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| Content Provider | IET Digital Library |
|---|---|
| Author | Hoang, Khoa Dang Zhu, Zi Qiang Foster, Martin P. |
| Abstract | This study presents a novel direct torque control (DTC) of permanent magnet (PM) brushless AC (BLAC) drive under single-phase open-circuit fault (SOF) accounting for the influences of inverter voltage drop (IVD), together with novel current model-based and voltage model-based stator flux estimation schemes for post-fault operation. It is demonstrated that for accurately elaborating the modified mathematical model, the voltage induced in the stator open phase winding and its relevant flux linkage should be taken into account although they do not contribute to torque production in the post-fault operating mode. It is also proven that reconfiguration of the conventional six-switch three-phase inverter for the purpose of fault-tolerant control results in a significant magnitude imbalance between the α- and β-components of IVD. Thus, the influences of this unbalanced issue on performance of the two proposed stator flux estimation methods are investigated in details and a compensation method for the voltage model-based stator flux estimator is proposed and experimentally verified. It is shown that fault-tolerant control with high performance operation can be maintained for a DTC-based PM BLAC drive under SOF using the proposed modified mathematical model. |
| Starting Page | 369 |
| Ending Page | 380 |
| Page Count | 12 |
| ISSN | 17518660 |
| Volume Number | 7 |
| e-ISSN | 17518679 |
| Issue Number | Issue 5, May (2013) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-epa/7/5 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2012.0290 |
| Journal | IET Electric Power Applications |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | A.C. Machine AC Machines Brushless Machines Compensation Compensation Method Control of Electric Power System Current Control Current Model-based Stator Flux Estimation Scheme Direct Torque Control Drive DTC Electric Current Control Electric Drive Electric Potential Estimation Theory Fault Diagnosis Fault Tolerant Control Invertors IVD Machine Control Machine Theory Magnetic Flux Mathematical Analysis Mechanical Variables Control Modified Mathematical Model Permanent Magnet Brushless AC Drive Permanent Magnet Machine Phase And Gain Control Phase Control PM BLAC Post-fault Operating Mode Power Converter Power Supplies to Apparatus Relevant Flux Linkage Single-phase Open-circuit Fault Accounting Six-switch Three-phase Inverter Voltage Drop Influence SOF Statistics Stator Open Phase Winding Stators Torque Control Torque Production Voltage Control Voltage Model-based Stator Flux Estimation Scheme |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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