (MMF) if one phase is open-circuited. The neutral connection can be eliminated by employing more than three phases in a single machine [7,8]. Depending on the number of phases, a multi-phase (number of phases>3) machine may be capable of continuous operation when one or more than one phase has failed. The concept has been realized in both induction machin...

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“…The simulation model in Figure 4 was built by Simulink to generate current in single and two open-phase control strategies. Figure 5(a) shows the fault-tolerant current generated by minimum copper loss (MCL) control law (13). Figure 5(b) is the fault-tolerant current generated by maximum torque output (MTO) control law (15).…”

Section: Simulation Of On-linefault-tolerant Current Generationmentioning

confidence: 99%

Unified Fault-tolerant Control Strategy with Torque Ripple Compensation for Five-phase Permanent Magnet Synchronous Motor Based on Normal Decoupling

et al. 2019

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In this paper, the decoupling matrix in a five-phase permanent magnet synchronous motor (FPMSM) is rebuilt and changed, according to different open-phase conditions, which complicate the switch and control algorithm. This paper proposes a unified fault-tolerant control strategy with decoupling transformation matrix, effectively suppressing the torque ripple for several open-phase faults. The current algorithms for different open-phase faults are demonstrated; torque ripple, especially, is analyzed with third harmonic magnetomotive force (MMF). The unified current control law is expressed with two adjustable coefficients, which are regulated for torque ripple compensation. As the current control equation remains unchanged, the fault-tolerant can smoothly switch from normal to fault condition, only with different coefficients. The proposed method with torque compensation (TC) can realize effective suppression of torque ripple. The decoupling relationship between open-phase control laws and fault-tolerant current is verified by simulation. The torque ripple of fault-tolerant and effect of torque compensation (TC) under all fault-tolerant conditions are simulated by finite element simulation. The stability of switching and correctness of torque compensation are verified by experiments.

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Remedial Field-Oriented Control of Five-Phase Fault-Tolerant Permanent-Magnet Motor by Using Reduced-Order Transformation Matrices

Cited by 118 publications

References 29 publications

Fault-Tolerant Control Strategy for 12-Phase Permanent Magnet Synchronous Motor

Fault-Tolerant Control Strategy for 12-Phase Permanent Magnet Synchronous Motor

A fault tolerant machine drive based on permanent magnet assisted synchronous reluctance machine

Unified Fault-tolerant Control Strategy with Torque Ripple Compensation for Five-phase Permanent Magnet Synchronous Motor Based on Normal Decoupling

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