Dual Three-phase PMSM Research Articles

Optimized Fault-Tolerant Control of Dual Three-Phase PMSM Under Open-Switch Faults

In this article, an optimized fault-tolerant control (FTC) method without current judgement is proposed for open-switch faults (OSFs) in dual three-phase permanent magnet synchronous motor (DTPMSM) drives. The reason for the torque ripple under OSFs has been investigated. The theoretical analysis reveals a significant increase in torque ripple under OSFs. Then, an optimized FTC method is proposed for a DTPMSM with two isolated neutral points. The proposed method maintains the original control scheme, enabling the smooth transitions of current and torque between faulty operation and FTC without introducing noticeable torque ripples. In addition, the universality and robustness are enhanced by eliminating the need for current judgement, thereby avoiding misjudgments due to sinusoidal current zero crossings, sudden load, or speed changes. The experimental results are presented to validate the effectiveness of the proposed FTC strategy under OSFs on a laboratory DTPMSM.

Efficient Predictive Control for Dual Three-Phase PMSM Drive With Vector Transformation

Efficient Predictive Control for Dual Three-Phase PMSM Drive With Vector Transformation

Postfault Strategy of Universal Control for Dual Three-Phase PMSM Under Single Open-Phase Fault Considering Current Amplitude

Postfault Strategy of Universal Control for Dual Three-Phase PMSM Under Single Open-Phase Fault Considering Current Amplitude

High-Frequency Harmonics and Vibration Reduction for Dual Three-Phase PMSM Using Multiple Randomized SVPWM Strategy

High-Frequency Harmonics and Vibration Reduction for Dual Three-Phase PMSM Using Multiple Randomized SVPWM Strategy

MPTC for Dual Three-Phase PMSM Based on Novel Virtual Voltage Vector

MPTC for Dual Three-Phase PMSM Based on Novel Virtual Voltage Vector

Development and Analysis of Dual Three-Phase PMSM With Phase-Shifted Hybrid Winding for Aircraft Electric Propulsion Application

Development and Analysis of Dual Three-Phase PMSM With Phase-Shifted Hybrid Winding for Aircraft Electric Propulsion Application

Model-Free Predictive Current Control for Dual Three-Phase PMSM Drives With an Optimal Modulation Pattern

Model-Free Predictive Current Control for Dual Three-Phase PMSM Drives With an Optimal Modulation Pattern

Three-Vector-Based Model Predictive Torque Control for Dual Three-Phase PMSM With Torque and Flux Ripples Reduction

Three-Vector-Based Model Predictive Torque Control for Dual Three-Phase PMSM With Torque and Flux Ripples Reduction

Switching Frequency Signal-Injection Sensorless Control in Dual Three-Phase PMSM Robust to Nonideal Characteristics of Inverter System

Switching Frequency Signal-Injection Sensorless Control in Dual Three-Phase PMSM Robust to Nonideal Characteristics of Inverter System

Online Data-Driven Fault Diagnosis of Dual Three-Phase PMSM Drives Considering Limited Labeled Samples

Online Data-Driven Fault Diagnosis of Dual Three-Phase PMSM Drives Considering Limited Labeled Samples

A High-Precision Model for Dual Three-Phase PMSM Considering the Effect of Harmonics, Magnetic Saturation, and Electromagnetic Coupling

A High-Precision Model for Dual Three-Phase PMSM Considering the Effect of Harmonics, Magnetic Saturation, and Electromagnetic Coupling

A Novel Switching-Table-Based Direct Torque Control With Improved Current and Torque Steady-State Performance for Dual Three-Phase PMSM

A Novel Switching-Table-Based Direct Torque Control With Improved Current and Torque Steady-State Performance for Dual Three-Phase PMSM

An Optimized Modulation of Torque and Current Harmonics Suppression for Dual Three-Phase PMSM

An Optimized Modulation of Torque and Current Harmonics Suppression for Dual Three-Phase PMSM

Online Fault Detection of Open-Circuit Faults in a DTP-PMSM Using Double DQ Current Prediction

This research proposes a strategy to diagnose open-phase faults (OPF) and open-switching faults (OSF) in dual three-phase permanent magnet synchronous motor (DTP-PMSM) inverters. The method is based on the dual d–q predictive current model and involves establishing a mathematical model and utilizing the finite control set model predictive current extraction technique to predict the motor current. It then analyzes the characteristics of the switching-tube current under both normal and fault conditions. Finally, a fault predictive current model is introduced and the residual is calculated based on the predicted fault current value and the actual measured current value to diagnose the inverter fault. The proposed method effectively overcomes misjudgment issues encountered in traditional open-circuit fault diagnosis of inverters. It enhances the system’s response speed during dynamic processes and strengthens the robustness of diagnosis algorithm parameters. The experimental results demonstrate that the proposed method can rapidly, effectively, and accurately diagnose open-circuit faults presented in this paper fastest within one-fifth of a current cycle. It achieves a diagnostic accuracy rate of 97% in the dual three-phase permanent magnet synchronous motor drive system.

Drive Control Technology of Dual Three Phase Permanent Magnet Synchronous Motor for Electric Propulsion Aircraft

Green aviation is one of the effective ways to cope with future oil energy shortages and improve the atmospheric environment. As the executing mechanism of electric propulsion aircraft, the fault tolerance and safety of the electric drive system are the primary considerations. This article uses dual three-phase permanent magnet synchronous motors (PMSM) to drive propellers to provide power for electric propulsion aircraft. Firstly, the working principle of the propellers is analyzed, and a simulation model of the propellers is established using Simulink; Secondly, the space vector control method of dual three-phase PMSM is elaborated, and two different forms of space vector control are compared. At the same time, a vector control model of dual three-phase PMSM is established, and the third harmonic content of dual three-phase PMSM under two different space vectors is compared through simulation. Finally, establish a simulation model of dual three-phase PMSM driving propeller, compare the motor phase current and driving performance of different vector control methods, and analyze the advantages and disadvantages of different vector control methods.

Current Measurement Gain Compensation Using High-Frequency Signal Injection in Dual Three-Phase PMSM Systems

To online compensate the scaling errors in current measurement caused by incorrect calibration, temperature, aging, and noise, this paper proposes a new solution based on high-frequency (HF) carrier voltage injection in dual three phase permanent magnet synchronous machines. The relationship between the measured HF currents and scaling errors is derived. It shows that the amplitudes of the HF currents are proportional to the scaling errors, based on which three HF current control loops are subsequently designed to eliminate the measured HF currents and compensate the scaling errors. The designed HF controller are independent from the main current and torque regulators, and thus, it can be used for initial scaling gain calibration or periodically used during normal machine operation. Different from general three phase machine systems, the generated HF current components only exist in z <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> z <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> subspace, and thus, no extra torque ripples will be produced. Experimental results validate the proposed control algorithm.

Comparative Study of Advanced Modulation and Control Schemes for Dual Three-Phase PMSM Drives With Low Switching Frequencies

In this paper, multiple advanced low-switching-frequency modulation and control schemes are investigated for dual three-phase permanent-magnet synchronous motor (PMSM) drives. The modulation schemes under investigation include multisampling space vector modulation (MS-SVM), selective harmonic elimination pulse width modulation (SHEPWM) and synchronous optimal pulse width modulation (SOPWM) while the control schemes include complex vector control, model predictive control (MPC) and flux trajectory control-based model predictive pulse pattern control (MP <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> C). The difference between three-phase and dual three-phase PMSM drives at low switching frequencies is analyzed. Moreover, an optimal pulse width modulation (PWM)-based MP <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> C scheme is proposed for the dual three-phase PMSM, where the optimal PWM modulation and MP <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> C control are combined such that the optimal steady-state and dynamic control performance is achieved among the modulation and control schemes investigated. Experimental results are given to compare and validate the proposed control scheme.

Open-Circuit Fault-Tolerant Control for Dual Three-Phase PMSM With Minimum Torque Ripple Considering Phase Back EMF Harmonics

This paper proposed an open-circuit fault-tolerant control method for dual three-phase permanent magnet synchronous motor (DTPPMSM), which takes the back electromotive force (back EMF) harmonics into consideration and can achieve the minimum torque ripple. From the perspective of machine ontology and electromagnetic power, this paper analyzed the influence of back EMF harmonics on torque ripple. On this basis, by adjusting the phase of currents, specific order torque ripple components which can offset each other can be generated by the back EMF fundamental wave and harmonics, thus suppressing the specific order torque ripple of the whole motor. Furthermore, not limited to specific order torque ripple, the method can also be used to obtain the minimum overall torque ripple under open-circuit operation. Finite element analysis (FEA) and prototype experiment are employed to verify the proposed method.

Online Switching Strategy Between Dual Three-Phase PMSM and Open-Winding PMSM

Online Switching Strategy Between Dual Three-Phase PMSM and Open-Winding PMSM

Direct Torque Control Schemes for Dual Three-Phase PMSM Considering Unbalanced DC-Link Voltages

Direct Torque Control Schemes for Dual Three-Phase PMSM Considering Unbalanced DC-Link Voltages