Abstract
Multiphase brushless direct current (BLDC) motors can meet the increasing demand for higher reliability in motor drives applicable in electric vehicles by integrating fault diagnosis to a fault-tolerant (FT) control method. To achieve this goal, a modified FT finite control set model predictive control (FCS–MPC) is proposed in this paper. The dead beat control is used to predict the reference voltage applied by the inverter. A sensitivity analysis is done to show the effect of model uncertainty on the controller performance. In addition, a simple, fast and general open switch and short circuit fault detection (FD) method in voltage source inverter (VSI) is presented. The FD method is capable of detecting open switch, open phase, and short circuit faults without any auxiliary variable. Moreover, it is robust to both speed and load transients in a motor drive. To validate the presented theory, experimental results are conducted on a five-phase BLDC motor drive with outer rotor in wheel structure.
Original language | English |
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Pages (from-to) | 56-66 |
Journal | Electric Power Systems Research |
Volume | 132 |
Early online date | 11 Dec 2015 |
DOIs | |
Publication status | Published - Mar 2016 |
Keywords
- fault detection
- multiphase fault-tolerant drive
- BLDC motor
- finite control set model predictive control