Generalised fault diagnostic method for power transistors in asymmetric half‐bridge power converter of SRM drive

Han, Guoqiang; Chen, Hao; Guan, Guorui

doi:10.1049/iet-epa.2018.5375

Cited by 17 publications

(7 citation statements)

References 21 publications

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“…Gate signals and phase currents are important features in faulty conditions, which can be acquired without extra devices. Combining these two signals improves the fault diagnosis process [45]. The above methods are feasible and effective, which have great potential for high-performance fault diagnosis.…”

Section: Discussionmentioning

confidence: 99%

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An Overview of Fault-Diagnosis and Fault-Tolerance Techniques for Switched Reluctance Machine Systems

Gan

Chen

et al. 2019

IEEE Access

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This paper presents a technical overview for fault diagnosis and fault-tolerant strategies of switched reluctance machine (SRM) systems. With the widespread utilization of electrical motors, stability and reliability become the most important considerations for safety. SRMs are famous for their great robustness, wide speed range, and high fault-tolerant capability, which are much suitable for high-speed and safety-critical applications. Although the SRM drive have some fault tolerance ability, the fault still seriously affects the system performance. The faults happening in different parts, such as converter, motor winding, sensors, and rotor, may lead to low torque, large torque ripple, overcurrent, insulation damage, and even system broken-down, without any fault-tolerant consideration. Therefore, it is important and urgent to improve the motor system reliability and robustness for SRM drives. Aiming at offering novel solutions to the faults in SRM drives, this paper begins with mathematical modeling of the SRM, and then concentrates on the state-of-art fault diagnosis and fault tolerance techniques to enhance the fault ride-through ability. Two categories, containing fault diagnosis and fault tolerance technologies are emphasized for fast faults locating and stable post-fault operation. Advanced technologies are reviewed, classified, and compared comprehensively. Besides, several fault diagnosis and tolerance schemes that have been developed by authors are presented and discussed as well. Finally, the research status and outlooks on this topic are put forward. It is our target to offer a global vision on fault-related strategies and bring out promising ideas about fault-related techniques in SRM drives. INDEX TERMS Switched reluctance motor (SRM), fault diagnosis and fault tolerance strategies.

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Section: Discussionmentioning

confidence: 99%

“…Three coefficients A, B, and C denoted by (19) are used for fault identification in [45]. When the estimated and detected currents vary from each other, the fault location algorithm is adopted to find faults precisely.…”

Section: ) Gate Signals Auxiliarymentioning

confidence: 99%

An Overview of Fault-Diagnosis and Fault-Tolerance Techniques for Switched Reluctance Machine Systems

Gan

Chen

et al. 2019

IEEE Access

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“…Therefore, research on fault diagnosis in power converters is important to improve the reliability of SRM drive systems. Methods of fault diagnosis for power converters can be mainly divided into spectrum analysis [13,14], current analysis [15–17], the drive signal assistant [12,18–20], and the current reconfiguration method with a fault diagnosis function [21,22]. In the study by Gan et al.…”

Section: Introductionmentioning

confidence: 99%

“…In the study by Han et al. [20], three current sensors were rearranged, distinct fault features were extracted, and driving signals were used to formulate a mathematical model of the fault characteristics and create a fault dictionary. A method of configuration of the current sensors was proposed in the study by Peng et al.…”

Section: Introductionmentioning

confidence: 99%

Fault diagnosis of power transistors in a power converter of SRM drive based on a state inverse solution

Liu

Wang

2021

IET Electric Power Applications

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Switched reluctance motor drives are a common technology used in traction motor drives. Herein, an online method is proposed for the fault diagnosis of power transistors in the popular asymmetric half‐bridge power converter of the SRM drive. Based on the rearrangement of three current sensors, each phase current was first calculated by solving equations associated with their detected values and the drive signals of the transistors. The faults in the transistors were then preliminarily detected by monitoring the error between the calculated sum of currents and the sum of actual phase currents detected by a current sensor. Once a fault was identified, the actual states of all transistors of the power converter were solved for inversely using a mathematical model and the necessary rule for a trade‐off. Then, the faulty transistors and the fault types were identified by comparing the actual states with the drive signals. Compared with prevalent methods, the diagnostic range of the proposed scheme was wider, and its control modes and the number of motor phases were not limited. A higher accuracy than currently available methods was its prominent advantage. The effectiveness of the proposed solution was also validated on a three‐phase 6/4 SRM drive.

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“…The asymmetrical half-bridge topology [35][36][37][38], represented in Figure 2, uses 2n active switches, where n is the number of machine phases. It can operate in hard-switching (two operation modes) and soft-switching (three operation modes).…”

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confidence: 99%

A Review of the Power Converter Interfaces for Switched Reluctance Machines

Pires

Cordeiro

et al. 2020

Energies

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The use of power electronic converters is essential for the operation of Switched Reluctance Machines (SRMs). Many topologies and structures have been developed over the last years considering several specific applications for this kind of machine, improving the control strategies, performance range, fault-tolerant operation, among other aspects. Thus, due to the great importance of power electronic converters in such applications, this paper is focused on a detailed review of main structures and topologies for SRM drives. The proposed study is not limited to the classic two-level power converters topologies dedicated to the SRMs; it also presents a review about recent approaches, such as multilevel topologies and based on impedance source network. Moreover, this review is also focused on a new class of topologies associated to these machines, namely the ones with fault-tolerant capability. This new category of topologies has been a topic of research in recent years, being currently considered an area of great interest for future research work. An analysis, taking into consideration the main features of each structure and topology, was addressed in this review. A classification and comparison of the several structures and topologies for each kind of converter, considering modularity, boost capability, number of necessary switches and phases, integration in the machine design, control complexity, available voltage levels and fault-tolerant capability to different failure modes, is also presented. In this way, this review also includes a description of the presented solutions taking into consideration the reliability of the SRM drive.

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Generalised fault diagnostic method for power transistors in asymmetric half‐bridge power converter of SRM drive

Cited by 17 publications

References 21 publications

An Overview of Fault-Diagnosis and Fault-Tolerance Techniques for Switched Reluctance Machine Systems

An Overview of Fault-Diagnosis and Fault-Tolerance Techniques for Switched Reluctance Machine Systems

Fault diagnosis of power transistors in a power converter of SRM drive based on a state inverse solution

A Review of the Power Converter Interfaces for Switched Reluctance Machines

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