Research on a Single Phase-Loss Fault-Tolerant Control Strategy for a New Flux-Modulated Permanent-Magnet Compact In-Wheel Motor

2016 ◽  
Vol 31 (2) ◽  
pp. 658-666 ◽  
Author(s):  
Ying Fan ◽  
Weixia Zhu ◽  
Xiangyang Zhang ◽  
Ming Cheng ◽  
K. T. Chau
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
Single Phase ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Phase Loss

scholarly journals Sensorless Control of a Fault Tolerant PMSM Drives in Case of Single-Phase Open Circuit Fault

2016 ◽  
Vol 7 (4) ◽  
pp. 1061
Author(s):  
Kamel Saleh ◽  
Mark Sumner
Keyword(s):  
Control Strategy ◽  
System Performance ◽  
Single Phase ◽  
Fault Tolerant ◽  
Sensorless Control ◽  
Fault Tolerant Control ◽  
Performance Degradation ◽  
Open Circuit ◽  
Phase Inverter ◽  
Simulation Results

This paper introduces a sensorless-speed-controlled PMSM motor fed by a four-leg inverter in case of a single phase open circuit fault regardless in which phase is the fault. To minimize the system performance degradation due to a single phase open circuit fault, a fault tolerant control strategy that includes taking appropriate actions to control the two remaining healthy currents is used in addition to use the fourth leg of the inverter.  Tracking the saliency is done through measuring the dynamic current responses of the healthy phases of the PMSM motor due the IGBT switching actions using the fundamental PWM method without introducing any modification to the operation of the fourth leg of the inverter. Simulation results are provided to verify the effectiveness of the proposed strategy for sensorless controlling of a PMSM motor driven by a fault-tolerant four-phase inverter over a wide speed ranges under the case of a single phase open circuit.

scholarly journals Improved SVPWM Fault-Tolerant Control Strategy for Five-Phase Permanent-Magnet Motor

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4626 ◽  
Author(s):  
Liang Xu ◽  
Wenxiang Zhao ◽  
Guohai Liu
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
Pulse Width Modulation ◽  
High Efficiency ◽  
Fault Tolerant ◽  
Control Strategies ◽  
Fault Tolerant Control ◽  
Open Circuit ◽  
Permanent Magnet Motors ◽  
Permanent Magnet Motor

Multiphase permanent-magnet motors have received a lot of attention in the past few years owing to the merits of high power density, high efficiency and high fault-tolerant capability. Particularly, high fault tolerance is very desirable for safety-critical applications. This paper proposes an improved space vector pulse-width modulation (SVPWM) fault-tolerant control for five-phase permanent-magnet motors. First, generalized five-phase SVPWM fault-tolerant control is deduced and analyzed based on single-phase open-circuit fault, thus obtaining various SVPWM fault-tolerant control strategies and yielding a greatly increased capacity to enhance fault-tolerant performance of motor. Then, an improved SVPWM fault-tolerant control strategy with increased DC bus voltage utilization and reduced current harmonics is proposed and compared with the traditional one. Last, effectiveness and superiority of the proposed control strategy is verified by both simulation and experimental results on a five-phase permanent-magnet motor.

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

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1127 ◽  
Author(s):  
Guodong Sun ◽  
Guijie Yang ◽  
Yanyi Wang ◽  
Jianyong Su
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
Fault Tolerant ◽  
Permanent Magnet Synchronous Motor ◽  
Fault Tolerant Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Current Control ◽  
Magnetomotive Force ◽  
Open Phase

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.

scholarly journals Real-Time Fault Diagnosis and Fault-Tolerant Control Strategy for Hall Sensors in Permanent Magnet Brushless DC Motor Drives

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1268
Author(s):  
Xi Zhang ◽  
Yiyun Zhao ◽  
Hui Lin ◽  
Saleem Riaz ◽  
Hassan Elahi
Keyword(s):  
Fault Diagnosis ◽  
Permanent Magnet ◽  
Real Time ◽  
Control Strategy ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Hall Sensor ◽  
Motor Drives ◽  
Sensor Faults ◽  
Hall Sensors

The Hall sensor is the most commonly used position sensor of the permanent magnet brushless direct current (PMBLDC) motor. Its failure may lead to a decrease in system reliability. Hence, this article proposes a novel methodology for the Hall sensors fault diagnosis and fault-tolerant control in PMBLDC motor drives. Initially, the Hall sensor faults are analyzed and classified into three fault types. Taking the Hall signal as the system state and the conducted MOSFETs as the system event, the extended finite state machine (EFSM) of the motor in operation is established. Meanwhile, a motor speed observer based on the super twisting algorithm (STA) is designed to obtain the speed signal of the proposed strategy. On this basis, a real-time Hall sensor fault diagnosis strategy is established by combining the EFSM and the STA speed observer. Moreover, this article proposes a Hall signal reconstruction strategy, which can generate compensated Hall signal to realize fault-tolerant control under single or double Hall sensor faults. Finally, theoretical analysis and experimental results validate the superior effectiveness of the proposed real-time fault diagnosis and fault-tolerant control strategy.

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

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3462 ◽  
Author(s):  
Hanying Gao ◽  
Wen Zhang ◽  
Yu Wang ◽  
Zhuo Chen
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
Fault Tolerant ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Fault Tolerant Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Open Circuit ◽  
Magnetomotive Force

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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